Synlogic, Inc.
SYBX- Exchange
- OTC
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001527599
No open-market purchases or sales by Synlogic, Inc. insiders were filed in the last 90 days; 1 institution reported holding it in 13F filings for Q2 2026, worth $16.7K in total; no superinvestor holds it.
Holders of 5% or more of SYBX
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Synlogic, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Funicular Funds, LP | 13D/A | 28.30%3.31M shares | – | Apr 6, 20261 filing | Apr 6, 2026 | SEC |
| Baselake Partners, LP | 13G | 9.70%1.14M shares | New | Jan 23, 20261 filing | Jan 23, 2026 | SEC |
| Kryzanowski John A | 13G/A | 6.27%733.4K shares | – | Feb 25, 20251 filing | Feb 25, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
4 Schedule 13D and 13G filings on Synlogic, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Apr 6, 20264:15 PM ET | Funicular Funds, LPand 2 others | 13D/A | 28.30%3.31M shares | – | Apr 2, 2026 | SEC |
| Jan 23, 202612:09 PM ET | Baselake Partners, LPand 2 others | 13G | 9.70%1.14M shares | New | Jan 20, 2026 | SEC |
| Nov 13, 20254:19 PM ET | Radoff Bradley Louis | 13G/A | 4.40%520.0K shares | –Below 5% | Sep 30, 2025 | SEC |
| Feb 25, 20254:23 PM ET | Kryzanowski John A | 13G/A | 6.27%733.4K shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Synlogic, Inc. shares.
No Form 144 notices for Synlogic, Inc. are on file.