FDUS / Fidus Investment Corporation - SEC-arkivering, Årsberetning, Fuldmagtserklæring

NOTICE OF REDEMPTION TO THE HOLDERS OF THE 3.50% Notes due 2026 of Fidus Investment Corporation (CUSIP No. 316500 AC1)* Redemption Date: June 29, 2026

EX-99.1 Exhibit 99.1 NOTICE OF REDEMPTION TO THE HOLDERS OF THE 3.50% Notes due 2026 of Fidus Investment Corporation (CUSIP No. 316500 AC1)* Redemption Date: June 29, 2026 NOTICE IS HEREBY GIVEN, pursuant to Section 1104 of the indenture, dated as of February 2, 2018 (the “Base Indenture”), by and between Fidus Investment Corporation, a Maryland corporation (the “Company”), and U.S. Bank Trust Com

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 29, 2026 Fidus Investment Cor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 29, 2026 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Commissi

REGISTRATION RIGHTS AGREEMENT by and among Fidus Investment Corporation the several purchasers listed in Schedule I to the Purchase Agreement Dated as of May 29, 2026

EX-4.1 Exhibit 4.1 REGISTRATION RIGHTS AGREEMENT by and among Fidus Investment Corporation and the several purchasers listed in Schedule I to the Purchase Agreement Dated as of May 29, 2026 REGISTRATION RIGHTS AGREEMENT This Registration Rights Agreement (this “Agreement”) is made and entered into as of May 29, 2026, by and among Fidus Investment Corporation, a Maryland corporation (the “Company”)

FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2026 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.62 per Share for Second Quarter 2026 Base Dividend of $0.43 and Supplemental Dividend of $0.19 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2026 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.62 per Share for Second Quarter 2026 Base Dividend of $0.43 and Supplemental Dividend of $0.19 Per Share EVANSTON, Ill., May 7, 2026 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inve

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 7, 2026 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 2, 2026 Fidus Investment Co

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 2, 2026 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Commiss

Filed Pursuant to Rule 424(b)(2) Registration No. 333-293856 PROSPECTUS SUPPLEMENT (To Prospectus Dated February 27, 2026) Up to $ 4 00,000,000 FIDUS INVESTMENT CORPORATION Common stock We are an externally managed, closed-end, non-diversified manage

Filed Pursuant to Rule 424(b)(2) Registration No. 333-293856 PROSPECTUS SUPPLEMENT (To Prospectus Dated February 27, 2026) Up to $ 4 00,000,000 FIDUS INVESTMENT CORPORATION Common stock We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amende

Security Type

Calculation of Filing Fee Tables N-2 FIDUS INVESTMENT Corp Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Equity Common Stock, $0.

FIDUS INVESTMENT CORPORATION (a Maryland Corporation) Common Stock, Par Value $0.001 Per Share AMENDMENT NO. 3 TO EQUITY DISTRIBUTION AGREEMENT Dated as of March 2, 2026

EX-10.1 Exhibit 10.1 FIDUS INVESTMENT CORPORATION (a Maryland Corporation) Common Stock, Par Value $0.001 Per Share AMENDMENT NO. 3 TO EQUITY DISTRIBUTION AGREEMENT Dated as of March 2, 2026 This Amendment No. 3, dated March 2, 2026 (the “Amendment”), is to the Equity Distribution Agreement, dated November 10, 2022, as amended by Amendment No. 1 to the Equity Distribution Agreement, dated August 1

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE

EX-99.(D)(3) Exhibit (d)(3) SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION (Exact name of Trustee as specified in its charter) 91-1

As filed with the Securities and Exchange Commission on February 27, 2026 Securities Act File No. 333-     UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-2 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Pre-Ef

As filed with the Securities and Exchange Commission on February 27, 2026 Securities Act File No.

Security Type

Calculation of Filing Fee Tables N-2 FIDUS INVESTMENT Corp Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective Date Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward Newly Registered Securities Fees to be Paid 1 Equity Common Stock, $0.

Consent of Independent Registered Public Accounting Firm

EX-99.(N) Exhibit (n) Consent of Independent Registered Public Accounting Firm We consent to the incorporation by reference in this Registration Statement on Form N-2 and related Prospectus of Fidus Investment Corporation of our reports dated February 26, 2026, relating to the consolidated financial statements, including the senior securities table, and the effectiveness of internal control over f

February 27, 2026

EX-99.(L) Exhibit (l) Eversheds Sutherland (US) LLP 700 Sixth Street NW, Suite 700 Washington, DC 2001-3980 February 27, 2026 Fidus Investment Corporation 1603 Orrington Avenue, Suite 1005 Evanston, Illinois 60201 Re: Fidus Investment Corporation   Registration Statement on Form N-2 Ladies and Gentlemen: We have acted as counsel to Fidus Investment Corporation, a Maryland corporation (the “Company

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 26, 2026 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Em

SUBSIDIARIES OF FIDUS INVESTMENT CORPORATION

Exhibit 21.1 SUBSIDIARIES OF FIDUS INVESTMENT CORPORATION Name Jurisdiction FCDS Corp. Delaware FCMH Equity Corp. Delaware FIC Funding, LLC Delaware Fidus Capital GP, LLC Delaware Fidus Investment GP, LLC Delaware Fidus Mezzanine Capital, L.P. Delaware Fidus Mezzanine Capital II, L.P. Delaware Fidus Mezzanine Capital III, L.P. Delaware Fidus Mezzanine Capital IV, L.P. Delaware Fidus Investment Hol

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement.

FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2025 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.52 per Share for First Quarter 2026 Base Dividend of $0.43 and Supplemental Dividend of $0.09 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2025 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.52 per Share for First Quarter 2026 Base Dividend of $0.43 and Supplemental Dividend of $0.09 Per Share EVANSTON, Ill., February 26, 2026 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and e

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One)  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 OR  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00861 FIDUS INVESTME

FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2026 DIVIDEND

Exhibit 99.1 FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2026 DIVIDEND EVANSTON, Ill., February 17, 2026– Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”) today announced that its Board of Directors on February 17, 2026 declared a base dividend of $0.43 per share and a supplemental dividend of $0.09 per share for the first quarter of 2026. The Company’s dividends will

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 17, 2026 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Em

FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2025 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.50 per Share for Fourth Quarter 2025 Base Dividend of $0.43 and Supplemental Dividend of $0.07 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2025 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.50 per Share for Fourth Quarter 2025 Base Dividend of $0.43 and Supplemental Dividend of $0.07 Per Share EVANSTON, Ill., November 6, 2025 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing

Up to $300,000,000 Common Stock Supplement No. 5, dated November 6, 2025 Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024

Filed Pursuant to Rule 424(b)(3) File No. 333-277540 Up to $300,000,000 Common Stock Supplement No. 5, dated November 6, 2025 to Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated May 9, 2024 (the “ATM Prospectus Supplement”), and the accompanying prospectus, dated

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 ☐ TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 6, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emp

CREDIT AND SECURITY AGREEMENT Dated as of October 16, 2025 FIC FUNDING, LLC, as Borrower, FIDUS INVESTMENT CORPORATION, as Servicer, FIDUS INVESTMENT CORPORATION, as Equityholder, THE LENDERS FROM TIME TO TIME PARTIES HERETO, ING CAPITAL LLC, as Admi

EX-10.1 Exhibit 10.1 Execution Version CREDIT AND SECURITY AGREEMENT Dated as of October 16, 2025 among FIC FUNDING, LLC, as Borrower, FIDUS INVESTMENT CORPORATION, as Servicer, FIDUS INVESTMENT CORPORATION, as Equityholder, THE LENDERS FROM TIME TO TIME PARTIES HERETO, ING CAPITAL LLC, as Administrative Agent, ING CAPITAL LLC, as Lead Arranger and WESTERN ALLIANCE TRUST COMPANY, N.A., as Custodia

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 16, 2025 Fidus Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 16, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Comm

NOTICE OF REDEMPTION TO THE HOLDERS OF THE 4.75% Notes due 2026 of Fidus Investment Corporation (CUSIP No. 316500 AB3)* Redemption Date: November 3, 2025

