SGTX / Sigilon Therapeutics Inc - SEC-arkivering, Årsberetning, Fuldmagtserklæring

Sigilon Therapeutics Inc
US ˙ NASDAQ ˙ US82657L1070
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT

Grundlæggende statistik
CIK 1821323
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 Sigilon Therapeutics Inc
SEC Filings (Chronological Order)
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February 14, 2024 SC 13G/A

SGTX / Sigilon Therapeutics Inc / Flagship Ventures Fund V, L.P. - SC 13G/A Passive Investment

SC 13G/A 1 d783133dsc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Sigilon Therapeutics, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 82657L 10 7 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement

August 21, 2023 15-12G

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

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 001-39746 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified

August 14, 2023 EX-2.3

Lilly Completes Acquisition of Sigilon Therapeutics

EX-2.3 2 d401100dex23.htm EX-2.3 Exhibit 2.3 Aug. 14, 2023 For Release: Immediately Refer to: Jordan Bishop; [email protected]; 317-473-5712 (Media) Joe Fletcher; [email protected]; 317-296-2884 (Investors) Lilly Completes Acquisition of Sigilon Therapeutics INDIANAPOLIS, Aug. 14, 2023 — Eli Lilly and Company (NYSE: LLY) today announced the successful completion of its acquisition of Sigil

August 14, 2023 SC 13D/A

US82657L2060 / SIGILON THERAPEUTICS INC / ELI LILLY & Co - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D (Amendment No. 1)* Under the Securities Exchange Act of 1934 Sigilon Therapeutics, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 82657L206 (CUSIP Number) Anat Hakim Executive Vice President, General Counsel and Secretary Eli Lilly and Company Lilly Corporate

August 11, 2023 POS AM

As filed with the Securities and Exchange Commission on August 11, 2023

As filed with the Securities and Exchange Commission on August 11, 2023 Registration No.

August 11, 2023 S-8 POS

As filed with the Securities and Exchange Commission on August 11, 2023

S-8 POS As filed with the Securities and Exchange Commission on August 11, 2023 Registration No.

August 11, 2023 S-8 POS

As filed with the Securities and Exchange Commission on August 11, 2023

As filed with the Securities and Exchange Commission on August 11, 2023 Registration No.

August 11, 2023 EX-3.1

Amended and Restated Certificate of Incorporation of Sigilon Therapeutics, Inc.

EX-3.1 Exhibit 3.1 Amended and Restated Certificate of Incorporation of Sigilon Therapeutics, Inc. 1. The name of the corporation formed hereby is Sigilon Therapeutics, Inc. (the “Corporation”). 2. The address of the Corporation’s registered office in the State of Delaware is 1209 Orange Street, Wilmington, New Castle County, Delaware 19801, and the name of the Corporation’s registered agent at su

August 11, 2023 S-8 POS

As filed with the Securities and Exchange Commission on August 11, 2023

As filed with the Securities and Exchange Commission on August 11, 2023 Registration No.

August 11, 2023 S-8 POS

As filed with the Securities and Exchange Commission on August 11, 2023

As filed with the Securities and Exchange Commission on August 11, 2023 Registration No.

August 11, 2023 EX-3.2

AMENDED AND RESTATED BYLAWS SIGILON THERAPEUTICS, INC. (a Delaware corporation) ARTICLE I

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF SIGILON THERAPEUTICS, INC. (a Delaware corporation) ARTICLE I STOCKHOLDERS Section 1. Annual Meetings. The annual meeting of the stockholders of Sigilon Therapeutics, Inc. (the “Corporation”) for the election of directors and for the transaction of such other business as may properly come before the meeting shall be held each year at such date and time, w

August 11, 2023 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 11, 2023 SIGILON THERAPEUT

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 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or Other Jurisdiction of Incorporation) (Commiss

August 10, 2023 SC TO-T/A

UNITED STATES 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. 3) SIGILON THERAPEUTICS, INC. (Name of Subject Company

SC TO-T/A UNITED STATES 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. 3) SIGILON THERAPEUTICS, INC. (Name of Subject Company (issuer)) SHENANDOAH ACQUISITION CORPORATION (Offeror) a wholly-owned subsidiary of ELI LILLY AND COMPANY (Parent of Offeror) (Names of Fil

August 10, 2023 SC 14D9/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Amendment No. 3) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 SIGILON THERAPEUTICS, INC. (Name of Subject C

SC 14D9/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14D-9 (Amendment No. 3) Solicitation/Recommendation Statement Under Section 14(d)(4) of the Securities Exchange Act of 1934 SIGILON THERAPEUTICS, INC. (Name of Subject Company) SIGILON THERAPEUTICS, INC. (Name of Person Filing Statement) Common stock, par value $0.001 per share (Title of Class of Securities)

August 7, 2023 EX-10.1

Sigilon Therapeutics, Inc. 2016 Equity Incentive Plan, as amended on May 23, 2023

Exhibit 10.1 As amended as of September 12, 2019 As amended as of May 23, 2023 SIGILON THERAPEUTICS, INC. 2016 EQUITY INCENTIVE PLAN 1.DEFINED TERMS Exhibit A, which is incorporated by reference, defines the terms used in the Plan and sets forth certain operational rules related to those terms. 2.PURPOSE The Plan has been established to advance the interests of the Company by providing for the gra

August 7, 2023 10-Q

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 ⌧ 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 Sigilon Therapeutics, Inc. (Exact n

August 7, 2023 EX-10.2

Sigilon Therapeutics, Inc. 2020 Equity Incentive Plan, as amended on May 23, 2023

Exhibit 10.2 As amended as of May 23, 2023 sigilon therapeutics, INC. 2020 Equity INCENTIVE PLAN DEFINED TERMS Exhibit A, which is incorporated by reference, defines certain terms used in the Plan and includes certain operational rules related to those terms. PURPOSE The Plan has been established to advance the interests of the Company by providing for the grant to Participants of Stock and Stock-

August 7, 2023 EX-10.4

Sigilon Therapeutics, Inc. Non-Employee Director Compensation Policy, as amended on May 23, 2023

Exhibit 10.4 As amended as of May 23, 2023 Sigilon Therapeutics, Inc. Non-Employee Director Compensation Policy Effective as of the initial public offering (the “IPO”) of the common stock of Sigilon Therapeutics, Inc. (the “Company”), each individual who provides services to the Company as a director, other than a director who is employed by the Company or a subsidiary (a “Non-Employee Director”),

August 7, 2023 EX-10.3

Sigilon Therapeutics, Inc. 2020 Employee Stock Purchase Plan, as amended on May 23, 2023

Exhibit 10.3 As amended as of May 23, 2023 Sigilon Therapeutics, Inc. 2020 Employee Stock Purchase Plan Defined Terms Exhibit A, which is incorporated by reference, defines the terms used in the Plan and sets forth certain operational rules related to those terms. Purpose of Plan The Plan is intended to enable Eligible Employees to use payroll deductions to purchase shares of Stock in offerings un

August 1, 2023 SC 14D9/A

UNITED STATES 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 (Amendment No. 2) SIGILON THERAPEUTICS, INC. (Name of Subject C

UNITED STATES 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 (Amendment No. 2) SIGILON THERAPEUTICS, INC. (Name of Subject Company) SIGILON THERAPEUTICS, INC. (Name of Persons Filing Statement) Common stock, par value $0.001 per share (Title of Class of Securities) 82657L20

August 1, 2023 SC TO-T/A

UNITED STATES 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. 2) SIGILON THERAPEUTICS, INC. (Name of Subject Company

SC TO-T/A UNITED STATES 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. 2) SIGILON THERAPEUTICS, INC. (Name of Subject Company (issuer)) SHENANDOAH ACQUISITION CORPORATION (Offeror) a wholly-owned subsidiary of ELI LILLY AND COMPANY (Parent of Offeror) (Names of Fil

July 18, 2023 SC TO-T/A

UNITED STATES 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. 1) SIGILON THERAPEUTICS, INC. (Name of Subject Company

SC TO-T/A UNITED STATES 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. 1) SIGILON THERAPEUTICS, INC. (Name of Subject Company (issuer)) SHENANDOAH ACQUISITION CORPORATION (Offeror) a wholly-owned subsidiary of ELI LILLY AND COMPANY (Parent of Offeror) (Names of Fil

July 18, 2023 SC 14D9/A

UNITED STATES 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 (Amendment No. 1) SIGILON THERAPEUTICS, INC. (Name of Subject C

SC 14D9/A UNITED STATES 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 (Amendment No. 1) SIGILON THERAPEUTICS, INC. (Name of Subject Company) SIGILON THERAPEUTICS, INC. (Name of Persons Filing Statement) Common stock, par value $0.001 per share (Title of Class of Securities

July 13, 2023 SC 14D9

UNITED STATES 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 SIGILON THERAPEUTICS, INC. (Name of Subject Company) SIGILON TH

Table of Contents UNITED STATES 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 SIGILON THERAPEUTICS, INC. (Name of Subject Company) SIGILON THERAPEUTICS, INC. (Name of Persons Filing Statement) Common stock, par value $0.001 per share (Title of Class of Securities) 82657L10

July 13, 2023 EX-99.(E)(21)

INDEMNIFICATION AGREEMENT

EX-99.(e)(21) Exhibit (e)(21) INDEMNIFICATION AGREEMENT THIS INDEMNIFICATION AGREEMENT (this “Agreement”) is made and entered into as of , 2020 between Sigilon Therapeutics, Inc., a Delaware corporation (the “Company”), and (“Indemnitee”). WITNESSETH THAT: WHEREAS, highly competent persons have become more reluctant to serve corporations as directors or in other capacities unless they are provided

July 13, 2023 EX-FILING FEES

Filing Fee Table.

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables Schedule TO SIGILON THERAPEUTICS, INC.

July 13, 2023 EX-99.(A)(1)(A)

Offer to Purchase, dated July 13, 2023.

EX-99.(a)(1)(A) Table of Contents Exhibit (a)(1)(A) Offer to Purchase All Outstanding Shares of Common Stock of SIGILON THERAPEUTICS, INC. at $14.92 per share, net in cash, without interest and less any applicable tax withholding, plus, one non-tradable contingent value right (“CVR”) per share, which represents the contractual right to receive contingent payments in an aggregate amount of up to $1

July 13, 2023 EX-99.(A)(1)(B)

Form of Letter of Transmittal (including Internal Revenue Service Form W-9).

EX-99.(a)(1)(B) Exhibit (a)(1)(B) LETTER OF TRANSMITTAL to Tender Shares of Common Stock of SIGILON THERAPEUTICS, INC. at $14.92 per share, net in cash, without interest and less any applicable tax withholding, plus one non-tradable contingent value right (“CVR”) per share, which represents the contractual right to receive contingent payments of up to an aggregate of $111.64 per CVR, net to the st

July 13, 2023 EX-99.(A)(1)(C)

Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.

EX-99.(a)(1)(C) Exhibit (a)(1)(C) Offer to Purchase All Outstanding Shares of Common Stock of SIGILON THERAPEUTICS, INC. at $14.92 per share, net in cash, without interest and less any applicable tax withholding, plus one non-tradable contingent value right (“CVR”) per share, which represents the contractual right to receive contingent payments of up to $111.64 per CVR, net to the stockholder in c

July 13, 2023 EX-99.(E)(9)

May 1, 2019

EX-99.(e)(9) Exhibit (e)(9) May 1, 2019 Matthew Kowalsky [email protected] Re: Employment by Sigilon, Inc. Dear Matthew: Sigilon, Inc. (the “Company”) is pleased to confirm its offer to employ you as SVP, General Counsel reporting to Rogerio Vivaldi, CEO. It is understood that you will be employed by the Company in such capacity or such other capacity as may be mutually agreed upon by the Com

July 13, 2023 EX-99.(D)(6)

Amended and Restated Mutual Confidentiality Agreement, dated May 12, 2023, between Eli Lilly and Company and Sigilon Therapeutics, Inc.

