Harvard Bioscience HBIO Institutional Ownership

NASDAQ HBIO

$8.49 +0.15 (+1.80%)

At close: Oct 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

37 Institutions

Increased 9 24.3%

Unchanged 12 32.4%

Reduced 16 43.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

36.89%

▲+1.74 pp QoQ

Shares Held by Institutions

1.68Mn

of 4.55Mn outstanding

▲+5.92% QoQ

Shares Outstanding

4.55Mn

2.87Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

■0 vs prior quarter

Net Shares Added (QoQ)

+93.84K

accumulated since last quarter

Value of Holdings

$14.01Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Harvard Bioscience Inc (NASDAQ:HBIO) counted 37 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

These investors held 36.89% of outstanding shares in Q2 2026, up from 35.16% the quarter before.
Total shares held in Harvard Bioscience rose 5.92% versus Q1 2026, while the number of holders fell 44.78% versus Q2 2025.
Looking at the 37 holders of HBIO individually, 9 added to their positions, 16 reduced their stakes and 12 left their positions unchanged.
The aggregate institutional position in Harvard Bioscience was 1.68Mn shares at the end of Q2 2026, up 93.84K from the prior quarter and down 209.06K from a year earlier.
As of June 30, 2026, the biggest holder of Harvard Bioscience was Weber Capital Management LLC with 310.86K shares, or 6.83% of shares outstanding.
The largest position increases in HBIO for Q2 2026 were by Meros Investment Management, LP (+64.47K shares), Nano Cap New Millennium Growth Fund L.P. (+25.58K shares), UBS Group AG (+9.18K shares), Vanguard Capital Management LLC (+6.31K shares) and Two Sigma Investments, LP (+428 shares).
Among holders that kept a stake in Harvard Bioscience, the biggest sellers in Q2 2026 were Millennium Management LLC (-13.71K shares), Geode Capital Management, LLC (-11.96K shares), Jane Street Group, LLC (-9.85K shares), Weber Capital Management LLC (-9.18K shares) and Williams & Novak Wealth Management, LLC (-6.1K shares).
Harvard Bioscience's 10 largest institutional shareholders as of Q2 2026 were Weber Capital Management LLC (310.86K shares), Meros Investment Management, LP (182.99K shares), Acadian Asset Management LLC (179.61K shares), Vanguard Capital Management LLC (169.62K shares), Nano Cap New Millennium Growth Fund L.P. (143.08K shares), Corsair Capital Management, L.P. (122.81K shares), Two Sigma Investments, LP (114.55K shares), Renaissance Technologies LLC (99.33K shares), BlackRock, Inc. (61.83K shares) and Geode Capital Management, LLC (47.55K shares), per Business Quant data.

Form 13F Holdings

37 Institutional Holders

Report period 30 Jun, 2026

Total shares held 1.68Mn

Of outstanding 36.89%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	WEBER CAPITAL MANAGEMENT LLC /ADV	0001099905	310,861	6.83%	▼9,176	-2.87%	$1.91Mn
2	Meros Investment Management, LP	0001911372	182,992	4.02%	▲64,470	+54.39%	$1.13Mn
3	ACADIAN ASSET MANAGEMENT LLC	0000916542	179,614	3.95%	0	0.00%	$1.10K
4	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	169,625	3.73%	▲6,312	+3.86%	$1.04Mn
5	NANO CAP NEW MILLENNIUM GROWTH FUND L P	0001277890	143,082	3.14%	▲25,582	+21.77%	$879.95K
6	CORSAIR CAPITAL MANAGEMENT, L.P.	0001276470	122,810	2.70%	▼2,000	-1.60%	$755.28K
7	TWO SIGMA INVESTMENTS, LP	0001179392	114,545	2.52%	▲428	+0.38%	$704.45K
8	RENAISSANCE TECHNOLOGIES LLC	0001037389	99,327	2.18%	▼2,100	-2.07%	$610.86K
9	BlackRock, Inc.	0002012383	61,834	1.36%	▼392	-0.63%	$380.28K
10	GEODE CAPITAL MANAGEMENT, LLC	0001214717	47,555	1.04%	▼11,956	-20.09%	$292.53K
11	Mink Brook Asset Management LLC	0002052205	33,369	0.73%	▲33,369	0.00%	$205.22K
12	MILLENNIUM MANAGEMENT LLC	0001273087	32,620	0.72%	▼13,712	-29.60%	$200.61K
13	VANGUARD FIDUCIARY TRUST CO	0000933478	27,730	0.61%	0	0.00%	$170.54K
14	ESSEX INVESTMENT MANAGEMENT CO LLC	0000201772	26,973	0.59%	▼48	-0.18%	$165.88K
15	Williams & Novak Wealth Management, LLC	0001998419	20,949	0.46%	▼6,103	-22.56%	$128.84K
16	UBS Group AG	0001610520	17,581	0.39%	▲9,176	+109.17%	$108.12K
17	RBF Capital, LLC	0001134621	16,000	0.35%	0	0.00%	$98.40K
18	State Street Corp	0000093751	14,932	0.33%	0	0.00%	$91.83K
19	JANE STREET GROUP, LLC	0001595888	13,982	0.31%	▼9,848	-41.33%	$85.99K
20	CITADEL ADVISORS LLC	0001423053	13,251	0.29%	▲13,251	0.00%	$81.49K

Showing 1 to 20 of 37 holders