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Equibles

HBIO

Harvard Bioscience Inc

Company with tickers: HBIO

CIK
1123494
CUSIP
416906204
Shares Outstanding
4,510,182
13F Activity (30d)
2 filings 2 filers

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.

Holders: 33
Total Value: $6,571,441
Total Shares: 1,349,376

Institutional Ownership Trend

3 quarters

Holder Concentration

Across 33 13F filers
Top Holder
23.7%
Jun 2025 → Mar 2026 · range 23.7% – 100.0%
of institutional value
Top 5
66.8%
Jun 2025 → Mar 2026 · range 66.8% – 100.0%
of institutional value
Top 10
88.9%
Jun 2025 → Mar 2026 · range 88.9% – 100.0%
of institutional value
HHI
1,172
Jun 2025 → Mar 2026 · range 1,172 – 10,000
Broadly held

Quarterly Activity

vs Dec 17, 2025
New
33
Increased
0
Decreased
0
Sold Out
1
Unchanged
0
Holder count: +32
Institutional value: -1.7%
Shares held: +59.5%

Top New Positions

vs Dec 17, 2025
Institution Acquired Value (USD) Open
Micro WEBER CAPITAL MANAGEMENT LLC /ADV 320,037 $1,558,580
Large ACADIAN ASSET MANAGEMENT LLC 179,614 $874,720
Mega VANGUARD CAPITAL MANAGEMENT LLC 163,313 $795,334
Small CORSAIR CAPITAL MANAGEMENT, L.P. 124,810 $607,824
Mega TWO SIGMA INVESTMENTS, LP 114,117 $555,749

Top Sold-Out Positions

vs Dec 17, 2025
Institution Previously Held Last Value (USD) Open
— William Snider 846,000 $6,683,400
Filter: New 33 Increased 0 Reduced 0 Sold out 1 Unchanged 0
Showing 33 of 33
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Micro WEBER CAPITAL MANAGEMENT LLC /ADV $1,558,580 23.72% 320,037
Large ACADIAN ASSET MANAGEMENT LLC $874,720 13.31% 179,614
Mega VANGUARD CAPITAL MANAGEMENT LLC $795,334 12.10% 163,313
Small CORSAIR CAPITAL MANAGEMENT, L.P. $607,824 9.25% 124,810
Mega TWO SIGMA INVESTMENTS, LP $555,749 8.46% 114,117
Large RENAISSANCE TECHNOLOGIES LLC $493,949 7.52% 101,427
Mega BlackRock, Inc. $303,039 4.61% 62,226
Mega GEODE CAPITAL MANAGEMENT, LLC $289,818 4.41% 59,511
Mega MILLENNIUM MANAGEMENT LLC $225,636 3.43% 46,332
Mega VANGUARD FIDUCIARY TRUST CO Bank $135,045 2.06% 27,730
Micro Williams & Novak, LLC $131,743 2.00% 27,052
Small ESSEX INVESTMENT MANAGEMENT CO LLC $131,592 2.00% 27,021
Mega JANE STREET GROUP, LLC $116,051 1.77% 23,830
Mid RBF Capital, LLC $77,920 1.19% 16,000
Mega STATE STREET CORP $72,718 1.11% 14,932
Mega Bank of New York Mellon Corp Bank $49,819 0.76% 10,230
Mega UBS Group AG $40,931 0.62% 8,405
Mega CITIGROUP INC $30,549 0.46% 6,273
Mega JPMORGAN CHASE & CO $21,733 0.33% 4,463
Mega FMR LLC $15,944 0.24% 3,274
Mid GROUP ONE TRADING LLC $10,626 0.16% 2,182
Mega MORGAN STANLEY $7,927 0.12% 1,628
Mega Vanguard Global Advisers, LLC $5,946 0.09% 1,221
Mid Tower Research Capital LLC (TRC) $5,610 0.09% 1,152
Mid SBI Securities Co., Ltd. Broker-Dealer $4,217 0.06% 866
Mega ROYAL BANK OF CANADA Bank $4,163 0.06% 855
Small Brown Shipley& Co Ltd $2,327 0.04% 478
Large NISA INVESTMENT ADVISORS, LLC $1,110 0.02% 228
Large FEDERATED HERMES, INC. $355 0.01% 73
Mega BNP PARIBAS ARBITRAGE, SA $331 0.01% 68
Mega PNC FINANCIAL SERVICES GROUP, INC. $68 0.00% 14
Small SHP Wealth Management $48 0.00% 10
Large CWM, LLC $19 0.00% 4

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