Beneficial Ownership Report · SCHEDULE 13D/A
SYNLOGIC INC
Beneficial Ownership Report
Structured filing — SCHEDULE 13D/A
primary_doc.xml
Amendment · This filing reports the amendment as submitted.
Subject company
- Company
- SYNLOGIC, INC.
- Company CIK
- 0001527599
- Street
- PO BOX 30
- City
- WINCHESTER
- State / country code
- MA
- Postal code
- 01890
Statement details
- Amendment number
- 1
- Security class
- Common Stock, par value $0.001 per share
- Event date
- 04/02/2026
- Previously filed indication
- false
Authorized notification person 1
- Name
- JACOB MA-WEAVER
- Phone
- 415-857-1965
- Street
- CABLE CAR CAPITAL, LP
- Street (continued)
- 601 California Street, Suite 1151
- City
- San Francisco
- State / country code
- CA
- Postal code
- 94108
Authorized notification person 2
- Name
- ANDREW FREEDMAN, ESQ.
- Phone
- 212-451-2300
- Street
- OLSHAN FROME WOLOSKY LLP
- Street (continued)
- 1325 Avenue of the Americas
- City
- New York
- State / country code
- NY
- Postal code
- 10019
Reporting person 1
- Name
- Funicular Funds, LP
- Reporting person CIK
- 0001937147
- No reporting person CIK indication
- N
- Citizenship / organization
- DE
- Reporting person type
- PN
- Source of funds code
- WC
- Legal proceedings indication
- N
- Aggregate amount owned
- 3,312,219.00
- Percent of class
- 28.3
- Sole voting power
- 3,312,219.00
- Shared voting power
- 0.00
- Sole dispositive power
- 3,312,219.00
- Shared dispositive power
- 0.00
- Aggregate excludes certain shares
- N
Reporting person 2
- Name
- Cable Car Capital, LP
- Reporting person CIK
- 0001699575
- No reporting person CIK indication
- N
- Citizenship / organization
- DE
- Reporting person type
- IA · PN
- Source of funds code
- AF
- Legal proceedings indication
- N
- Aggregate amount owned
- 3,312,219.00
- Percent of class
- 28.3
- Sole voting power
- 3,312,219.00
- Shared voting power
- 0.00
- Sole dispositive power
- 3,312,219.00
- Shared dispositive power
- 0.00
- Aggregate excludes certain shares
- N
- Comments
- Formerly known as Cable Car Capital LLC
Reporting person 3
- Name
- Ma-Weaver Jacob
- Reporting person CIK
- 0001922140
- No reporting person CIK indication
- N
- Citizenship / organization
- X1
- Reporting person type
- IN
- Source of funds code
- OO
- Legal proceedings indication
- N
- Aggregate amount owned
- 3,312,219.00
- Percent of class
- 28.3
- Sole voting power
- 3,312,219.00
- Shared voting power
- 0.00
- Sole dispositive power
- 3,312,219.00
- Shared dispositive power
- 0.00
- Aggregate excludes certain shares
- N
Item 1
Issuer
SYNLOGIC, INC.
Security title
Common Stock, par value $0.001 per share
Principal address
Comment
The following constitutes Amendment No. 1 to the Schedule 13D filed by the undersigned ("Amendment No. 1") relating to the Common Stock, par value $0.001 per share (the "Shares"), of Synlogic, Inc. (the "Issuer"). This Amendment No. 1 amends the Schedule 13D filed by the Reporting Persons as specifically set forth herein. Capitalized terms used but not otherwise defined herein have the meanings ascribed to such terms in the Schedule 13D.
Item 2
Principal business address
Item 2(b) is hereby amended to read as follows: Cable Car is an SEC registered investment adviser and serves as the general partner of the Fund.
Item 4
Purpose of transaction
Item 4 is hereby amended to add the following: On April 2, 2026, the Reporting Persons delivered a letter to the Board of Directors of the Issuer setting forth a non-binding proposal (the "Proposal") to acquire all outstanding Shares not already owned by the Reporting Persons for $0.64 per share in cash. The foregoing description of the Proposal does not purport to be complete and is qualified in its entirety by reference to the Proposal, which is attached as Exhibit 99.1 hereto and is incorporated by reference herein.
Item 5
Percentage of class
Item 5(a) is hereby amended and restated to read as follows: The aggregate percentage of Shares reported owned by the Reporting Persons is based on 11,698,919 Shares outstanding as of March 5, 2026, which is the total number of Shares outstanding as reported in the Issuer's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 12, 2026. As of the date hereof, the Fund beneficially owned 3,312,219 Shares, constituting approximately 28.3% of the Issuer's outstanding Shares. Cable Car, as the General Partner of the Fund, may be deemed the beneficial owner of the 3,312,219 Shares owned by the Fund. Mr. Ma-Weaver, as the Managing Member of Cable Car, may be deemed the beneficial owner of the 3,312,219 Shares owned by the Fund.
Item 6
Contracts and arrangements
Item 6 is hereby amended to add the following: On April 2, 2026, the Reporting Persons submitted the Proposal defined and described in Item 4 above and attached as Exhibit 99.1 hereto.
Item 7
Filed exhibits
Item 7 is hereby amended to add the following exhibit: 99.1 - Proposal, dated April 2, 2026.
Signature 1
- Reporting person
- Funicular Funds, LP
- Signed
- /s/ Jacob Ma-Weaver
- Title
- Jacob Ma-Weaver, Managing Member
- Date
- 04/06/2026
Signature 2
- Reporting person
- Cable Car Capital, LP
- Signed
- /s/ Jacob Ma-Weaver
- Title
- Jacob Ma-Weaver, Managing Member
- Date
- 04/06/2026
Signature 3
- Reporting person
- Ma-Weaver Jacob
- Signed
- /s/ Jacob Ma-Weaver
- Title
- Jacob Ma-Weaver
- Date
- 04/06/2026
Filed exhibits
- PROPOSAL, DATED APRIL 2, 2026. ↗ex991to13da113392005_040626.pdf
Company context
Synlogic is a biopharmaceutical company historically focused on advancing novel therapeutics to transform the care of serious disease in need of new treatment options.