Who owns HARVARD BIOSCIENCE INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of HBIO from SEC Form 13F filings across 35 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 35 institutions disclosed 1.4M shares of HARVARD BIOSCIENCE INC worth $7.2M — about 29.9% of shares outstanding; the largest disclosed holder is WEBER CAPITAL MANAGEMENT LLC /ADV. Source: SEC Form 13F filings, parsed by EvidInvest.
35
13F holders
$7.2M
value, 2026 filers
29.9%
of shares outstanding (1.4M sh)
6
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of HBIO's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | WEBER CAPITAL MANAGEMENT LLC /ADV | 310,861 | $1.9M | 1.6% | 6.9% | -2.9% |
| 2 | ACADIAN ASSET MANAGEMENT LLC | 179,614 | $1,103 | 0.0% | 4% | 0.0% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 169,625 | $1.0M | 0.0% | 3.7% | +3.9% |
| 4 | CORSAIR CAPITAL MANAGEMENT, L.P. | 122,810 | $755,282 | 0.1% | 2.7% | -1.6% |
| 5 | TWO SIGMA INVESTMENTS, LP | 114,545 | $704,452 | 0.0% | 2.5% | +0.4% |
| 6 | RENAISSANCE TECHNOLOGIES LLC | 99,327 | $610,861 | 0.0% | 2.2% | -2.1% |
| 7 | BlackRock, Inc. | 61,834 | $380,280 | 0.0% | 1.4% | -0.6% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 47,555 | $292,534 | 0.0% | 1.1% | -20.1% |
| 9 | Mink Brook Asset Management LLCNEW | 33,369 | $205,219 | 0.1% | 0.7% | new |
| 10 | MILLENNIUM MANAGEMENT LLC | 32,620 | $200,613 | 0.0% | 0.7% | -29.6% |
| 11 | VANGUARD FIDUCIARY TRUST CO | 27,730 | $170,540 | 0.0% | 0.6% | 0.0% |
| 12 | ESSEX INVESTMENT MANAGEMENT CO LLC | 26,973 | $165,884 | 0.0% | 0.6% | -0.2% |
| 13 | Williams & Novak, LLC | 20,949 | $128,836 | 0.1% | 0.5% | -22.6% |
| 14 | UBS Group AG | 17,581 | $108,123 | 0.0% | 0.4% | +109.2% |
| 15 | RBF Capital, LLC | 16,000 | $98,400 | 0.0% | 0.4% | 0.0% |
| 16 | STATE STREET CORP | 14,932 | $91,832 | 0.0% | 0.3% | 0.0% |
| 17 | JANE STREET GROUP, LLC | 13,982 | $85,989 | 0.0% | 0.3% | -41.3% |
| 18 | CITADEL ADVISORS LLCNEW | 13,251 | $81,494 | 0.0% | 0.3% | new |
| 19 | GOLDMAN SACHS GROUP INCNEW | 10,657 | $65,541 | 0.0% | 0.2% | new |
| 20 | Bank of New York Mellon Corp | 10,230 | $62,915 | 0.0% | 0.2% | 0.0% |
| 21 | FMR LLC | 3,179 | $19,551 | 0.0% | 0.1% | -2.9% |
| 22 | MORGAN STANLEY | 1,627 | $10,006 | 0.0% | 0% | -0.1% |
| 23 | Vanguard Global Advisers, LLC | 1,221 | $7,509 | 0.0% | 0% | 0.0% |
| 24 | SBI Securities Co., Ltd. | 866 | $5,326 | 0.0% | 0% | 0.0% |
| 25 | Tower Research Capital LLC (TRC) | 580 | $3,567 | 0.0% | 0% | -49.7% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.