EX-99.(d)(6) Exhibit (d)(6) MUTUAL CONFIDENTIALITY AGREEMENT THIS MUTUAL CONFIDENTIALITY AGREEMENT (the “Agreement”) is made on the date of acceptance (the “Effective Date”), between Eli Lilly and Company, having its principal place of business at Lilly Corporate Center, Indianapolis, Indiana 46285, U.S.A. (“Lilly”); and Sigilon Therapeutics, Inc., having its principal place of business at 100 Bin

July 13, 2023 SC TO-T

UNITED STATES 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 SIGILON THERAPEUTICS, INC. (Name of Subject Company (issuer)) SHENAND

SC TO-T UNITED STATES 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 SIGILON THERAPEUTICS, INC. (Name of Subject Company (issuer)) SHENANDOAH ACQUISITION CORPORATION (Offeror) a wholly-owned subsidiary of ELI LILLY AND COMPANY (Parent of Offeror) (Names of Filing Persons (identif

July 13, 2023 EX-99.(A)(1)(D)

Form of Letter to Clients for Use by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.

EX-99.(a)(1)(D) Exhibit (a)(1)(D) Offer to Purchase All Outstanding Shares of Common Stock of SIGILON THERAPEUTICS, INC. at $14.92 per share, net in cash, without interest and less any applicable tax withholding, plus one non-tradable contingent value right (“CVR”) per share, which represents the contractual right to receive contingent payments of up to an aggregate of $111.64 per CVR, net to the

July 13, 2023 EX-99.(A)(1)(E)

Summary Advertisement, as published in The Wall Street Journal on July 13, 2023.

EX-99.(a)(1)(E) Exhibit (a)(1)(E) This announcement is neither an offer to purchase nor a solicitation of an offer to sell Shares (as defined below). The Offer (as defined below) is being made only by the Offer to Purchase, dated July 13, 2023 (the “Offer to Purchase”) and the related Letter of Transmittal (the “Letter of Transmittal”), as each may be amended or supplemented from time to time, and

July 7, 2023 SC 13D

SGTX / Sigilon Therapeutics Inc / ELI LILLY & Co - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 Sigilon Therapeutics, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 82657L107 (CUSIP Number) Anat Hakim Executive Vice President, General Counsel and Secretary Eli Lilly and Company Lilly Corporate Center Indianapolis,

July 7, 2023 EX-99.1

Joint Filing Agreement, dated as of July 7, 2023, by and among Eli Lilly and Company and Shenandoah Acquisition Corporation.*

EX-99.1 EXHIBIT 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that this Statement is being jointly filed, and all amendments thereto will be jointly filed, by Eli Lilly and Company, as the main and designated filer, on behalf of each of the persons and entities named below that is name

July 7, 2023 EX-2.2

Tender and Support Agreement, dated June 28, 2023, by and among Eli Lilly and Company, Shenandoah Acquisition Corporation, Flagship Ventures Fund V, L.P. and Flagship Pioneering Special Opportunities Fund II, L.P.

EX-2.2 Exhibit 2.2 TENDER AND SUPPORT AGREEMENT This TENDER AND SUPPORT AGREEMENT (this “Agreement”), dated as of June 28, 2023, is entered into by and among Eli Lilly and Company, an Indiana corporation (“Parent”), Shenandoah Acquisition Corporation, a Delaware corporation and a direct wholly-owned subsidiary of Parent (“Purchaser”), and one or more stockholders of Sigilon Therapeutics, Inc., a D

June 29, 2023 EX-2.1

Agreement and Plan of Merger, dated as of June 28, 2023, by and among Eli Lilly and Company, Shenandoah Acquisition Corporation and Sigilon Therapeutics, Inc. (incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K filed by Sigilon Therapeutics, Inc. with the SEC on June 29, 2023).

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER among ELI LILLY AND COMPANY, SHENANDOAH ACQUISITION CORPORATION and SIGILON THERAPEUTICS, INC. Dated as of June 28, 2023 THIS DOCUMENT IS NOT INTENDED TO CREATE, NOR WILL IT BE DEEMED TO CREATE, A LEGALLY BINDING OR ENFORCEABLE OFFER OR AGREEMENT OF ANY TYPE OR NATURE, UNLESS AND UNTIL AGREED AND EXECUTED BY THE PARTIES HERETO. THIS DOCUMENT REMAINS SUBJECT

June 29, 2023 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 28, 2023 SIGILON THERAPEUTIC

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 28, 2023 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or Other Jurisdiction of Incorporation) (Commissio

June 29, 2023 EX-99.1

Lilly to Acquire Sigilon Therapeutics

Exhibit 99.1 June 29, 2023 For Release: June 29, 2023 @ 6:45 a.m. ET Refer to: Jordan Bishop; [email protected]; 317-473-5712 (Media) Joe Fletcher; [email protected]; 317-296-2884 (Investors) Amy Bonanno; [email protected]; 914-450-0349 (Sigilon Media) Lilly to Acquire Sigilon Therapeutics INDIANAPOLIS and CAMBRIDGE, Mass., June 29, 2023 – Eli Lilly and Company (NYSE: LLY) and Sig

June 29, 2023 EX-99.1

Lilly to Acquire Sigilon Therapeutics

Exhibit 99.1 June 29, 2023 For Release: Immediately Refer to: Carrie Munk; [email protected]; 317-416-2393 Joe Fletcher; [email protected]; 317-296-2884 (Investors) Amy Bonanno; [email protected]; 914-450-0349 (Sigilon Media) Lilly to Acquire Sigilon Therapeutics INDIANAPOLIS and CAMBRIDGE, Mass., June 29, 2023 – Eli Lilly and Company (NYSE: LLY) and Sigilon Therapeutics, Inc. (Nasda

June 29, 2023 SC TO-C

UNITED STATES 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 SIGILON THERAPEUTICS, INC. (Name of Subject Company (issuer)) SHENAND

UNITED STATES 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 SIGILON THERAPEUTICS, INC. (Name of Subject Company (issuer)) SHENANDOAH ACQUISITION CORPORATION (Offeror) a wholly-owned subsidiary of ELI LILLY AND COMPANY (Parent of Offeror) (Names of Filing Persons (identifying sta

June 29, 2023 EX-10.1

Form of Contingent Value Rights Agreement, by and among Eli Lilly and Company, Shenandoah Acquisition Corporation and a rights agent selected by Eli Lilly and Company and reasonably acceptable to Sigilon Therapeutics, Inc. (incorporated by reference to Exhibit 2.5 to the Current Report on Form 8-K filed by Sigilon Therapeutics, Inc. with the U.S. Securities and Exchange Commission on June 29, 2023 (File No. 001-39746)).

Exhibit 10.1 FORM OF CONTINGENT VALUE RIGHTS AGREEMENT This CONTINGENT VALUE RIGHTS AGREEMENT, dated as of [●], 2023 (this “Agreement”), is entered into by and among Eli Lilly and Company, an Indiana corporation (“Parent”), Shenandoah Acquisition Corporation, a Delaware corporation and wholly owned Subsidiary of Parent (“Purchaser”), and [●], a [●], as Rights Agent (as defined herein). Capitalized

May 22, 2023 EX-3.1

Amendment to Fifth Amended and Restated Certificate of Incorporation

Exhibit 3.1 Charter Amendment Certificate of amendment to the FIFTH AMENDED AND restated certificate of incorporation of Sigilon Therapeutics, inc. Sigilon Therapeutics, Inc., a corporation duly organized and existing under the General Corporation Law of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY: FIRST: The name of the Corporation is: Sigilon Therapeutics, Inc. SECOND: The Cor

May 22, 2023 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 19, 2023 SIGILON THERAPEUTICS

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 19, 2023 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IRS Employer of

May 9, 2023 EX-99.1

SIGILON THERAPEUTICS REPORTS FIRST QUARTER 2023 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS SIG-002, Sigilon’s lead program for the treatment of diabetes, transitioning to IND-enabling and NHP studies in the second half of 2023 Pipeline prioritization

Exhibit 99.1 SIGILON THERAPEUTICS REPORTS FIRST QUARTER 2023 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS SIG-002, Sigilon’s lead program for the treatment of diabetes, transitioning to IND-enabling and NHP studies in the second half of 2023 Pipeline prioritization extends anticipated cash runway into 2025 Cambridge, MA—May 9, 2023—Sigilon Therapeutics, Inc. (NASDAQ: SGTX), a biotechnology company th

May 9, 2023 10-Q

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 ⌧ 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 Sigilon Therapeutics, Inc. (Exact

May 9, 2023 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 9, 2023 SIGILON THERAPEUTICS,

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 9, 2023 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IRS Employer of i

April 6, 2023 DEF 14A

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 (Amendment No. )

Table of Contents 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 (Amendment No. ) 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 14

April 6, 2023 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange ACT of 1934 (Amendment No. ) 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 (a

March 23, 2023 PRE 14A

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 (Amendment No. )

Table of Contents 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 (Amendment No. ) 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 14

March 14, 2023 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 14, 2023 SIGILON THERAPEUTI

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 14, 2023 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IRS Employer o

March 14, 2023 EX-10.36

Form of Restricted Stock Unit Agreement under the Sigilon Therapeutics, Inc. 2020 Equity Incentive Plan

Exhibit 10.36 Sigilon Therapeutics, Inc. 2020 Equity Incentive Plan Restricted Stock Unit Agreement This agreement (this “Agreement”) evidences a grant (the “Award”) of Restricted Stock Units (“RSUs”) by Sigilon Therapeutics, Inc., a Delaware corporation (the “Company”), to the individual named above (the “Participant”), pursuant to and subject to the terms of the Sigilon Therapeutics, Inc. 2020 E

March 14, 2023 EX-10.24

Letter Agreement, dated February 10, 2023, between the Company and May Orfali, M.D.

Exhibit 10.24 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. February 10, 2023 BY HAND & ELECTRONIC DELIVERY May Orfali, M.D. Dear May: As we have discussed, your employment with Sigilon Therapeutics, Inc. (the “Company”) has termin

March 14, 2023 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 Sigilon Therapeutics, Inc. Subsidiary State or Other Jurisdiction of Incorporation or Organization Sigilon Securities Corporation Massachusetts

March 14, 2023 S-8

As filed with the Securities and Exchange Commission on March 14, 2023

As filed with the Securities and Exchange Commission on March 14, 2023 Registration No.

March 14, 2023 EX-99.2

Forward-looking statements This presentation has been prepared by Sigilon Therapeutics, Inc. (“we,” “us,” “our,” “Sigilon” or the “Company”) and contains forward-looking statements. All statements other than statements of historical facts contained i

Exhibit 99.2 ©2023 Sigilon Therapeutics, Inc. March 2023 Leading the Next Frontier of Allogeneic Cell Therapy Forward-looking statements This presentation has been prepared by Sigilon Therapeutics, Inc. (“we,” “us,” “our,” “Sigilon” or the “Company”) and contains forward-looking statements. All statements other than statements of historical facts contained in this presentation are forward-looking

March 14, 2023 EX-10.27

Offer Letter, between Sigilon Therapeutics, Inc. and Josias Pontes, dated October 23, 2019

Exhibit 10.27 October 23, 2019 Josias Fantato de Pontes Re: Employment by Sigilon, Inc. Dear Josias: Sigilon, Inc. (the "Company") is pleased to confirm its offer to employ you as VP, Head of Finance reporting to Glenn Reicin, Chief Financial Officer. It is understood that you will be employed by the Company in such capacity or such other capacity as may be mutually agreed upon by the Company and

March 14, 2023 EX-10.26

Offer Letter, between Sigilon Therapeutics, Inc. and Sarah Yuan, dated January 12, 2022

Exhibit 10.26 January 12, 2022 VIA ELECTRONIC MAIL Qing Sarah Yuan, Ph.D. Dear Sarah, On behalf of Sigilon Therapeutics, Inc. (the “Company”), I am delighted to make this conditional offer of employment with the Company. This offer letter (the “Offer Letter”) and the accompanying documents and agreements summarize and set forth important terms about your employment with the Company. 1.Starting Dat

March 14, 2023 EX-10.23

Consulting Agreement, dated February 14, 2023, between the Company and May Orfali, M.D.

