Harvard Bioscience's top three insider shareholders as of May 23, 2026 are James W Green (Chief Executive Officer, 2.45Mn shares), Katherine A. Eade (Director, 421.13K shares), Alan I Edrick (Director, 273.91K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Alan I Edrick | - | 273,911 | 0 | 23 May, 2024 |
| Stephen J Denelsky | - | 21,000 | 0 | 18 Mar, 2026 |
| Mark T Frost | Chief Financial Officer | 47,500 | 0 | 01 Apr, 2026 |
| William Snider | - | 32,000 | 0 | 18 Mar, 2026 |
| James W Green | Chief Executive Officer | 2,452,566 | 0 | 19 Aug, 2025 |
| Robert E. Gagnon | Chief Financial Officer | 110,000 | 0 | 18 Jul, 2025 |
| Katherine A. Eade | - | 421,126 | 0 | 18 Jul, 2025 |
| Michael A. Rossi | Chief Financial Officer | 260,540 | 0 | 03 Jan, 2023 |
| Kenneth Fletcher Olson | Chief Operating Officer | 155,595 | 0 | 30 Dec, 2021 |
| Jennifer Cote | Chief Financial Officer | 159,019 | 0 | 21 Mar, 2025 |
| John D Duke | Chief Executive Officer | 180,000 | 0 | 23 Mar, 2026 |
| Seth Benjamin Benson | - | 110,000 | 0 | 25 Jul, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 20 Mar, 2026 | Mark T Frost | Common Stock | A | 30,000 | $0.00 | 47,500 | D | A |
| 16 Mar, 2026 | Mark T Frost | Common Stock | A | 5,000 | $5.00 | 17,500 | D | P |
| 20 Mar, 2026 | John D Duke | Common Stock | A | 75,000 | $0.00 | 180,000 | D | A |
| 16 Mar, 2026 | William Snider | Common Stock | A | 12,525 | $4.99 | 23,525 | D | P |
| 17 Mar, 2026 | Stephen J Denelsky | Common Stock | A | 10,000 | $4.87 | 21,000 | D | P |
| 17 Mar, 2026 | William Snider | Common Stock | A | 8,475 | $4.85 | 32,000 | D | P |
| 16 Mar, 2026 | John D Duke | Common Stock | A | 5,000 | $5.01 | 105,000 | D | P |
| 17 Dec, 2025 | William Snider | Common Stock | A | 110,000 | $0.00 | 110,000 | D | A |
| 05 Sep, 2025 | Stephen J Denelsky | Common Stock | A | 110,000 | $0.00 | 110,000 | D | A |
| 15 Aug, 2025 | James W Green | Common Stock | D | 49,048 | $0.00 | 2,796,040 | D | D |
| 15 Aug, 2025 | James W Green | Common Stock | D | 33,200 | $0.53 | 2,762,840 | D | F |
| 15 Aug, 2025 | James W Green | Common Stock | D | 119,332 | $0.00 | 2,643,508 | D | D |
| 15 Aug, 2025 | James W Green | Common Stock | D | 11,540 | $0.53 | 2,631,968 | D | F |
| 15 Aug, 2025 | James W Green | Common Stock | D | 66,036 | $0.00 | 2,565,905 | D | D |
| 15 Aug, 2025 | James W Green | Common Stock | D | 113,366 | $0.00 | 2,452,566 | D | D |
| 08 Aug, 2025 | John D Duke | Common Stock | A | 500,000 | $0.00 | 500,000 | D | A |
| 08 Aug, 2025 | John D Duke | Common Stock | A | 500,000 | $0.00 | 1,000,000 | D | A |
| 16 Jul, 2025 | Seth Benjamin Benson | Common Stock | A | 110,000 | $0.00 | 110,000 | D | A |
| 16 Jul, 2025 | Katherine A. Eade | Common Stock | A | 110,000 | $0.00 | 421,126 | D | A |
| 16 Jul, 2025 | Robert E. Gagnon | Common Stock | A | 110,000 | $0.00 | 110,000 | D | A |