SC 13G: SYNLOGIC, INC.

AI Summary

SC 13G filing by SYNLOGIC, INC..

Risk Assessment

Risk Level: low

FAQ

Key Financial Figures

• $0.001 — ame of Issuer) Common Stock, par value $0.001 per share (Title of Class of Securitie

Filing Documents

• sc13g09076039_04182024.htm (SC 13G) — 55KB
• 0000921895-24-000872.txt ( ) — 56KB

(a). Name of Issuer

Item 1(a). Name of Issuer: Synlogic, Inc., a Delaware corporation (the “Issuer”).

(b). Address of Issuer’s Principal Executive Offices

Item 1(b). Address of Issuer’s Principal Executive Offices: 301 Binney Street, Suite 402 Cambridge, Massachusetts 02142

(a). Name of Person Filing

Item 2(a). Name of Person Filing: This statement is filed by Bradley L. Radoff.

(b). Address of Principal Business Office or, if None, Residence

Item 2(b). Address of Principal Business Office or, if None, Residence: The address of the principal office of Mr. Radoff is 2727 Kirby Drive, Unit 29L, Houston, Texas 77098.

(c). Citizenship

Item 2(c). Citizenship: Mr. Radoff is a citizen of the United States of America.

(d). Title of Class of Securities

Item 2(d). Title of Class of Securities: Common Stock, par value $0.001 per share (the “Shares”).

(e). CUSIP Number

Item 2(e). CUSIP Number: 87166L209 3 CUSIP No. 87166L209

If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a

Item 3. If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a: /x/ Not applicable. (a) / / Broker or dealer registered under Section 15 of the Exchange Act. (b) / / Bank as defined in Section 3(a)(6) of the Exchange Act. (c) / / Insurance company as defined in Section 3(a)(19) of the Exchange Act. (d) / / Investment company registered under Section 8 of the Investment Company Act. (e) / / An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E). (f) / / An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F). (g) / / A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G). (h) / / A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act. (i) / / A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act. (j) / / Non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J). (k) / / Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J), please specify the type of institution: ____

Ownership

Item 4. Ownership. (a) Amount beneficially owned: As of the date hereof, Mr. Radoff directly beneficially owns 629,211 Shares. (b) Percent of class: The following percentage is based on 11,646,977 Shares outstanding as of March 12, 2024, which is the total number of Shares outstanding as disclosed in the Issuer’s Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 19, 2024. As of the date hereof, Mr. Radoff beneficially owns approximately 5.4% of the outstanding Shares. (c) Number of shares as to which such person has: (i) Sole power to vote or to direct the vote: See Cover Pages Items 5-9. (ii) Shared power to vote or to direct the vote: See Cover Pages Items 5-9. 4 CUSIP No. 87166L209 (iii) Sole power to dispose or to direct the disposition of: See Cover Pages Items 5-9. (iv) Shared power to dispose or to direct the disposition of: See Cover Pages Items 5-9.

Ownership of Five Percent or Less of a Class

Item 5. Ownership of Five Percent or Less of a Class. Not Applicable.

Ownership of More than Five Percent on Behalf of Another Person

Item 6. Ownership of More than Five Percent on Behalf of Another Person. Not Applicable. Item 7. Identification and Classification of the Subsidiary That Acquired the Security Being Reported on by the Parent Holding Company or Control Person. Not Applicable.

Identification and Classification of Members of the Group

Item 8. Identification and Classification of Members of the Group. Not Applicable.

Notice of Dissolution of Group

Item 9. Notice of Dissolution of Group. Not Applicable.

Certifications

Item 10. Certifications. By signing below the undersigned certifies that, to the best of his knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. 5 CUSIP No. 87166L209 SIGNATURE After reasonable inquiry and to the best of his knowledge and belief, the undersigned certifies that the information set forth in this statement is true, complete and correct. Dated: April 18, 2024 /s/ Bradley L. Radoff Bradley L. Radoff 6

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