HBIO · Harvard Bioscience Inc

$7.65 +0.07 (+0.92%) At close · Aug 26

Market Cap

$34.51M

4.55M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 37

Total Value: $10,328,835

Total Shares: 1,679,489

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 37 13F filers · Δ vs Mar 31, 2026

Top Holder

18.5%

−1.7 pts

Top 5

58.7%

+1.6 pts

Top 10

85.3%

−0.6 pts

HHI

926

Broadly held−33

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: 0

Institutional value: +33.8%

Shares held: +5.9%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Small Meros Investment Management, LP	+64,470	182,992
Small NANO CAP NEW MILLENNIUM GROWTH FUND L P	+25,582	143,082
Mega UBS Group AG	+9,176	17,581
Mega VANGUARD CAPITAL MANAGEMENT LLC	+6,312	169,625
Mega TWO SIGMA INVESTMENTS, LP	+428	114,545

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega MILLENNIUM MANAGEMENT LLC	−13,712	32,620
Mega GEODE CAPITAL MANAGEMENT, LLC	−11,956	47,555
Mega JANE STREET GROUP, LLC	−9,848	13,982
Small WEBER CAPITAL MANAGEMENT LLC /ADV	−9,176	310,861
Micro Williams & Novak, LLC	−6,103	20,949

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Small Mink Brook Asset Management LLC	33,369	$205,219
Mega CITADEL ADVISORS LLC	13,251	$81,493
Mega GOLDMAN SACHS GROUP INC	10,657	$65,540
Mega BARCLAYS PLC	26	$159

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega CITIGROUP INC	6,273	$30,549
Large FEDERATED HERMES, INC.	73	$355
Micro Financial Connections Group, Inc.	30	$146
Large CWM, LLC	4	$19

Filter: New 4 Increased 5 Reduced 16 Sold out 4 Unchanged 12

Showing 37 of 37

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

WEBER CAPITAL MANAGEMENT LLC /ADV

$1,911,795

18.51%

310,861

Meros Investment Management, LP

$1,125,400

10.90%

182,992

ACADIAN ASSET MANAGEMENT LLC

$1,104,626

10.69%

179,614

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	179,614	$1,104,626	100.0%	Defined

VANGUARD CAPITAL MANAGEMENT LLC

$1,043,193

10.10%

169,625

NANO CAP NEW MILLENNIUM GROWTH FUND L P

$879,954

8.52%

143,082

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AZG TANGIBLE ASSETS FUND LLC	143,082	$879,954	100.0%	Sole

CORSAIR CAPITAL MANAGEMENT, L.P.

$755,281

7.31%

122,810

TWO SIGMA INVESTMENTS, LP

$704,451

6.82%

114,545

RENAISSANCE TECHNOLOGIES LLC

$610,861

5.91%

99,327

BlackRock, Inc.

$380,277

3.68%

61,834

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	91	$559	0.1%	Sole
BLACKROCK ADVISORS LLC	30	$184	0.0%	Sole
BlackRock Institutional Trust Company, N.A.	61,713	$379,534	99.8%	Sole

GEODE CAPITAL MANAGEMENT, LLC

$292,462

2.83%

47,555

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	10,430	$64,144	21.9%	Defined
Held directly	37,125	$228,318	78.1%	Defined

Mink Brook Asset Management LLC

$205,219

1.99%

33,369

MILLENNIUM MANAGEMENT LLC

$200,613

1.94%

32,620

VANGUARD FIDUCIARY TRUST CO

$170,539

1.65%

27,730

ESSEX INVESTMENT MANAGEMENT CO LLC

$165,883

1.61%

26,973

Williams & Novak, LLC

$128,836

1.25%

20,949

UBS Group AG

$108,122

1.05%

17,581

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	1	$6	0.0%	Defined
UBS AG	16,801	$103,326	95.6%	Defined
UBS Securities LLC	779	$4,790	4.4%	Defined

RBF Capital, LLC

$98,400

0.95%

16,000

STATE STREET CORP

$91,831

0.89%

14,932

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS TRUST COMPANY	14,932	$91,831	100.0%	Defined

JANE STREET GROUP, LLC

$85,988

0.83%

13,982

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	5,396	$33,185	38.6%	Defined
Jane Street Global Trading, LLC	8,586	$52,803	61.4%	Defined

CITADEL ADVISORS LLC

$81,493

0.79%

13,251

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	13,251	$81,493	100.0%	Defined

GOLDMAN SACHS GROUP INC

$65,540

0.63%

10,657

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	10,657	$65,540	100.0%	Defined

Bank of New York Mellon Corp

$62,913

0.61%

10,230

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
The Bank of New York Mellon	398	$2,447	3.9%	Defined
Newton Investment Management North America, LLC	9,832	$60,466	96.1%	Defined

FMR LLC

$19,550

0.19%

3,179

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	3,179	$19,550	100.0%	Defined

MORGAN STANLEY

$10,006

0.10%

1,627

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY SMITH BARNEY LLC	1,627	$10,006	100.0%	Defined

Vanguard Global Advisers, LLC

$7,509

0.07%

1,221

SBI Securities Co., Ltd.

$5,325

0.05%

866

Tower Research Capital LLC (TRC)

$3,567

0.03%

580

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	580	$3,567	100.0%	Defined

Brown Shipley& Co Ltd

$2,939

0.03%

478

GROUP ONE TRADING LLC

$1,476

0.01%

240

NISA INVESTMENT ADVISORS, LLC

$1,402

0.01%

228

PENSION & WEALTH MANAGEMENT ADVISORS, INC.

$1,383

0.01%

225

JPMORGAN CHASE & CO

$1,198

0.01%

195

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Securities LLC	163	$1,002	83.6%	Defined
J.P. Morgan Securities plc	32	$196	16.4%	Defined

BNP PARIBAS ARBITRAGE, SA

$405

0.00%

BARCLAYS PLC

$159

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	26	$159	100.0%	Defined

ROYAL BANK OF CANADA

$92

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC Capital Markets, LLC	15	$92	100.0%	Defined

PNC FINANCIAL SERVICES GROUP, INC.

$86

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	14	$86	100.0%	Defined

SHP Wealth Management

$61

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	6,273	$30,549	100.0%	Defined

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
FEDERATED MDTA LLC	73	$355	100.0%	Defined

Key facts CIK 1123494 CUSIP 416906204 13F (30d) 41 filings 34 filers Visit website Investor relations