HARVARD BIOSCIENCE INC - HBIO
Detailed investor-level table based on 13F positions.
Methodology:
Market value and % of portfolio use SEC reported VALUE ($000).
For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received.
Details.
Rows: 0
| Investor | History | Status | Shares held | Market value ($000) | % of portfolio | Previous % | Rank | Change in shares | % change in shares | Source | Date reported |
|---|---|---|---|---|---|---|---|---|---|---|---|
| WEBER CAPITAL MANAGEMENT LLC /ADV | History | New | 3,200,380 | 2,140 | 2.02% | — | 1 | +3,200,380 | New | Q4 2025 | Jan 29, 2026 |
| VANGUARD GROUP INC | History | Added to | 1,923,275 | 1,286 | 0.0% | 0.0% | 2 | +71,429 | 3.86% | Q4 2025 | Jan 29, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | History | Added to | 1,772,627 | 1,184 | 0.0% | 0.0% | 3 | +702,937 | 65.71% | Q4 2025 | Feb 10, 2026 |
| Meros Investment Management, LP | History | Added to | 1,217,628 | 814 | 0.32% | 0.17% | 4 | +299,369 | 32.6% | Q4 2025 | Feb 17, 2026 |
| CORSAIR CAPITAL MANAGEMENT, L.P. | History | Added to | 1,108,692 | 741 | 0.12% | 0.01% | 5 | +1,008,692 | 1008.69% | Q4 2025 | Feb 17, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | History | Added to | 1,021,241 | 683 | 0.0% | 0.0% | 6 | +152,763 | 17.59% | Q4 2025 | Feb 12, 2026 |
| TWO SIGMA INVESTMENTS, LP | History | Added to | 1,012,417 | 677 | 0.0% | 0.0% | 7 | +538,260 | 113.52% | Q4 2025 | Feb 17, 2026 |
| TWO SIGMA ADVISERS, LP | History | Added to | 878,556 | 587 | 0.0% | 0.0% | 8 | +635,400 | 261.31% | Q4 2025 | Feb 17, 2026 |
| BlackRock, Inc. | History | Added to | 622,296 | 416 | 0.0% | 0.0% | 9 | +929 | 0.15% | Q4 2025 | Feb 12, 2026 |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | History | New | 600,000 | 401 | 0.34% | — | 10 | +600,000 | New | Q4 2025 | Feb 06, 2026 |
| MILLENNIUM MANAGEMENT LLC | History | Reduced | 546,067 | 365 | 0.0% | 0.0% | 11 | -25,636 | -4.48% | Q4 2025 | Feb 17, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | History | Added to | 460,793 | 308 | 0.0% | 0.0% | 12 | +18,923 | 4.28% | Q4 2025 | Feb 09, 2026 |
| JANE STREET GROUP, LLC | History | Added to | 444,959 | 297 | 0.0% | 0.0% | 13 | +404,395 | 996.93% | Q4 2025 | Feb 12, 2026 |
| Portolan Capital Management, LLC | History | New | 409,650 | 273 | 0.01% | — | 14 | +409,650 | New | Q4 2025 | Feb 17, 2026 |
| Williams & Novak, LLC | History | Added to | 348,800 | 233 | 0.18% | 0.09% | 15 | +73,300 | 26.61% | Q4 2025 | Feb 05, 2026 |
| CITIGROUP INC | History | Added to | 193,828 | 129 | 0.0% | — | 16 | +192,319 | 12744.8% | Q4 2025 | Feb 13, 2026 |
| ESSEX INVESTMENT MANAGEMENT CO LLC | History | New | 184,678 | 123 | 0.02% | — | 17 | +184,678 | New | Q4 2025 | Feb 13, 2026 |
| RBF Capital, LLC | History | No change | 160,000 | 107 | 0.0% | 0.0% | 18 | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| STATE STREET CORP | History | No change | 149,352 | 99 | 0.0% | 0.0% | 19 | 0 | 0.0% | Q4 2025 | Feb 13, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | History | Added to | 139,869 | 93 | 0.0% | 0.0% | 20 | +55,520 | 65.82% | Q4 2025 | Feb 17, 2026 |