Exhibit 10.23 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. Consulting Agreement [May Orfali, MD, MBA] This Consulting Agreement (the “Agreement”), is made as of February 14, 2023 (the “Effective Date”) by and between Sigilon Thera

March 14, 2023 EX-99.1

SIGILON THERAPEUTICS REPORTS FOURTH QUARTER AND FULL YEAR 2022 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS Advancing IND-enabling activities for lead program in diabetes, SIG-002, with plans to conduct non-human primate studies in second half of 2023 S

Exhibit 99.1 SIGILON THERAPEUTICS REPORTS FOURTH QUARTER AND FULL YEAR 2022 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS Advancing IND-enabling activities for lead program in diabetes, SIG-002, with plans to conduct non-human primate studies in second half of 2023 SIG-002 demonstrated efficacy and durability in in vivo mouse models for up to 17 weeks Extended anticipated cash runway into 2025 Cambrid

March 14, 2023 10-K

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

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE EXCHANGE ACT Sigilon Therapeutics, Inc. (Exact name of registrant as specified in its charter) - Delaware 00

March 14, 2023 EX-FILING FEES

Calculation of Filing Fee Tables

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Sigilon Therapeutics, Inc.

March 10, 2023 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 10, 2023 SIGILON THERAPEUTI

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 10, 2023 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IRS Employer o

February 28, 2023 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 23, 2023 SIGILON THERAPE

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 23, 2023 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IRS Employe

February 13, 2023 8-K

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): February 10, 2023 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IRS Employe

December 21, 2022 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

? ? ? 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 20, 2022 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commissio

November 10, 2022 10-Q

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 ⌧ 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 Sigilon Therapeutics, Inc. (Ex

November 10, 2022 EX-99.2

Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (“we,” “us,” “our,” “Sigilon” or the “Company”) and is made fo r informational purposes only and not for any other purpose. Certain information contained in this presentatio

Exhibit 99.2 Pioneering A Cell Therapy Powerhouse ©2022 Sigilon Therapeutics, Inc. November 2022 Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (“we,” “us,” “our,” “Sigilon” or the “Company”) and is made fo r informational purposes only and not for any other purpose. Certain information contained in this presentation and statements made orally during this presentation

November 10, 2022 EX-99.1

SIGILON THERAPEUTICS REPORTS THIRD QUARTER 2022 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS Identified important optimization features for its platform to mitigate PFO risks in current and future programs Advanced iPS cell differentiation protocol for

Exhibit 99.1 SIGILON THERAPEUTICS REPORTS THIRD QUARTER 2022 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS Identified important optimization features for its platform to mitigate PFO risks in current and future programs Advanced iPS cell differentiation protocol for the diabetes program in preparation for anticipated IND-enabling studies in 2023 Continued optimization of the MPS-1 program, with plans

November 10, 2022 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): November 10, 2022 SIGILON THERAPE

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 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IRS Employe

October 11, 2022 8-K

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): October 11, 2022 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission

October 11, 2022 EX-99.1

Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (“we,” “us,” “our,” “Sigilon” or the “Company”) and is made fo r informational purposes only and not for any other purpose. Certain information contained in this presentatio

Exhibit 99.1 Pioneering A Cell Therapy Powerhouse ?2022 Sigilon Therapeutics, Inc. October 2022 Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (?we,? ?us,? ?our,? ?Sigilon? or the ?Company?) and is made fo r informational purposes only and not for any other purpose. Certain information contained in this presentation and statements made orally during this presentation

September 26, 2022 8-K

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): September 22, 2022 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commissi

August 4, 2022 10-Q

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

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

August 4, 2022 EX-99.1

SIGILON THERAPEUTICS REPORTS SECOND QUARTER 2022 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS Company expects to report results of preclinical MPS-1 studies in second half of 2022 to inform pipeline strategy

Exhibit 99.1 SIGILON THERAPEUTICS REPORTS SECOND QUARTER 2022 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS ? Company expects to report results of preclinical MPS-1 studies in second half of 2022 to inform pipeline strategy ? Cambridge, MA?August 4, 2022?Sigilon Therapeutics, Inc. (NASDAQ: SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded L

August 4, 2022 8-K

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 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (

August 4, 2022 EX-10.1

First Amendment to Research Collaboration and Exclusive License Agreement by and among Sigilon Therapeutics, Inc. and Eli Lilly and Company, dated May 5, 2022

Exhibit 10.1 ? CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [****], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND IS THE TYPE THAT THE COMPANY TREATS AS PRIVATE OR CONFIDENTIAL. ? FIRST AMENDMENT TO RESEARCH COLLABORATION AND EXCLUSIVE LICENSE AGREEMENT This First Amendment (the ?Amendment?) to that certain Research Collaboration and Exclusive License Agreement entered

June 23, 2022 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

? ? ? 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 22, 2022 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (I

May 26, 2022 8-K

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): May 26, 2022 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IR

May 12, 2022 8-K

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 12, 2022 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IR

May 12, 2022 EX-99.1

SIGILON THERAPEUTICS REPORTS FIRST QUARTER 2022 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS On track to announce results from preclinical studies of SIG-005 in second half of 2022 Current cash position expected to fund operating plans into 2024

Exhibit 99.1 SIGILON THERAPEUTICS REPORTS FIRST QUARTER 2022 FINANCIAL RESULTS AND BUSINESS HIGHLIGHTS ? On track to announce results from preclinical studies of SIG-005 in second half of 2022 ? Current cash position expected to fund operating plans into 2024 ? Cambridge, MA?May 12, 2022?Sigilon Therapeutics, Inc. (NASDAQ: SGTX), a biotechnology company that seeks to develop functional cures for c

May 12, 2022 10-Q

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

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 20, 2022 CORRESP

SIGILON THERAPEUTICS, INC. 100 Binney Street, Suite 600 Cambridge, MA 02142

SIGILON THERAPEUTICS, INC. 100 Binney Street, Suite 600 Cambridge, MA 02142 April 20, 2022 VIA EDGAR Securities and Exchange Commission Division of Corporation Finance Office of Life Sciences 100 F. Street, N.E. Washington, D.C. 20549 Attention: Alan Campbell Re: Sigilon Therapeutics, Inc. Registration Statement on Form S-3 (File No. 333-264296) Request for Acceleration Ladies and Gentlemen: Pursu

April 14, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION

? ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 ? SCHEDULE 14A (RULE 14a-101) ? SCHEDULE 14A INFORMATION ? Proxy Statement Pursuant to Section 14(a) of the Securities Exchange ACT of 1934 (Amendment No. ) ? ? Filed by the Registrant ? ? Filed by a Party other than the Registrant ? ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the

April 14, 2022 S-3

As filed with the Securities and Exchange Commission on April 14, 2022.

? As filed with the Securities and Exchange Commission on April 14, 2022. Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-3 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Sigilon Therapeutics, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation or organization) 2834 (Primary

April 14, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables ? Form S-3 (Form Type) ? Sigilon Therapeutics, Inc.

April 14, 2022 DEF 14A

Schedule 14A

Table of Contents 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 (Amendment No. ) ? ? 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 permitte

April 14, 2022 EX-1.2

Equity Distribution Agreement, dated at of April 14, 2022, between Sigilon Therapeutics, Inc. and Canaccord Genuity LLC

Exhibit 1.2 ? Sigilon Therapeutics, Inc. ? EQUITY DISTRIBUTION AGREEMENT ? April 14, 2022 ? CANACCORD GENUITY LLC 99 High Street Boston, Massachusetts 02110 ? Ladies and Gentlemen: ? As further set forth in this agreement (this ?Agreement?), Sigilon Therapeutics, Inc., a Delaware corporation (the ?Company?), proposes to issue and sell from time to time through Canaccord Genuity LLC (the ?Agent?),

March 14, 2022 EX-10.27

Letter Agreement, dated August 4, 2021, between the Company and Deya Corzo, M.D.

Exhibit 10.27 August 4, 2021 BY HAND & ELECTRONIC DELIVERY Deya Corzo, M.D. The purpose of this letter agreement (this ?Agreement?) is to confirm the terms of the remainder of your employment with Sigilon Therapeutics, Inc. (the ?Company?) and your resignation from your employment with the Company, as follows: 1. Transition Period and Separation Date. a)Effective as of August 4, 2021 (the ?Transit

March 14, 2022 8-K

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): March 14, 2022 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (

March 14, 2022 10-K

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

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 14, 2022 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 Sigilon Therapeutics, Inc. ? ? ? Subsidiary ? State or Other Jurisdiction of Incorporation or Organization Sigilon Securities Corporation ? Massachusetts ?

March 14, 2022 EX-10.25

Offer Letter, between Sigilon Therapeutics, Inc. and Philip Ashton-Rickardt, dated May 25, 2021

? ? ? ? ? Exhibit 10.25 ? May 25, 2021 ? VIA ELECTRONIC MAIL ? Philip Ashton-Rickardt, Ph.D. ? Dear Philip, ? On behalf of Sigilon Therapeutics, Inc. (the ?Company?), I am delighted to make this conditional offer of employment with the Company. This offer letter (the ?Offer Letter?) and the accompanying documents and agreements summarize and set forth important terms about your employment with the

March 14, 2022 EX-FILING FEES

Calculation of Filing Fee Tables

EX-FILING FEES 4 tmb-20220314xexfilingfees.htm EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Sigilon Therapeutics, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price F

March 14, 2022 EX-10.28

Consulting Agreement, dated October 13, 2021, between the Company and May Orfali, M.D.

Exhibit 10.28 ? CONSULTING AGREEMENT [May Orfali, MD, MBA] This Consulting Agreement (the ?Agreement?), is made as of October 13, 2021 (the ?Effective Date?) by and between Sigilon Therapeutics, Inc. (the ?Company?), with offices at 100 Binney Street, Suite 600, Cambridge, MA 02142, and Rare Disease and Oncology Consulting, LLC, (the ?Consultant?). In consideration of the mutual covenants and prom

March 14, 2022 EX-10.13

Sixth Amendment to Exclusive Patent License Agreement, by and between Massachusetts Institute of Technology and Sigilon Therapeutics, Inc., dated February 1, 2022

?? ? Exhibit 10.13 ? CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. ? Massachusetts Institute of Technology and Sigilon Therapeutics, Inc. ? SIXTH AMENDMENT ? This Sixth Amendment (?Sixth Amendment?), effective as of February 1, 202

March 14, 2022 EX-10.24

Offer Letter, between Sigilon Therapeutics, Inc. and May Orfali, M.D. dated October 27, 2021

? ? ? ? ? Exhibit 10.24 ? October 25, 2021 ? VIA ELECTRONIC MAIL ? May Orfali, MD, MBA ? Dear May, ? On behalf of Sigilon Therapeutics, Inc. (the ?Company?), I am delighted to make this conditional offer of employment with the Company. This offer letter (the ?Offer Letter?) and the accompanying documents and agreements summarize and set forth important terms about your employment with the Company.

