iSpecimen
ISPC
10 hedge funds and large institutions have $443K invested in iSpecimen in 2025 Q3 according to their latest regulatory filings, with 6 funds opening new positions, 1 increasing their positions, 1 reducing their positions, and 3 closing their positions.
570% more capital invested
Capital invested by funds: $66.1K → $443K (+$377K)
100% more first-time investments, than exits
New positions opened: 6 | Existing positions closed: 3
43% more funds holding
Funds holding: 7 → 10 (+3)
0.09% more ownership
Funds ownership: 0.07% → 0.15% (+0.09%)
0% more repeat investments, than reductions
Existing positions increased: 1 | Existing positions reduced: 1
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Renaissance Technologies
New York
|
+$180K |
| 2 |
VF
Virtu Financial
New York
|
+$74.2K |
| 3 |
SRL
Scientech Research LLC
Jersey City,
New Jersey
|
+$34.6K |
| 4 |
Vanguard Group
Malvern,
Pennsylvania
|
+$34.5K |
| 5 |
Geode Capital Management
Boston,
Massachusetts
|
+$31.6K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$19.1K |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$13.8K |
| 3 |
XT
XTX Topco
George Town,
Cayman Islands
|
-$9.88K |
| 4 |
TRCT
Tower Research Capital (TRC)
New York
|
-$4.51K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
1
Renaissance Technologies
New York
| $198K | +$180K | +3,836 | New |
|
|
VF
2
Virtu Financial
New York
| $82K | +$74.2K | +1,581 | New |
|
|
3
Geode Capital Management
Boston,
Massachusetts
| $53.8K | +$31.6K | +672 | +182% |
|
|
SRL
4
Scientech Research LLC
Jersey City,
New Jersey
| $38K | +$34.6K | +737 | New |
|
|
5
Vanguard Group
Malvern,
Pennsylvania
| $37.9K | +$34.5K | +735 | New |
|
6
Jane Street
New York
| $26.1K | +$23.8K | +506 | New |
|
7
BlackRock
New York
| $3.65K | – | – | – |
|
|
TRCT
8
Tower Research Capital (TRC)
New York
| $3.04K | -$4.51K | -96 | -62% |
|
9
Fidelity Investments
Boston,
Massachusetts
| $387 | +$376 | +8 | New |
|
10
Bank of America
Charlotte,
North Carolina
| $58 | – | – | – |
|
|
SS
11
SBI Securities
Tokyo,
Japan
| $5 | – | – | – |
|
|
S
12
Sachetta
Lynnfield,
Massachusetts
| $3 | – | – | – |
|
|
13
Citadel Advisors
Miami,
Florida
| – | -$19.1K | -487 | Closed |
|
|
14
UBS Group
Zurich,
Switzerland
| – | -$13.8K | -351 | Closed |
|
|
XT
15
XTX Topco
George Town,
Cayman Islands
| – | -$9.88K | -252 | Closed |
|
ISPC Hedge Fund Activity: Q3 2025 in Review
10 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in iSpecimen (ISPC) for Q3 2025, worth a combined $443K — up 570% from $66.1K a quarter earlier.
Buyers outnumbered sellers: 6 funds opened new ISPC positions and 3 closed out — a net gain of 3 holders — while 1 added to existing stakes and 1 trimmed.
The largest buyer was Renaissance Technologies, opening a new position worth an estimated $180K. The largest seller was Citadel Advisors, exiting entirely with an estimated $19.1K sold.
- 10 institutional investors held iSpecimen (ISPC) as of Q3 2025, up from 7 in Q2 2025.
- Funds reported $443K of iSpecimen stock for Q3 2025, up 570% quarter-over-quarter.
- 6 funds opened new iSpecimen positions in Q3 2025 and 3 closed out, a net change of +3 holders.
- The largest iSpecimen buyer in Q3 2025 was Renaissance Technologies, an estimated $180K added.
- The largest iSpecimen seller in Q3 2025 was Citadel Advisors, an estimated $19.1K sold.
Based on aggregated 13F filings for Q3 2025.