SYBX
SYNLOGIC, INC.Marquee-fund ownership over time
This quarter's activity
New positions opened
None.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Citadel Advisors 3× in & out | Q4 2025 | Q2 2026 | → $0.66 | -61% |
| Renaissance Technologies | Q3 2024 | Q2 2026 | → $0.65 | -56% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at SYNLOGIC, INC.. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from Oct 31, 2025 — the most recent Form 4 on file — not from today.
- Form 40001193125-25-260649Oct 31, 2025
- Form 40000950170-25-060267Apr 29, 2025
- Form 40000950170-25-060253Apr 29, 2025
- Form 40000950170-25-050478Apr 3, 2025
- Form 40000950170-25-013831Feb 4, 2025
- Form 40000950170-24-119194Oct 30, 2024
- Form 40000950170-24-041790Apr 4, 2024
- Form 40000950170-24-041787Apr 4, 2024
- Form 40000950170-24-034866Mar 21, 2024
- Form 40000950170-24-001826Jan 4, 2024
- Form 40000950170-24-001821Jan 4, 2024
- Form 40000950170-23-063927Nov 14, 2023
- Form 40000950170-23-063926Nov 14, 2023
- Form 40000950170-23-063925Nov 14, 2023
- Form 40001209191-23-039666Jun 26, 2023
Fundamentals
XBRL · SYNLOGIC, INC.Annual figures sourced directly from SYNLOGIC, INC.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for SYNLOGIC, INC. — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 10-QQuarterly reportMay 14, 2026
- 10-K/AAnnual report (amended)Apr 30, 2026
- 10-KAnnual reportMar 12, 2026
- 8-K/AMaterial event (amended)Jan 29, 2026
- 8-KMaterial eventJan 20, 2026
- 8-KMaterial eventDec 16, 2025
- 8-KMaterial eventNov 26, 2025
- 10-QQuarterly reportNov 13, 2025
- DEF 14AProxy statementNov 12, 2025
- S-3/ARegistration (shelf, amended)Aug 15, 2025
- S-3Registration (shelf)Aug 8, 2025
- 10-QQuarterly reportAug 7, 2025
- 10-QQuarterly reportMay 8, 2025
- 10-K/AAnnual report (amended)Apr 30, 2025
- 10-KAnnual reportMar 6, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Citadel Advisors | Q4 2025 | Q2 2026 | $1.68 | $0.66 | -61% |
| Citadel Advisors | Q2 2025 | Q3 2025 | $1.13 | $1.45 | +28% |
| Citadel Advisors | Q3 2024 | Q1 2025 | $1.41 | $1.40 | -1% |
| Renaissance Technologies | Q3 2024 | Q2 2026 | $1.46 | $0.65 | -56% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.