HBIO · Harvard Bioscience Inc · Shareholders & Ownership

$8.47 +0.12 (+1.44%) Q2 2026 earnings call transcript

Market Cap

$38.01M

4.55M

Volume · Oct 28 5537 Avg daily vol (3M) 18.42K

Every disclosed holder of HBIO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns HBIO

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	36	1,663,825	36.55%	Yes
Insiders (Forms 3, 4, 5)	9	688,552	15.13%	Yes
13D/G-only blocks	4	611,891	13.44%	Yes
Remaining	—	1,588,037	34.88%	Rest
Registered funds (N-PORT, not summed)	19	231,990	5.10%	No

Shares outstanding: 4,552,305, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of HBIO

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	WEBER CAPITAL MANAGEMENT LLC /ADV 13F CIK 1099905 · Registered investment adviser · Sep 30, 2026	299,816	6.59%	-11,045	Sep 30, 2026
2	Green James W Insider CIK 1400121 · Aug 15, 2025 Director, issuer-wide	245,257	5.39%	-39,252	Aug 15, 2025	Director, issuer-wide
3	Leviticus Partners LP 13G CIK 1019432 · Investment adviser · Sep 14, 2026 Rule 13d-1(b), qualified institution	235,000	5.16%	-105,160	Sep 14, 2026	Rule 13d-1(b), qualified institution
4	Harvey Partners, LLC 13G CIK 1406484 · Registered investment adviser · Mar 31, 2025 Rule 13d-1(b), qualified institution	218,750	4.81%	-37,000	Mar 31, 2025	Rule 13d-1(b), qualified institution
5	Meros Investment Management, LP 13F CIK 1911372 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	182,992	4.02%	+64,470	Jun 30, 2026	carried, not yet filed for the newest quarter
6	Duke John D Insider CIK 2071593 · Mar 20, 2026 Director, Chief Executive Officer, issuer-wide	180,000	3.95%	+75,000	Mar 20, 2026	Director, Chief Executive Officer, issuer-wide
7	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	179,614	3.95%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
8	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	169,625	3.73%	+6,312	Jun 30, 2026	carried, not yet filed for the newest quarter
9	272 Capital LP 13G CIK 1841077 · Exempt reporting adviser · Sep 30, 2024 Rule 13d-1(b), qualified institution	155,582	3.42%	-138,346	Sep 30, 2024	Rule 13d-1(b), qualified institution
10	NANO CAP NEW MILLENNIUM GROWTH FUND L P 13F CIK 1277890 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	143,082	3.14%	+25,582	Jun 30, 2026	carried, not yet filed for the newest quarter
11	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	123,470	2.71%	0	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
12	CORSAIR CAPITAL MANAGEMENT, L.P. 13F CIK 1276470 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	122,810	2.70%	-2,000	Jun 30, 2026	carried, not yet filed for the newest quarter
13	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	114,545	2.52%	+428	Jun 30, 2026	carried, not yet filed for the newest quarter
14	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	99,327	2.18%	-2,100	Jun 30, 2026	carried, not yet filed for the newest quarter
15	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	61,834	1.36%	-392	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	BlackRock Advantage Small Cap Core Fund Fund S000039982 · Registered fund · Aug 31, 2026 BlackRock Funds, not summed	30	0.00%	0	Aug 31, 2026	BlackRock Funds, not summed
16	Eade Katherine A. Insider CIK 1721318 · Jun 9, 2026 Director, issuer-wide	58,669	1.29%	+16,556	Jun 9, 2026	Director, issuer-wide
17	Snider William Insider CIK 1340831 · Jun 9, 2026 Director, issuer-wide	48,556	1.07%	+16,556	Jun 9, 2026	Director, issuer-wide
17.1	William Snider 13D CIK 1340831 · Unknown · Dec 17, 2025 Item 4 purpose: Other not summed	84,600	1.86%	—	Dec 17, 2025	not summed
18	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	47,555	1.04%	-11,956	Jun 30, 2026	carried, not yet filed for the newest quarter
19	Frost Mark T Insider CIK 1310262 · Mar 20, 2026 Chief Financial Officer, issuer-wide	47,500	1.04%	+30,000	Mar 20, 2026	Chief Financial Officer, issuer-wide
20	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	42,043	0.92%	+2,200	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
21	DENELSKY STEPHEN J Insider CIK 1204320 · Jun 9, 2026 Director, issuer-wide	37,556	0.83%	+16,556	Jun 9, 2026	Director, issuer-wide
22	Mink Brook Asset Management LLC 13F CIK 2052205 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	33,369	0.73%	+33,369	Jun 30, 2026	carried, not yet filed for the newest quarter
23	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	32,620	0.72%	-13,712	Jun 30, 2026	carried, not yet filed for the newest quarter
24	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	27,730	0.61%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Benson Seth Benjamin Insider CIK 2078549 · Jun 9, 2026 Director, issuer-wide	27,556	0.61%	+16,556	Jun 9, 2026	Director, issuer-wide
