| Insider | Role | Shares | Value | Buys | Sells |
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| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
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| Insider | Role | Shares | Value | Buys | Sells |
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| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
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President of Amprius Lab
1 company
Jonathan Bornstein last filed a Form 4 in March 2025, as President of Amprius Lab at AMPX. Jonathan Bornstein's net worth is not public. Form 4 filings only show shares in the companies where this person was an insider, as of the last filing.
Our model assigns Jonathan Bornstein a strong insider score of 71/100, based on 23 past trades. Over a 12-month horizon, 69.6% of those trades were profitable, with an average 12-month return of +11.2%.
At the last filing, the largest reported position was 422,668 shares of AMPX. The AMPX filings lean toward selling, a net 1,394,762 shares.
Jonathan Bornstein has 18 Form 4 filings on record from September 2022 to March 2025, all as President of Amprius Lab at Amprius Technologies (AMPX), 2022–2025.
The 49 reported transactions were 25 open-market sales, 19 option exercises, 4 option or other derivative awards and 1 stock award.
Counted by filing, the open-market trades come to no purchases and 13 sales worth about $4.8M.
The largest open-market sale was 150,000 shares of AMPX at an average $4.44 on January 2, 2024, about $666K. Twelve months later AMPX was down 29%.
9 of the 13 sales since April 2023 were made under a Rule 10b5-1 trading plan; the other 4 were not.
Shares as reported in the last Form 4 for each company; the most recent is from March 2025. Values use today's prices. Any trades after the last filing were not reported, so current holdings may differ.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Feb 21, 2025 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sell | 13,527 | $3.13 | $42,382.80 | -3.1% | -16.0% | +217.3% | |
| Nov 21, 2024 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sell | 166,706 | $1.93 | $322,015.99 | -26.9% | +69.7% | +410.6% | |
| Aug 21, 2024 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sell | 18,644 | $1.04 | $19,389.76 | -1.2% | +91.7% | +528.7% | |
| May 22, 2024 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sell | 19,902 | $1.34 | $26,669.86 | -1.3% | -26.7% | +72.6% | |
| Apr 2, 2024 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sale+OE10b5-1 | 125,983 | $2.38 | $299,612.77 | -18.4% | -47.9% | +16.0% | |
| Mar 6, 2024 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sale+OE10b5-1 | 150,000 | $2.88 | $432,041.40 | - | -51.5% | -26.8% | |
| Feb 6, 2024 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sale+OE10b5-1 | 150,000 | $4.43 | $663,810.00 | - | -48.8% | -30.8% | |
| Jan 2, 2024 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sale+OE10b5-1 | 150,000 | $4.44 | $666,260.08 | - | -35.3% | -28.5% | |
| Dec 7, 2023 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sale+OE10b5-1 | 150,000 | $4.05 | $608,077.11 | - | -29.5% | -46.9% | |
| Nov 20, 2023 | AMPX Amprius Technologies, Inc. | President of Amprius Lab | Sale+OE10b5-1 | 27,631 | $3.84 | $106,105.80 | - | +3.4% | -45.5% |