Synlogic
SYBX
SYBX was delisted on the 20th of January, 2026.
23 hedge funds and large institutions have $11.1M invested in Synlogic in 2025 Q3 according to their latest regulatory filings, with 7 funds opening new positions, 3 increasing their positions, 4 reducing their positions, and 3 closing their positions.
133% more first-time investments, than exits
New positions opened: 7 | Existing positions closed: 3
29% more capital invested
Capital invested by funds: $8.6M → $11.1M (+$2.51M)
21% more funds holding
Funds holding: 19 → 23 (+4)
1.01% less ownership
Funds ownership: 57.9% → 56.89% (-1%)
25% less repeat investments, than reductions
Existing positions increased: 3 | Existing positions reduced: 4
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
+$43.3K |
| 2 |
Northern Trust
Chicago,
Illinois
|
+$29.1K |
| 3 |
Renaissance Technologies
New York
|
+$23.4K |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$20.1K |
| 5 |
XT
XTX Topco
George Town,
Cayman Islands
|
+$16.7K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$240K |
| 2 |
FT
Fiduciary Trust
Boston,
Massachusetts
|
-$28.4K |
| 3 |
RC
Rangeley Capital
New Canaan,
Connecticut
|
-$17.3K |
| 4 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$12.9K |
| 5 |
Morgan Stanley
New York
|
-$45 |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
26
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
| – | -$12.9K | -10,180 | Closed |
|
SYBX Hedge Fund Activity: Q3 2025 in Review
23 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Synlogic (SYBX) for Q3 2025, worth a combined $11.1M — up 29% from $8.6M a quarter earlier.
Buyers outnumbered sellers: 7 funds opened new SYBX positions and 3 closed out — a net gain of 4 holders — while 3 added to existing stakes and 4 trimmed.
The largest buyer was Citadel Advisors, opening a new position worth an estimated $43.3K. The largest seller was Fidelity Investments, cutting an estimated $240K.
- 23 institutional investors held Synlogic (SYBX) as of Q3 2025, up from 19 in Q2 2025.
- Funds reported $11.1M of Synlogic stock for Q3 2025, up 29% quarter-over-quarter.
- 7 funds opened new Synlogic positions in Q3 2025 and 3 closed out, a net change of +4 holders.
- The largest Synlogic buyer in Q3 2025 was Citadel Advisors, an estimated $43.3K added.
- The largest Synlogic seller in Q3 2025 was Fidelity Investments, an estimated $240K sold.
Based on aggregated 13F filings for Q3 2025.