Duke John D has filed 4 insider transactions across 1 company since August 2025.
Most recent transaction: a grant/award of 75000 shares of HARVARD BIOSCIENCE INC ($HBIO) on March 20, 2026.
Activity breakdown: 1 open-market purchase and 0 sales.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 20, 2026 | HARVARD BIOSCIENCE INC | $HBIO | Duke John D | Chief Executive Officer | A | Common Stock | 75000 | $0.00 | 180,000.0000 | 44,579,665 | 71.43% | 0.17% |
| March 16, 2026 | HARVARD BIOSCIENCE INC | $HBIO | Duke John D | Chief Executive Officer | P | Common Stock | 5000 | $5.01 | 105,000.0000 | 44,579,665 | 5.00% | 0.01% |
| Aug. 8, 2025 | HARVARD BIOSCIENCE INC | $HBIO | Duke John D | Chief Executive Officer | A | Common Stock | 500000 | $0.00 | 500,000.0000 | 44,074,475 | 9999.99% | 1.13% |
| Aug. 8, 2025 | HARVARD BIOSCIENCE INC | $HBIO | Duke John D | Chief Executive Officer | A | Common Stock | 500000 | $0.00 | 1,000,000.0000 | 44,074,475 | 100.00% | 1.13% |