GTSI / Gtsi Corp - SEC-arkivering, Årsberetning, Fuldmagtserklæring

Gtsi Corp
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SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Gtsi Corp
SEC Filings (Chronological Order)
Denne side giver en komplet, kronologisk liste over SEC-arkiveringer, eksklusive ejerskabsregistreringer, som vi leverer andre steder.
February 14, 2013 SC 13G/A

GTSI / Gtsi Corp / Nantahala Capital Management, LLC - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* GTSI Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 36238K103 (CUSIP Number) December 31, 2012 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

February 11, 2013 SC 13G/A

GTSI / Gtsi Corp / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 12)* GTSI CORP (Name of Issuer) Common Stock (Title of Class of Securities) 36238K103 (CUSIP Number) December 31, 2012 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

July 2, 2012 15-12B

- FORM 15

Form 15 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number: 001-34871 GTSI Corp. (Exact name of registrant as specified in its

June 22, 2012 S-8 POS

- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8

POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 As filed with the Securities and Exchange Commission on June 22, 2012 Registration No. 333-88360 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GTSI CORP. (Exact name of registrant as specified in its charter) Delaware 54-1248422 (St

June 22, 2012 EX-3.2

AMENDED AND RESTATED GTSI CORP. ARTICLE I

Amended and Restated By-laws of GTSI Corp. Exhibit 3.2 AMENDED AND RESTATED BY-LAWS OF GTSI CORP. ARTICLE I OFFICES 1.1. Registered Office: The registered office shall be established and maintained at 2711 Centerville Road, Suite 400, Wilmington, DE 19808 and Corporation Service Company shall be the registered agent of the Corporation in charge thereof. 1.2. Other Offices: The Corporation may have

June 22, 2012 S-8 POS

- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8

POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 As filed with the Securities and Exchange Commission on June 22, 2012 Registration No. 333-44922 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GTSI CORP. (Exact name of registrant as specified in its charter) Delaware 54-1248422 (St

June 22, 2012 EX-99.1

Affiliate of UNICOM Systems, Inc. and GTSI Corp. Announce Completion of Merger

Joint Press Release Exhibit 99.1 Affiliate of UNICOM Systems, Inc. and GTSI Corp. Announce Completion of Merger FOR IMMEDIATE RELEASE: June 21, 2012 GTSI Contact: Peter Whitfield t: 703-502-2954 e: [email protected] UNICOM Contact: Russ Guzzo t: 818-838-0606 e: [email protected] Affiliate of UNICOM Systems, Inc. and GTSI Corp. Announce Completion of Merger MISSION HILLS, CA and HE

June 22, 2012 S-8 POS

- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8

POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 As filed with the Securities and Exchange Commission on June 22, 2012 Registration No. 333-143945 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GTSI CORP. (Exact name of registrant as specified in its charter) Delaware 54-1248422 (S

June 22, 2012 EX-3.1

AMENDED AND RESTATED CERTIFICATE OF INCORPORATION GTSI CORP.

Amended and Restated Certificate of Incorporation of GTSI Corp. Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF GTSI CORP. FIRST: The name of this corporation shall be: GTSI Corp. SECOND: Its registered office in the State of Delaware is to be located at 2711 Centerville Road, Suite 400, in the City of Wilmington, County of New Castle, 19808, and its registered agent at such addre

June 22, 2012 8-K

Changes in Control of Registrant, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Material Modification to Rights of Security Holders, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits, 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 18, 2012 GTSI Corp. (Exact name of registrant as specified in its charter) Delaware 001-34871 54-1248422 (State or other jurisdiction of incorporation or organization) (Commission

June 22, 2012 S-8 POS

- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8

POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 As filed with the Securities and Exchange Commission on June 22, 2012 Registration No. 333-117058 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GTSI CORP. (Exact name of registrant as specified in its charter) Delaware 54-1248422 (S

June 22, 2012 S-8 POS

- POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8

POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 As filed with the Securities and Exchange Commission on June 22, 2012 Registration No. 333-112738 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GTSI CORP. (Exact name of registrant as specified in its charter) Delaware 54-1248422 (S

June 18, 2012 SC TO-T/A

- SCHEDULE TO - AMENDMENT 3

Schedule TO - Amendment 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

June 18, 2012 EX-99.A.1.H

Affiliate of UNICOM Systems, Inc. Successfully Completes Tender Offer for Shares of GTSI Corp.

