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.
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Eos Energy Enterprises Inc. June 3, 202696.7%
-
Eos Energy Enterprises Inc. May 16, 202393.1%
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Kalaris Therapeutics Inc. May 11, 202381.2%
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 | — | — |
| May 19, 2026 | Eos Energy Enterprises Inc. | Sold back to the company | −12,326 | $6.88 | $84,803 |
| Dec 5, 2025 | Eos Energy Enterprises Inc. | Open-market sale | −32,328 | $15.05 | $486,536 |
| Dec 4, 2025 | Eos Energy Enterprises Inc. | Open-market sale | −8,000 | $15.75 | $126,000 |
| May 14, 2025 | Eos Energy Enterprises Inc. | Option exercise | +105,263 | — | — |
| May 14, 2025 | Eos Energy Enterprises Inc. | Sold back to the company | −42,105 | $6.94 | $292,209 |
| Sep 12, 2024 | Eos Energy Enterprises Inc. | Open-market sale | −132,720 | $2.63 | $349,054 |
| Sep 12, 2024 | Eos Energy Enterprises Inc. | Open-market sale | −30,000 | $2.62 | $78,600 |
| Jun 6, 2024 | Kalaris Therapeutics Inc. | Grant or award | +35,000 | — | — |
| Apr 30, 2024 | Eos Energy Enterprises Inc. | Option exercise | +32,328 | — | — |
| May 15, 2023 | Eos Energy Enterprises Inc. | Option exercise | +52,601 | — | — |
| May 11, 2023 | Kalaris Therapeutics Inc. | Grant or award | +35,000 | — | — |
Questions about Jeffrey S. Bornstein
What boards is Jeffrey S. Bornstein on?
Jeffrey S. Bornstein sits on the boards of Eos Energy Enterprises Inc. and Kalaris Therapeutics Inc.
How long has Jeffrey S. Bornstein served on boards?
Our records show at least 7 years of board service across 2 boards, the earliest from 2023.
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