March 14, 2022 EX-99.2

Pioneering a New Class of Allogeneic Cell Therapy ©2022 Sigilon Therapeutics, Inc. March 2022 Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (“we,” “us,” “our,” “Sigilon” or the “Company”) and is made fo r informational

Exhibit 99.2 Pioneering a New Class of Allogeneic Cell Therapy ?2022 Sigilon Therapeutics, Inc. March 2022 Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (?we,? ?us,? ?our,? ?Sigilon? or the ?Company?) and is made fo r informational purposes only and not for any other purpose. Certain information contained in this presentation and statements made orally during this pr

March 14, 2022 EX-10.26

Offer Letter, between Sigilon Therapeutics, Inc. and Deya Corzo, M.D. dated September 26, 2018

Exhibit 10.26 September 26, 2018 Deya Corzo, MD ? Re: Employment by Sigilon, Inc. ? Dear Deya: Sigilon Therapeutics, Inc. (the "Company") is pleased to confirm its offer to employ you as its Chief Medical Officer. It is understood that you will be employed by the Company in such capacity or such other capacity as may be mutually agreed upon by the Company and you from time to time. In this capacit

March 14, 2022 EX-99.1

SIGILON THERAPEUTICS REPORTS FOURTH QUARTER AND FULL YEAR 2021 FINANCIAL RESULTS AND RECENT BUSINESS HIGHLIGHTS Announced strategic reprioritization, with plans to advance mucopolysaccharidosis type I (MPS-1) and diabetes as lead indications as well

Exhibit 99.1 SIGILON THERAPEUTICS REPORTS FOURTH QUARTER AND FULL YEAR 2021 FINANCIAL RESULTS AND RECENT BUSINESS HIGHLIGHTS ? Announced strategic reprioritization, with plans to advance mucopolysaccharidosis type I (MPS-1) and diabetes as lead indications as well as continued platform optimization ? Strengthened leadership team with appointment of new Chief Technical Operations Officer and other

March 14, 2022 S-8

As filed with the Securities and Exchange Commission on March 14, 2022

As filed with the Securities and Exchange Commission on March 14, 2022 Registration No.

February 22, 2022 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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, 2022 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commissio

February 22, 2022 EX-99.1

Sigilon Therapeutics Appoints Sarah Yuan, Ph.D., as Chief Technical Operations Officer

Exhibit 99.1 Sigilon Therapeutics Appoints Sarah Yuan, Ph.D., as Chief Technical Operations Officer ? Cambridge, MA?February 22, 2022?Sigilon Therapeutics, Inc. (NASDAQ: SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded Living Therapeutics? platform, today announced the appointment of Sarah Yuan, Ph.D., as Chief Technical Operations Off

December 13, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities

? ? ? 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 9, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission

December 13, 2021 EX-99.1

Sigilon Therapeutics Announces Strategic Reprioritization - Company plans to prioritize MPS-1 and diabetes with continued focus on platform optimization – - Workforce reduction of approximately 38% – - Anticipated cash runway extended into 2024 –

Exhibit 99.1 Sigilon Therapeutics Announces Strategic Reprioritization - Company plans to prioritize MPS-1 and diabetes with continued focus on platform optimization ? - Workforce reduction of approximately 38% ? - Anticipated cash runway extended into 2024 ? Cambridge, MA ? December 13, 2021?Sigilon Therapeutics, Inc. (NASDAQ: SGTX), a biotechnology company that seeks to develop functional cures

November 29, 2021 EX-99.1

Sigilon Therapeutics Announces Update on SIG-001 Phase 1/2 Study in Hemophilia A

Exhibit 99.1 Sigilon Therapeutics Announces Update on SIG-001 Phase 1/2 Study in Hemophilia A Cambridge, MA? November 29, 2021?Sigilon Therapeutics, Inc. (NASDAQ:SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded Living Therapeutics? platform, today reported that fibrosed spheres were observed during a retrieval procedure in a patient in

November 29, 2021 8-K

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): November 29, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commissio

November 10, 2021 EX-10.1

Fifth Amendment to Exclusive Patent License Agreement, by and between Massachusetts Institute of Technology and Sigilon Therapeutics, Inc., dated September 17, 2021 (incorporated by reference to Exhibit 10.1 to the Company’s Registration Statement on Form 10-Q for the quarter ended September 30, 2021 (File No. 001-39746))

Exhibit 10.1 ? CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND IS THE TYPE THAT THE COMPANY TREATS AS PRIVATE OR CONFIDENTIAL. ? Massachusetts Institute of Technology ? and ? Sigilon Therapeutics, Inc. ? FIFTH AMENDMENT ? This Fifth Amendment (?Fifth Amendment?), effective as of September 17, 2021 (the ?Fifth Amendment E

November 10, 2021 10-Q

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

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 10, 2021 EX-99.1

Sigilon Therapeutics Reports Third Quarter 2021 Financial Results and Business Highlights Company expects to complete its investigation of the clinical hold on its Phase 1/2 trial of SIG-001 in hemophilia A by year-end On track to initiate a Phase 1/

Exhibit 99.1 Sigilon Therapeutics Reports Third Quarter 2021 Financial Results and Business Highlights ? Company expects to complete its investigation of the clinical hold on its Phase 1/2 trial of SIG-001 in hemophilia A by year-end ? On track to initiate a Phase 1/2 trial of SIG-005 for MPS-1 in the fourth quarter of 2021 ? Company appoints May Orfali, M.D., M.B.A, as Chief Medical Officer ? Cam

November 10, 2021 8-K

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 10, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commissio

August 10, 2021 8-K

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 10, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission

August 10, 2021 EX-10.1

Consulting Agreement between Sigilon Therapeutics, Inc. and Devyn Smith, dated April 26, 2021

Exhibit 10.1 Consulting Agreement This Consulting Agreement (the ?Agreement?), made effective as of April 26, 2021, is entered into by Sigilon Therapeutics, Inc. (the ?Company?), with offices at 100 Binney Street, Suite 600, Cambridge, MA 02142 and Devn Smith, Ph.D. (the ?Consultant?). In consideration of the mutual covenants and promises contained herein and other good and valuable consideration,

August 10, 2021 EX-99.2

Advancing Potential Functional Cures for Patients With Chronic Diseases ©2021 Sigilon Therapeutics, Inc. August 2021 0 Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (“we,” “us,” “our,” “Sigilon” or the “Company”) and is

Exhibit 99.2 Advancing Potential Functional Cures for Patients With Chronic Diseases ?2021 Sigilon Therapeutics, Inc. August 2021 0 Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (?we,? ?us,? ?our,? ?Sigilon? or the ?Company?) and is made for informational purposes only and not for any other purpose. Certain information contained in this presentation and statements ma

August 10, 2021 10-Q

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

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

August 10, 2021 EX-99.1

Sigilon Therapeutics Reports Second Quarter 2021 Financial Results and Business Highlights

Exhibit 99.1 Sigilon Therapeutics Reports Second Quarter 2021 Financial Results and Business Highlights ? Cambridge, MA?August 10, 2021?Sigilon Therapeutics, Inc. (NASDAQ:SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded Living Therapeutics? platform, today reported financial results for the second quarter ended June 30, 2021 as well as

July 9, 2021 8-K

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): July 7, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IR

July 9, 2021 EX-99.1

Sigilon Therapeutics Announces Clinical Hold on SIG-001 Phase 1/2 Study in Hemophilia A

Exhibit 99.1 Sigilon Therapeutics Announces Clinical Hold on SIG-001 Phase 1/2 Study in Hemophilia A Cambridge, MA?July 9, 2021?Sigilon Therapeutics, Inc. (NASDAQ:SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded Living Therapeutics? platform, today reported that the U.S. Food and Drug Administration (FDA) has notified the Company that

June 28, 2021 8-K

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 24, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (I

June 16, 2021 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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): June 14, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (I

June 16, 2021 EX-99.1

Sigilon Therapeutics Appoints Brooke Story, M.B.A., to its Board of Directors

Exhibit 99.1 Sigilon Therapeutics Appoints Brooke Story, M.B.A., to its Board of Directors Cambridge, MA?June 16, 2021?Sigilon Therapeutics, Inc. (NASDAQ:SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded Living Therapeutics? platform, today announced the appointment of Brooke Story to its Board of Directors. ?I am delighted to welcome B

June 14, 2021 EX-99.1

Sigilon Therapeutics Appoints Philip Ashton-Rickardt, Ph.D., as Chief Scientific Officer

Exhibit 99.1 Sigilon Therapeutics Appoints Philip Ashton-Rickardt, Ph.D., as Chief Scientific Officer Cambridge, MA?June 14, 2021?Sigilon Therapeutics, Inc. (NASDAQ:SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded Living Therapeutics? platform, today announced the appointment of Philip Ashton-Rickardt, Ph.D., as Chief Scientific Office

June 14, 2021 8-K

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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): June 10, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (I

May 10, 2021 8-K

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 10, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (IR

May 10, 2021 EX-99.1

Sigilon Therapeutics Reports First Quarter 2021 Financial Results and Business Highlights

Exhibit 99.1 ? Sigilon Therapeutics Reports First Quarter 2021 Financial Results and Business Highlights ? Cambridge, MA?May 10, 2021?Sigilon Therapeutics, Inc. (NASDAQ:SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded Living Therapeutics? platform, today reported financial results for the first quarter ended March 31, 2021 as well as c

May 10, 2021 EX-99.2

Advancing Potential Functional Cures for Patients With Chronic Diseases ©2021 Sigilon Therapeutics, Inc. May 2021 Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (“we,” “us,” “our,” “Sigilon” or the “Company”) and is made

Exhibit 99.2 Advancing Potential Functional Cures for Patients With Chronic Diseases ?2021 Sigilon Therapeutics, Inc. May 2021 Disclaimer This presentation has been prepared by Sigilon Therapeutics, Inc. (?we,? ?us,? ?our,? ?Sigilon? or the ?Company?) and is made for informational purposes only and not for any other purpose. Certain information contained in this presentation and statements made or

May 10, 2021 10-Q

Quarterly Report - 10-Q

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 27, 2021 DEF 14A

- DEF 14A

Table of Contents 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 (Amendment No. ) ? ? 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 permitte

April 27, 2021 DEFA14A

- DEFA14A

? ? 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 (Amendment No. ) ? ? 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-

March 18, 2021 EX-99.1

Sigilon Therapeutics Reports Fourth Quarter and Full Year 2020 Financial Results and Business Highlights

Exhibit 99.1 Sigilon Therapeutics Reports Fourth Quarter and Full Year 2020 Financial Results and Business Highlights Cambridge, MA—March 18, 2021—Sigilon Therapeutics, Inc. (NASDAQ:SGTX), a biotechnology company that seeks to develop functional cures for chronic diseases through its Shielded Living Therapeutics™ platform, today reported financial results for the fourth quarter and full year ended

March 18, 2021 S-8

- S-8

As filed with the Securities and Exchange Commission on March 18, 2021 Registration No.

March 18, 2021 EX-21.1

Subsidiaries of the Registrant

Exhibit 21.1 Sigilon Therapeutics Inc. ? ? ? Subsidiary ? State or Other Jurisdiction of Incorporation or Organization Sigilon Securities Corporation ? Massachusetts ?

