John D. Duke
CIK: 0002071593
Transaction Breakdown
Open Market Buys (P)1 (25.0%)
High conviction signal
Open Market Sales (S)0 (0.0%)
Position reduction
Option Exercises (M)0 (0.0%)
Derivative conversions
Awards (A)3 (75.0%)
Compensation grants
Other (G, F, J, C, D, …)0 (0.0%)
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
HBIO
HARVARD BIOSCIENCE INC
DirectorOfficer
Discretionary Trading P&L
Holdings
Transaction History (4 total)
- Mar 20, 2026HBIO
HARVARD BIOSCIENCE INC
Award(A)Direct75K shares- - Mar 16, 2026HBIO
HARVARD BIOSCIENCE INC
Purchase(P)Direct5K shares at avg. $5.01$25K - Aug 8, 2025HBIO
HARVARD BIOSCIENCE INC
Award(A)Direct500K shares- - Aug 8, 2025HBIO
HARVARD BIOSCIENCE INC
Award(A)Direct500K shares-
1-4 of 4 transactions
About Duke John D
Duke John D (SEC CIK 0002071593) files insider reports with the SEC as Chief Executive Officer of HARVARD BIOSCIENCE INC (HBIO).
Signal8 holds 4 ownership filings by Duke John D (1 Form 3, 3 Form 4), filed between Jun 9, 2025 and Mar 23, 2026. Those filings report 4 transactions, from Aug 8, 2025 to Mar 20, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Duke John D's filings is in HOLLISTON, MA.
Recent filings by Duke John D
Other insiders filing for HARVARD BIOSCIENCE INC (HBIO)
- Eade Katherine A., Director
- Snider William, Director
- DENELSKY STEPHEN J, Director
- Gagnon Robert E., Director
- Benson Seth Benjamin, Director
- Frost Mark T, Chief Financial Officer