13D Filings
SYNLOGIC, INC.
SYBX
Amendment
Ownership

28.30%

Total Shares

3,312,219

Issuer CIK

1527599

Event Date

Apr 1, 2026

Accepted

Apr 6, 2026, 04:15 PM

Reporting Persons (3)
Joint Filing

This is a joint filing. The reported shares may overlap between reporting persons and should not be summed.

NameType% of ClassAggregateSole VotingShared Voting
Funicular Funds, LP
Partnership
28.30%3,312,2193,312,2190
Cable Car Capital, LP
Investment Adviser
28.30%3,312,2193,312,2190
Ma-Weaver Jacob
Individual
28.30%3,312,2193,312,2190
Disclosure Items (6)

Security Title

Common Stock, par value $0.001 per share

Issuer Name

SYNLOGIC, INC.

Issuer Address

PO BOX 30, WINCHESTER, MA, 01890

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 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(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 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 is hereby amended to add the following exhibit: 99.1 - Proposal, dated April 2, 2026.

SYNLOGIC, INC. — Schedule 13D | 13D Filings