March 18, 2021 EX-10.5

Second Amendment to Lease, by and among ARE-MA Region No. 45, LLC and Sigilon Therapeutics, Inc., dated January 19, 2021 (incorporated by reference to Exhibit 10.5 to the Company’s Registration Statement on Form 10-K for the year ended December 31, 2021 (File No. 001-39746))

Exhibit 10.5 ? SECOND AMENDMENT TO LEASE THIS SECOND AMENDMENT TO LEASE (this ?Second Amendment?) is entered into as of January 19, 2021, by and between ARE-MA REGION NO. 45, LLC, a Delaware limited liability company (?Landlord?), and SIGILON THERAPEUTICS, INC., a Delaware corporation (?Tenant?). RECITALS: A.Landlord and Tenant are now parties to that certain Lease Agreement originally between Lan

March 18, 2021 EX-10.11

Fourth Amendment to Exclusive Patent License Agreement, by and between Massachusetts Institute of Technology and Sigilon Therapeutics, Inc., dated December 10, 2020 (incorporated by reference to Exhibit 10.11 to the Company’s Registration Statement on Form 10-K for the year ended December 31, 2021 (File No. 001-39746))

Exhibit 10.11 ? CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. ? Massachusetts Institute of Technology and Sigilon Therapeutics, Inc. ? FOURTH AMENDMENT ? This Fourth Amendment ("Fourth Amendment)", effective as of December 10, 2020

March 18, 2021 8-K

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 18, 2021 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) ? ? ? ? Delaware 001-39746 47-4005543 (State or other jurisdiction (Commission (

March 18, 2021 EX-4.5

Description of Registered Securities Pursuant to Section 12 of the Securities Exchange Act of 1934 (incorporated by reference to Exhibit 4.5 to the Company’s Registration Statement on Form 10-K for the year ended December 31, 2021 (File No. 001-39746))

Exhibit 4.5 DESCRIPTION OF THE REGISTRANT?S SECURITIES The following summary description of the Common Stock (as defined below) of Sigilon Therapeutics, Inc., or the Corporation, is based on the provisions of the Corporation?s fifth amended and restated certificate of incorporation (the ?Amended and Restated Certificate?) and amended and restated by-laws (the ?Amended and Restated By-laws?) and th

March 18, 2021 10-K

Annual Report - 10-K

Table of Contents ? UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

February 16, 2021 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Sigilon Therapeutics, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of S

SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Sigilon Therapeutics, Inc. (Name of Issuer) Common Stock, $0.001 par value per share (Title of Class of Securities) 82657L 10 7 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to de

February 12, 2021 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Sigilon Therapeutics, Inc. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) (CUSIP Number) De

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 Sigilon Therapeutics, Inc. (Name of Issuer) Common Stock, $0.001 par value (Title of Class of Securities) 82657L107 (CUSIP Number) December 31, 2020 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which th

December 14, 2020 S-8

- FORM S-8

As filed with the Securities and Exchange Commission on December 14, 2020 Registration No.

December 8, 2020 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits - 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): December 8, 2020 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 001-39746 47-4005543 (State or other jurisdiction of incorporation) (Commis

December 8, 2020 EX-3.1

Fifth Amended and Restated Certificate of Incorporation of Sigilon Therapeutics, Inc. (incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed with the SEC on December 8, 2020)

Exhibit 3.1 Fifth AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SIGILON Therapeutics, Inc. Sigilon Therapeutics, Inc., a Delaware corporation (the “Corporation”), hereby certifies that this Fifth Amended and Restated Certificate of Incorporation has been duly adopted in accordance with Sections 242 and 245 of the General Corporation Law of the State of Delaware (the “DGCL”), and that: A. Th

December 8, 2020 EX-3.2

Amended and Restated Bylaws of Sigilon Therapeutics, Inc. (incorporated by reference to Exhibit 3.2 to the Company’s Current Report on Form 8-K filed with the SEC on December 8, 2020)

Exhibit 3.2 SIGILON therapeutics, INC. AMENDED AND RESTATED BYLAWS SECTION 1 - STOCKHOLDERS Section 1.1. Annual Meeting. An annual meeting of the stockholders of Sigilon Therapeutics, Inc., a Delaware corporation (the “Corporation”), for the election of directors to succeed those whose terms expire and for the transaction of such other business as may properly come before the meeting shall be held

December 7, 2020 424B4

7,000,000 shares Sigilon Therapeutics, Inc. Common stock

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents Filed Pursuant to Rule 424(b)(4) Registration No.

December 4, 2020 S-1MEF

- S-1MEF

As filed with the Securities and Exchange Commission on December 3, 2020 Registration No.

December 1, 2020 CORRESP

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December 1, 2020 U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Attn: Julia Griffith Re: Sigilon Therapeutics, Inc. Registration Statement on Form S-1 File No. 333-250070 Acceleration Request Requested Date: December 3, 2020 Requested Time: 4:00 p.m., Eastern Standard Time Ladies and Gentlemen: In accordance with Rule 461 under the

December 1, 2020 CORRESP

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SIGILON THERAPEUTICS, INC. 100 Binney Street, Suite 600 Cambridge, MA 02142 December 1, 2020 VIA EDGAR Securities and Exchange Commission Division of Corporate Finance 100 F Street, N.E. Washington, D.C. 20549 Attention: Julia Griffith and Dietrich King, Division of Corporation Finance Re: Sigilon Therapeutics, Inc. Registration Statement on Form S-1 (File No. 333-250070) Request for Acceleration

November 30, 2020 8-A12B

Form 8-A

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 SIGILON THERAPEUTICS, INC. (Exact name of registrant as specified in its charter) Delaware 47-4005543 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification

November 30, 2020 EX-10.25

Form of Non-Statutory Stock Option Agreement (Non-Employee Directors) (incorporated by reference to Exhibit 10.25 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.25 Name: Number of Shares of Stock subject to the Stock Option: Exercise Price Per Share: $ Date of Grant: [Vesting Commencement Date:] SIGILON THERAPEUTICS, INC. 2020 EQUITY INCENTIVE PLAN NON-STATUTORY STOCK OPTION AGREEMENT (NON-EMPLOYEE DIRECTORS) This agreement (this “Agreement”) evidences a stock option granted by Sigilon Therapeutics, Inc. (the “Company”) to the individual named

November 30, 2020 S-1/A

- S-1/A

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents As filed with the Securities and Exchange Commission on November 30, 2020.

November 30, 2020 EX-3.5

Form of Amended and Restated By-laws of Sigilon Therapeutics, Inc. (to be effective upon the closing of this offering)

Exhibit 3.5 SIGILON THERAPEUTICS, INC. AMENDED AND RESTATED BYLAWS SECTION 1 - STOCKHOLDERS Section 1.1. Annual Meeting. An annual meeting of the stockholders of Sigilon Therapeutics, Inc., a Delaware corporation (the “Corporation”), for the election of directors to succeed those whose terms expire and for the transaction of such other business as may properly come before the meeting shall be held

November 30, 2020 EX-10.26

Form of Non-Statutory Stock Option Agreement (Employees) (incorporated by reference to Exhibit 10.26 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.26 Name: Number of Shares of Stock subject to the Stock Option: Exercise Price Per Share: $ Date of Grant: [Vesting Commencement Date:] SIGILON THERAPEUTICS, INC. 2020 EQUITY INCENTIVE PLAN NON-STATUTORY STOCK OPTION AGREEMENT This agreement (this “Agreement”) evidences a stock option granted by Sigilon Therapeutics, Inc. (the “Company”) to the individual named above (the “Participant”)

November 30, 2020 EX-10.24

Sigilon Therapeutics, Inc. 2020 Equity Incentive Plan (previously filed as Exhibit 10.24 to the registration statement on Form S-1 (File No. 333-250070) and incorporated herein by reference).

Exhibit 10.24 SIGILON THERAPEUTICS, INC. 2020 EQUITY INCENTIVE PLAN 1. DEFINED TERMS Exhibit A, which is incorporated by reference, defines certain terms used in the Plan and includes certain operational rules related to those terms. 2. PURPOSE The Plan has been established to advance the interests of the Company by providing for the grant to Participants of Stock and Stock-based Awards. 3. ADMINI

November 30, 2020 EX-1.1

Form of Underwriting Agreement

Exhibit 1.1 [ ] Shares Sigilon Therapeutics, Inc. Common Stock, par value $0.001 UNDERWRITING AGREEMENT [ ], 2020 [ ], 2020 Morgan Stanley & Co. LLC Jefferies LLC c/o Morgan Stanley & Co. LLC 1585 Broadway New York, New York 10036 c/o Jefferies LLC 520 Madison Avenue New York, New York 10022 Ladies and Gentlemen: Sigilon Therapeutics, Inc., a Delaware corporation (the “Company”), proposes to issue

November 30, 2020 EX-10.28

Sigilon Therapeutics Inc. 2020 Employee Stock Purchase Plan (previously filed as Exhibit 10.28 to the registration statement on Form S-1 (File No. 333-250070) and incorporated herein by reference).

Exhibit 10.28 SIGILON THERAPEUTICS, INC. 2020 EMPLOYEE STOCK PURCHASE PLAN 1. Defined Terms Exhibit A, which is incorporated by reference, defines the terms used in the Plan and sets forth certain operational rules related to those terms. 2. Purpose of Plan The Plan is intended to enable Eligible Employees to use payroll deductions to purchase shares of Stock in offerings under the Plan, and there

November 30, 2020 EX-10.27

Form of Incentive Stock Option Agreement (incorporated by reference to Exhibit 10.27 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.27 Name: Number of Shares of Stock subject to the Stock Option: Exercise Price Per Share: $ Date of Grant: [Vesting Commencement Date:] SIGILON THERAPEUTICS, INC. 2020 EQUITY INCENTIVE PLAN INCENTIVE STOCK OPTION AGREEMENT This agreement (this “Agreement”) evidences a stock option granted by Sigilon Therapeutics, Inc. (the “Company”) to the individual named above (the “Participant”), pu

November 30, 2020 EX-3.3

Form of Fifth Amended and Restated Certificate of Incorporation of Sigilon Therapeutics, Inc. (to be effective upon the closing of this offering)

Exhibit 3.3 FIFTH AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SIGILON THERAPEUTICS, INC. Sigilon Therapeutics, Inc., a Delaware corporation (the “Corporation”), hereby certifies that this Fifth Amended and Restated Certificate of Incorporation has been duly adopted in accordance with Sections 242 and 245 of the General Corporation Law of the State of Delaware (the “DGCL”), and that: A. Th

November 30, 2020 EX-3.2

Certificate of Amendment to Fourth Amended and Restated Certificate of Incorporation of Sigilon Therapeutics, Inc.

Exhibit 3.2 CERTIFICATE OF AMENDMENT TO THE FOURTH AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SIGILON THERAPEUTICS, INC. Sigilon Therapeutics, Inc. (the “Corporation”), a corporation organized and existing under the laws of the State of Delaware, DOES HEREBY CERTIFY: FIRST: That the name of the Corporation is Sigilon Therapeutics, Inc.; that the Corporation was originally incorporated pu

November 24, 2020 CORRESP

-

ROPES & GRAY LLP PRUDENTIAL TOWER 800 BOYLSTON STREET BOSTON, MA 02199-3600 WWW.ROPESGRAY.COM William Michener 617-951-7247 [email protected] Submitted pursuant to a Request for Confidential Treatment Pursuant to 17 C.F.R. 200.83 FOIA Confidential Treatment Request The entity requesting confidential treatment is Sigilon Therapeutics, Inc. 100 Binney Street, Suite 600 Cambridge, MA 021

November 13, 2020 EX-10.11

Sigilon Therapeutics, Inc. 2016 Stock Option and Grant Equity Incentive Plan, as amended (incorporated by reference to Exhibit 10.11 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.11 As amended as of September 12, 2019 SIGILON THERAPEUTICS, INC. 2016 EQUITY INCENTIVE PLAN 1. DEFINED TERMS Exhibit A, which is incorporated by reference, defines the terms used in the Plan and sets forth certain operational rules related to those terms. 2. PURPOSE The Plan has been established to advance the interests of the Company by providing for the grant to Participants of Stock

November 13, 2020 EX-3.3

Bylaws of VL36, Inc.

