Harvard Bioscience Inc (HBIO) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

46,600,000Shares Outstanding

907,679Shares held by institutions

$544,607Value of institutional holdings

58.92%Institutional ownership %

-0.74%Shares Changed QoQ

100No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

The institutional landscape for Harvard Bioscience Inc (NASDAQ:HBIO) includes 62 filers as of the latest reporting cycle ending December 2025.

Institutional ownership in Harvard Bioscience edged up to 39.5% in December 2025, compared to 37.4% in September 2025.
Quarterly data indicates a 87.54% shift in institutional share volume, and the annual owner count reflects a decrease of 36.08%.
The latest 13F cycle for Harvard Bioscience reveals that of 62 total investors, 33 funds grew their exposure, whereas 17 reduced theirs and 12 made no changes.
This class of investors increased its holdings in Harvard Bioscience to 17.59Mn shares for the 13F-cycle ending December 2025, up by 8.21Mn shares quarter on quarter, and down 13.45Mn shares year over year.
As of December 31, 2025, WEBER CAPITAL MANAGEMENT LLC /ADV held Harvard Bioscience's largest shareholding position with over 3.20Mn shares, representing 7.19% of total outstanding shares.
Among the most significant buyers of Harvard Bioscience during December 2025 were WEBER CAPITAL MANAGEMENT LLC /ADV (3.20Mn), CORSAIR CAPITAL MANAGEMENT, L.P. (1.01Mn), ACADIAN ASSET MANAGEMENT LLC (702.94K), TWO SIGMA ADVISERS, LP (635.40K), NANO CAP NEW MILLENNIUM GROWTH FUND L P (600.00K).
Leading sellers of Harvard Bioscience stock in December 2025 included DIMENSIONAL FUND ADVISORS LP (468.35K), Pasadena Private Wealth, LLC (198.91K), NORTHERN TRUST CORP (53.20K), MILLENNIUM MANAGEMENT LLC (25.64K), Qube Research & Technologies Ltd (20.23K).
The top 10 institutional holders of Harvard Bioscience for the quarter ending December 2025 included WEBER CAPITAL MANAGEMENT LLC /ADV (3.20Mn), VANGUARD GROUP INC (1.92Mn), ACADIAN ASSET MANAGEMENT LLC (1.77Mn), Meros Investment Management, LP (1.22Mn), CORSAIR CAPITAL MANAGEMENT, L.P. (1.11Mn), RENAISSANCE TECHNOLOGIES LLC (1.02Mn), TWO SIGMA INVESTMENTS, LP (1.01Mn), TWO SIGMA ADVISERS, LP (878.56K), BlackRock, Inc. (622.30K), NANO CAP NEW MILLENNIUM GROWTH FUND L P (600.00K).

62 Institutional Holders

907,679 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
WEBER CAPITAL MANAGEMENT LLC /ADV	31 Dec, 2025	3,200,380	3,200,380	0.00%	$2,140,413.00
VANGUARD GROUP INC	31 Dec, 2025	1,923,275	71,429	3.86%	$1,286,671.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	1,772,627	702,937	65.71%	$1,184.00
Meros Investment Management, LP	31 Dec, 2025	1,217,628	299,369	32.60%	$814,365.00
CORSAIR CAPITAL MANAGEMENT, L.P.	31 Dec, 2025	1,108,692	1,008,692	1,008.69%	$741,493.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	1,021,241	152,763	17.59%	$683,006.00
TWO SIGMA INVESTMENTS, LP	31 Dec, 2025	1,012,417	538,260	113.52%	$677,104.00
TWO SIGMA ADVISERS, LP	31 Dec, 2025	878,556	635,400	261.31%	$587,578.00
BlackRock, Inc.	31 Dec, 2025	622,296	929	0.15%	$416,191.00
NANO CAP NEW MILLENNIUM GROWTH FUND L P	31 Dec, 2025	600,000	600,000	0.00%	$401,280.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	546,067	-25,636	-4.48%	$365,210.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	460,793	18,923	4.28%	$308,248.00
JANE STREET GROUP, LLC	31 Dec, 2025	444,959	404,395	996.93%	$297,588.00
Portolan Capital Management, LLC	31 Dec, 2025	409,650	409,650	0.00%	$273,974.00
Williams & Novak, LLC	31 Dec, 2025	348,800	73,300	26.61%	$233,277.00
RBF Capital, LLC	31 Dec, 2025	320,000	160,000	100.00%	$214,016.00
CITIGROUP INC	31 Dec, 2025	193,828	192,319	12,744.80%	$129,632.00
ESSEX INVESTMENT MANAGEMENT CO LLC	31 Dec, 2025	184,678	184,678	0.00%	$123,513.00
STATE STREET CORP	31 Dec, 2025	149,352	0	0.00%	$99,887.00
SUSQUEHANNA INTERNATIONAL GROUP, LLP	31 Dec, 2025	139,869	55,520	65.82%	$93,544.00

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