SEC Form 4 · Updated Daily
HBIO
— HARVARD BIOSCIENCE, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| GRAZIANO CHANE | 10%+ Owner | 3,005,150 | 2013-11-07 | G |
| Green James W | Director · Officer | 2,796,040 | 2025-08-15 | D |
| HSO LIMITED PARTNERSHIP | 10%+ Owner | 2,757,257 | 2008-05-16 | S |
| Skystone Advisors LLC | 10%+ Owner | 997,831 | 2009-04-01 | J |
| Nelson Kerry | 10%+ Owner | 997,831 | 2009-04-01 | J |
| GREEN DAVID | Director | 925,571 | 2017-02-07 | S |
| LEWIS EARL R | Director | 477,050 | 2018-01-02 | A |
| LUSCINSKI SUSAN M | Officer | 469,720 | 2013-11-01 | J |
| Duchemin Jeffrey | Director · Officer | 464,528 | 2019-07-07 | D |
| KENNEDY JOHN F | Director | 323,344 | 2021-03-23 | G |
| Loewald Thomas W | Director | 295,311 | 2024-05-21 | A |
| EDRICK ALAN I | Director | 273,911 | 2024-05-21 | A |
| Rossi Michael A. | Officer | 267,338 | 2022-12-29 | F |
| Sun Yong | Officer | 242,805 | 2019-01-01 | F |
| Duke John D | Director · Officer | 180,000 | 2026-03-20 | A |
| McNaughton Thomas | Reporting Owner | 171,613 | 2013-11-01 | J |
| UVEGES GEORGE | Director | 169,614 | 2018-03-12 | M |
| Cote Jennifer | Director · Officer | 159,019 | 2025-03-19 | F |
| Olson Kenneth Fletcher | Officer | 158,942 | 2021-12-29 | F |
| HARTE NEAL J | Director | 106,399 | 2016-05-25 | M |
| Unninayar Kamalam | Officer | 73,858 | 2019-03-07 | A |
| Eade Katherine A. | Director | 58,669 | 2026-06-09 | A |
| LOY BERTRAND | Director | 56,575 | 2024-05-21 | A |
| DISHMAN ROBERT A | Director | 51,055 | 2015-04-28 | A |
| Steele Susan M. | Director | 49,400 | 2021-01-04 | A |
| Snider William | Director | 48,556 | 2026-06-09 | A |
| Frost Mark T | Officer | 47,500 | 2026-03-20 | A |
| Singh Yash | Officer | 39,286 | 2019-10-31 | A |
| DENELSKY STEPHEN J | Director | 37,556 | 2026-06-09 | A |
| Gagnon Robert E. | Director | 27,556 | 2026-06-09 | A |
| Benson Seth Benjamin | Director | 27,556 | 2026-06-09 | A |
| Sibony Yoav | Officer | 21,582 | 2015-08-03 | A |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-06-09 | Benson Seth Benjamin | Grant / award | 16,556 | $0.00 | 27,556 |
| 2026-06-09 | Gagnon Robert E. | Grant / award | 16,556 | $0.00 | 27,556 |
| 2026-06-09 | DENELSKY STEPHEN J | Grant / award | 16,556 | $0.00 | 37,556 |
| 2026-06-09 | Snider William | Grant / award | 16,556 | $0.00 | 48,556 |
| 2026-06-09 | Eade Katherine A. | Grant / award | 16,556 | $0.00 | 58,669 |
| 2026-03-20 | Duke John D | Grant / award | 75,000 | $0.00 | 180,000 |
| 2026-03-20 | Frost Mark T | Grant / award | 30,000 | $0.00 | 47,500 |
| 2026-03-17 | Snider William | Open-market buy | 8,475 | $4.85 | 32,000 |
| 2026-03-17 | DENELSKY STEPHEN J | Open-market buy | 10,000 | $4.87 | 21,000 |
| 2026-03-16 | Duke John D | Open-market buy | 5,000 | $5.01 | 105,000 |
| 2026-03-16 | Snider William | Open-market buy | 12,525 | $4.99 | 23,525 |
| 2026-03-16 | Frost Mark T | Open-market buy | 5,000 | $5.00 | 17,500 |
| 2025-12-17 | Snider William | Grant / award | 110,000 | $0.00 | 110,000 |
| 2025-09-05 | DENELSKY STEPHEN J | Grant / award | 110,000 | $0.00 | 110,000 |
| 2025-08-15 | Green James W | Disposition to issuer | 113,366 | $0.00 | 2,452,566 |
| 2025-08-15 | Green James W | Disposition to issuer | 66,036 | $0.00 | 2,565,905 |
| 2025-08-15 | Green James W | Tax withholding | 11,540 | $0.53 | 2,631,968 |
| 2025-08-15 | Green James W | Disposition to issuer | 119,332 | $0.00 | 2,643,508 |
| 2025-08-15 | Green James W | Tax withholding | 33,200 | $0.53 | 2,762,840 |
| 2025-08-15 | Green James W | Disposition to issuer | 49,048 | $0.00 | 2,796,040 |
| 2025-08-08 | Duke John D | Grant / award | 500,000 | $0.00 | 1,000,000 |
| 2025-08-08 | Duke John D | Grant / award | 500,000 | $0.00 | 500,000 |
| 2025-07-16 | Gagnon Robert E. | Grant / award | 110,000 | $0.00 | 110,000 |
| 2025-07-16 | Eade Katherine A. | Grant / award | 110,000 | $0.00 | 421,126 |
| 2025-07-16 | Benson Seth Benjamin | Grant / award | 110,000 | $0.00 | 110,000 |
| 2025-05-12 | Frost Mark T | — | — | — | 25,000 |
| 2025-05-12 | Frost Mark T | Grant / award | 100,000 | $0.00 | 125,000 |
| 2025-03-19 | Green James W | Tax withholding | 38,413 | $0.69 | 2,845,088 |
| 2025-03-19 | Cote Jennifer | Tax withholding | 5,687 | $0.69 | 159,019 |
| 2024-12-31 | Green James W | Disposition to issuer | 145,365 | $0.00 | 2,883,501 |
| 2024-12-29 | Cote Jennifer | Tax withholding | 3,797 | $1.98 | 160,210 |
| 2024-12-29 | Cote Jennifer | Tax withholding | 4,731 | $1.98 | 164,007 |
| 2024-12-29 | Green James W | Tax withholding | 25,310 | $1.98 | 3,028,866 |
| 2024-12-29 | Green James W | Tax withholding | 56,915 | $1.98 | 3,054,176 |
| 2024-06-13 | Green James W | Open-market buy | 10,000 | $2.91 | 3,111,091 |
| 2024-06-06 | Green James W | Open-market buy | 20,000 | $3.07 | 3,101,091 |
| 2024-05-21 | LOY BERTRAND | Grant / award | 56,575 | $0.00 | 56,575 |
| 2024-05-21 | EDRICK ALAN I | Grant / award | 45,872 | $0.00 | 273,911 |
| 2024-05-21 | Eade Katherine A. | Grant / award | 45,872 | $0.00 | 311,126 |
| 2024-05-21 | Loewald Thomas W | Grant / award | 45,872 | $0.00 | 295,311 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.