iSpecimen Inc. (ISPC) ownership: institutions 29% (13F 2026-03-31). Insider activity, 90 days: 0 sales, 0 open-market buys. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| Renaissance Technologies | 153457.00 | $197960.00 | 6.1% | 2026-03-31 |
| Geode Capital Management | 313098.00 | $49155.00 | 12.4% | 2026-03-31 |
| Jane Street | 55631.00 | $8734.00 | 2.2% | 2026-03-31 |
| UBS | 53744.00 | $8438.00 | 2.1% | 2026-03-31 |
| Citadel | 50471.00 | $7924.00 | 2.0% | 2026-03-31 |
| Vanguard | 29407.00 | $4617.00 | 1.2% | 2026-03-31 |
| Northern Trust | 13805.00 | $4266.00 | 0.5% | 2026-03-31 |
| Susquehanna | 15063.00 | $3918.00 | 0.6% | 2026-03-31 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.