HARVARD BIOSCIENCE INC
COM · CUSIP 416906105
68
institutional holders
-24 vs Q1 2025
18.9m
shares reported held*
$8.4mreported value*
13 new
19 added
27 reduced
37 sold out
net sold ≈ $3.0m (-6.7m shares)
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $0.44. Options: 5 managers hold calls ($60.9k notional), 4 hold puts ($10.0k).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 79 |
| Q4 2022 | 69 |
| Q1 2023 | 67 |
| Q2 2023 | 101 |
| Q3 2023 | 95 |
| Q4 2023 | 94 |
| Q1 2024 | 91 |
| Q2 2024 | 101 |
| Q3 2024 | 95 |
| Q4 2024 | 96 |
| Q1 2025 | 92 |
| Q2 2025 | 68 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Bought or addedCut or sold out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 48 | 41 |
| Q4 2023 | 41 | 36 |
| Q1 2024 | 35 | 50 |
| Q2 2024 | 61 | 35 |
| Q3 2024 | 43 | 45 |
| Q4 2024 | 47 | 39 |
| Q1 2025 | 31 | 47 |
| Q2 2025 | 32 | 64 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
CallsPuts
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $1.9k | $25.6k | 13.62 |
| Q4 2024 | $2.1k | $50.9k | 24.13 |
| Q1 2025 | $5.5k | $4.5k | 0.81 |
| Q2 2025 | $60.9k | $10.0k | 0.16 |
Biggest buyers
| UBS Group AG | Added | +768.6k |
| MILLENNIUM MANAGEMENT LLC | New | +639.9k |
| MARSHALL WACE, LLP | New | +138.7k |
| Meros Investment Management, LP | Added | +125.3k |
| AMH Equity Ltd | Added | +121.3k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +77.7k |
| GOLDMAN SACHS GROUP INC | Added | +61.3k |
| JANE STREET GROUP, LLC | Added | +58.8k |
| Qube Research & Technologies Ltd | New | +51.2k |
| FMR LLC | Added | +49.2k |
Biggest sellers
| ROYCE & ASSOCIATES LP | Sold out | -1.8m |
| BlackRock, Inc. | Reduced | -1.7m |
| HEARTLAND ADVISORS INC | Sold out | -1.1m |
| STATE STREET CORP | Reduced | -595.9k |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -483.0k |
| CITADEL ADVISORS LLC | Sold out | -330.0k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -311.6k |
| VANGUARD GROUP INC | Reduced | -284.9k |
| BARD ASSOCIATES INC | Sold out | -251.8k |
| NORTHERN TRUST CORP | Reduced | -229.7k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $35.4k79.8k shares |
| GROUP ONE TRADING LLC | Added | $13.6k30.6k shares |
| WOLVERINE TRADING, LLC | New | $9.9k21.3k shares |
| SIMPLEX TRADING, LLC | New | $2.0k6.0k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $5.1k11.5k shares |
| WOLVERINE TRADING, LLC | New | $4.9k10.5k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
| SIMPLEX TRADING, LLC | Reduced | $0100 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| WEBER CAPITAL MANAGEMENT LLC /ADV 13G · institution +1.5 pts · filed 2025-05-08 | 7.3% |
| Leviticus Partners LP 13G · institution -1.3 pts · filed 2026-09-22 | 5.2% |
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| AMH Equity Ltd 2.29% of their portfolio | 3.5m $1.6m | Added +121.3k |
| Harvey Partners, LLC 0.09% of their portfolio | 2.1m $950.2k | Reduced -46.4k |
| VANGUARD GROUP INC 0.00% of their portfolio | 1.9m $823.1k | Reduced -284.9k |
| Granahan Investment Management, LLC 0.03% of their portfolio | 1.5m $666.4k | Reduced -26.4k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 1.1m $499.9k | Reduced -311.6k |
| BlackRock, Inc. 0.00% of their portfolio | 1.1m $494.6k | Reduced -1.7m |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 1.0m $459.0k | Reduced -37.8k |
| Meros Investment Management, LP 0.19% of their portfolio | 919.9k $408.3k | Added +125.3k |
| UBS Group AG 0.00% of their portfolio | 792.2k $351.7k | Added +768.6k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 792.0k $351.5k | Reduced -91.7k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 639.9k $284.0k | New |
| Acuitas Investments, LLC 0.17% of their portfolio | 491.1k $217.9k | Unchanged |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 440.0k $195.3k | Reduced -483.0k |
| Pasadena Private Wealth, LLC 0.02% of their portfolio | 243.9k $108.2k | Added +45.9k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 207.6k $92.2k | Added +61.3k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 197.8k $87.8k | Added +24.5k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 188.9k $83.8k | Reduced -229.7k |
