Samuel M. Zentman

Sits on 2 boards. Last updated September 28, 2026

Time on boards

Boards served
2
Current seats
2
Board service
5 years
Director since
2023

5 years of board service in total across 2 boards, counting each seat separately. Longest: Acorn Energy Inc., 3 years.

3 years · Since 2023
1 year · Since 2025

Shareholder support

Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Date Company Transaction Shares Price Value
Mar 4, 2026 Greenland Mines Ltd. Grant or award +350,000 — —
Feb 5, 2026 Acorn Energy Inc. Option exercise +625 $4.96 $3,100
Aug 5, 2025 Greenland Mines Ltd. Grant or award +153,494 — —
Nov 22, 2024 Acorn Energy Inc. Option exercise +625 $3.68 $2,300
Jan 1, 2024 Acorn Energy Inc. Option exercise +625 $2.88 $1,800
Jan 1, 2024 Acorn Energy Inc. Shares withheld for tax −296 $6.09 $1,803

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