EX-99.1 Exhibit 99.1 NOTICE OF REDEMPTION TO THE HOLDERS OF THE 4.75% Notes due 2026 of Fidus Investment Corporation (CUSIP No. 316500 AB3)* Redemption Date: November 3, 2025 NOTICE IS HEREBY GIVEN, pursuant to Section 1104 of the indenture, dated as of February 2, 2018 (the “Base Indenture”), by and between Fidus Investment Corporation, a Maryland corporation (the “Company”), and U.S. Bank Trust

FIDUS INVESTMENT CORPORATION 6.750% Notes due 2030 UNDERWRITING AGREEMENT

EX-1.1 Exhibit 1.1 FIDUS INVESTMENT CORPORATION $100,000,000 6.750% Notes due 2030 UNDERWRITING AGREEMENT October 1, 2025 Raymond James & Associates, Inc. ING Financial Markets LLC As representatives of the several underwriters named in Exhibit A c/o Raymond James & Associates, Inc. 880 Carillon Parkway St. Petersburg, Florida 33716 c/o ING Financial Markets LLC 1133 Avenue of the Americas New Yor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 1, 2025 Fidus Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 1, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Commi

Filed Pursuant to Rule 424(b)(2) Registration No. 333-277540 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 8, 2024) $100,000,000 6.750% Notes due 2030 We are an externally managed, closed-end, non-diversified management investment company that has e

Filed Pursuant to Rule 424(b)(2) Registration No. 333-277540 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 8, 2024) $100,000,000 6.750% Notes due 2030 We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). Our investment

SUBJECT TO COMPLETION DATED OCTOBER 1, 2025

424B2 Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No. 333-277540 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has been filed with and declared effective by the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an

FIDUS INVESTMENT CORPORATION 6.750% Notes due 2030 PRICING TERM SHEET October 1, 2025

FWP Filed pursuant to Rule 433 Issuer Free Writing Prospectus dated October 1, 2025 Relating to the Preliminary Prospectus Supplement dated October 1, 2025 and Prospectus dated May 8, 2024 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 ☐ TRANSITION REPORT PU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inves

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 7, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emplo

FIDUS INVESTMENT CORPORATION ANNOUNCES Second QUARTER 2025 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.57 per Share for Third Quarter 2025 Base Dividend of $0.43 and Supplemental Dividend of $0.14 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Second QUARTER 2025 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.57 per Share for Third Quarter 2025 Base Dividend of $0.43 and Supplemental Dividend of $0.14 Per Share EVANSTON, Ill., August 7, 2025 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing s

Up to $300,000,000 Common Stock Supplement No. 4, dated August 7, 2025 Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024

Filed Pursuant to Rule 424(b)(3) File No. 333-277540 Up to $300,000,000 Common Stock Supplement No. 4, dated August 7, 2025 to Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated May 9, 2024 (the “ATM Prospectus Supplement”), and the accompanying prospectus, dated Ma

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 11, 2025 Fidus Investment Co

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 11, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commiss

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 8, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Employer

Filed Pursuant to Rule 424(b)(3) File No. 333-277540 Up to $300,000,000 Common Stock Supplement No. 3, dated May 8, 2025 to Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024 This supplement amends, supplements or modifies certain

Filed Pursuant to Rule 424(b)(3) File No. 333-277540 Up to $300,000,000 Common Stock Supplement No. 3, dated May 8, 2025 to Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated May 9, 2024 (the “ATM Prospectus Supplement”), and the accompanying prospectus, dated May 8

FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2025 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.54 per Share for Second Quarter 2025 Base Dividend of $0.43 and Supplemental Dividend of $0.11 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2025 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.54 per Share for Second Quarter 2025 Base Dividend of $0.43 and Supplemental Dividend of $0.11 Per Share EVANSTON, Ill., May 8, 2025 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inve

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 17, 2025 Fidus Investment C

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 17, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commis

NOTICE OF REDEMPTION TO THE HOLDERS OF THE 4.75% Notes due 2026 of Fidus Investment Corporation (CUSIP No. 316500 AB3)* Redemption Date: May 21, 2025

EX-99.1 Exhibit 99.1 NOTICE OF REDEMPTION TO THE HOLDERS OF THE 4.75% Notes due 2026 of Fidus Investment Corporation (CUSIP No. 316500 AB3)* Redemption Date: May 21, 2025 NOTICE IS HEREBY GIVEN, pursuant to Section 1104 of the indenture, dated as of February 2, 2018 (the “Base Indenture”), by and between Fidus Investment Corporation, a Maryland corporation (the “Company”), and U.S. Bank Trust Comp

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒          Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement.

Sixth Supplemental Indenture, dated as of March 19, 2025, by and between Fidus Investment Corporation and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank National Association), as trustee (Filed as Exhibit 4.2 to the Registrant’s Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission on March 19, 2025 and incorporated herein by reference).

Exhibit 4.2 SIXTH SUPPLEMENTAL INDENTURE between FIDUS INVESTMENT CORPORATION and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee Dated as of March 19, 2025 THIS SIXTH SUPPLEMENTAL INDENTURE (this “Sixth Supplemental Indenture”), dated as of March 19, 2025 is between Fidus Investment Corporation, a Maryland corporation (the “Company”), and U.S. Bank Trust Company, National Association (a

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 19, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commis

Filed Pursuant to Rule 424(b)(2) Registration No. 333-277540 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 8, 2024) $100,000,000 6.750% Notes due 2030 We are an externally managed, closed-end, non-diversified management investment company that has e

Filed Pursuant to Rule 424(b)(2) Registration No. 333-277540 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 8, 2024) $100,000,000 6.750% Notes due 2030 We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “1940 Act”). Our investment

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 12, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commis

Underwriting Agreement, dated as of March 12, 2025, by and among Fidus Investment Corporation, Fidus Investment Advisors, LLC and Raymond James & Associates, Inc., as representative of the several underwriters named in Exhibit A thereto

Exhibit 1.1 Execution Version FIDUS INVESTMENT CORPORATION $100,000,000 6.750% Notes due 2030 UNDERWRITING AGREEMENT March 12, 2025 Raymond James & Associates, Inc. As representative of the several underwriters named in Exhibit A c/o Raymond James & Associates, Inc. 880 Carillon Parkway St. Petersburg, Florida 33716 Ladies and Gentlemen: Fidus Investment Corporation, a Maryland corporation (the “C

FIDUS INVESTMENT CORPORATION 6.750% Notes due 2030 PRICING TERM SHEET March 12, 2025

FWP Filed pursuant to Rule 433 Issuer Free Writing Prospectus dated March 12, 2025 Relating to the Preliminary Prospectus Supplement dated March 12, 2025 and Prospectus dated May 8, 2024 Registration No.

SUBJECT TO COMPLETION, DATED MARCH 12, 2025

Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No. 333-277540 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has been filed with and declared effective by the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer

Up to $300,000,000 Common Stock Supplement No. 2, dated March 6, 2025 Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024

Filed Pursuant to Rule 424(b)(3) File No. 333-277540 Up to $300,000,000 Common Stock Supplement No. 2, dated March 6, 2025 to Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated May 9, 2024 (the “ATM Prospectus Supplement”), and the accompanying prospectus, dated May

FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2024 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.54 per Share for First Quarter 2025 Base Dividend of $0.43 and Supplemental Dividend of $0.11 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2024 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.54 per Share for First Quarter 2025 Base Dividend of $0.43 and Supplemental Dividend of $0.11 Per Share EVANSTON, Ill., March 6, 2025 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equit

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒          Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One)  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00861 FIDUS INVESTME

List of Subsidiaries.*

Exhibit 21.1 SUBSIDIARIES OF FIDUS INVESTMENT CORPORATION Name Jurisdiction FCDS Corp. Delaware FCMH Equity Corp. Delaware Fidus Capital GP, LLC Delaware Fidus Investment GP, LLC Delaware Fidus Mezzanine Capital, L.P. Delaware Fidus Mezzanine Capital II, L.P. Delaware Fidus Mezzanine Capital III, L.P. Delaware Fidus Mezzanine Capital IV, L.P. Delaware Fidus Investment Holdings, Inc. Delaware

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 6, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Employ

FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2025 DIVIDEND

Exhibit 99.1 FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2025 DIVIDEND EVANSTON, Ill., February 18, 2025– Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”) today announced that its Board of Directors on February 18, 2025 declared a base dividend of $0.43 per share and a supplemental dividend of $0.11 per share for the first quarter of 2025. The Company’s dividends will

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 18, 2025 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Em

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 ☐ TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 31, 2024 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emp

FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2024 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.61 per Share for Fourth Quarter 2024 Base Dividend of $0.43 and Supplemental Dividend of $0.18 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2024 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.61 per Share for Fourth Quarter 2024 Base Dividend of $0.43 and Supplemental Dividend of $0.18 Per Share EVANSTON, Ill., October 31, 2024 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 1, 2024 Fidus Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 1, 2024 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Commi

APP ORDR

UNITED STATES OF AMERICA BEFORE THE SECURITIES AND EXCHANGE COMMISSION INVESTMENT COMPANY ACT OF 1940 Release no.