| Assenagon Asset Management S.A. | History | Reduced | 139,218 | 93 | 0.0% | 0.0% | 21 | -2 | -0.0% | Q4 2025 | Jan 09, 2026 |
| Bank of New York Mellon Corp | History | No change | 126,223 | 84 | 0.0% | 0.0% | 22 | 0 | 0.0% | Q4 2025 | Feb 10, 2026 |
| NORTHERN TRUST CORP | History | Reduced | 91,973 | 61 | 0.0% | 0.0% | 23 | -53,200 | -36.65% | Q4 2025 | Feb 17, 2026 |
| CITADEL ADVISORS LLC | History | Added to | 62,292 | 41 | 0.0% | 0.0% | 24 | +19,892 | 46.92% | Q4 2025 | Feb 17, 2026 |
| Virtu Financial LLC | History | New | 59,508 | 40 | 0.0% | — | 25 | +59,508 | New | Q4 2025 | Feb 23, 2026 |
| GAMCO INVESTORS, INC. ET AL | History | New | 57,000 | 38 | 0.0% | — | 26 | +57,000 | New | Q4 2025 | Feb 05, 2026 |
| GOLDMAN SACHS GROUP INC | History | Added to | 49,751 | 33 | 0.0% | 0.0% | 27 | +37,057 | 291.93% | Q4 2025 | Mar 25, 2026 |
| Pasadena Private Wealth, LLC | History | Reduced | 45,000 | 30 | 0.0% | 0.02% | 28 | -198,911 | -81.55% | Q4 2025 | Feb 10, 2026 |
| Legato Capital Management LLC | History | Added to | 43,467 | 29 | 0.0% | 0.0% | 29 | +29,462 | 210.37% | Q4 2025 | Feb 06, 2026 |
| XTX Topco Ltd | History | New | 39,349 | 26 | 0.0% | — | 31 | +39,349 | New | Q4 2025 | Feb 17, 2026 |
| GABELLI FUNDS LLC | History | New | 39,000 | 26 | 0.0% | — | 30 | +39,000 | New | Q4 2025 | Feb 05, 2026 |
| FMR LLC | History | Reduced | 32,899 | 22 | 0.0% | 0.0% | 32 | -12,694 | -27.84% | Q4 2025 | Feb 17, 2026 |
| Callan Family Office, LLC | History | Reduced | 29,791 | 19 | 0.0% | 0.0% | 33 | -53 | -0.18% | Q4 2025 | Feb 12, 2026 |
| DIMENSIONAL FUND ADVISORS LP | History | Reduced | 27,792 | 18 | 0.0% | 0.0% | 34 | -468,352 | -94.4% | Q4 2025 | Feb 12, 2026 |
| GREENWOOD CAPITAL ASSOCIATES LLC | History | No change | 27,754 | 18 | 0.0% | 0.0% | 35 | 0 | 0.0% | Q4 2025 | Jan 26, 2026 |
| GROUP ONE TRADING LLC | History | Added to | 25,513 | 17 | 0.0% | — | 36 | +23,700 | 1307.23% | Q4 2025 | Feb 12, 2026 |
| Abel Hall, LLC | History | Reduced | 25,283 | 16 | 0.0% | 0.01% | 37 | -6,923 | -21.5% | Q4 2025 | Feb 17, 2026 |
| UBS Group AG | History | Added to | 21,213 | 14 | 0.0% | 0.0% | 38 | +7,934 | 59.75% | Q4 2025 | Jan 29, 2026 |
| Qube Research & Technologies Ltd | History | Reduced | 17,029 | 11 | 0.0% | 0.0% | 41 | -20,226 | -54.29% | Q4 2025 | Feb 17, 2026 |
| TWO SIGMA SECURITIES, LLC | History | New | 17,549 | 11 | 0.0% | — | 40 | +17,549 | New | Q4 2025 | Feb 17, 2026 |
| Vanguard Personalized Indexing Management, LLC | History | New | 16,542 | 11 | 0.0% | — | 42 | +16,542 | New | Q4 2025 | Feb 13, 2026 |
| MORGAN STANLEY | History | Reduced | 16,686 | 11 | 0.0% | 0.0% | 39 | -17 | -0.1% | Q4 2025 | Feb 13, 2026 |
| Point72 Asset Management, L.P. | History | New | 14,717 | 9 | 0.0% | — | 44 | +14,717 | New | Q4 2025 | Feb 17, 2026 |
| SIMPLEX TRADING, LLC | History | Added to | 13,790 | 9 | 0.0% | 0.0% | 43 | +11,041 | 401.64% | Q4 2025 | Feb 11, 2026 |
| CERTUITY, LLC | History | No change | 13,677 | 9 | 0.0% | 0.0% | 45 | 0 | 0.0% | Q4 2025 | Jan 30, 2026 |
