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Synlogic, Inc. (SYBX) holders commit 28.3% stake to Caldera merger

(Moderate)
(Neutral)
Form Type
SCHEDULE 13D/A

Rhea-AI Filing Summary

Funicular Funds, Cable Car Capital and Jacob Ma‑Weaver report beneficial ownership of 3,312,219 shares of Synlogic, Inc. common stock, representing 28.3% of the outstanding class, with sole voting and dispositive power, based on common stock with par value $0.001 per share.

On July 28, 2026, Synlogic agreed to an Agreement and Plan of Merger with Caldera Therapeutics and related entities. The reporting persons entered a Support Agreement committing to vote all their shares for the merger, oppose competing proposals, restrict transfers and proxies, forego appraisal rights, and grant an irrevocable proxy to Synlogic, subject to termination if the merger agreement ends.

Positive

  • None.

Negative

  • None.

Filing Explained

The support commitment disclosed in this amendment is conditional rather than permanent: its voting, transfer, proxy, and appraisal-right restrictions end in specified circumstances, including valid termination of the merger agreement or written agreement by the parties.

Beneficial ownership 3,312,219 shares Synlogic, Inc. common shares beneficially owned by each reporting person
Ownership percentage 28.3% Percent of Synlogic common stock class represented by 3,312,219 shares
Par value $0.001 per share Par value of Synlogic, Inc. common stock
Date of event July 28, 2026 Date of the event requiring the Schedule 13D/A Amendment No. 2 filing
Form 8-K filing date July 29, 2026 Date Synlogic filed Form 8-K describing the Merger Agreement
Agreement and Plan of Merger regulatory
"On July 28, 2026, the Issuer entered into an Agreement and Plan of Merger by and among the parties"
An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.
Support Agreement regulatory
"the Reporting Persons entered into a Support Agreement with Caldera and the Issuer"
A support agreement is a written commitment in which one or more parties promise to take specific actions—such as lending money, voting a certain way, or providing other help—to back a corporate deal, restructuring or financing. For investors it matters because these promises raise the chances a plan will succeed and reduce uncertainty about who will pay or vote for what; think of it like neighbors formally agreeing to chip in and carry out a shared repair so everyone knows it will get done.
irrevocable proxy regulatory
"The Reporting Persons have, subject to certain conditions, also granted an irrevocable proxy to the Issuer"
An irrevocable proxy is a legal authorization in which a shareholder gives another person or entity the permanent right to vote their shares and cannot later take that voting permission back. It matters to investors because it locks who controls voting power on key issues—like board elections, mergers, or major policy changes—so it can change corporate control and influence the value or direction of an investment much like handing someone an unchangeable voting card.
appraisal rights regulatory
"the Reporting Persons have agreed not to take certain actions, including exercising any appraisal rights"
A legal right that lets shareholders who dislike the price or terms of a buyout, merger or other major corporate change ask for an independent determination of the fair value of their shares instead of accepting the deal price. Think of it like asking a neutral referee to set the payout if you believe the offered price is too low. For investors, appraisal rights can provide a way to recover a higher cash value but can be slow, costly and create uncertainty around deal outcomes.
wholly owned subsidiary financial
"the Issuer surviving as a wholly owned subsidiary of Parent"
A wholly owned subsidiary is a company whose entire ownership is held by another company (the parent), so the parent controls decisions, operations, and finances. Think of it as a fully controlled branch that runs as its own legal entity but whose results flow straight into the parent’s financial statements; investors watch these structures because they affect consolidated revenue, risk exposure, and how profits, liabilities, and cash flow are allocated across the corporate group.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

How many Synlogic (SYBX) shares do the reporting persons own?

They report beneficial ownership of 3,312,219 Synlogic common shares, equal to 28.3% of the outstanding class. Each reporting person—Funicular Funds, Cable Car Capital and Jacob Ma‑Weaver—has sole voting and dispositive power over these shares according to the Schedule 13D/A amendment.

What merger involving Synlogic (SYBX) is referenced in this filing?

On July 28, 2026, Synlogic entered an Agreement and Plan of Merger with Caldera Therapeutics, Parent and their merger subsidiaries. Synlogic will merge with and into Synlogic Merger Sub, with Synlogic surviving as a wholly owned subsidiary of Parent, as described in a Form 8-K filed July 29, 2026.

What is the Support Agreement described for Synlogic (SYBX) shareholders?

The reporting persons signed a Support Agreement with Synlogic and Caldera. They agreed to vote all of their shares for the merger and adoption of the merger agreement, and against any competing or opposing proposals, while the Support Agreement remains in effect, subject to its stated termination conditions.

Are the reporting persons free to sell their Synlogic (SYBX) shares?

Under the Support Agreement, the reporting persons agreed not to sell or transfer any shares, subject to certain exceptions. They also agreed not to grant proxies or powers of attorney over the shares, and not to exercise appraisal rights in connection with the merger transaction.

When does the Synlogic (SYBX) Support Agreement terminate?

The Support Agreement terminates in specified circumstances, including upon valid termination of the Merger Agreement in accordance with its terms or by written agreement of the parties. Once terminated, the voting commitments, transfer restrictions and irrevocable proxy described in the agreement would no longer apply.

What proxy rights did Synlogic (SYBX) receive from the reporting persons?

Subject to conditions, the reporting persons granted Synlogic an irrevocable proxy to vote their shares on the supported matters. This proxy allows Synlogic to vote those shares in favor of the merger and related proposals while the Support Agreement and merger agreement remain in effect.





87166L209

(CUSIP Number)
JACOB MA-WEAVER
CABLE CAR CAPITAL, LP, 601 California Street, Suite 1151
San Francisco, CA, 94108
415-857-1965


ANDREW FREEDMAN, ESQ.
OLSHAN FROME WOLOSKY LLP, 1325 Avenue of the Americas
New York, NY, 10019
212-451-2300

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
07/28/2026

(Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




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SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


Funicular Funds, LP
Signature:/s/ Jacob Ma-Weaver
Name/Title:Jacob Ma-Weaver, Managing Member
Date:07/29/2026
Cable Car Capital, LP
Signature:/s/ Jacob Ma-Weaver
Name/Title:Jacob Ma-Weaver, Managing Member
Date:07/29/2026
Ma-Weaver Jacob
Signature:/s/ Jacob Ma-Weaver
Name/Title:Jacob Ma-Weaver
Date:07/29/2026