APP NTC

SECURITIES AND EXCHANGE COMMISSION (Investment Company Act Release No. 35289; File No. 812-15496 Fidus Investment Corporation, et al. August 2, 2024 AGENCY: Securities and Exchange Commission (“Commission” or “SEC”). ACTION: Notice. Notice of application for an order under sections 17(d) and 57(i) of the Investment Company Act of 1940 (the “Act”) and rule 17d-1 under the Act to permit certain join

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 1, 2024 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emplo

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 ☐ TRANSITION REPORT PU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inves

Up to $300,000,000 Common Stock Supplement No. 1, dated August 1, 2024 Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024

Filed Pursuant to Rule 424(b)(3) File No. 333-277540 Up to $300,000,000 Common Stock Supplement No. 1, dated August 1, 2024 to Prospectus, dated May 8, 2024 Prospectus Supplement, dated May 9, 2024 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated May 9, 2024 (the “ATM Prospectus Supplement”), and the accompanying prospectus, dated Ma

FIDUS INVESTMENT CORPORATION ANNOUNCES Second QUARTER 2024 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.57 per Share for Third Quarter 2024 Base Dividend of $0.43 and Supplemental Dividend of $0.14 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Second QUARTER 2024 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.57 per Share for Third Quarter 2024 Base Dividend of $0.43 and Supplemental Dividend of $0.14 Per Share EVANSTON, Ill., August 1, 2024 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing s

Incremental Commitment Agreement, dated as of July 25, 2024, by and among Fidus Investment Corporation, as borrower, the subsidiary guarantors party thereto, the increasing lenders party thereto, and ING Capital LLC, as administrative agent.

Exhibit 10.1 INCREMENTAL COMMITMENT AGREEMENT dated as of July 25, 2024, made by FIDUS INVESTMENT CORPORATION, as Borrower and THE SUBSIDIARY GUARANTORS PARTY HERETO each as a Subsidiary Guarantor and THE INCREASING LENDERS PARTY HERETO, each as an Increasing Lender and ING CAPITAL LLC as Administrative Agent relating to the AMENDED & RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT dated as of

Entry into a Material Definitive Agreement, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 25, 2024 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Commiss

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 12, 2024 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commiss

Filed Pursuant to Rule 424(b)(2) Registration No. 333-277540 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 8, 2024) Up to $300,000,000 FIDUS INVESTMENT CORPORATION Common stock We are an externally managed, closed-end, non-diversified management inv

Filed Pursuant to Rule 424(b)(2) Registration No. 333-277540 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 8, 2024) Up to $300,000,000 FIDUS INVESTMENT CORPORATION Common stock We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “

1

CORRESP Eversheds Sutherland (US) LLP 700 Sixth Street, NW, Suite 700 Washington, DC 20001-3980 May 8, 2024 VIA EDGAR Samantha A.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inve

FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2024 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.59 per Share for Second Quarter 2024 Base Dividend of $0.43 and Supplemental Dividend of $0.16 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2024 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.59 per Share for Second Quarter 2024 Base Dividend of $0.43 and Supplemental Dividend of $0.16 Per Share EVANSTON, Ill., May 2, 2024 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solu

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 2, 2024 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒          Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement.

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 29, 2024 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Com

Amendment No. 2, dated February 29, 2024, to Equity Distribution Agreement by and among Fidus Investment Corporation and Fidus Investment Advisors, LLC, on the one hand, and Raymond James & Associates, Inc. and B. Riley Securities, Inc., on the other hand

Exhibit 10.1 FIDUS INVESTMENT CORPORATION (a Maryland Corporation) Common Stock, Par Value $0.001 Per Share AMENDMENT NO. 2 TO EQUITY DISTRIBUTION AGREEMENT Dated as of February 29, 2024 This Amendment No. 2, dated February 29, 2024 (the “Amendment”), is to the Equity Distribution Agreement, dated November 10, 2022, as amended by Amendment No. 1 to Equity Distribution Agreement, dated August 11, 2

FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2023 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.65 per Share for First Quarter 2024 Base Dividend of $0.43 and Supplemental Dividend of $0.22 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2023 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.65 per Share for First Quarter 2024 Base Dividend of $0.43 and Supplemental Dividend of $0.22 Per Share EVANSTON, Ill., February 29, 2024 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and e

Up to $300,000,000 Common Stock Supplement No. 6, dated February 29, 2024 Prospectus, dated May 3, 2021 Prospectus Supplement, dated November 10, 2022

Filed Pursuant to Rule 424(b)(3) File No. 333-253525 Up to $300,000,000 Common Stock Supplement No. 6, dated February 29, 2024 to Prospectus, dated May 3, 2021 Prospectus Supplement, dated November 10, 2022 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated November 10, 2022 (the “ATM Prospectus Supplement”), and the accompanying prosp

List of Subsidiaries.*

Exhibit 21.1 SUBSIDIARIES OF FIDUS INVESTMENT CORPORATION Name Jurisdiction FCDS Corp. Delaware FCMH Equity Corp. Delaware Fidus Capital GP, LLC Delaware Fidus Investment GP, LLC Delaware Fidus Mezzanine Capital, L.P. Delaware Fidus Mezzanine Capital II, L.P. Delaware Fidus Mezzanine Capital III, L.P. Delaware Fidus Mezzanine Capital IV, L.P. Delaware Fidus Investment Holdings, Inc. Delaware

Compensation Recoupment Policy.*

Exhibit 97.1 FIDUS INVESTMENT CORPORATION COMPENSATION RECOUPMENT POLICY The Board of Directors of Fidus Investment Corporation has adopted the following Compensation Recoupment Policy effective as of December 1, 2023. Purpose It is the intention of the Board that this Compensation Recoupment Policy be interpreted and administered in a manner consistent with applicable laws and regulations and Sec

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 29, 2024 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Em

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One)  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00861 FIDUS INVESTME

Insider Trading Policy and Procedures included in Joint Code of Ethics (attached as Exhibit 14.1 hereto).

Exhibit 14.1 JOINT CODE OF ETHICS FOR FIDUS INVESTMENT CORPORATION, FIDUS MEZZANINE CAPITAL, L.P., AND FIDUS INVESTMENT ADVISORS, LLC SECTION I - STATEMENT OF GENERAL FIDUCIARY PRINCIPLES This Joint Code of Ethics (the “Code”) has been adopted by each of Fidus Investment Corporation (the “Corporation”), Fidus Mezzanine Capital, L.P. (the “Fund”) and Fidus Investment Advisors, LLC, the Corporation’

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒          Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement.

FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2024 DIVIDEND

Exhibit 99.1 FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2024 DIVIDEND EVANSTON, Ill., February 14, 2024– Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”) today announced that its Board of Directors on February 13, 2024 declared a base dividend of $0.43 per share and a supplemental dividend of $0.22 per share for the first quarter of 2024. The Company’s dividends will

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 13, 2024 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Em

Up to $150,000,000 Common Stock Supplement No. 5, dated November 2, 2023 Prospectus, dated May 3, 2021 Prospectus Supplement, dated November 10, 2022

Filed Pursuant to Rule 424(b)(3) File No. 333-253525 Up to $150,000,000 Common Stock Supplement No. 5, dated November 2, 2023 to Prospectus, dated May 3, 2021 Prospectus Supplement, dated November 10, 2022 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated November 10, 2022 (the “ATM Prospectus Supplement”) and the accompanying prospec

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 ☐ TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 2, 2023 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emp

FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2023 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.80 Per Share for Fourth Quarter 2023 Base Dividend of $0.43, Supplemental Dividend of $0.27, and Special Dividend of $0.10 P

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2023 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.80 Per Share for Fourth Quarter 2023 Base Dividend of $0.43, Supplemental Dividend of $0.27, and Special Dividend of $0.10 Per Share EVANSTON, Ill., November 2, 2023 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customiz

Amendment No. 1, dated August 11, 2023, to Equity Distribution Agreement by and among Fidus Investment Corporation and Fidus Investment Advisors, LLC, on the one hand, and Raymond James & Associates, Inc. and B. Riley Securities, Inc., on the other hand

EX-10.1 Exhibit 10.1 FIDUS INVESTMENT CORPORATION (a Maryland Corporation) Common Stock, Par Value $0.001 Per Share AMENDMENT NO. 1 TO EQUITY DISTRIBUTION AGREEMENT Dated as of August 11, 2023 This Amendment No. 1, dated August 11, 2023 (the “Amendment”), is to the Equity Distribution Agreement, dated November 10, 2022 (the “Equity Distribution Agreement”), by and among Fidus Investment Corporatio

Up to $150,000,000 Common Stock Supplement No. 4, dated August 11, 2023 Prospectus, dated May 3, 2021 Prospectus Supplement, dated November 10, 2022

Filed Pursuant to Rule 424(b)(3) File No. 333-253525 Up to $150,000,000 Common Stock Supplement No. 4, dated August 11, 2023 to Prospectus, dated May 3, 2021 Prospectus Supplement, dated November 10, 2022 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated November 10, 2022 (the “ATM Prospectus Supplement”), and the accompanying prospec

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 11, 2023 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Commi

Up to $50,000,000 Common Stock Supplement No. 3, dated August 4, 2023 Prospectus, dated May 3, 2021 Prospectus Supplement, dated November 10, 2022

Filed Pursuant to Rule 424(b)(3) File No. 333-253525 Up to $50,000,000 Common Stock Supplement No. 3, dated August 4, 2023 to Prospectus, dated May 3, 2021 Prospectus Supplement, dated November 10, 2022 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated November 10, 2022 (the “ATM Prospectus Supplement”) and the accompanying prospectus

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 ☐ TRANSITION REPORT PU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inves

FIDUS INVESTMENT CORPORATION ANNOUNCES Second QUARTER 2023 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.72 Per Share for Third Quarter 2023 Base Dividend of $0.41, Supplemental Dividend of $0.21, and Special Dividend of $0.10 P

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Second QUARTER 2023 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.72 Per Share for Third Quarter 2023 Base Dividend of $0.41, Supplemental Dividend of $0.21, and Special Dividend of $0.10 Per Share EVANSTON, Ill., August 3, 2023 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 3, 2023 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emplo

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 8, 2023 Fidus Investment Cor

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 8, 2023 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commissi

Up to $50,000,000 Common Stock Supplement No. 2, dated May 8, 2023 Prospectus, dated May 3, 2021 and Prospectus Supplement, dated November 10, 2022

Filed Pursuant to Rule 424(b)(3) File No. 333-253525 Up to $50,000,000 Common Stock Supplement No. 2, dated May 8, 2023 to Prospectus, dated May 3, 2021 and Prospectus Supplement, dated November 10, 2022 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated November 10, 2022 (the “ATM Prospectus Supplement”) and the accompanying prospectu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 4, 2023 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 ☐ TRANSITION REPORT P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inve

FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2023 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.70 Per Share for Second Quarter 2023 Base Dividend of $0.41, Supplemental Dividend of $0.19, and Special Dividend of $0.10 P

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2023 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.70 Per Share for Second Quarter 2023 Base Dividend of $0.41, Supplemental Dividend of $0.19, and Special Dividend of $0.10 Per Share EVANSTON, Ill., May 4, 2023 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized de

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement.

[Eversheds Sutherland (US) LLP Letterhead]

[Eversheds Sutherland (US) LLP Letterhead] March 17, 2023 VIA EDGAR Bernard Nolan, Esq.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 2, 2023 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Employ

Up to $50,000,000 Common Stock Supplement No. 1, dated March 2, 2023 Prospectus, dated May 3, 2021 and Prospectus Supplement, dated November 10, 2022

Filed Pursuant to Rule 424(b)(3) File No. 333-253525 Up to $50,000,000 Common Stock Supplement No. 1, dated March 2, 2023 to Prospectus, dated May 3, 2021 and Prospectus Supplement, dated November 10, 2022 This supplement amends, supplements or modifies certain information contained in the prospectus supplement, dated November 10, 2022 (the “ATM Prospectus Supplement”) and the accompany prospectus

FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2022 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.66 per Share for First Quarter 2023 Base Dividend Increased to $0.41 Per Share, Reflecting Improved Earnings

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2022 FINANCIAL RESULTS Board of Directors Declared Total Dividends of $0.66 per Share for First Quarter 2023 Base Dividend Increased to $0.41 Per Share, Reflecting Improved Earnings Power of Fidus' Portfolio EVANSTON, Ill., March 2, 2023 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provid

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

PRE 14A 1 d408758dpre14a.htm PRE 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ P

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One)  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00861 FIDUS INVESTME

List of Subsidiaries.*

Exhibit 21.1 SUBSIDIARIES OF FIDUS INVESTMENT CORPORATION Name Jurisdiction FCDS Corp. Delaware FCMH Equity Corp. Delaware Fidus Capital GP, LLC Delaware Fidus Investment GP, LLC Delaware Fidus Mezzanine Capital, L.P. Delaware Fidus Mezzanine Capital II, L.P. Delaware Fidus Mezzanine Capital III, L.P. Delaware Fidus Investment Holdings, Inc. Delaware

DESCRIPTION OF SECURITIES

Exhibit 4.8 DESCRIPTION OF SECURITIES As of December 31, 2022, Fidus Investment Corporation (“we,” “our,” “us,” or the “Company”) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): its common stock, par value $0.001 per share (“common stock”). The following description of the common stock is as of December 31, 2022 and b

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 15, 2023 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Em

FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2023 DIVIDEND

Exhibit 99.1 FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2023 DIVIDEND EVANSTON, Ill., February 21, 2023– Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”) announced that its Board of Directors on February 15, 2023 declared a base dividend of $0.41 per share, a supplemental dividend of $0.15 per share, and a special dividend of $0.10 per share. The Company’s dividends w

FIDUS INVESTMENT CORPORATION ANNOUNCES DEEMED DISTRIBUTION OF $1.65 PER SHARE AND U.S. FEDERAL INCOME TAX TREATMENT OF 2022 DIVIDENDS

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES DEEMED DISTRIBUTION OF $1.65 PER SHARE AND U.S. FEDERAL INCOME TAX TREATMENT OF 2022 DIVIDENDS EVANSTON, Ill., January 31, 2023 – Fidus Investment Corporation (NASDAQ: FDUS) (“Fidus” or the “Company”), provider of customized debt and equity financing solutions, primarily to lower middle-market companies based in the United States, announced today

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): January 31, 2023 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emp

Equity Distribution Agreement, dated November 10, 2022, by and among Fidus Investment Corporation, Fidus Investment Advisors, LLC, on the one hand, and Raymond James & Associates, Inc. and B. Riley Securities, Inc. on the other hand (Filed as Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission on November 10, 2022 and incorporated herein by reference).