| RBF Capital, LLC 0.00% of their portfolio | 160.0k $71.0k | Reduced -20.9k |
| STATE STREET CORP 0.00% of their portfolio | 149.4k $66.3k | Reduced -595.9k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 140.5k $62.3k | Added +77.7k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 138.7k $61.0k | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 126.2k $56.0k | Reduced -83.3k |
| Williams & Novak, LLC 0.04% of their portfolio | 106.6k $47.3k | Added +28.8k |
| GAMCO INVESTORS, INC. ET AL 0.00% of their portfolio | 77.0k $34.2k | Reduced -8.0k |
| FMR LLC 0.00% of their portfolio | 72.3k $32.1k | Added +49.2k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 70.7k $31.4k | Added +58.8k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 51.2k $22.7k | New |
| GABELLI FUNDS LLC 0.00% of their portfolio | 50.0k $22.2k | Reduced -15.0k |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 46.9k $20.8k | Reduced -88.7k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 45.7k $20.3k | Added +22.9k |
| HRT FINANCIAL LP 0.00% of their portfolio | 41.5k $18.0k | New |
| Abel Hall, LLC 0.01% of their portfolio | 37.3k $16.6k | New |
| Assenagon Asset Management S.A. 0.00% of their portfolio | 36.8k $16.3k | Reduced -17.6k |
| Callan Family Office, LLC 0.00% of their portfolio | 29.8k $13.2k | New |
| MORGAN STANLEY 0.00% of their portfolio | 29.6k $13.1k | Reduced -55.1k |
| GREENWOOD CAPITAL ASSOCIATES LLC 0.00% of their portfolio | 27.8k $12.3k | Reduced -735 |
| Point72 Asia (Singapore) Pte. Ltd. 0.00% of their portfolio | 27.2k $12.1k | New |
| Virtu Financial LLC 0.00% of their portfolio | 26.5k $12.0k | New |
| BRIGHTON JONES LLC 0.00% of their portfolio | 25.1k $11.1k | Added +92 |
| SG Americas Securities, LLC 0.00% of their portfolio | 21.5k $10.0k | Added +9.8k |
| Y-Intercept (Hong Kong) Ltd 0.00% of their portfolio | 16.9k $7.5k | New |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 15.6k $6.9k | Added +477 |
| CERTUITY, LLC 0.00% of their portfolio | 14.7k $6.5k | Unchanged |
| Legato Capital Management LLC 0.00% of their portfolio | 14.0k $6.2k | Reduced -690 |
| CITIGROUP INC 0.00% of their portfolio | 13.8k $6.1k | Reduced -15.6k |
| Ethic Inc. 0.00% of their portfolio | 13.0k $6.0k | New |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 12.5k $5.5k | Reduced -77.0k |
| Balboa Wealth Partners 0.00% of their portfolio | 11.8k $5.2k | Added +500 |
| XTX Topco Ltd 0.00% of their portfolio | 11.1k $4.9k | New |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 8.7k $3.8k | Unchanged |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 7.5k $3.4k | Reduced -377 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 6.5k $2.9k | Reduced -17.7k |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 4.8k $2.1k | Added +4.4k |
| Brown Shipley& Co Ltd 0.00% of their portfolio | 4.8k $2.1k | Unchanged |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 3.8k $1.7k | New |
| CWM, LLC 0.00% of their portfolio | 3.4k $1.0k | Added +2.0k |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 2.3k $1.0k | Added +1.8k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 1.8k $778 | Reduced -60.5k |
| FEDERATED HERMES, INC. 0.00% of their portfolio | 1.7k $735 | Unchanged |
| EverSource Wealth Advisors, LLC 0.00% of their portfolio | 1.4k $611 | Added +1.1k |
| Rialto Wealth Management, LLC 0.00% of their portfolio | 1.1k $480 | New |
| Transce3nd, LLC 0.00% of their portfolio | 938 $416 | Unchanged |
| BARCLAYS PLC 0.00% of their portfolio | 892 $395 | Reduced -40.9k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 803 $356 | Reduced -22.4k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 314 $0 | Reduced -1.9k |
| TSFG, LLC 0.00% of their portfolio | 300 $0 | Unchanged |
| Financial Connections Group, Inc. 0.00% of their portfolio | 300 $0 | Unchanged |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio | 0 $0 | Unchanged |