HBIO Harvard Bioscience Inc.
Harvard Bioscience Inc. (HBIO) Institutional Ownership
What the institutions did with HBIO last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeOwnership map
Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| WEBER CAPITAL MANAGEMENT LLC /ADV | 310.9K | 18.5% |
| Meros Investment Management, LP | 183.0K | 10.9% |
| ACADIAN ASSET MANAGEMENT LLC | 179.6K | 10.7% |
| VANGUARD CAPITAL MANAGEMENT LLC | 169.6K | 10.1% |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | 143.1K | 8.5% |
| CORSAIR CAPITAL MANAGEMENT, L.P. | 122.8K | 7.3% |
| TWO SIGMA INVESTMENTS, LP | 114.5K | 6.8% |
| RENAISSANCE TECHNOLOGIES LLC | 99.3K | 5.9% |
| BlackRock, Inc. | 61.8K | 3.7% |
| GEODE CAPITAL MANAGEMENT, LLC | 47.6K | 2.8% |
| Mink Brook Asset Management LLC | 33.4K | 2.0% |
| MILLENNIUM MANAGEMENT LLC | 32.6K | 1.9% |
| VANGUARD FIDUCIARY TRUST CO | 27.7K | 1.7% |
| ESSEX INVESTMENT MANAGEMENT CO LLC | 27.0K | 1.6% |
| Williams & Novak, LLC | 20.9K | 1.2% |
| UBS Group AG | 17.6K | 1.0% |
| RBF Capital, LLC | 16.0K | 1.0% |
| STATE STREET CORP | 14.9K | 0.9% |
| JANE STREET GROUP, LLC | 14.0K | 0.8% |
| CITADEL ADVISORS LLC | 13.3K | 0.8% |
| GOLDMAN SACHS GROUP INC | 10.7K | 0.6% |
| Bank of New York Mellon Corp | 10.2K | 0.6% |
| FMR LLC | 3.2K | 0.2% |
| MORGAN STANLEY | 1.6K | 0.1% |
| Vanguard Global Advisers, LLC | 1.2K | 0.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Meros Investment Management, LP | Increased | 118.5K | 183.0K | +64.5K |
| Mink Brook Asset Management LLC | New | 0 | 33.4K | +33.4K |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | Increased | 117.5K | 143.1K | +25.6K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 46.3K | 32.6K | -13.7K |
| CITADEL ADVISORS LLC | New | 0 | 13.3K | +13.3K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 59.5K | 47.6K | -12.0K |
| GOLDMAN SACHS GROUP INC | New | 0 | 10.7K | +10.7K |
| JANE STREET GROUP, LLC | Reduced | 23.8K | 14.0K | -9.8K |
| UBS Group AG | Increased | 8.4K | 17.6K | +9.2K |
| WEBER CAPITAL MANAGEMENT LLC /ADV | Reduced | 320.0K | 310.9K | -9.2K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 163.3K | 169.6K | +6.3K |
| CITIGROUP INC | Sold Out | 6.3K | 0 | -6.3K |
| Williams & Novak, LLC | Reduced | 27.1K | 20.9K | -6.1K |
| JPMORGAN CHASE & CO | Reduced | 4.5K | 195 | -4.3K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 101.4K | 99.3K | -2.1K |
| CORSAIR CAPITAL MANAGEMENT, L.P. | Reduced | 124.8K | 122.8K | -2.0K |
| GROUP ONE TRADING LLC | Reduced | 2.2K | 240 | -1.9K |
| ROYAL BANK OF CANADA | Reduced | 855 | 15 | -840 |
| Tower Research Capital LLC (TRC) | Reduced | 1.2K | 580 | -572 |
| TWO SIGMA INVESTMENTS, LP | Increased | 114.1K | 114.5K | +428 |
| BlackRock, Inc. | Reduced | 62.2K | 61.8K | -392 |
| FMR LLC | Reduced | 3.3K | 3.2K | -95 |
| FEDERATED HERMES, INC. | Sold Out | 73 | 0 | -73 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | Reduced | 27.0K | 27.0K | -48 |
| BARCLAYS PLC | New | 0 | 26 | +26 |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 68 | 66 | -2 |
| MORGAN STANLEY | Reduced | 1.6K | 1.6K | -1 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.