Exhibit 3.3 BY-LAWS OF VL36, INC. TABLE OF CONTENTS Page ARTICLE I STOCKHOLDERS 1 1.1 Place of Meetings 1 1.2 Annual Meeting 1 1.3 Special Meetings 1 1.4 Notice of Meetings 1 1.5 Voting Li st 1 1.6 Quorum 2 1.7 Adjournments 2 1.8 Voting and Proxies 2 1.9 Action at Meeting 2 1.10 Conduct of Meetings 3 1.11 Action without Meeting 3 ARTICLE II DIRECTORS 4 2.1 General Powers 4 2.2 Number, Election and

November 13, 2020 EX-10.3

Assignment and Assumption of Lease, by and between Foghorn Therapeutics Inc. and Sigilon Therapeutics, Inc., dated October 21, 2019 (incorporated by reference to Exhibit 10.3 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.3 ASSIGNMENT AND ASSUMPTION OF LEASE This ASSIGNMENT AND ASSUMPTION OF LEASE (this “Assignment”), dated as of October 21, 2019, is made and entered into by and among FOGHORN THERAPEUTICS INC., a Delaware corporation (“Assignor”) and SIGILON THERAPEUTICS, INC., a Delaware corporation (“Assignee”). RECITALS WHEREAS, ARE-MA REGION NO. 45, LLC, a Delaware limited liability company, as landl

November 13, 2020 EX-10.7

First Amendment to Exclusive Patent License Agreement, by and between Massachusetts Institute of Technology and Sigilon Therapeutics, Inc., dated February 2, 2017 (incorporated by reference to Exhibit 10.7 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.7 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. FIRST AMENDMENT This First Amendment (“Amendment”), effective as of February 2, 2017, amends the Exclusive Patent License Agreement (the “Agreement”) dated February 8, 2016

November 13, 2020 EX-4.1

Specimen stock certificate evidencing shares of common stock (incorporated by reference to Exhibit 4.1 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 4.1 ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS# . COMMON STOCK PAR VALUE $0.001 COMMON STOCK Certificate Number ZQ00000000 Shares * * 000000 * * * * * * * * * * * * * * * * * * * * * 000000 * * * * * * * * * * * * * * * * * * * * * 000000 * * * * * * * * * * * * * * * * * * * * * 000000 * * * * * * * * * * * * * * * * * * * * * 000000 * * * * * * * * * * * * * * SIGILON THERAPEUTIC

November 13, 2020 EX-10.21

Sigilon Therapeutics, Inc. Amended and Restated Severance and Change in Control Policy (incorporated by reference to Exhibit 10.21 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.21 SIGILON THERAPEUTICS INC. AMENDED AND RESTATED SEVERANCE AND CHANGE IN CONTROL POLICY This Amended and Restated Severance and Change in Control Policy (the “Policy”) of Sigilon Therapeutics Inc. (the “Company”), effective as of April 17, 2020 and amended and restated as of October 7, 2020, sets forth the payments and benefits the Company intends to provide to certain employees of the

November 13, 2020 EX-10.6

Exclusive Patent License Agreement, by and between Massachusetts Institute of Technology and Sigilon Therapeutics, Inc., dated February 8, 2016 (incorporated by reference to Exhibit 10.6 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.6 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. MASSACHUSETTS INSTITUTE OF TECHNOLOGY AND SIGILON, INC. EXCLUSIVE PATENT LICENSE AGREEMENT TABLE OF CONTENTS TABLE OF CONTENTS ii R E C I T A L S 1 1. Definitions 2 2. Gran

November 13, 2020 EX-4.2

Third Amended and Restated Investors’ Rights Agreement, by and among Sigilon Therapeutics, Inc. and the investors party thereto, dated as of October 23, 2020 (incorporated by reference to Exhibit 4.2 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 4.2 SIGILON THERAPEUTICS, INC. THIRD AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT TABLE OF CONTENTS Page 1. Definitions 1 2. Registration Rights 5 2.1 Demand Registration 5 2.2 Company Registration 6 2.3 Underwriting Requirements 7 2.4 Obligations of the Company 8 2.5 Furnish Information 9 2.6 Expenses of Registration 10 2.7 Delay of Registration 10 2.8 Indemnification 10 2.9 Reports U

November 13, 2020 EX-10.1

Lease, by and between ARE-MA Region No. 45, LLC and Sigilon Therapeutics, Inc., dated August 28, 2017 (incorporated by reference to Exhibit 10.1 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.1 100 Binney, Cambridge, MA/Sigilon Therapeutics, Inc. LEASE AGREEMENT THIS LEASE AGREEMENT is made as of this 28 day of August, 2017, between ARE-MA REGION NO. 45, LLC, a Delaware limited liability company (“Landlord”), and SIGILON THERAPEUTICS, INC., a Delaware corporation (“Tenant”). BASIC LEASE PROVISIONS Address: 100 Binney Street, Cambridge, Massachusetts. Premises: That portion o

November 13, 2020 EX-10.18

Form of Non-Chief Executive Officer Severance Waiver and Offer Letter Amendment (incorporated by reference to Exhibit 10.18 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.18 SEVERANCE WAIVER AND LETTER AGREEMENT AMENDMENT WHEREAS, Sigilon Therapeutics, Inc. (the “Company”) and (the “Executive”) entered into a letter agreement dated for the purpose of establishing the terms and conditions of Executive’s employment (the “Letter Agreement”); WHEREAS, pursuant to Section 1(b) of the Letter Agreement, the Executive is eligible to receive an annual bonus deter

November 13, 2020 EX-10.19

Stock Restriction Agreement, between Sigilon Therapeutics, Inc. and Daniel G. Anderson, dated February 10, 2016

Exhibit 10.19 STOCK RESTRICTION AGREEMENT This STOCK RESTRICTION AGREEMENT (this “Agreement”) is dated as of the 10 day of February, 2016 (the “Effective Date”), between Sigilon, Inc., a Delaware corporation (the “Company”), and Daniel G. Anderson (the “Founder”) relating to shares of the Company’s common stock, par value $0.001 per share (“Common Stock”). The Company and the Founder are each refe

November 13, 2020 EX-10.14

Offer Letter, between Sigilon Therapeutics, Inc. and Rogerio Vivaldi Coelho, M.D., dated April 23, 2018 (incorporated by reference to Exhibit 10.14 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.14 Sigilon Therapeutics, Inc. 100 Binney St., Suite 600 Cambridge, MA 02142 April 23, 2018 Rogerio Vivaldi Dear Rogerio: On behalf of Sigilon Therapeutics, Inc. (the “Company”), I am delighted to offer you employment with the Company. Your initial position will be President and Chief Executive Officer. You will report to the Company’s Board of Directors (the “Board”), and remain on the

November 13, 2020 EX-10.4

Consent to Assignment and First Amendment to Lease, by and among ARE-MA Region No. 45, LLC, Foghorn Therapeutics Inc. and Sigilon Therapeutics, Inc., dated October 21, 2019 (incorporated by reference to Exhibit 10.4 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.4 CONSENT TO ASSIGNMENT AND FIRST AMENDMENT TO LEASE This Consent to Assignment and First Amendment to Lease (this “Consent”) is made as of October 21, 2019, between and among ARE-MA REGION NO. 45, LLC, a Delaware limited liability company (“Landlord”), FOGHORN THERAPEUTICS INC., a Delaware corporation (“Tenant”), and SIGILON THERAPEUTICS, INC., a Delaware corporation (“Assignee”), with

November 13, 2020 EX-10.2

Lease Agreement, by and between ARE-MA Region No. 45, LLC and Foghorn Therapeutics Inc., dated August 24, 2017 (incorporated by reference to Exhibit 10.2 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.2 LEASE AGREEMENT THIS LEASE AGREEMENT is made as of this 24th day of August, 2017, between ARE-MA REGION NO. 45, LLC, a Delaware limited liability company (“Landlord”), and FOGHORN THERAPEUTICS INC., a Delaware corporation (“Tenant”). BASIC LEASE PROVISIONS Address: 100 Binney Street, Cambridge, Massachusetts. Premises: That portion of the Project, containing approximately 21,372 renta

November 13, 2020 EX-3.1

Fourth Amended and Restated Certificate of Incorporation of Sigilon Therapeutics, Inc.

Exhibit 3.1 SIGILON THERAPEUTICS, INC. FOURTH AMENDED AND RESTATED CERTIFICATE OF INCORPORATION FOURTH AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SIGILON THERAPEUTICS, INC. (Pursuant to Sections 242 and 245 of the General Corporation Law of the State of Delaware) Sigilon Therapeutics, Inc. (the “Corporation”), a corporation organized and existing under and by virtue of the provisions of

November 13, 2020 EX-10.17

Severance Waiver and Offer Letter Amendment, between Sigilon Therapeutics, Inc. and Rogerio Vivaldi Coelho, M.D., dated October 26, 2020 (incorporated by reference to Exhibit 10.17 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.17 SEVERANCE WAIVER AND OFFER LETTER AMENDMENT WHEREAS, Sigilon Therapeutics, Inc. (the “Company”) and Rogerio Vivaldi Coelho (the “Executive”) entered into a letter agreement dated April 23, 2018 for the purpose of establishing the terms and conditions of Executive’s employment (the “Letter Agreement”); WHEREAS, the first paragraph of the Letter Agreement provides that the Executive wi

November 13, 2020 EX-10.23

Sigilon Therapeutics, Inc. Non-Employee Director Compensation Policy (incorporated by reference to Exhibit 10.23 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.23 SIGILON THERAPEUTICS, INC. NON-EMPLOYEE DIRECTOR COMPENSATION POLICY Effective as of the initial public offering (the “IPO”) of the common stock of Sigilon Therapeutics, Inc. (the “Company”), each individual who provides services to the Company as a director, other than a director who is employed by the Company or a subsidiary (a “Non-Employee Director”), shall be entitled to receive

November 13, 2020 EX-10.12

Form of Incentive Stock Option Agreement under the Sigilon Therapeutics, Inc. 2016 Equity Incentive Plan (incorporated by reference to Exhibit 10.12 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.12 SIGILON THERAPEUTICS, INC. INCENTIVE STOCK OPTION AGREEMENT GRANTED UNDER 2016 EQUITY INCENTIVE PLAN 1. Grant of Option. This Incentive Stock Option Agreement (the “Agreement”) evidences the grant by Sigilon Therapeutics, Inc., a Delaware corporation (the “Company”), on [ , 20 ] (the “Grant Date”) to [ ], an employee of the Company (the “Participant”), of an option to purchase, in wh

November 13, 2020 EX-10.5

Loan and Security Agreement, by and among Oxford Finance LLC, the Lenders party thereto, and Sigilon Therapeutics, Inc., dated September 2, 2020 (incorporated by reference to Exhibit 10.5 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.5 LOAN AND SECURITY AGREEMENT THIS LOAN AND SECURITY AGREEMENT (as the same may from time to time be amended, modified, supplemented or restated, this “Agreement”) dated as of September 2, 2020 (the “Effective Date”) among OXFORD FINANCE LLC, a Delaware limited liability company with an office located at 133 North Fairfax Street, Alexandria, Virginia 22314 (“Oxford”), as collateral agen

November 13, 2020 EX-4.5

Form of Warrant to Purchase Stock, between Sigilon Therapeutics, Inc. and Oxford Finance LLC, dated September 2, 2020 (incorporated by reference to Exhibit 4.5 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 4.5 THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE SECURITIES LAWS OF ANY STATE AND, EXCEPT AS SET FORTH IN SECTIONS 5.3 AND 5.4 BELOW, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND SUBSTAN