Exhibit a(1)(h) Exhibit a(1)(H) Affiliate of UNICOM Systems, Inc. Successfully Completes Tender Offer for Shares of GTSI Corp. FOR IMMEDIATE RELEASE: June 18, 2012 GTSI Contact: Peter Whitfield t: 703-502-2954 e: [email protected] Unicom Contact: Russ Guzzo t: 818-838-0606 e: [email protected] Affiliate of UNICOM Systems, Inc. Successfully Completes Tender Offer for Shares of GTSI

June 13, 2012 SC TO-T/A

- SCHEDULE TO - AMENDMENT NO 2

Schedule TO - Amendment No 2 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

June 12, 2012 SC 14D9/A

- AMENDMENT NO. 4 TO SCHEDULE 14D-9

Amendment No. 4 to Schedule 14D-9 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (RULE 14D-101) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No: 4) GTSI Corp. (Name of Subject Company) GTSI Corp. (Name of Person(s) Filing Statement) Common Stock, par value $0.005 per share (Title of Class of S

June 11, 2012 EX-99.1

GTSI ANNOUNCES EXPIRATION OF THE GO-SHOP PERIOD AND AGREEMENT IN PRINCIPLE TO SETTLE THE TRANSACTION – RELATED LITIGATION

Exhibit 99.1 GTSI ANNOUNCES EXPIRATION OF THE GO-SHOP PERIOD AND AGREEMENT IN PRINCIPLE TO SETTLE THE TRANSACTION – RELATED LITIGATION FOR IMMEDIATE RELEASE: June 11, 2012 GTSI Contact: Peter Whitfield t: 703-502-2954 e: [email protected] GTSI Announces Expiration of the Go-Shop Period and Agreement in Principle to Settle the Transaction-Related Litigation HERNDON, VA., June 11, 2012 – As p

June 11, 2012 SC 14D9/A

- AMENDMENT NO. 3 TO THE SC 14D9/A

Amendment No. 3 to the SC 14D9/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (RULE 14D-101) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No: 3) GTSI Corp. (Name of Subject Company) GTSI Corp. (Name of Person(s) Filing Statement) Common Stock, par value $0.005 per share (Title of Class of Se

June 11, 2012 SC 14D9/A

- AMENDMENT #2 TO SCHEDULE 14D-9

Amendment #2 to Schedule 14D-9 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

June 11, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - FORM 8-K

Form 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 11, 2012 GTSI Corp. Incorporated in Delaware Commission File No. 1-34871 I.R.S. Employer Identification No. 54-1248422 2553 Dulles View Drive, #100 Herndon, Virginia 201

May 31, 2012 SC TO-T/A

- AMENDMENT NO. 1 TO SCHEDULE TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

May 30, 2012 SC 14D9/A

- AMENDMENT NO. 1 TO SCHEDULE 14D-9

SC 14D9/A 1 d360632dsc14d9a.htm AMENDMENT NO. 1 TO SCHEDULE 14D-9 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (RULE 14D-101) SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No: 1) GTSI Corp. (Name of Subject Company) GTSI Corp. (Name of Person(s) Filing Statement) Common Stock, par value $0.00

