9 insiders reported 26 Form 4 transactions for HARVARD BIOSCIENCE INC (HBIO) over the past 18 months (most recent 2026-06-12). Recent activity: Eade Katherine A. (Director) Buy 16,556 shares, DENELSKY STEPHEN J (Director) Buy 16,556 shares, Snider William (Director) Buy 16,556 shares, Gagnon Robert E. (Director) Buy 16,556 shares, Benson Seth Benjamin (Director) Buy 16,556 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-12 | Eade Katherine A. | Director | Buy | 16,556 | $0 |
| 2026-06-11 | DENELSKY STEPHEN J | Director | Buy | 16,556 | $0 |
| 2026-06-11 | Snider William | Director | Buy | 16,556 | $0 |
| 2026-06-11 | Gagnon Robert E. | Director | Buy | 16,556 | $0 |
| 2026-06-11 | Benson Seth Benjamin | Director | Buy | 16,556 | $0 |
| 2026-03-23 | Duke John D | Chief Executive Officer | Buy | 75,000 | $0 |
| 2026-03-18 | Snider William | Director | Buy | 12,525 | $62,500 |
| 2026-03-18 | Snider William | Director | Buy | 8,475 | $41,104 |
| 2026-03-18 | DENELSKY STEPHEN J | Director | Buy | 10,000 | $48,700 |
| 2026-03-17 | Duke John D | Chief Executive Officer | Buy | 5,000 | $25,050 |
| 2025-12-30 | Snider William | Director | Buy | 110,000 | $0 |
| 2025-10-07 | DENELSKY STEPHEN J | Director | Buy | 110,000 | $0 |
| 2025-08-19 | Green James W | Director | Sell | 49,048 | $0 |
| 2025-08-19 | Green James W | Director | Sell | 33,200 | $17,596 |
| 2025-08-19 | Green James W | Director | Sell | 119,332 | $0 |
| 2025-08-19 | Green James W | Director | Sell | 11,540 | $6,116 |
| 2025-08-19 | Green James W | Director | Sell | 66,036 | $0 |
| 2025-08-19 | Green James W | Director | Sell | 113,366 | $0 |
| 2025-08-11 | Duke John D | Chief Executive Officer | Buy | 500,000 | $0 |
| 2025-08-11 | Duke John D | Chief Executive Officer | Buy | 500,000 | $0 |
| 2025-07-25 | Benson Seth Benjamin | Director | Buy | 110,000 | $0 |
| 2025-07-18 | Eade Katherine A. | Director | Buy | 110,000 | $0 |
| 2025-07-18 | Gagnon Robert E. | Director | Buy | 110,000 | $0 |
| 2025-05-14 | Frost Mark T | Interim CFO | Buy | 100,000 | $0 |
| 2025-03-21 | Cote Jennifer | Chief Financial Officer | Sell | 5,687 | $3,924 |
Source: SEC Form 4 filings · as of 2026-06-12