November 13, 2020 EX-10.13

Form of Nonstatutory Stock Option Agreement under the Sigilon Therapeutics, Inc. 2016 Equity Incentive Plan (incorporated by reference to Exhibit 10.13 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.13 SIGILON THERAPEUTICS, INC. NONSTATUTORY STOCK OPTION AGREEMENT GRANTED UNDER 2016 EQUITY INCENTIVE PLAN 1. Grant of Option. This Nonstatutory Stock Option Agreement (the “Agreement”) evidences the grant by Sigilon Therapeutics, Inc., a Delaware corporation (the “Company”), on [ , 20 ] (the “Grant Date”) to [ ], an employee, consultant or director of the Company (the “Participant”), o

November 13, 2020 EX-10.9

Third Amendment to Exclusive Patent License Agreement, by and between Massachusetts Institute of Technology and Sigilon Therapeutics, Inc., dated November 6, 2019 (incorporated by reference to Exhibit 10.9 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.9 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. Execution Version Massachusetts Institute of Technology and Sigilon Therapeutics, Inc. THIRD AMENDMENT This Third Amendment (“Third Amendment)”, effective as of November 6,

November 13, 2020 EX-10.15

Offer Letter, between Sigilon Therapeutics, Inc. and Glenn Reicin, dated May 8, 2019

Exhibit 10.15 Wednesday, May 8, 2019 Glenn Reicin [email protected] Dear Glenn, On behalf of Sigilon Therapeutics (the “Company”), a Flagship Pioneering Company, I am delighted to make this conditional offer of employment with the Company. This offer letter (the “Offer Letter”) and the accompanying documents and agreements summarize and set forth important terms about your employment with t

November 13, 2020 EX-10.20

Stock Restriction Agreement, between Sigilon Therapeutics, Inc. and Robert S. Langer, dated February 5, 2016

Exhibit 10.20 STOCK RESTRICTION AGREEMENT This STOCK RESTRICTION AGREEMENT (this “Agreement”) is dated as of the 5th day of February, 2016 (the “Effective Date”), between Sigilon, Inc., a Delaware corporation (the “Company”), and Robert S. Langer (the “Founder”) relating to shares of the Company’s common stock, par value $0.001 per share (“Common Stock”). The Company and the Founder are each refer

November 13, 2020 EX-10.22

Sigilon Therapeutics, Inc. 2020 Cash Incentive Plan (incorporated by reference to Exhibit 10.22 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.22 SIGILON THERAPEUTICS, INC. 2020 CASH INCENTIVE PLAN 1. DEFINED TERMS Exhibit A, which is incorporated by reference, defines certain terms used in the Plan and sets forth operational rules related to those terms. 2. PURPOSE The Plan has been established to advance the interests of the Company by providing for the grant of cash-based incentive Awards to Participants that will attract,

November 13, 2020 S-1

S-1 (File No. 333-250070)

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents As filed with the Securities and Exchange Commission on November 13, 2020.

November 13, 2020 EX-10.16

Offer Letter, between Sigilon, Inc. and Devyn Smith, dated March 25, 2017

Exhibit 10.16 March 25, 2017 Devyn Smith 23 Marlin Drive Groton, CT 06340 Dear Devyn: On behalf of Sigilon, Inc. (the “Company”), I am delighted to offer you employment with the Company. Your initial position will be Chief Operations Officer and Head of Strategy, reporting to the Company’s President and Chief Executive Officer (the “CEO”). This offer letter is subject to and will become effective

November 13, 2020 EX-4.4

Warrant to Purchase Stock, between Sigilon Therapeutics, Inc. and Pacific Western Bank, dated November 7, 2019

Exhibit 4.4 THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE SECURITIES LAWS OF ANY STATE, AND, EXCEPT AS SET FORTH HEREIN, MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER,

November 13, 2020 EX-10.8

Second Amendment to Exclusive Patent License Agreement, by and between Massachusetts Institute of Technology and Sigilon Therapeutics, Inc., dated August 9, 2018 (incorporated by reference to Exhibit 10.8 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.8 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. Massachusetts Institute of Technology and Sigilon Therapeutics, Inc. SECOND AMENDMENT This Second Amendment (“Second Amendment)”, effective as of August 9, 2018 (the “Secon

November 13, 2020 EX-10.10

Research Collaboration and Exclusive License Agreement, by and between Sigilon Therapeutics, Inc. and Eli Lilly and Company, dated April 2, 2018 (incorporated by reference to Exhibit 10.10 to the Company’s Registration Statement on Form S-1 (File No. 333-250070))

Exhibit 10.10 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. EXECUTION VERSION RESEARCH COLLABORATION AND EXCLUSIVE LICENSE AGREEMENT BY AND BETWEEN SIGILON THERAPEUTICS, INC. and ELI LILLY AND COMPANY April 2, 2018 Table of Content

November 13, 2020 EX-4.3

Warrant to Purchase Stock, between Sigilon Therapeutics, Inc. and Pacific Western Bank, dated January 24, 2018

Exhibit 4.3 THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE SECURITIES LAWS OF ANY STATE, AND, EXCEPT AS SET FORTH HEREIN, MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER,

October 30, 2020 EX-4.2

SIGILON THERAPEUTICS, INC. THIRD AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT

Exhibit 4.2 SIGILON THERAPEUTICS, INC. THIRD AMENDED AND RESTATED INVESTORS? RIGHTS AGREEMENT TABLE OF CONTENTS Page 1. Definitions 1 2. Registration Rights 5 2.1 Demand Registration 5 2.2 Company Registration 6 2.3 Underwriting Requirements 7 2.4 Obligations of the Company 8 2.5 Furnish Information 9 2.6 Expenses of Registration 10 2.7 Delay of Registration 10 2.8 Indemnification 10 2.9 Reports U

October 30, 2020 EX-3.3

BY-LAWS VL36, INC.

Exhibit 3.3 BY-LAWS OF VL36, INC. TABLE OF CONTENTS Page ARTICLE I STOCKHOLDERS 1 1.1 Place of Meetings 1 1.2 Annual Meeting 1 1.3 Special Meetings 1 1.4 Notice of Meetings 1 1.5 Voting Li st 1 1.6 Quorum 2 1.7 Adjournments 2 1.8 Voting and Proxies 2 1.9 Action at Meeting 2 1.10 Conduct of Meetings 3 1.11 Action without Meeting 3 ARTICLE II DIRECTORS 4 2.1 General Powers 4 2.2 Number, Election and

October 30, 2020 EX-3.1

SIGILON THERAPEUTICS, INC. FOURTH AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

Exhibit 3.1 SIGILON THERAPEUTICS, INC. FOURTH AMENDED AND RESTATED CERTIFICATE OF INCORPORATION FOURTH AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SIGILON THERAPEUTICS, INC. (Pursuant to Sections 242 and 245 of the General Corporation Law of the State of Delaware) Sigilon Therapeutics, Inc. (the ?Corporation?), a corporation organized and existing under and by virtue of the provisions of

October 30, 2020 EX-10.23

SIGILON THERAPEUTICS, INC. 2020 CASH INCENTIVE PLAN

Exhibit 10.23 SIGILON THERAPEUTICS, INC. 2020 CASH INCENTIVE PLAN 1. DEFINED TERMS Exhibit A, which is incorporated by reference, defines certain terms used in the Plan and sets forth operational rules related to those terms. 2. PURPOSE The Plan has been established to advance the interests of the Company by providing for the grant of cash-based incentive Awards to Participants that will attract,

October 30, 2020 EX-10.22

SIGILON THERAPEUTICS INC. AMENDED AND RESTATED SEVERANCE AND CHANGE IN CONTROL POLICY

Exhibit 10.22 SIGILON THERAPEUTICS INC. AMENDED AND RESTATED SEVERANCE AND CHANGE IN CONTROL POLICY This Amended and Restated Severance and Change in Control Policy (the ?Policy?) of Sigilon Therapeutics Inc. (the ?Company?), effective as of April 17, 2020 and amended and restated as of October 7, 2020, sets forth the payments and benefits the Company intends to provide to certain employees of the

October 30, 2020 EX-10.14

LEASE AGREEMENT

Exhibit 10.14 LEASE AGREEMENT THIS LEASE AGREEMENT is made as of this 24th day of August, 2017, between ARE-MA REGION NO. 45, LLC, a Delaware limited liability company (?Landlord?), and FOGHORN THERAPEUTICS INC., a Delaware corporation (?Tenant?). BASIC LEASE PROVISIONS Address: 100 Binney Street, Cambridge, Massachusetts. Premises: That portion of the Project, containing approximately 21,372 rent

October 30, 2020 EX-10.16

CONSENT TO ASSIGNMENT AND FIRST AMENDMENT TO LEASE

Exhibit 10.16 CONSENT TO ASSIGNMENT AND FIRST AMENDMENT TO LEASE This Consent to Assignment and First Amendment to Lease (this ?Consent?) is made as of October 21, 2019, between and among ARE-MA REGION NO. 45, LLC, a Delaware limited liability company (?Landlord?), FOGHORN THERAPEUTICS INC., a Delaware corporation (?Tenant?), and SIGILON THERAPEUTICS, INC., a Delaware corporation (?Assignee?), wit

October 30, 2020 EX-10.15

ASSIGNMENT AND ASSUMPTION OF LEASE

Exhibit 10.15 ASSIGNMENT AND ASSUMPTION OF LEASE This ASSIGNMENT AND ASSUMPTION OF LEASE (this ?Assignment?), dated as of October 21, 2019, is made and entered into by and among FOGHORN THERAPEUTICS INC., a Delaware corporation (?Assignor?) and SIGILON THERAPEUTICS, INC., a Delaware corporation (?Assignee?). RECITALS WHEREAS, ARE-MA REGION NO. 45, LLC, a Delaware limited liability company, as land

October 30, 2020 EX-10.19

[Signature Page Follows]

Exhibit 10.19 Wednesday, May 8, 2019 Glenn Reicin [email protected] Dear Glenn, On behalf of Sigilon Therapeutics (the ?Company?), a Flagship Pioneering Company, I am delighted to make this conditional offer of employment with the Company. This offer letter (the ?Offer Letter?) and the accompanying documents and agreements summarize and set forth important terms about your employment with t

October 30, 2020 EX-10.18

SEVERANCE WAIVER AND OFFER LETTER AMENDMENT

Exhibit 10.18 SEVERANCE WAIVER AND OFFER LETTER AMENDMENT WHEREAS, Sigilon Therapeutics, Inc. (the ?Company?) and Rogerio Vivaldi Coelho (the ?Executive?) entered into a letter agreement dated April 23, 2018 for the purpose of establishing the terms and conditions of Executive?s employment (the ?Letter Agreement?); WHEREAS, the first paragraph of the Letter Agreement provides that the Executive wi

October 30, 2020 EX-10.20

2

Exhibit 10.20 March 25, 2017 Devyn Smith 23 Marlin Drive Groton, CT 06340 Dear Devyn: On behalf of Sigilon, Inc. (the ?Company?), I am delighted to offer you employment with the Company. Your initial position will be Chief Operations Officer and Head of Strategy, reporting to the Company?s President and Chief Executive Officer (the ?CEO?). This offer letter is subject to and will become effective

October 30, 2020 EX-10.21

SEVERANCE WAIVER AND LETTER AGREEMENT AMENDMENT

Exhibit 10.21 SEVERANCE WAIVER AND LETTER AGREEMENT AMENDMENT WHEREAS, Sigilon Therapeutics, Inc. (the ?Company?) and (the ?Executive?) entered into a letter agreement dated for the purpose of establishing the terms and conditions of Executive?s employment (the ?Letter Agreement?); WHEREAS, pursuant to Section 1(b) of the Letter Agreement, the Executive is eligible to receive an annual bonus deter

October 30, 2020 DRS/A

As confidentially submitted with the Securities and Exchange Commission on October 30, 2020 as Amendment No. 2 to the Confidential Submission dated August 21, 2020. This draft registration statement has not been publicly filed with the Securities and

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents As confidentially submitted with the Securities and Exchange Commission on October 30, 2020 as Amendment No.