May 22, 2012 EX-99.1

GTSI POSTPONES ANNUAL MEETING OF STOCKHOLDERS

EX-99.1 Exhibit 99.1 GTSI POSTPONES ANNUAL MEETING OF STOCKHOLDERS FOR IMMEDIATE RELEASE: May 22, 2012 GTSI Contact: Peter Whitfield t: 703-502-2954 e: [email protected] GTSI POSTPONES ANNUAL MEETING OF STOCKHOLDERS HERNDON, VA., May 22, 2012– As previously announced, GTSI ® Corp. (NASDAQ: GTSI), a systems integration, solutions and services provider to government, entered into a definitive

May 22, 2012 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - FORM 8-K

Form 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 22, 2012 GTSI Corp. Incorporated in Delaware Commission File No. 1-34871 I.R.S. Employer Identification No. 54-1248422 2553 Dulles View Drive, #100 Herndon, Virginia 2017

May 18, 2012 EX-99.(E)(4)

GTSI CORP. NON-DISCLOSURE AGREEMENT

Exhibit (e)(4) Exhibit (e)(4) GTSI CORP. NON-DISCLOSURE AGREEMENT This Non-Disclosure Agreement (“Agreement”) is dated and made effective this 24th day of February, 2012, by and between GTSI Corp., (“GTSI”) with offices at 2553 Dulles View Drive, Suite 100, Herndon, Virginia 20171, and UNICOM Systems, Inc. (“Company”), with offices at UNICOM Plaza Suite 310, 15535 San Fernando Mission Boulevard, M

May 18, 2012 EX-99.(E)(7)

GTSI desires to retain you and thank you for your commitment to the organization. Additionally, we are pleased that you are willing to take on the Acting General Counsel role for GTSI. In light of these events the Board has approved the following add

Exhibit (e)(7) Exhibit (e)(7) Date: 16 November 2010 (revised) To: Joseph Uglialoro Acting General Counsel Re: Additional Employment Benefits GTSI desires to retain you and thank you for your commitment to the organization.

May 18, 2012 EX-99.(E)(5)

NON-DISCLOSURE AGREEMENT

Exhibit (e)(5) Exhibit (e)(5) NON-DISCLOSURE AGREEMENT In connection with your consideration of a possible transaction with GTSI Corp.

May 18, 2012 EX-99.(E)(10)

First Amendment to Employment Agreement

Exhibit (e)(10) Exhibit (e)(10) First Amendment to Employment Agreement Effective September 1, 2009, this Second Amendment to the Employment Agreement dated as of October 29, 2008 between GTSI Corp.

May 18, 2012 EX-99.(A)(1)(F)

Notice of Offer to Purchase for Cash All Outstanding Shares of Common Stock GTSI Corp. $7.75 Net Per Share UNICOM SUB ONE, INC., a wholly-owned subsidiary of UNICOM Systems, Inc.

Summary Advertisement This announcement is neither an offer to purchase nor a solicitation of an offer to sell Shares (as defined below).

May 18, 2012 SC 14D9

- SCHEDULE 14D-9

Schedule 14D-9 Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

May 18, 2012 EX-99.(A)(1)(A)

Offer to Purchase for Cash All Outstanding Shares of Common Stock GTSI CORP. $7.75 Net Per Share UNICOM SUB ONE, INC., a wholly owned subsidiary of UNICOM SYSTEMS, INC. THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY TIME

Offer to Purchase, dated May 18, 2012. Exhibit (a)(1)(A) Offer to Purchase for Cash All Outstanding Shares of Common Stock of GTSI CORP. at $7.75 Net Per Share by UNICOM SUB ONE, INC., a wholly owned subsidiary of UNICOM SYSTEMS, INC. THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY TIME, ON JUNE 15, 2012, UNLESS THE OFFER IS EXTENDED OR EARLIER TERMINATED The Offer (as

May 18, 2012 EX-99.(E)(9)

EMPLOYMENT AGREEMENT

Exhibit (e)(9) EMPLOYMENT AGREEMENT This Employment Agreement (this “Agreement”) is entered into as of the October 7, 2011, by and between GTSI Corp.

