Harvard Bioscience Inc
HBIO- Exchange
- Nasdaq
- Industry
- Laboratory Analytical Instruments
- SEC CIK
- 0001123494
No open-market purchases or sales by Harvard Bioscience Inc insiders were filed in the last 90 days; 37 institutions reported holding it in 13F filings for Q2 2026, worth $10.3M in total; no superinvestor holds it.
Holders of 5% or more of HBIO
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Harvard Bioscience Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Snider William | 13D | 15.97%846.0K shares | New | Mar 23, 20261 filing | Mar 23, 2026 | SEC |
| Weber Capital Management LLC | 13G/A | 7.26%3.20M shares | +1.49 ppfrom 5.77% | Feb 10, 20252 filings | May 8, 2025 | SEC |
| Leviticus Partners LP | 13G/A | 5.20%235.0K shares | −1.30 ppfrom 6.50% | Dec 21, 202215 filings | Sep 22, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
39 Schedule 13D and 13G filings on Harvard Bioscience Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Sep 22, 202610:21 AM ET | Leviticus Partners LP | 13G/A | 5.20%235.0K shares | −1.30 ppfrom 6.50% | Sep 14, 2026 | SEC |
| May 14, 20261:08 PM ET | Leviticus Partners LP | 13G/A | 6.50%293.7K shares | −1.10 ppfrom 7.60% | May 12, 2025 | SEC |
| Mar 23, 20268:00 AM ET | Snider Williamand 3 others | 13D | 15.97%846.0K shares | New | Dec 17, 2025 | SEC |
| Feb 12, 202611:27 AM ET | Leviticus Partners LP | 13G/A | 7.60%3.40M shares | +0.10 ppfrom 7.50% | Dec 31, 2025 | SEC |
| Nov 3, 20259:57 AM ET | Leviticus Partners LP | 13G/A | 7.50%3.35M shares | −1.70 ppfrom 9.20% | Oct 30, 2025 | SEC |
| Aug 7, 202510:00 AM ET | Leviticus Partners LPand 1 other | 13G/A | 9.20%4.05M shares | +1.10 ppfrom 8.10% | Aug 6, 2025 | SEC |
| Jul 17, 20258:12 PM ET | BlackRock, Inc. | 13G/A | 2.50%1.11M shares | –Below 5% | Jun 30, 2025 | SEC |
| May 30, 202511:50 AM ET | Leviticus Partners LPand 1 other | 13G/A | 8.10%3.60M shares | −1.70 ppfrom 9.80% | May 29, 2025 | SEC |
| May 15, 20254:10 PM ET | Harvey Partners, LLC | 13G/A | 4.96%2.19M shares | –Below 5% | Mar 31, 2025 | SEC |
| May 14, 202512:28 PM ET | Leviticus Partners LPand 1 other | 13G/A | 9.80%4.33M shares | +1.20 ppfrom 8.60% | May 13, 2025 | SEC |
| May 8, 202512:45 PM ET | Weber Capital Management LLC | 13G/A | 7.26%3.20M shares | +1.49 ppfrom 5.77% | Mar 31, 2025 | SEC |
| Apr 8, 20259:49 AM ET | Leviticus Partners LPand 1 other | 13G/A | 8.60%3.77M shares | +1.10 ppfrom 7.50% | Apr 1, 2025 | SEC |
| Apr 7, 20254:06 PM ET | Punch & Associates Investment Management, Inc. | 13G/A | 0.10%25.6K shares | –Below 5% | Mar 31, 2025 | SEC |
| Mar 17, 202510:33 AM ET | Leviticus Partners LPand 1 other | 13G | 7.50%3.28M shares | +2.60 ppfrom 4.90% | Mar 14, 2025 | SEC |
| Feb 10, 20254:56 PM ET | Weber Capital Management LLC | 13G | 5.77%2.52M shares | New | Dec 31, 2024 | SEC |
| Feb 4, 202510:37 AM ET | Leviticus Partners LPand 1 other | 13G/A | 4.90%2.14M shares | –Below 5% | Feb 3, 2025 | SEC |
| Mar 19, 2024 | Leviticus Partners LP | 13GOld format | – | – | – | SEC |
| Feb 14, 2024 | Harvey Partners, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Punch & Associates Investment Management, Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | B. Riley Asset Management, LLC | 13G/AOld format | – | – | – | SEC |
| Jan 26, 20245:26 PM ET | BlackRock Inc. | 13GOld format | – | – | – | SEC |
| Jan 22, 2024 | Leviticus Partners LP | 13G/AOld format | – | – | – | SEC |
| Aug 28, 2023 | Leviticus Partners LP | 13GOld format | – | – | – | SEC |
| Feb 16, 2023 | B. Riley Asset Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 15, 2023 | B. Riley Asset Management, LLC | 13GOld format | – | New | – | SEC |
| Feb 14, 2023 | Harvey Partners, LLC | 13GOld format | – | New | – | SEC |
| Feb 13, 2023 | Punch & Associates Investment Management, Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2023 | Portolan Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Jan 11, 2023 | Leviticus Partners LP | 13G/AOld format | – | – | – | SEC |
| Dec 21, 2022 | Leviticus Partners LP | 13GOld format | – | New | – | SEC |
| Jul 8, 20224:57 PM ET | BlackRock Inc. | 13GOld format | – | – | – | SEC |
| Feb 14, 2022 | Punch & Associates Investment Management, Inc. | 13GOld format | – | New | – | SEC |
| Feb 11, 2022 | Portolan Capital Management, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 8, 2022 | Dimensional Fund Advisors LP | 13G/AOld format | – | – | – | SEC |
| Feb 2, 20227:11 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Sep 3, 2021 | Portolan Capital Management, LLC | 13GOld format | – | New | – | SEC |
| Feb 16, 2021 | Potomac Capital Management, Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 12, 2021 | Dimensional Fund Advisors LP | 13G/AOld format | – | – | – | SEC |
| Feb 2, 20212:56 PM ET | BlackRock Inc. | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Harvard Bioscience Inc shares.
No Form 144 notices for Harvard Bioscience Inc are on file.