New Positions
3 managers initiated
Top five by reported value
iSpecimen Inc NASDAQ NMS - GLOBAL MARKET:ISPC
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
3 new2 added6 reduced4 exited
Total Institutional Holders
11
as of 2025-12-31
Top Holder
GEODE CAPITAL MANAGEMENT, LLC
$10.8K
Largest QoQ Increase
SUSQUEHANNA INTERNATIONAL GROUP, LLP
+15,063 sh
Largest QoQ Decrease
RENAISSANCE TECHNOLOGIES LLC
-153,457 sh
New Positions(3)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 15,063 | +15,063 | $3.9K | +$3.9K | — |
| Jump Financial, LLC | 10,473 | +10,473 | $2.7K | +$2.7K | — |
| UBS Group AG | 6,445 | +6,445 | $1.7K | +$1.7K | — |
Added To(2)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Tower Research Capital LLC (TRC) | 6,664 | +4,307 | $1.7K | -$1.3K | 182.7% |
| BANK OF AMERICA CORP /DE/ | 83 | +38 | $22 | -$36 | 84.4% |
Reduced(6)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | 41,594 | -96 | $10.8K | -$43.0K | -0.2% |
| VANGUARD GROUP INC | 29,407 | 0 | $7.6K | -$30.3K | 0.0% |
| JANE STREET GROUP, LLC | 14,093 | -6,164 | $3.7K | -$22.5K | -30.4% |
| BlackRock, Inc. | 2,827 | 0 | $735 | -$2.9K | 0.0% |
| SBI Securities Co., Ltd. | 4 | 0 | $1 | -$4 | 0.0% |
| Sachetta, LLC | 2 | 0 | $1 | -$2 | 0.0% |
Sold Out(4)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | 0 | -153,457 | $0 | -$198.0K | — |
| Scientech Research LLC | 0 | -29,488 | $0 | -$38.0K | — |
| FMR LLC | 0 | -300 | $0 | -$387 | — |
| Virtu Financial LLC | 0 | -63,257 | $0 | -$82 | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| GEODE CAPITAL MANAGEMENT, LLC | 41,594 | $10.8K | -96 | -0.2% |
| VANGUARD GROUP INC | 29,407 | $7.6K | 0 | 0.0% |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 15,063 | $3.9K | +15,063 | — |
| JANE STREET GROUP, LLC | 14,093 | $3.7K | -6,164 | -30.4% |
| Jump Financial, LLC | 10,473 | $2.7K | +10,473 | — |
| Tower Research Capital LLC (TRC) | 6,664 | $1.7K | +4,307 | 182.7% |
| UBS Group AG | 6,445 | $1.7K | +6,445 | — |
| BlackRock, Inc. | 2,827 | $735 | 0 | 0.0% |
| BANK OF AMERICA CORP /DE/ | 83 | $22 | +38 | 84.4% |
| Sachetta, LLC | 2 | $1 | 0 | 0.0% |
| SBI Securities Co., Ltd. | 4 | $1 | 0 | 0.0% |
New & Closed Positions this quarter
Closed Positions
4 managers exited
Top five by prior-quarter value
- RENAISSANCE TECHNOLOGIES LLC$198.0K
- Scientech Research LLC$38.0K
- FMR LLC$387
- Virtu Financial LLC$82
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for ISPC against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.