Exhibit 10.1 FIDUS INVESTMENT CORPORATION (a Maryland Corporation) Common Stock, Par Value $0.001 Per Share EQUITY DISTRIBUTION AGREEMENT Dated as of November 10, 2022 TABLE OF CONTENTS SECTION PAGE 1. Representations and Warranties by the Company 2 2. Representations and Warranties of the Adviser 11 3. Placements 13 4. Sale of Placement Securities by the Placement Agent 14 5. Suspension of Sales

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 10, 2022 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State or Other Jurisdiction of Incorporation) (Com

FIDUS INVESTMENT CORPORATION Common stock

Filed Pursuant to Rule 424(b)(2) Registration No. 333-253525 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 3, 2021) $50,000,000 FIDUS INVESTMENT CORPORATION Common stock We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company (?BDC?) under the Investment Company Act of 1940, as amended (the ?1940 Ac

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 3, 2022 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emp

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 ☐ TRANSITION REPO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus

FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2022 FINANCIAL RESULTS Base Dividend of $0.36 and Supplemental Dividend of $0.15 Per Share for Fourth Quarter 2022 Board of Directors Declared Special Dividend of $0.10 Per Share for Fourth Quarter

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2022 FINANCIAL RESULTS Base Dividend of $0.36 and Supplemental Dividend of $0.15 Per Share for Fourth Quarter 2022 Board of Directors Declared Special Dividend of $0.10 Per Share for Fourth Quarter 2022 EVANSTON, Ill., November 3, 2022 ? Fidus Investment Corporation (NASDAQ:FDUS) (?Fidus? or the ?Company?), a provider of customized

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 17, 2022 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation) (Commi

Amendment No. 2, dated as of August 17, 2022, to the Amended and Restated Senior Secured Revolving Credit Agreement, by and among the Company, the Lenders, and ING Capital LLC, as administrative agent for the Lenders (Filed as Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission on August 23, 2022 and incorporated herein by reference).

Exhibit 10.1 AMENDMENT NO. 2 TO AMENDED & RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT This AMENDMENT NO. 2 TO AMENDED & RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT, dated as of August 17, 2022 (this ?Amendment?), is made with respect to the Amended and Restated Senior Secured Revolving Credit Agreement, dated as of April 24, 2019 (as amended , restated, supplemented or otherwise modi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 ☐ TRANSITION REPORT PU

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inves

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 4, 2022 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emplo

FIDUS INVESTMENT CORPORATION ANNOUNCES Second QUARTER 2022 FINANCIAL RESULTS Base Dividend of $0.36 Per Share Declared for Third and Fourth Quarter 2022 Board of Directors Declared Supplemental Dividend of $0.07 Per Share for Third Quarter 2022 Board

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Second QUARTER 2022 FINANCIAL RESULTS Base Dividend of $0.36 Per Share Declared for Third and Fourth Quarter 2022 Board of Directors Declared Supplemental Dividend of $0.07 Per Share for Third Quarter 2022 Board of Directors Declared Supplemental Dividend of at least $0.07 Per Share for Fourth Quarter 2022 EVANSTON, Ill., August 4, 2022 ? Fidus I

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 29, 2022 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commiss

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 29, 2022 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commiss

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 9, 2022 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commissi

FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2022 FINANCIAL RESULTS Base Dividend of $0.36 Per Share Declared for Second Quarter 2022 Board of Directors Declared Supplemental Dividend of $0.07 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES First QUARTER 2022 FINANCIAL RESULTS Base Dividend of $0.36 Per Share Declared for Second Quarter 2022 Board of Directors Declared Supplemental Dividend of $0.07 Per Share EVANSTON, Ill., May 5, 2022 ? Fidus Investment Corporation (NASDAQ:FDUS) (?Fidus? or the ?Company?), a provider of customized debt and equity financing solutions, primarily to

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus Inve

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 5, 2022 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Employer

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy State

[Letterhead of Eversheds Sutherland (US) LLP] March 18, 2022

[Letterhead of Eversheds Sutherland (US) LLP] March 18, 2022 VIA EDGAR Mr. John Grzeskiewicz Division of Investment Management U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Re: Fidus Investment Corporation Preliminary Proxy Statement on Schedule 14A filed March 3, 2022 File No. 814-00861 Dear Mr. Grzeskiewicz: On behalf of Fidus Investment Corporation (the “Compan

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement.

List of Subsidiaries.*

Exhibit 21.1 SUBSIDIARIES OF FIDUS INVESTMENT CORPORATION Name Jurisdiction BBRSS Blocker Corp. Delaware FCDS Corp. Delaware FCMH Equity Corp. Delaware Fidus Capital GP, LLC Delaware Fidus Investment GP, LLC Delaware Fidus Mezzanine Capital, L.P. Delaware Fidus Mezzanine Capital II, L.P. Delaware Fidus Mezzanine Capital III, L.P. Delaware Fidus Investment Holdings, Inc. Delaware

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement.

Description of Securities (Filed as Exhibit 4.8 to the Registrant’s Annual Report on Form 10-K filed with the U.S. Securities and Exchange Commission on March 3, 2022 and incorporated herein by reference).

Exhibit 4.8 DESCRIPTION OF SECURITIES As of December 31, 2021, Fidus Investment Corporation (?we,? ?our,? ?us,? or the ?Company?) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the ?Exchange Act?): its common stock, par value $0.001 per share (?common stock?). The following description of the common stock is as of December 31, 2021 and b

FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2021 FINANCIAL RESULTS Base Dividend of $0.36 Per Share Declared for First Quarter 2022 Board of Directors Declared Supplemental Dividend of $0.17 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Fourth QUARTER AND FULL YEAR 2021 FINANCIAL RESULTS Base Dividend of $0.36 Per Share Declared for First Quarter 2022 Board of Directors Declared Supplemental Dividend of $0.17 Per Share EVANSTON, Ill., March 3, 2022 ? Fidus Investment Corporation (NASDAQ:FDUS) (?Fidus? or the ?Company?), a provider of customized debt and equity financing solution

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00861 FIDUS INVESTME

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 3, 2022 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Employ

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 15, 2022 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Com

FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2022 DIVIDEND

Exhibit 99.1 FIDUS INVESTMENT CORPORATION DECLARES FIRST QUARTER 2022 DIVIDEND EVANSTON, Ill., February 16, 2022 ? Fidus Investment Corporation (NASDAQ:FDUS) (?Fidus? or the ?Company?) today announced that its Board of Directors on February 15, 2022 declared a base dividend of $0.36 per share and a supplemental dividend of $0.17 per share using a revised formula for the first quarter of 2022. The

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814-00861 Fidus

FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2021 FINANCIAL RESULTS Base Dividend of $0.32 and Supplemental Dividend of $0.04 Declared for Third Quarter Board of Directors Declared Special Dividend of $0.05 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES Third QUARTER 2021 FINANCIAL RESULTS Base Dividend of $0.32 and Supplemental Dividend of $0.04 Declared for Third Quarter Board of Directors Declared Special Dividend of $0.05 Per Share EVANSTON, Ill., November 4, 2021 ? Fidus Investment Corporation (NASDAQ:FDUS) (?Fidus? or the ?Company?), a provider of customized debt and equity financing solut

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): November 4, 2021 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction (Commission (I.R.S. Emp

Fifth Supplemental Indenture, dated as of October 8, 2021, between Fidus Investment Corporation and U.S. Bank National Association, as trustee.

Exhibit 4.1 FIFTH SUPPLEMENTAL INDENTURE between FIDUS INVESTMENT CORPORATION and U.S. BANK NATIONAL ASSOCIATION, as Trustee Dated as of October 8, 2021 THIS FIFTH SUPPLEMENTAL INDENTURE (this ?Fifth Supplemental Indenture?), dated as of October 8, 2021, is between Fidus Investment Corporation, a Maryland corporation (the ?Company?), and U.S. Bank National Association, as trustee (the ?Trustee?).

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 8, 2021 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation) (Commi

3.50% Notes due 2026

Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No. 333-253525 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 3, 2021) $125,000,000 3.50% Notes due 2026 We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company (?BDC?) under the Investment Company Act of 1940, as amended (the ?1940 Act?

Underwriting Agreement, dated as of October 1, 2021, by and among Fidus Investment Corporation, Fidus Investment Advisors, LLC and Raymond James & Associates, Inc.