May 18, 2012 EX-99.(A)(1)(E)

Offer to Purchase for Cash All Outstanding Shares of Common Stock GTSI CORP. $7.75 Net Per Share UNICOM SUB ONE, INC. a wholly owned subsidiary of UNICOM SYSTEMS, INC. THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY TIME,

Form of Letter to Clients for use by Brokers, Dealers, Commercial Banks Exhibit (a)(1)(E) Offer to Purchase for Cash All Outstanding Shares of Common Stock of GTSI CORP.

May 18, 2012 EX-99.(A)(1)(B)

LETTER OF TRANSMITTAL To Tender Shares of Common Stock GTSI CORP., a Delaware corporation $7.75 NET PER SHARE Pursuant to the Offer to Purchase dated May 18, 2012 UNICOM SUB ONE, INC., a Delaware corporation a wholly-owned subsidiary of UNICOM SYSTEM

Form of Letter of Transmittal Exhibit (a)(1)(B) LETTER OF TRANSMITTAL To Tender Shares of Common Stock of GTSI CORP.

May 18, 2012 SC TO-T

- SCHEDULE TO

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No.

May 18, 2012 EX-99.(A)(1)(D)

Offer to Purchase for Cash All Outstanding Shares of Common Stock GTSI CORP. $7.75 Net Per Share UNICOM SUB ONE, INC. a wholly owned subsidiary of UNICOM SYSTEMS, INC. THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY TIME,

Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Others Exhibit (a)(1)(D) Offer to Purchase for Cash All Outstanding Shares of Common Stock of GTSI CORP.

May 18, 2012 EX-99.(A)(1)(C)

Notice of Guaranteed Delivery For Tender of Shares of Common Stock GTSI CORP. $7.75 NET PER SHARE Pursuant to the Offer to Purchase dated May 18, 2012 UNICOM SUB ONE, INC. a wholly owned subsidiary of UNICOM SYSTEMS, INC. THE OFFER AND WITHDRAWAL RIG

Form of Notice of Guaranteed Delivery Exhibit (a)(1)(C) Notice of Guaranteed Delivery For Tender of Shares of Common Stock of GTSI CORP.

May 18, 2012 EX-99.(A)(2)(I)

May 18, 2012

Exhibit (a)(2)(i) Exhibit (a)(2)(i) May 18, 2012 Dear Stockholder: On behalf of the Board of Directors of GTSI Corp.

May 10, 2012 EX-99.1

GTSI Reports First Quarter Results

EX-99.1 Exhibit 99.1 GTSI Reports First Quarter Results HERNDON, VA., May 10, 2012 – GTSI Corp. (NASDAQ: GTSI), a systems integration, solutions and services provider to federal, state and local governments, today announced its financial results for the three months ended March 31, 2012. Reported Results For the first quarter of 2012, GTSI reported an 8.6% increase in total revenue to $76.4 millio

May 10, 2012 10-Q

Quarterly Report - FORM 10-Q

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

May 10, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - FORM 8-K

FORM 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 10, 2012 GTSI Corp. Incorporated in Delaware Commission File No. 1-34871 I.R.S. Employer Identification No. 54-1248422 2553 Dulles View Drive, #100 Herndon, Virginia 2017

May 9, 2012 SC14D9C

- SC 14D9-C

SC 14D9-C SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 GTSI CORP. (Name of Subject Company) GTSI CORP. (Names of Persons Filing Statement) Common stock, $0.005 par value (Title of Class of Securities) 36238K103 (CUSIP Number of Class of Securities) Sterling E. Phillips, J

