Synlogic, Inc. has 5 Schedule 13D or 13G filings on record since 2025-11-13. 3 holders' latest filing reports 5% or more of common stock, par value $0.001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Funicular Funds, LP | 28.3% | 3,312,219 | SCHEDULE 13D/A, 2026-07-29 | 2026-07-28 |
| New Enterprise Associates 14, L.P. | 25% | 2,922,772 | SCHEDULE 13D/A, 2026-07-29 | 2026-07-28 |
| Baselake Partners, LP | 9.7% | 1,140,000 | SCHEDULE 13G, 2026-01-23 | 2026-01-20 |
| Radoff Bradley Louis | 4.4% | 520,000 | SCHEDULE 13G/A, 2025-11-13 | 2025-09-30 |
Purpose of Transaction (Item 4)
Funicular Funds, LP
Item 4 is hereby amended to add the following: On July 28, 2026, the Issuer entered into an Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, Caldera Therapeutics, Inc., a Delaware corporation ("Caldera"), Sonic Holdco, Inc., a Delaware corporation ("Parent"), Yellowstone Merger Sub, Inc., a Delaware corporation and a direct, wholly owned subsidiary of Parent ("Caldera Merger Sub"), and Sonic Merger Sub, Inc., a Delaware corporation and a direct, wholly owned subsidiary of Parent ("Synlogic Merger Sub"). Pursuant to and subject to the terms of the Merger Agreement, among other things, the Issuer will be merged with and into Synlogic Merger Sub, with the Issuer surviving as a wholly owned subsidiary of Parent (the "Merger"), as more fully described in the Form 8-K filed by the Issuer with the Securities and Exchange Commission on July 29, 2026. Concurrently with the execution of the Merger Agreement, the Reporting Persons entered into a Support Agreement (the "Support Agreement") with Caldera and the Issuer. Under the terms of the Support Agreement, the Reporting Persons have agreed to vote all of their Shares in favor of the Merger and the adoption of the Merger Agreement and against any proposal made in opposition to, or in competition with, the Merger Agreement or the Merger. In addition, the Reporting Persons have agreed not to take certain actions, including (i) selling or transferring any Shares (subject to certain exceptions), (ii) …The first part of Item 4 of the SCHEDULE 13D/A filed 2026-07-29; the filing has the rest
New Enterprise Associates 14, L.P.
As previously disclosed by the Issuer, on July 28, 2026, the Issuer entered into an Agreement and Plan of Merger (the "Merger Agreement") by and among the Issuer, Caldera Therapeutics, Inc. ("Caldera"), Sonic Holdco, Inc. ("Parent"), Yellowstone Merger Sub, Inc., a direct, wholly owned subsidiary of Parent ("Caldera Merger Sub"), and Sonic Merger Sub, Inc., a direct, wholly owned subsidiary of Parent ("Synlogic Merger Sub"). Pursuant to the Merger Agreement, and upon the terms and subject to the satisfaction of the conditions described therein, the Issuer will be merged with and into Synlogic Merger Sub, with the Issuer surviving as a wholly owned subsidiary of Parent (the "Synlogic Merger"), and Caldera will be merged with and into Caldera Merger Sub, with Caldera surviving as a wholly owned subsidiary of Parent (the "Caldera Merger" and, together with the Synlogic Merger, the "Mergers"). Subject to the terms and conditions of the Merger Agreement, (a) at the effective time of the Caldera Merger (the "Caldera Effective Time") and following the conversion into shares of common stock of Caldera, $0.0001 par value per share ("Caldera Common Stock") of Caldera's (i) Series A Preferred Stock, $0.00001 par value per share, and (ii) Series A-1 Preferred Stock, $0.00001 par value per share, each then-outstanding share of Caldera Common Stock (excluding any shares of Caldera Common Stock held by stockholders who have exercised and perfected appraisal rights for such shares) will …The first part of Item 4 of the SCHEDULE 13D/A filed 2026-07-29; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-11-13 | Radoff Bradley Louis | 4.4% | SCHEDULE 13G/A |
| 2026-01-23 | Baselake Partners, LP | 9.7% | SCHEDULE 13G |
| 2026-04-06 | Funicular Funds, LP | 28.3% | SCHEDULE 13D/A |
| 2026-07-29 | Funicular Funds, LP | 28.3% | SCHEDULE 13D/A |
| 2026-07-29 | New Enterprise Associates 14, L.P. | 25% | SCHEDULE 13D/A |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.