Exhibit 1.1 Execution Version FIDUS INVESTMENT CORPORATION $125,000,000 3.50% Notes due 2026 UNDERWRITING AGREEMENT October 1, 2021 Raymond James & Associates, Inc. As representative of the several underwriters named in Exhibit A c/o Raymond James & Associates, Inc. 880 Carillon Parkway St. Petersburg, Florida 33716 Ladies and Gentlemen: Fidus Investment Corporation, a Maryland corporation (the ?C

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 1, 2021 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation) (Commi

NOTICE OF REDEMPTION TO THE HOLDERS OF THE 5.375% Notes due 2024 of Fidus Investment Corporation (CUSIP No. 316500 404)* Redemption Date: November 2, 2021

Exhibit 99.2 NOTICE OF REDEMPTION TO THE HOLDERS OF THE 5.375% Notes due 2024 of Fidus Investment Corporation (CUSIP No. 316500 404)* Redemption Date: November 2, 2021 NOTICE IS HEREBY GIVEN, pursuant to Section 1104 of the Indenture dated as of February 2, 2018 (the ?Base Indenture?), between Fidus Investment Corporation, a Maryland corporation (the ?Company?), and U.S. Bank National Association

NOTICE OF REDEMPTION TO THE HOLDERS OF THE 6.000% Notes due 2024 of Fidus Investment Corporation (CUSIP No. 316500 305)* Redemption Date: November 2, 2021

Exhibit 99.1 NOTICE OF REDEMPTION TO THE HOLDERS OF THE 6.000% Notes due 2024 of Fidus Investment Corporation (CUSIP No. 316500 305)* Redemption Date: November 2, 2021 NOTICE IS HEREBY GIVEN, pursuant to Section 1104 of the Indenture dated as of February 2, 2018 (the ?Base Indenture?), between Fidus Investment Corporation, a Maryland corporation (the ?Company?), and U.S. Bank National Association

FIDUS INVESTMENT CORPORATION 3.50% Notes due 2026 PRICING TERM SHEET October 1, 2021

Filed Pursuant to Rule 433 Issuer Free Writing Prospectus dated October 1, 2021 Relating to Preliminary Prospectus Supplement dated October 1, 2021 and Prospectus dated May 3, 2021 Registration No.

SUBJECT TO COMPLETION, DATED OCTOBER 1, 2021

Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No. 333-223350 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has been filed with and declared effective by the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an offer

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 5, 2021 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commis

FIDUS INVESTMENT CORPORATION ANNOUNCES SECOND QUARTER 2021 FINANCIAL RESULTS Base Dividend of $0.32 and Supplemental Dividend of $0.06 Declared for Third Quarter Board of Directors Declared Special Dividend of $0.04 Per Share

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES SECOND QUARTER 2021 FINANCIAL RESULTS Base Dividend of $0.32 and Supplemental Dividend of $0.06 Declared for Third Quarter Board of Directors Declared Special Dividend of $0.04 Per Share EVANSTON, Ill., August 5, 2021 ? Fidus Investment Corporation (NASDAQ:FDUS) (?Fidus? or the ?Company?), a provider of customized debt and equity financing soluti

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 814

Form of Indemnification Agreement between Fidus Investment Corporation and each officer and director of Fidus Investment Corporation (Filed as Exhibit 10.1 of the Registrant’s quarterly report on Form 10-Q, filed with the U.S. Securities and Exchange Commission on August 5, 2021).

Exhibit 10.1 INDEMNIFICATION AGREEMENT THIS INDEMNIFICATION AGREEMENT (this ?Agreement?) is made and entered into as of August , 2021 (the ?Effective Date?), by and between Fidus Investment Corporation, a Maryland corporation (the ?Company?), and (?Indemnitee?). For the avoidance of doubt, in addition to memorializing the terms of the Indemnitee?s indemnification rights, this Agreement is also int

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): July 14, 2021 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commiss

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of

- DEF 14A

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement.

[Letterhead of Eversheds Sutherland (US) LLP] May 7, 2021

[Letterhead of Eversheds Sutherland (US) LLP] May 7, 2021 VIA EDGAR Ms. Samantha Brutlag Division of Investment Management U.S. Securities and Exchange Commission 100 F Street, N.E. Washington, DC 20549 Re: Fidus Investment Corporation Preliminary Proxy Statement on Schedule 14A filed April 16, 2021 File No. 814-00861 Dear Ms. Brutlag: On behalf of Fidus Investment Corporation (the ?Company?), set

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 81

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 6, 2021 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commissio

FIDUS INVESTMENT CORPORATION ANNOUNCES FIRST QUARTER 2021 FINANCIAL RESULTS Base Dividend of $0.31 and Supplemental Dividend of $0.08 Per Share Declared for Second Quarter 2021

Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES FIRST QUARTER 2021 FINANCIAL RESULTS Base Dividend of $0.31 and Supplemental Dividend of $0.08 Per Share Declared for Second Quarter 2021 EVANSTON, Ill., May 6, 2021 ? Fidus Investment Corporation (NASDAQ:FDUS) (?Fidus? or the ?Company?), a provider of customized debt and equity financing solutions, primarily to lower middle-market companies base

[Letterhead of Eversheds Sutherland (US) LLP] April 30, 2021

[Letterhead of Eversheds Sutherland (US) LLP] April 30, 2021 VIA EDGAR Christina DiAngelo Fettig, Senior Staff Accountant Division of Investment Management U.

- PRE 14A

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement.

Annual Report - 10-K

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00

Exhibit 4.12

Exhibit 4.12 DESCRIPTION OF SECURITIES As of December 31, 2020, Fidus Investment Corporation (?we,? ?our,? ?us,? or the ?Company?) has four classes of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the ?Exchange Act?): (i) its common stock, par value $0.001 per share (?common stock?); (ii) its 5.875% Notes due 2023 (the ?2023 Notes?); (iii) its 6.000% No

List of Subsidiaries.*

Exhibit 21.1 SUBSIDIARIES OF FIDUS INVESTMENT CORPORATION Name Jurisdiction BBRSS Blocker Corp. Delaware FCDS Corp. Delaware FCMH Equity Corp. Delaware Fidus Capital GP, LLC Delaware Fidus Investment GP, LLC Delaware Fidus Mezzanine Capital, L.P. Delaware Fidus Mezzanine Capital II, L.P. Delaware Fidus Mezzanine Capital III, L.P. Delaware Fidus Investment Holdings, Inc. Delaware

FIDUS INVESTMENT CORPORATION ANNOUNCES FOURTH QUARTER AND FULL YEAR 2020 FINANCIAL RESULTS Regular Quarterly Dividend of $0.31 Per Share Declared for First Quarter 2021 Board of Directors Declared Supplemental Cash Dividend of $0.07 Per Share

EX-99.1 2 d143748dex991.htm EX-99.1 Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES FOURTH QUARTER AND FULL YEAR 2020 FINANCIAL RESULTS Regular Quarterly Dividend of $0.31 Per Share Declared for First Quarter 2021 Board of Directors Declared Supplemental Cash Dividend of $0.07 Per Share EVANSTON, Ill., February 25, 2021 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 25, 2021 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Com

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): December 23, 2020 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation)

Other Events - 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 23, 2020 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation)

Fourth Supplemental Indenture dated as of December 23, 2020 between Fidus Investment Corporation and U.S. Bank National Association, as trustee (Filed as Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed with the U.S. Securities and Exchange Commission on December 23, 2020 and incorporated herein by reference).

EX-4.1 Exhibit 4.1 FOURTH SUPPLEMENTAL INDENTURE between FIDUS INVESTMENT CORPORATION and U.S. BANK NATIONAL ASSOCIATION, as Trustee Dated as of December 23, 2020 THIS FOURTH SUPPLEMENTAL INDENTURE (this “Fourth Supplemental Indenture”), dated as of December 23, 2020, is between Fidus Investment Corporation, a Maryland corporation (the “Company”), and U.S. Bank National Association, as trustee (th

Underwriting Agreement, dated as of December 16, 2020, by and among Fidus Investment Corporation, Fidus Investment Advisors, LLC and Raymond James & Associates, Inc.

