Jeffrey S. Bornstein

Sits on 2 boards. Last updated September 28, 2026

Time on boards

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

7 years of board service in total across 2 boards, counting each seat separately. Longest: Kalaris Therapeutics Inc., 3 years.

3 years ยท Since 2023
3 years ยท Since 2023

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
Jul 21, 2026 Eos Energy Enterprises Inc. Option exercise +9,558 $5.48 $52,378
May 19, 2026 Eos Energy Enterprises Inc. Option exercise +30,815 โ€” โ€”
May 19, 2026 Eos Energy Enterprises Inc. Sold back to the company โˆ’12,326 $6.88 $84,803
Dec 5, 2025 Eos Energy Enterprises Inc. Open-market sale โˆ’32,328 $15.05 $486,536
Dec 4, 2025 Eos Energy Enterprises Inc. Open-market sale โˆ’8,000 $15.75 $126,000
May 14, 2025 Eos Energy Enterprises Inc. Option exercise +105,263 โ€” โ€”
May 14, 2025 Eos Energy Enterprises Inc. Sold back to the company โˆ’42,105 $6.94 $292,209
Sep 12, 2024 Eos Energy Enterprises Inc. Open-market sale โˆ’132,720 $2.63 $349,054
Sep 12, 2024 Eos Energy Enterprises Inc. Open-market sale โˆ’30,000 $2.62 $78,600
Jun 6, 2024 Kalaris Therapeutics Inc. Grant or award +35,000 โ€” โ€”
Apr 30, 2024 Eos Energy Enterprises Inc. Option exercise +32,328 โ€” โ€”
May 15, 2023 Eos Energy Enterprises Inc. Option exercise +52,601 โ€” โ€”
May 11, 2023 Kalaris Therapeutics Inc. Grant or award +35,000 โ€” โ€”

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