| GSK plc | History | New | 11,151 | 7 | 0.0% | — | 46 | +11,151 | New | Q4 2025 | Feb 12, 2026 |
| Ethic Inc. | History | Reduced | 10,942 | 7 | 0.0% | 0.0% | 47 | -1,497 | -12.03% | Q4 2025 | Feb 03, 2026 |
| Balboa Wealth Partners | History | Reduced | 10,000 | 6 | 0.0% | 0.0% | 48 | -1,750 | -14.89% | Q4 2025 | Jan 16, 2026 |
| SBI Securities Co., Ltd. | History | No change | 8,670 | 5 | 0.0% | 0.0% | 49 | 0 | 0.0% | Q4 2025 | Feb 03, 2026 |
| ROYAL BANK OF CANADA | History | New | 4,795 | 3 | 0.0% | — | 50 | +4,795 | New | Q4 2025 | Feb 17, 2026 |
| Brown Shipley& Co Ltd | History | No change | 4,783 | 3 | 0.0% | 0.0% | 51 | 0 | 0.0% | Q4 2025 | Jan 21, 2026 |
| Tower Research Capital LLC (TRC) | History | Reduced | 2,395 | 1 | 0.0% | 0.0% | 55 | -6,067 | -71.7% | Q4 2025 | Feb 17, 2026 |
| JPMORGAN CHASE & CO | History | Added to | 1,960 | 1 | 0.0% | — | 52 | +323 | 19.73% | Q4 2025 | Feb 11, 2026 |
| NISA INVESTMENT ADVISORS, LLC | History | No change | 2,289 | 1 | 0.0% | 0.0% | 53 | 0 | 0.0% | Q4 2025 | Jan 15, 2026 |
| FEDERATED HERMES, INC. | History | No change | 1,656 | 1 | 0.0% | — | 54 | 0 | 0.0% | Q4 2025 | Feb 12, 2026 |
| Harvey Partners, LLC | History | Closed out | 0 | 0 | — | 0.08% | — | -2,050,000 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Granahan Investment Management, LLC | History | Closed out | 0 | 0 | — | 0.01% | — | -603,519 | -100.0% | Q3 2025 | Nov 14, 2025 |
| Acuitas Investments, LLC | History | Closed out | 0 | 0 | — | 0.14% | — | -491,092 | -100.0% | Q3 2025 | Nov 18, 2025 |
| BRIGHTON JONES LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -25,007 | -100.0% | Q3 2025 | Oct 14, 2025 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | History | Closed out | 0 | 0 | — | 0.0% | — | -12,500 | -100.0% | Q3 2025 | Nov 14, 2025 |
| PNC FINANCIAL SERVICES GROUP, INC. | History | Reduced | 144 | 0 | — | 0.0% | — | -7,400 | -98.09% | Q4 2025 | Feb 06, 2026 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | History | Closed out | 0 | 0 | — | — | — | -1,900 | -100.0% | Q3 2025 | Nov 14, 2025 |
| EverSource Wealth Advisors, LLC | History | Closed out | 0 | 0 | — | — | — | -1,219 | -100.0% | Q3 2025 | Nov 10, 2025 |
| Rialto Wealth Management, LLC | History | Closed out | 0 | 0 | — | — | — | -1,081 | -100.0% | Q3 2025 | Nov 07, 2025 |
| SHP Wealth Management | History | New | 100 | 0 | — | — | — | +100 | New | Q4 2025 | Mar 04, 2026 |
| BARCLAYS PLC | History | Added to | 21 | 0 | — | — | — | +20 | 2000.0% | Q4 2025 | Feb 13, 2026 |
| CWM, LLC | History | Reduced | 54 | 0 | — | — | — | -19 | -26.03% | Q4 2025 | Jan 26, 2026 |
| BANK OF AMERICA CORP /DE/ | History | Added to | 451 | 0 | — | — | — | +9 | 2.04% | Q4 2025 | Feb 17, 2026 |
| BNP PARIBAS FINANCIAL MARKETS | History | No change | 680 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 10, 2026 |
| Optiver Holding B.V. | History | No change | 14 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Feb 17, 2026 |
| Financial Connections Group, Inc. | History | No change | 300 | 0 | — | — | — | 0 | 0.0% | Q4 2025 | Jan 23, 2026 |