May 7, 2012 SC TO-C

- SCHEDULE TO

SCHEDULE TO Securities and Exchange Commission Washington, D.C. 20549 Schedule TO Tender Offer Statement Under Section 14(d)(1) or 13(e)(1) of the Securities Exchange Act of 1934 (Amendment No. )* GTSI Corp. (Name of Subject Company [Issuer]) UNICOM SUB ONE, INC. (Offeror) A Wholly Owned Subsidiary of UNICOM SYSTEMS, INC. (Parent of Offeror) (Names of Filing Persons (identifying status as offeror,

May 7, 2012 EX-2.1

AGREEMENT AND PLAN OF MERGER DATED AS OF MAY 7, 2012 BY AND AMONG GTSI, CORP., UNICOM SYSTEMS, INC., UNICOM SUB ONE, INC. TABLE OF CONTENTS Page ARTICLE 1 THE OFFER AND THE MERGER 2 1.1 The Offer 2 1.2 Company Actions 3 1.3 Top-Up Option 4 1.4 Tender

Exhibit 2.1 Exhibit 2.1 AGREEMENT AND PLAN OF MERGER DATED AS OF MAY 7, 2012 BY AND AMONG GTSI, CORP., UNICOM SYSTEMS, INC., AND UNICOM SUB ONE, INC. TABLE OF CONTENTS Page ARTICLE 1 THE OFFER AND THE MERGER 2 1.1 The Offer 2 1.2 Company Actions 3 1.3 Top-Up Option 4 1.4 Tender Agreements 6 ARTICLE 2 THE MERGER 6 2.1 The Merger 6 2.2 Effective Time of the Merger 6 2.3 Closing 6 2.4 Effects of the

May 7, 2012 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 x Filed by a party other than the Registrant ¨ Check the appropriate box: ¨ Preliminary Proxy Statement ¨ Confidential, for Use of

May 7, 2012 EX-99.1

2

Press Release dated May 7, 2012 Exhibit 99.1 GTSI TO BE ACQUIRED BY UNICOM SYSTEMS THROUGH CASH TENDER OFFER FOR IMMEDIATE RELEASE: May 7, 2012 GTSI Contact: Peter Whitfield t: 703-502-2954 e: [email protected] Unicom Contact: Russ Guzzo t: 818-838-0606 e: [email protected] GTSI TO BE ACQUIRED BY UNICOM SYSTEMS THROUGH CASH TENDER OFFER Stockholders to Receive $7.75 Per Share in C

May 7, 2012 EX-99.1

STOCKHOLDER TENDER AGREEMENT

Exhibit 99.1 STOCKHOLDER TENDER AGREEMENT STOCKHOLDER TENDER AGREEMENT (this “Agreement”), dated as of May 7, 2012, is made and entered into by and among UNICOM Systems, Inc., a California corporation (“Parent”), UNICOM SUB ONE, INC., a Delaware corporation and a wholly owned subsidiary of Parent (“Merger Sub”) and the stockholders of GTSI Corp., a Delaware corporation (the “Company”) listed on th

May 7, 2012 SC14D9C

- SC14D9C

SC14D9C SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 14D-9 SOLICITATION/RECOMMENDATION STATEMENT UNDER SECTION 14(d)(4) OF THE SECURITIES EXCHANGE ACT OF 1934 GTSI CORP. (Name of Subject Company) GTSI CORP. (Names of Persons Filing Statement) Common stock, $0.005 par value (Title of Class of Securities) 36238K103 (CUSIP Number of Class of Securities) Sterling E. Phillips, Jr.

May 7, 2012 EX-99.2

2

Exhibit 99.2 Exhibit 99.2 GTSI TO BE ACQUIRED BY UNICOM SYSTEMS THROUGH CASH TENDER OFFER FOR IMMEDIATE RELEASE: May 7, 2012 GTSI Contact: Peter Whitfield t: 703-502-2954 e: [email protected] UNICOM Contact: Russ Guzzo t: 818-838-0606 e: [email protected] GTSI TO BE ACQUIRED BY UNICOM SYSTEMS THROUGH CASH TENDER OFFER Stockholders to Receive $7.75 Per Share in Cash; Transaction Va

May 7, 2012 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Other Events - FORM 8-K

Form 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 7, 2012 GTSI Corp. Incorporated in Delaware Commission File No. 1-34871 I.R.S. Employer Identification No. 54-1248422 2553 Dulles View Drive, #100 Herndon, Virginia 20171

April 30, 2012 DEF 14A

- DEF 14A

UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION OMB Number: 3235-0059 Washington, D.