October 30, 2020 EX-10.17

Sigilon Therapeutics, Inc. 100 Binney St., Suite 600 Cambridge, MA 02142

Exhibit 10.17 Sigilon Therapeutics, Inc. 100 Binney St., Suite 600 Cambridge, MA 02142 April 23, 2018 Rogerio Vivaldi Dear Rogerio: On behalf of Sigilon Therapeutics, Inc. (the ?Company?), I am delighted to offer you employment with the Company. Your initial position will be President and Chief Executive Officer. You will report to the Company?s Board of Directors (the ?Board?), and remain on the

September 28, 2020 EX-10.13

LOAN AND SECURITY AGREEMENT

Exhibit 10.13 LOAN AND SECURITY AGREEMENT THIS LOAN AND SECURITY AGREEMENT (as the same may from time to time be amended, modified, supplemented or restated, this ?Agreement?) dated as of September 2, 2020 (the ?Effective Date?) among OXFORD FINANCE LLC, a Delaware limited liability company with an office located at 133 North Fairfax Street, Alexandria, Virginia 22314 (?Oxford?), as collateral age

September 28, 2020 DRS/A

As confidentially submitted with the Securities and Exchange Commission on September 25, 2020 as Amendment No. 1 to the Confidential Submission dated August 21, 2020. This draft registration statement has not been publicly filed with the Securities a

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents As confidentially submitted with the Securities and Exchange Commission on September 25, 2020 as Amendment No.

September 28, 2020 EX-4.5

WARRANT TO PURCHASE STOCK [—]

Exhibit 4.5 THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE ?ACT?), OR THE SECURITIES LAWS OF ANY STATE AND, EXCEPT AS SET FORTH IN SECTIONS 5.3 AND 5.4 BELOW, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND SUBSTAN

September 25, 2020 DRSLTR

-

ROPES & GRAY LLP PRUDENTIAL TOWER 800 BOYLSTON STREET BOSTON, MA 02199-3600 WWW.ROPESGRAY.COM September 25, 2020 Marc A. Rubenstein T +1 617 951 7826 [email protected] BY FEDEX and EDGAR Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549 Attention: Julia Griffith and Dietrich King Re: Sigilon Therapeutics, Inc. Draft Registratio

August 21, 2020 EX-10.4

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. Massachusetts Institute of Technolo

Exhibit 10.4 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. Massachusetts Institute of Technology and Sigilon Therapeutics, Inc. SECOND AMENDMENT This Second Amendment (?Second Amendment)?, effective as of August 9, 2018 (the ?Secon

August 21, 2020 EX-10.1

LEASE AGREEMENT

Exhibit 10.1 100 Binney, Cambridge, MA/Sigilon Therapeutics, Inc. LEASE AGREEMENT THIS LEASE AGREEMENT is made as of this 28 day of August, 2017, between ARE-MA REGION NO. 45, LLC, a Delaware limited liability company (?Landlord?), and SIGILON THERAPEUTICS, INC., a Delaware corporation (?Tenant?). BASIC LEASE PROVISIONS Address: 100 Binney Street, Cambridge, Massachusetts. Premises: That portion o

August 21, 2020 DRS

As confidentially submitted with the Securities and Exchange Commission on August 21, 2020

Use these links to rapidly review the document TABLE OF CONTENTS INDEX TO FINANCIAL STATEMENTS Table of Contents As confidentially submitted with the Securities and Exchange Commission on August 21, 2020 Registration No.

August 21, 2020 DRSLTR

-

ROPES & GRAY LLP PRUDENTIAL TOWER 800 BOYLSTON STREET BOSTON, MA 02199-3600 WWW.ROPESGRAY.COM Marc A. Rubenstein T +1 617 951 7826 [email protected] August 21, 2020 CONFIDENTIAL SUBMISSION VIA EDGAR U.S. Securities and Exchange Commission Division of Corporate Finance 100 F Street, NE Washington, DC 20549 RE: Confidential Submission of Sigilon Therapeutics, Inc. Draft Registration Stat

August 21, 2020 EX-4.2

SIGILON THERAPEUTICS, INC. SECOND AMENDED AND RESTATED INVESTORS’ RIGHTS AGREEMENT

Exhibit 4.2 SIGILON THERAPEUTICS, INC. SECOND AMENDED AND RESTATED INVESTORS? RIGHTS AGREEMENT TABLE OF CONTENTS Page 1. Definitions 1 2. Registration Rights 5 2.1 Demand Registration 5 2.2 Company Registration 6 2.3 Underwriting Requirements 7 2.4 Obligations of the Company 8 2.5 Furnish Information 9 2.6 Expenses of Registration 10 2.7 Delay of Registration 10 2.8 Indemnification 10 2.9 Reports

August 21, 2020 EX-4.4

WARRANT TO PURCHASE STOCK

Exhibit 4.4 THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE ?ACT?), OR THE SECURITIES LAWS OF ANY STATE, AND, EXCEPT AS SET FORTH HEREIN, MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER,

August 21, 2020 EX-10.3

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. FIRST AMENDMENT

Exhibit 10.3 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. FIRST AMENDMENT This First Amendment (?Amendment?), effective as of February 2, 2017, amends the Exclusive Patent License Agreement (the ?Agreement?) dated February 8, 2016

August 21, 2020 EX-4.3

WARRANT TO PURCHASE STOCK

Exhibit 4.3 THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE ?ACT?), OR THE SECURITIES LAWS OF ANY STATE, AND, EXCEPT AS SET FORTH HEREIN, MAY NOT BE SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER,

August 21, 2020 EX-10.5

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED.

Exhibit 10.5 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. Execution Version Massachusetts Institute of Technology and Sigilon Therapeutics, Inc. THIRD AMENDMENT This Third Amendment (?Third Amendment)?, effective as of November 6,

August 21, 2020 EX-3.1

SIGILON THERAPEUTICS, INC. THIRD AMENDED AND RESTATED CERTIFICATE OF INCORPORATION

Exhibit 3.1 SIGILON THERAPEUTICS, INC. THIRD AMENDED AND RESTATED CERTIFICATE OF INCORPORATION THIRD AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SIGILON THERAPEUTICS, INC. (Pursuant to Sections 242 and 245 of the General Corporation Law of the State of Delaware) Sigilon Therapeutics, Inc. (the ?Corporation?), a corporation organized and existing under and by virtue of the provisions of th

August 21, 2020 EX-3.2

CERTIFICATE OF AMENDMENT TO THE THIRD AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SIGILON THERAPEUTICS, INC. (Pursuant to Section 242 of the General Corporation Law of the State of Delaware)

Exhibit 3.2 CERTIFICATE OF AMENDMENT TO THE THIRD AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF SIGILON THERAPEUTICS, INC. (Pursuant to Section 242 of the General Corporation Law of the State of Delaware) Sigilon Therapeutics, Inc., a corporation organized and existing under and by virtue of the provisions of the General Corporation Law of the State of Delaware (the ?DGCL?), DOES HEREBY CER

August 21, 2020 EX-10.9

SIGILON THERAPEUTICS, INC. NONSTATUTORY STOCK OPTION AGREEMENT GRANTED UNDER 2016 EQUITY INCENTIVE PLAN

Exhibit 10.9 SIGILON THERAPEUTICS, INC. NONSTATUTORY STOCK OPTION AGREEMENT GRANTED UNDER 2016 EQUITY INCENTIVE PLAN 1. Grant of Option. This Nonstatutory Stock Option Agreement (the ?Agreement?) evidences the grant by Sigilon Therapeutics, Inc., a Delaware corporation (the ?Company?), on [ , 20 ] (the ?Grant Date?) to [ ], an employee, consultant or director of the Company (the ?Participant?), of

August 21, 2020 EX-10.7

SIGILON THERAPEUTICS, INC. 2016 EQUITY INCENTIVE PLAN

Exhibit 10.7 As amended as of September 12, 2019 SIGILON THERAPEUTICS, INC. 2016 EQUITY INCENTIVE PLAN 1. DEFINED TERMS Exhibit A, which is incorporated by reference, defines the terms used in the Plan and sets forth certain operational rules related to those terms. 2. PURPOSE The Plan has been established to advance the interests of the Company by providing for the grant to Participants of Stock-

August 21, 2020 EX-10.2

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. MASSACHUSETTS INSTITUTE OF TECHNOLO

Exhibit 10.2 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. MASSACHUSETTS INSTITUTE OF TECHNOLOGY AND SIGILON, INC. EXCLUSIVE PATENT LICENSE AGREEMENT TABLE OF CONTENTS TABLE OF CONTENTS ii R E C I T A L S 1 1. Definitions 2 2. Gran

August 21, 2020 EX-10.8

SIGILON THERAPEUTICS, INC. INCENTIVE STOCK OPTION AGREEMENT GRANTED UNDER 2016 EQUITY INCENTIVE PLAN

Exhibit 10.8 SIGILON THERAPEUTICS, INC. INCENTIVE STOCK OPTION AGREEMENT GRANTED UNDER 2016 EQUITY INCENTIVE PLAN 1. Grant of Option. This Incentive Stock Option Agreement (the ?Agreement?) evidences the grant by Sigilon Therapeutics, Inc., a Delaware corporation (the ?Company?), on [ , 20 ] (the ?Grant Date?) to [ ], an employee of the Company (the ?Participant?), of an option to purchase, in who

August 21, 2020 EX-10.6

CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED.

Exhibit 10.6 CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY [***], HAS BEEN OMITTED BECAUSE IT IS NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO SIGILON THERAPEUTICS, INC. IF PUBLICLY DISCLOSED. EXECUTION VERSION RESEARCH COLLABORATION AND EXCLUSIVE LICENSE AGREEMENT BY AND BETWEEN SIGILON THERAPEUTICS, INC. and ELI LILLY AND COMPANY April 2, 2018 Table of Contents

August 21, 2020 EX-10.11

STOCK RESTRICTION AGREEMENT

Exhibit 10.11 STOCK RESTRICTION AGREEMENT This STOCK RESTRICTION AGREEMENT (this ?Agreement?) is dated as of the 10 day of February, 2016 (the ?Effective Date?), between Sigilon, Inc., a Delaware corporation (the ?Company?), and Daniel G. Anderson (the ?Founder?) relating to shares of the Company?s common stock, par value $0.001 per share (?Common Stock?). The Company and the Founder are each refe

August 21, 2020 EX-10.10

SIGILON THERAPEUTICS INC. SEVERANCE AND CHANGE IN CONTROL POLICY

Exhibit 10.10 Execution Version SIGILON THERAPEUTICS INC. SEVERANCE AND CHANGE IN CONTROL POLICY This Severance and Change in Control Policy (the ?Policy?) of Sigilon Therapeutics Inc. (the ?Company?), effective as of April 17, 2020, set forth the payments and benefits the Company intends to provide to certain employees of the Company and its subsidiaries at the level of Vice President and higher

August 21, 2020 EX-10.12

STOCK RESTRICTION AGREEMENT

Exhibit 10.12 STOCK RESTRICTION AGREEMENT This STOCK RESTRICTION AGREEMENT (this ?Agreement?) is dated as of the 5th day of February, 2016 (the ?Effective Date?), between Sigilon, Inc., a Delaware corporation (the ?Company?), and Robert S. Langer (the ?Founder?) relating to shares of the Company?s common stock, par value $0.001 per share (?Common Stock?). The Company and the Founder are each refer

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