As of April 28, 2026, Harvard Bioscience's top three insider holders 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 |
|---|---|---|---|---|
| James W Green | Chief Executive Officer | 2,452,566 | 0 | 19 Aug, 2025 |
| Katherine A. Eade | - | 421,126 | 0 | 18 Jul, 2025 |
| Alan I Edrick | - | 273,911 | 0 | 23 May, 2024 |
| Michael A. Rossi | Chief Financial Officer | 260,540 | 0 | 03 Jan, 2023 |
| John D Duke | Chief Executive Officer | 180,000 | 0 | 23 Mar, 2026 |
| Jennifer Cote | Chief Financial Officer | 159,019 | 0 | 21 Mar, 2025 |
| Kenneth Fletcher Olson | Chief Operating Officer | 155,595 | 0 | 30 Dec, 2021 |
| Robert E. Gagnon | Chief Financial Officer | 110,000 | 0 | 18 Jul, 2025 |
| Seth Benjamin Benson | - | 110,000 | 0 | 25 Jul, 2025 |
| Mark T Frost | Chief Financial Officer | 47,500 | 0 | 01 Apr, 2026 |
| William Snider | - | 32,000 | 0 | 18 Mar, 2026 |
| Stephen J Denelsky | - | 21,000 | 0 | 18 Mar, 2026 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 16 Mar, 2026 | Mark T Frost | Common Stock | A | 5,000 | $5.00 | 17,500 | D | P |
| 20 Mar, 2026 | Mark T Frost | Common Stock | A | 30,000 | $0.00 | 47,500 | D | A |
| 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 |