John D. Duke

Companies

• Harvard BioscienceChief executive officer Aug 11, 2025 to now¹
• Harvard BioscienceBoard member Jun 9, 2025 to now²

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Harvard Bioscience HBIO180,000 shares³$1.5M at $8.31Mar 20, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Mar 20, 2026Granted 75,000 shares of Harvard Bioscience³
• Mar 16, 2026Bought 5,000 shares at $5.01 of Harvard Bioscience⁴
• Aug 8, 2025Granted 500,000 shares of Harvard Bioscience⁵
• Aug 8, 2025Granted 500,000 shares of Harvard Bioscience⁵