Updated Jul 16, 2026 · Last SEC filing 2026-06-12
HARVARD BIOSCIENCE INC (HBIO) has filed 5 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-12. 3 Form 8-K material event filings were reported by HBIO in the last 90 days. InsiderAlpha tracks every HBIO SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Laboratory Analytical Instruments (SIC 3826) |
|---|---|
| SEC CIK | 0001123494 |
| Form 4 filings (90d) | 5 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Latest Form 4 filing | 2026-06-12 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Gagnon Robert E. | Director | A — Grant or award | 16.6K | $0.00 | — | SEC | |
| Eade Katherine A. | Director | A — Grant or award | 16.6K | $0.00 | — | SEC | |
| Snider William | Director | A — Grant or award | 16.6K | $0.00 | — | SEC | |
| DENELSKY STEPHEN J | Director | A — Grant or award | 16.6K | $0.00 | — | SEC | |
| Benson Seth Benjamin | Director | A — Grant or award | 16.6K | $0.00 | — | SEC | |
| Duke John D | Chief Executive Officer | A — Grant or award | 75.0K | $0.00 | — | SEC | |
| Frost Mark T | Chief Financial Officer | A — Grant or award | 30.0K | $0.00 | — | SEC | |
| DENELSKY STEPHEN J | Director | P — Open-market purchase | 10.0K | $4.87 | $49K | SEC | |
| Snider William | Director | P — Open-market purchase | 8.5K | $4.85 | $41K | SEC | |
| Duke John D | Chief Executive Officer | P — Open-market purchase | 5.0K | $5.01 | $25K | SEC | |
| Snider William | Director | P — Open-market purchase | 12.5K | $4.99 | $62K | SEC | |
| Snider William | Director | A — Grant or award | 110.0K | $0.00 | — | SEC | |
| DENELSKY STEPHEN J | Director | A — Grant or award | 110.0K | $0.00 | — | SEC | |
| Green James W | Director | F — Tax withholding / forfeiture | 11.5K | $0.53 | $6K | SEC | |
| Green James W | Director | D — Derivative transaction | 66.0K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for HARVARD BIOSCIENCE INC (HBIO). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| DENELSKY STEPHEN J | 1 | — |
| Gagnon Robert E. | 1 | — |
| Eade Katherine A. | 1 | — |
| Benson Seth Benjamin | 1 | — |
| Snider William | 1 | — |
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in HBIO insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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