Harvard Bioscience Inc (HBIO) Insider Ownership

Historic Insider Ownership Trends

As of April 28, 2026, Harvard Bioscience's top three insider holders are James W Green (Chief Executive Officer, 2.45Mn shares), Katherine A. Eade (Director, 421.13K shares), Alan I Edrick (Director, 273.91K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
James W Green Chief Executive Officer 2,452,566 0 19 Aug, 2025
Katherine A. Eade - 421,126 0 18 Jul, 2025
Alan I Edrick - 273,911 0 23 May, 2024
Michael A. Rossi Chief Financial Officer 260,540 0 03 Jan, 2023
John D Duke Chief Executive Officer 180,000 0 23 Mar, 2026
Jennifer Cote Chief Financial Officer 159,019 0 21 Mar, 2025
Kenneth Fletcher Olson Chief Operating Officer 155,595 0 30 Dec, 2021
Robert E. Gagnon Chief Financial Officer 110,000 0 18 Jul, 2025
Seth Benjamin Benson - 110,000 0 25 Jul, 2025
Mark T Frost Chief Financial Officer 47,500 0 01 Apr, 2026
William Snider - 32,000 0 18 Mar, 2026
Stephen J Denelsky - 21,000 0 18 Mar, 2026

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
16 Mar, 2026 Mark T Frost Common Stock A 5,000 $5.00 17,500 D P
20 Mar, 2026 Mark T Frost Common Stock A 30,000 $0.00 47,500 D A
20 Mar, 2026 John D Duke Common Stock A 75,000 $0.00 180,000 D A
16 Mar, 2026 William Snider Common Stock A 12,525 $4.99 23,525 D P
17 Mar, 2026 Stephen J Denelsky Common Stock A 10,000 $4.87 21,000 D P
17 Mar, 2026 William Snider Common Stock A 8,475 $4.85 32,000 D P
16 Mar, 2026 John D Duke Common Stock A 5,000 $5.01 105,000 D P
17 Dec, 2025 William Snider Common Stock A 110,000 $0.00 110,000 D A
05 Sep, 2025 Stephen J Denelsky Common Stock A 110,000 $0.00 110,000 D A
15 Aug, 2025 James W Green Common Stock D 49,048 $0.00 2,796,040 D D
15 Aug, 2025 James W Green Common Stock D 33,200 $0.53 2,762,840 D F
15 Aug, 2025 James W Green Common Stock D 119,332 $0.00 2,643,508 D D
15 Aug, 2025 James W Green Common Stock D 11,540 $0.53 2,631,968 D F
15 Aug, 2025 James W Green Common Stock D 66,036 $0.00 2,565,905 D D
15 Aug, 2025 James W Green Common Stock D 113,366 $0.00 2,452,566 D D
08 Aug, 2025 John D Duke Common Stock A 500,000 $0.00 500,000 D A
08 Aug, 2025 John D Duke Common Stock A 500,000 $0.00 1,000,000 D A
16 Jul, 2025 Seth Benjamin Benson Common Stock A 110,000 $0.00 110,000 D A
16 Jul, 2025 Katherine A. Eade Common Stock A 110,000 $0.00 421,126 D A
16 Jul, 2025 Robert E. Gagnon Common Stock A 110,000 $0.00 110,000 D A