EX-1.1 Exhibit 1.1 FIDUS INVESTMENT CORPORATION $125,000,000 4.75% Notes due 2026 UNDERWRITING AGREEMENT December 16, 2020 Raymond James & Associates, Inc. As representative of the several underwriters named in Exhibit A c/o Raymond James & Associates, Inc. 880 Carillon Parkway St. Petersburg, Florida 33716 Ladies and Gentlemen: Fidus Investment Corporation, a Maryland corporation (the “Company”),

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 16, 2020 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation)

Other Events - 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 17, 2020 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation)

4.75% Notes due 2026

424B2 Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No. 333-223350 PROSPECTUS SUPPLEMENT (To Prospectus Dated May 1, 2019) $125,000,000 4.75% Notes due 2026 We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (the “194

SUBJECT TO COMPLETION, DATED DECEMBER 16, 2020

424B2 Table of Contents Filed Pursuant to Rule 424(b)(2) Registration No. 333-223350 The information in this preliminary prospectus supplement is not complete and may be changed. A registration statement relating to these securities has been filed with and declared effective by the Securities and Exchange Commission. This preliminary prospectus supplement and the accompanying prospectus are not an

FIDUS INVESTMENT CORPORATION 4.75% Notes due 2026 PRICING TERM SHEET December 16, 2020

FWP Filed Pursuant to Rule 433 Issuer Free Writing Prospectus dated December 16, 2020 Relating to Preliminary Prospectus Supplement dated December 16, 2020 and Prospectus dated May 1, 2019 Registration No.

FIDUS INVESTMENT CORPORATION ANNOUNCES THIRD QUARTER 2020 FINANCIAL RESULTS Regular Quarterly Dividend of $0.30 Per Share Declared for Fourth Quarter 2020 Board of Directors Declared Supplemental Cash Dividend of $0.04 Per Share

EX-99.1 2 d99379dex991.htm EX-99.1 EXHIBIT 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES THIRD QUARTER 2020 FINANCIAL RESULTS Regular Quarterly Dividend of $0.30 Per Share Declared for Fourth Quarter 2020 Board of Directors Declared Supplemental Cash Dividend of $0.04 Per Share EVANSTON, Ill., October 29, 2020 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of cus

Quarterly Report - 10-Q

10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 29, 2020 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 6, 2020 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Co

Quarterly Report - 10-Q

10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

FIDUS INVESTMENT CORPORATION ANNOUNCES SECOND QUARTER 2020 FINANCIAL RESULTS Regular Quarterly Dividend of $0.30 Per Share Declared for Third Quarter 2020

EX-99.1 Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES SECOND QUARTER 2020 FINANCIAL RESULTS Regular Quarterly Dividend of $0.30 Per Share Declared for Third Quarter 2020 EVANSTON, Ill., August 6, 2020 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solutions, primarily to lower middle-market companies based in the Un

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): June 26, 2020 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation) (Com

Amendment No. 1, dated June 26, 2020, to the Amended & Restated Senior Secured Revolving Credit Agreement dated April 24, 2019, by and among the Company, as borrower, the subsidiary guarantors party thereto, ING Capital LLC, as administrative agent, and the lenders party thereto (Filed as Exhibit 10.1 to the Registrant’s current report on Form 8-K filed with the U.S. Securities and Exchange Commission on June 29, 2020 and incorporated herein by reference).

EX-10.1 2 d15014dex101.htm EX-10.1 Exhibit 10.1 Execution Version AMENDMENT NO. 1 TO AMENDED & RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT This AMENDMENT NO. 1 TO AMENDED & RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT, dated as of June 26, 2020 (this “Amendment”), is made with respect to the Amended and Restated Senior Secured Revolving Credit Agreement, dated as of April 24, 2019 (as

Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 4, 2020 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Comm

- DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, fo

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): April 30, 2020 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Co

FIDUS INVESTMENT CORPORATION ANNOUNCES FIRST QUARTER 2020 FINANCIAL RESULTS Regular Quarterly Dividend of $0.30 Per Share Declared for Second Quarter 2020

EX-99.1 Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES FIRST QUARTER 2020 FINANCIAL RESULTS Regular Quarterly Dividend of $0.30 Per Share Declared for Second Quarter 2020 EVANSTON, Ill., April 30, 2020 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solutions, primarily to lower middle-market companies based in the Un

Quarterly Report - 10-Q

10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Schedule 14A

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement.

-

CORRESP Eversheds Sutherland (US) LLP 700 Sixth Street, NW, Suite 700 Washington, DC 20001-3980 D: +1 202.

FDUS / Fidus Investment Corporation POS EX - - POS EX

POS EX Table of Contents Securities Act File No. 333-223350 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-2 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ☒ Pre-Effective Amendment No. ☐ Post-Effective Amendment No. 4 ☒ FIDUS INVESTMENT CORPORATION (Exact Name of Registrant as Specified in Charter) 1603 Orrington Avenue, Suite 1005 Evanston, Illinois 60201

Consent of Independent Registered Public Accounting Firm

EX-99.N.3 Exhibit (n)(3) Consent of Independent Registered Public Accounting Firm We consent to the incorporation by reference in Registration Statement (No. 333-223350) on Form N-2 of Fidus Investment Corporation of our reports dated February 27, 2020, relating to the consolidated statements of assets and liabilities, including the consolidated schedules of investments, as of December 31, 2019 an

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 27, 2020 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation)

List of Subsidiaries.*

EX-21.1 Exhibit 21.1 SUBSIDIARIES OF FIDUS INVESTMENT CORPORATION Name Jurisdiction BBRSS Blocker Corp. Delaware FCDS Corp. Delaware FCMGI, Inc. Delaware FCMH Equity Corp. Delaware Fidus Investment GP, LLC Delaware Fidus Mezzanine Capital, L.P. Delaware Fidus Mezzanine Capital II, L.P. Delaware Fidus Mezzanine Capital III, L.P. Delaware Fidus Investment Holdings, Inc. Delaware

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement.

FDUS / Fidus Investment Corporation 10-K - Annual Report - 10-K

10-K Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

FIDUS INVESTMENT CORPORATION ANNOUNCES FOURTH QUARTER AND FULL YEAR 2019 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for First Quarter 2020

EX-99.1 Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES FOURTH QUARTER AND FULL YEAR 2019 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for First Quarter 2020 EVANSTON, Ill., February 27, 2020 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solutions, primarily to lower middle-market companie

Description of Securities.*

EX-4.10 Exhibit 4.10 DESCRIPTION OF SECURITIES Capitalized terms used but not defined herein shall have the meaning ascribed to them in the Annual Report on Form 10-K to which this Description of Securities is an exhibit. A. Common Stock, $0.001 par value per share The authorized capital stock of Fidus Investment Corporation (the “Company,” “we,” “our” or “us”) consists of 100,000,000 shares of co

FDUS / Fidus Investment Corporation 10-Q - Quarterly Report - 10-Q

10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

FIDUS INVESTMENT CORPORATION ANNOUNCES THIRD QUARTER 2019 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for Fourth Quarter 2019 Board of Directors Declared Special Cash Dividend of $0.04 Per Share

EX-99.1 Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES THIRD QUARTER 2019 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for Fourth Quarter 2019 Board of Directors Declared Special Cash Dividend of $0.04 Per Share EVANSTON, Ill., October 31, 2019 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financin

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): October 31, 2019 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (

FDUS / Fidus Investment Corporation CERT - -

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Form 8-A

8-A12B UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) or (g) OF THE SECURITIES EXCHANGE ACT OF 1934 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 27-5017321 (Jurisdiction of Incorporation or Organization) (IRS Employer Identification No.) 1603

Underwriting Agreement dated October 10, 2019 by and among Fidus Investment Corporation, Fidus Investment Advisors, LLC and the Underwriters named therein (Filed as Exhibit 1.1 to the Registrant’s current report on Form 8-K (File No. 814-00861) filed with the Securities and Exchange Commission on October 16, 2019 and incorporated herein by reference).

EX-1.1 Exhibit 1.1 FIDUS INVESTMENT CORPORATION (a Maryland Corporation) $55,000,000 5.375% Notes due 2024 UNDERWRITING AGREEMENT October 10, 2019 Keefe, Bruyette & Woods, Inc. 787 Seventh Avenue, 5th Floor New York, New York 10019 As Representative of the several Underwriters named in Schedule A Ladies and Gentlemen: Fidus Investment Corporation, a Maryland corporation (the “Company”), and Fidus

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 10, 2019 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation) (

Third Supplemental Indenture dated as of October 16, 2019, between Fidus Investment Corporation and U.S. Bank National Association, as trustee (Filed as Exhibit 4.2 to the Registrant’s current report on Form 8-K filed with the U.S. Securities and Exchange Commission on October 16, 2019 and incorporated herein by reference).