April 12, 2012 10-K/A

Annual Report - FORM 10-K/A

Form 10-K/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2011 Commission File Number: 001-34871 GTSI CORP. (Exact name of registrant as specified in its charter) Delaware 54-1248422 (State or other jurisdiction of (I.R.

March 29, 2012 EX-99.1

GTSI Reports Fourth Quarter Results

EX-99.1 Exhibit 99.1 GTSI Reports Fourth Quarter Results HERNDON, VA., March 29, 2012 – GTSI Corp. (NASDAQ: GTSI), a systems integration, solutions and services provider to federal, state and local governments, today announced its financial results for the three months and twelve months ended December 31, 2011. Reported Results For the fourth quarter of 2011, GTSI reported revenue of $109.3 millio

March 29, 2012 10-K

Annual Report - FORM 10-K

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

March 29, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - FORM 8-K

FORM 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 29, 2012 GTSI Corp. Incorporated in Delaware Commission File No. 1-34871 I.R.S. Employer Identification No. 54-1248422 2553 Dulles View Drive, #100 Herndon, Virginia 20

March 29, 2012 EX-99.1

GTSI Reports Fourth Quarter Results

EX-99.1 Exhibit 99.1 GTSI Reports Fourth Quarter Results HERNDON, VA., March 29, 2012 – GTSI Corp. (NASDAQ: GTSI), a systems integration, solutions and services provider to federal, state and local governments, today announced its financial results for the three months and twelve months ended December 31, 2011. Reported Results For the fourth quarter of 2011, GTSI reported revenue of $109.3 millio

March 29, 2012 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - FORM 8-K

FORM 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 29, 2012 GTSI Corp. Incorporated in Delaware Commission File No. 1-34871 I.R.S. Employer Identification No. 54-1248422 2553 Dulles View Drive, #100 Herndon, Virginia 20

March 13, 2012 PRER14A

- PRER14A

Converted by EDGARwiz UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION OMB Number: 3235-0059 Washington, D.

March 8, 2012 PRE 14A

- PRE 14A

Converted by EDGARwiz UNITED STATES OMB APPROVAL SECURITIES AND EXCHANGE COMMISSION OMB Number: 3235-0059 Washington, D.

February 14, 2012 SC 13G/A

GTSI / Gtsi Corp / Nantahala Capital Management, LLC - AMENDMENT TO SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* GTSI Corp. (Name of Issuer) Common Stock (Title of Class of Securities) 36238K103 (CUSIP Number) December 31, 2011 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

February 14, 2012 SC 13G/A

GTSI / Gtsi Corp / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 12)* GTSI CORP (Name of Issuer) Common Stock (Title of Class of Securities) 36238K103 (CUSIP Number) December 31, 2011 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is

February 9, 2012 SC 13G/A

GTSI / Gtsi Corp / PRICE T ROWE ASSOCIATES INC /MD/ - GTSI AS OF 12/31/11 Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7)* GTSI CORP (Name of Issuer) COMMON STOCK (Title of Class of Securities) 36238K103 (CUSIP Number) December 31, 2011 (Date of Event which Requires Filing of Statement) Check the appropriate box to designate the Rule pursuant to which this Schedule is filed:

January 18, 2012 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - FORM 8-K

Form 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): January 11, 2012 GTSI Corp. (Exact name of registrant as specified in its charter) Delaware 1-34871 54-1248422 (State or other jurisdiction of incorporation) (Commission File

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