Harvard Bioscience
Builds research tools for preclinical and cellular-and-molecular science.
$7.93
After-hours close+0.02 (+0.25%)
At close$7.91(+0.13%)
Something off on this page? Send us feedback.
Breakdown13F · Form 4
Institutions 35.16%1.59M sharesInsiders 15.27%688.6K sharesOther 49.57%2.24M shares
Shares outstanding 4.51M · Float 3.51M · 77.7% free float
A split settled inside the quarter being compared, so quarter-on-quarter change is not shown.
Institutions13F, as of Mar 31, 2026
36 holders · 1.59M shares
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Weber Capital Management LLC /Adv | 320.0K | 7.10% | Apr 23, 2026 | |
| Acadian Asset Management LLC | 179.6K | 3.98% | May 13, 2026 | |
| Vanguard Capital Management LLC | 163.3K | 3.62% | May 15, 2026 | |
| Corsair Capital Management, L.P. | 124.8K | 2.77% | May 15, 2026 | |
| Meros Investment Management, LP | 118.5K | 2.63% | May 14, 2026 | |
| Nano Cap New Millennium Growth Fund L P | 117.5K | 2.61% | May 15, 2026 | |
| Two Sigma Investments, LP | 114.1K | 2.53% | May 15, 2026 | |
| Renaissance Technologies LLC | 101.4K | 2.25% | May 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| William Sniderincl. BroadOak Capital Partners, LLC, BroadOak Fund VI, L.P. +1 more | 15.97% | 846.0K | 13D | Mar 23, 2026 ↗ |
| Weber Capital Management, LLC | 7.26% | 13G | May 8, 2025 ↗ | |
| Leviticus Partners LP | 6.50% | 293.7K | 13G | May 14, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| James W. Green | director | 245.3K | 5.44% | Aug 19, 2025 |
| John D. Duke | director, officer: Chief Executive Officer | 180.0K | 3.99% | Mar 23, 2026 |
| Katherine A. Eade | director | 58.7K | 1.30% | Jun 12, 2026 |
| William Snider | director | 48.6K | 1.08% | Jun 11, 2026 |
| Mark T. Frost | officer: Chief Financial Officer | 47.5K | 1.05% | Apr 1, 2026 |
| Stephen J. Denelsky | director | 37.6K | 0.83% | Jun 11, 2026 |
| Seth Benjamin Benson | director | 27.6K | 0.61% | Jun 11, 2026 |
| Robert E. Gagnon | director | 27.6K | 0.61% | Jun 11, 2026 |
| Jennifer Cote | officer: Chief Financial Officer | 15.9K | 0.35% | Mar 21, 2025 |
3 ten-percent owners hold 795.8K shares by Form 4, outside the officers-and-directors figure above · 20 people have not refiled in the last 18 months (489.9K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Mar 16, 2026 | Mark T. Frostofficer: Chief Financial Officer | Purchase | 5,000 | $5.00 | 17,500 |
| Mar 16, 2026 | William Sniderdirector | Purchase | 12,525 | $4.99 | 23,525 |
| Mar 17, 2026 | William Sniderdirector | Purchase | 8,475 | $4.85 | 32,000 |
| Mar 17, 2026 | Stephen J. Denelskydirector | Purchase | 10,000 | $4.87 | 21,000 |
| Mar 16, 2026 | John D. Dukedirector, officer: Chief Executive Officer | Purchase | 5,000 | $5.01 | 105,000 |
CongressHouse and Senate disclosures
Not reported.