EX-4.2 Exhibit 4.2 THIRD SUPPLEMENTAL INDENTURE between FIDUS INVESTMENT CORPORATION and U.S. BANK NATIONAL ASSOCIATION, as Trustee Dated as of October 16, 2019 THIS THIRD SUPPLEMENTAL INDENTURE (this “Third Supplemental Indenture”), dated as of October 16, 2019, is between Fidus Investment Corporation, a Maryland corporation (the “Company”), and U.S. Bank National Association, as trustee (the “Tr

Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 10, 2019 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation) (

FIDUS INVESTMENT CORPORATION ANNOUNCES SECOND QUARTER 2019 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for Third Quarter 2019

EX-99.1 Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES SECOND QUARTER 2019 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for Third Quarter 2019 EVANSTON, Ill., August 1, 2019 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solutions, primarily to lower middle-market companies based in the Un

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): August 1, 2019 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Co

FDUS / Fidus Investment Corporation 10-Q - Quarterly Report - 10-Q

10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Submission of Matters to a Vote of Security Holders

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): June 19, 2019 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Com

FDUS / Fidus Investment Corporation DEFA14A - - DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, fo

FDUS / Fidus Investment Corporation DEFA14A - - DEFA14A

DEFA14A SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to Section 240.

FDUS / Fidus Investment Corporation DEFA14A DEFA14A

DEFA14A SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Materials ☐ Soliciting Material Pursuant to Section 240.

FIDUS INVESTMENT CORPORATION ANNOUNCES FIRST QUARTER 2019 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for Second Quarter 2019

EX-99.1 Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES FIRST QUARTER 2019 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for Second Quarter 2019 EVANSTON, Ill., May 2, 2019 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solutions, primarily to lower middle-market companies based in the Unite

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): May 2, 2019 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Commi

FDUS / Fidus Investment Corporation 10-Q Quarterly Report 10-Q

10-Q Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Consent of Independent Registered Public Accounting Firm

EX-99.N(1) Exhibit n(1) Consent of Independent Registered Public Accounting Firm We consent to the use in this Post-Effective Amendment No. 3 to the Registration Statement (No. 333-223350) on Form N-2 of Fidus Investment Corporation and Subsidiaries (collectively, the Company) of our reports dated February 28, 2019, relating to the consolidated financial statements, the senior securities table and

Report of Independent Registered Public Accounting Firm

EX-99.N(2) Exhibit (n)(2) Report of Independent Registered Public Accounting Firm Board of Directors and Stockholders Fidus Investment Corporation and Subsidiaries Our audits of the consolidated financial statements and internal control over financial reporting referred to in our report dated February 28, 2019, (appearing in the accompanying registration statement on Form N-2) also included an aud

FDUS / Fidus Investment Corporation POS 8C POS 8C

POS 8C Table of Contents Securities Act File No. 333-223350 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-2 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ☐ Pre-Effective Amendment No. ☐ Post-Effective Amendment No. 3 ☒ FIDUS INVESTMENT CORPORATION (Exact Name of Registrant as Specified in Charter) 1603 Orrington Avenue, Suite 1005 Evanston, Illinois 60201

FDUS / Fidus Investment Corporation CORRESP - -

CORRESP Eversheds Sutherland (US) LLP 700 Sixth Street, NW, Suite 700 Washington, DC 20001-3980 D: +1 202.

Amended and Restated Guarantee, Pledge and Security Agreement, dated as of April 24, 2019, by and among the Company, as borrower, the subsidiary guarantors party thereto, ING Capital LLC, as revolving administrative agent, and ING Capital LLC, as collateral agent (Filed as Exhibit 10.2 to the Registrant’s current report on Form 8-K filed with the U.S. Securities and Exchange Commission on April 24, 2019 and incorporated herein by reference).

EX-10.2 3 d737015dex102.htm EX-10.2 Exhibit 10.2 EXECUTION VERSION AMENDED AND RESTATED GUARANTEE, PLEDGE AND SECURITY AGREEMENT dated as of April 24, 2019 among FIDUS INVESTMENT CORPORATION, as Borrower, the SUBSIDIARY GUARANTORS party hereto, ING CAPITAL LLC, as Revolving Administrative Agent for the Revolving Lenders, each FINANCING AGENT and DESIGNATED INDEBTEDNESS HOLDER party hereto and ING

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Other Events

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 24, 2019 Fidus Investment Corporation (Exact Name of Registrant as Specified in its Charter) Maryland 814-00861 27-5017321 (State of Other Jurisdiction of Incorporation) (Co

Fidus Investment Corporation Announces Amendment to Revolving Credit Facility: Increased Facility Size, Improved Pricing and Extended Maturity

EX-99.1 Exhibit 99.1 Fidus Investment Corporation Announces Amendment to Revolving Credit Facility: Increased Facility Size, Improved Pricing and Extended Maturity EVANSTON, Ill., April 24, 2019 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”) today announced the closing of an Amended & Restated Senior Secured Revolving Credit Agreement (the “Credit Facility”) led by ING Cap

Amended & Restated Senior Secured Revolving Credit Agreement, dated as of April 24, 2019, by and among the Company, as borrower, the lenders party thereto, and ING Capital LLC, as administrative agent (Filed as Exhibit 10.1 to the Registrant’s current report on Form 8-K filed with the U.S. Securities and Exchange Commission on April 24, 2019 and incorporated herein by reference).

EX-10.1 Exhibit 10.1 EXECUTION VERSION AMENDED & RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT dated as of April 24, 2019 among FIDUS INVESTMENT CORPORATION, as Borrower, The Lenders Party Hereto and ING CAPITAL LLC as Administrative Agent, Arranger and Bookrunner TABLE OF CONTENTS Page ARTICLE I DEFINITIONS SECTION 1.01. Defined Terms 1 SECTION 1.02. Classification of Loans and Borrowings 32

FDUS / Fidus Investment Corporation DEF 14A

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement.

FDUS / Fidus Investment Corporation CORRESP - -

CORRESP Eversheds Sutherland (US) LLP 700 Sixth Street, NW, Suite 700 Washington, DC 20001-3980 D: +1 202.

FDUS / Fidus Investment Corporation PRE 14A

PRE 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A (RULE 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): March 7, 2019 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation) (Com

FDUS / Fidus Investment Corporation POS 8C

POS 8C Table of Contents Securities Act File No. 333-223350 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM N-2 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 ☐ Pre-Effective Amendment No. ☐ Post-Effective Amendment No. 2 ☒ FIDUS INVESTMENT CORPORATION (Exact Name of Registrant as Specified in Charter) 1603 Orrington Avenue, Suite 1005 Evanston, Illinois 60201

Report of Independent Registered Public Accounting Firm

EX-99.N(2) Exhibit (n)(2) Report of Independent Registered Public Accounting Firm Board of Directors and Stockholders Fidus Investment Corporation and Subsidiaries Our audits of the consolidated financial statements and internal control over financial reporting referred to in our report dated February 28, 2019, (appearing in the accompanying registration statement on Form N-2) also included an aud

Consent of Independent Registered Public Accounting Firm

EX-99.N(1) Exhibit n(1) Consent of Independent Registered Public Accounting Firm We consent to the use in this Post-Effective Amendment No. 2 to the Registration Statement (No. 333-223350) on Form N-2 of Fidus Investment Corporation and Subsidiaries (collectively, the Company) of our reports dated February 28, 2019, relating to the consolidated financial statements, the senior securities table and

Financial Statements and Exhibits, Results of Operations and Financial Condition

8-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): February 28, 2019 Fidus Investment Corporation (Exact name of registrant as specified in its charter) Maryland 814-00861 27-5017321 (State or other jurisdiction of incorporation)

FIDUS INVESTMENT CORPORATION ANNOUNCES FOURTH QUARTER AND FULL YEAR 2018 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for First Quarter 2019

EX-99.1 Exhibit 99.1 FIDUS INVESTMENT CORPORATION ANNOUNCES FOURTH QUARTER AND FULL YEAR 2018 FINANCIAL RESULTS Regular Quarterly Dividend of $0.39 Per Share Declared for First Quarter 2019 EVANSTON, Ill., February 28, 2019 – Fidus Investment Corporation (NASDAQ:FDUS) (“Fidus” or the “Company”), a provider of customized debt and equity financing solutions, primarily to lower middle-market companie