26	Gagnon Robert E. Insider CIK 1504983 · Jun 9, 2026 Director, issuer-wide	27,556	0.61%	+16,556	Jun 9, 2026	Director, issuer-wide
27	ESSEX INVESTMENT MANAGEMENT CO LLC 13F CIK 201772 · Registered investment adviser · Sep 30, 2026	26,973	0.59%	0	Sep 30, 2026
28	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	17,581	0.39%	+9,176	Jun 30, 2026	carried, not yet filed for the newest quarter
29	Williams & Novak, LLC 13F CIK 1998419 · Registered investment adviser · Sep 30, 2026	16,555	0.36%	-4,394	Sep 30, 2026
30	RBF Capital, LLC 13F CIK 1134621 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	16,000	0.35%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Cote Jennifer Insider CIK 1960481 · Mar 19, 2025 Chief Financial Officer, issuer-wide	15,902	0.35%	-119	Mar 19, 2025	Chief Financial Officer, issuer-wide
32	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	14,932	0.33%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
33	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	13,982	0.31%	-9,848	Jun 30, 2026	carried, not yet filed for the newest quarter
34	ACUITAS US MICROCAP FUND Fund S000045890 · Registered fund · Jun 30, 2026 FORUM FUNDS II, not summed	13,380	0.29%	+4,597	Jun 30, 2026	FORUM FUNDS II, not summed
35	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	13,251	0.29%	+13,251	Jun 30, 2026	carried, not yet filed for the newest quarter
36	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	10,657	0.23%	+10,657	Jun 30, 2026	carried, not yet filed for the newest quarter
37	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	10,230	0.22%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
38	VANGUARD BALANCED INDEX FUND Fund S000002560 · Registered fund · Jun 30, 2026 VANGUARD VALLEY FORGE FUNDS, not summed	4,112	0.09%	—	Jun 30, 2026	VANGUARD VALLEY FORGE FUNDS, not summed
39	Gabelli Global Mini Mites Fund Fund S000063160 · Registered fund · Jun 30, 2026 GAMCO Global Series Funds, Inc, not summed	4,000	0.09%	0	Jun 30, 2026	GAMCO Global Series Funds, Inc, not summed
40	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	3,179	0.07%	-95	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	22,273	0.49%	-5,496	Aug 31, 2026	Fidelity Concord Street Trust, not summed
40.2	Fidelity Total Market Index Fund Fund S000006026 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	7,017	0.15%	0	Aug 31, 2026	Fidelity Concord Street Trust, not summed
40.3	Fidelity Series Total Market Index Fund Fund S000065248 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	5,946	0.13%	0	Aug 31, 2026	Fidelity Concord Street Trust, not summed
40.4	Fidelity Nasdaq Composite Index Fund Fund S000055366 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	1,699	0.04%	-1,237	Aug 31, 2026	Fidelity Concord Street Trust, not summed
41	PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 13G CIK 1238990 · Registered investment adviser · Mar 31, 2025 Rule 13d-1(b), qualified institution	2,559	0.06%	—	Mar 31, 2025	Rule 13d-1(b), qualified institution
42	Dimensional US Sustainability Core 1 ETF Fund S000076639 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	1,902	0.04%	—	Jul 31, 2026	Dimensional ETF Trust, not summed
43	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,627	0.04%	-1	Jun 30, 2026	carried, not yet filed for the newest quarter
44	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	1,366	0.03%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
45	U.S. VECTOR EQUITY PORTFOLIO Fund S000000982 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	1,229	0.03%	—	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
46	Vanguard Global Advisers, LLC 13F CIK 1811242 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,221	0.03%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	1,029	0.02%	0	Jul 31, 2026	Dimensional ETF Trust, not summed
48	Dimensional US Core Equity 1 ETF Fund S000081780 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	928	0.02%	—	Jul 31, 2026	Dimensional ETF Trust, not summed
49	SBI Securities Co., Ltd. 13F CIK 1851815 · Non-US institution · Sep 30, 2026	866	0.02%	0	Sep 30, 2026
50	Blackstone Alternative Multi-Strategy Fund Fund S000045538 · Registered fund · Jun 30, 2026 Blackstone Alternative Investment Funds, not summed	683	0.02%	0	Jun 30, 2026	Blackstone Alternative Investment Funds, not summed

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 63 holders

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Key facts CIK 1123494 CUSIP 416906204 13F (30d) 6 filings 6 filers Visit website Investor relations