HARVARD BIOSCIENCE INC - HBIO

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q4 2025 · Compare: Q3 2025
13D/13G major owners: Ownership tab.
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