Stepien Thomas M Insider Trading Activity
Stepien Thomas M has been net-selling over the last 12 months with 0 purchases and 3 sales across 1 company.
AMPX is the most-traded position with 3 trades. The largest single transaction was a sale of AMPX for $898K on May 21, 2026.
Performance Scorecard
Forward stock performance after each transaction by Stepien Thomas M. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | — | +4.5% | 100% | 1 |
| 90 days | — | +28.1% | 100% | 1 |
| 120 days | — | — | — | — |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersAMPX · Amprius Technologies, Inc.
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Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| AMPX | Amprius Technologies, Inc. | 3 | $1.2M |
Other insiders at Amprius Technologies, Inc.
3 other tracked filers at AMPX.