iSpecimen Inc. (ISPC) Ownership
ISPC ownership summary
as of October 18, 2026- Institutions
- 2.3% of shares outstanding
- Insiders
- 0.00% of shares outstanding
- Shares outstanding
- 2.5M
- Float
- 2.5M shares available to trade
- Short interest
- 6.39% 161K shares short
- Days to cover
- 0.12 short interest down 27.1% vs prior month
- Institutions 2.25%
- Other investors 97.75%
ISPC top institutional holders
14 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | UBS Group AG | 1.27% | 32K | $29,378 | +30,693 (+2,283.7%) | June 30, 2026 |
| 2 | Jane Street Group LLC | 0.97% | 24K | $22,388 | +23,023 (+1,655.1%) | June 30, 2026 |
| 3 | IFP Advisors, LLC | 0.33% | 8,200 | $7,519 | +8,200 (0.0%) | June 30, 2026 |
| 4 | Tower Research Capital LLC | 0.01% | 219 | $201 | +53 (+31.9%) | June 30, 2026 |
| 5 | BlackRock Inc | <0.01% | 71 | $65 | — | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | <0.01% | 31 | $28 | +31 (0.0%) | June 30, 2026 |
| 7 | Caitong International Asset Management Co., Limited. | <0.01% | 2 | $2 | +2 (0.0%) | June 30, 2026 |
| 8 | SBI Securities Co Ltd | 0.00% | 1 | $1 | +1 (0.0%) | June 30, 2026 |
| 9 | Susquehanna International Group, LLP | 0.00% | — | — | −15,063 (−100.0%) | March 31, 2026 |
| 10 | Citadel Advisors Llc | 0.00% | — | — | −1,262 (−100.0%) | June 30, 2026 |
| 11 | Jump Financial LLC | 0.00% | — | — | −10,473 (−100.0%) | March 31, 2026 |
| 12 | Geode Capital Management, LLC | 0.00% | — | — | −7,827 (−100.0%) | June 30, 2026 |
| 13 | Sachetta LLC | 0.00% | — | — | — | June 30, 2026 |
| 14 | Bank of America Corp | 0.00% | — | — | −83 (−100.0%) | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 14, 7 holders added 62K shares and 5 cut 35K.
ISPC top mutual fund and ETF holders
1 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Extended Market Index | 0.49% | 12K | $11,341 | +5,032 (+68.6%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ISPC insider transactions
latest 2| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2023-09-14 | Benjamin Bielak | Buy | $0.72 | 18,000 | $12,960 |
| 2023-05-31 | Tracy Curley | Buy | $1.25 | 4,400 | $5,500 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ISPC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ISPC
Institutional investors own 2.3% of iSpecimen's shares and insiders 0.00%. The largest holder is UBS Group AG with 1.27% of the shares (32K), as of June 30, 2026. Among the top 14 institutions, 7 added shares and 5 reduced their stake in the latest filings. Short interest is 6.39% of the float, or 0.12 days of average trading volume. The share count rose 2,485.4% since 2019.
Related: ISPC key metrics. See the ISPC stock overview for the latest quote and news.
ISPC ownership FAQ
Who owns the most iSpecimen stock?
The largest shareholders of iSpecimen are UBS Group AG (1.27%), Jane Street Group LLC (0.97%), IFP Advisors, LLC (0.33%), Tower Research Capital LLC (0.01%), BlackRock Inc (<0.01%).
What percentage of iSpecimen is owned by institutions?
Institutions hold 2.3% of iSpecimen's shares outstanding; insiders hold 0.00%.
Which funds own iSpecimen?
The largest fund holders of iSpecimen are Fidelity Extended Market Index (0.49%).
What is iSpecimen's short interest?
161K shares of iSpecimen were sold short, 6.39% of the float; at the average daily volume it would take 0.12 days to cover.
Are insiders buying or selling iSpecimen?
Of the latest 2 reported insider transactions in iSpecimen (since May 31, 2023), 2 were purchases and 0 were sales.
How many shares of iSpecimen are outstanding?
iSpecimen has 2.5M shares outstanding, of which 2.5M are in the public float.