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Insider ActivityAMPX
Stefan Constantin Ionel, Chief Technology Officer at Amprius Technologies, Inc., sold $55K of AMPX
Updated Jun 10, 2026
Stefan Constantin Ionel
Chief Technology Officer
Amprius Technologies, Inc. ·
$AMPX
Transaction Details
| Insider | Stefan Constantin Ionel |
|---|---|
| Title | Chief Technology Officer |
| Company | Amprius Technologies, Inc. |
| Ticker | AMPX |
| Transaction Type | Sale |
| Transaction Date | 2026-05-27 |
| Shares Traded | 3,208 |
| Price Per Share | $17.1935 |
| Total Value | $55K |
| Filed Date | 2026-05-28 |
| Accession Number | 0001940928-26-000020 |
Ownership Context
| Shares Owned After Transaction | 801,310 |
|---|---|
| Ownership Type | Direct |
SEC Filing
Accession: 0001940928-26-000020
Other Insider Trades — AMPX
| Insider | Title | Action | Value | Date |
|---|---|---|---|---|
| Stepien Thomas M | Chief Executive Officer, Director | sold | $42K | 2026-06-04 |
| Stepien Thomas M | Chief Executive Officer, Director | traded | — | 2026-06-04 |
| Stepien Thomas M | Chief Executive Officer, Director | traded | — | 2026-06-04 |
| Sun Kang | Director | sold | $6K | 2026-05-27 |
| Stepien Thomas M | Chief Executive Officer, Director | sold | $75K | 2026-05-27 |
| DIXON DONALD R | Director | sold | $320K | 2026-05-26 |
| Stefan Constantin Ionel | Chief Technology Officer | sold | $426K | 2026-05-21 |
| Stepien Thomas M | Chief Executive Officer, Director | sold | $898K | 2026-05-21 |
| Sun Kang | Director | sold | $1.0M | 2026-05-21 |
| Sun Kang | Director | traded | — | 2026-05-05 |
Other Trades by Stefan Constantin Ionel
| Ticker | Company | Action | Value | Date |
|---|---|---|---|---|
| AMPX | Amprius Technologies, Inc. | sold | $426K | 2026-05-21 |
Full Ticker Profile
View all insider trades, dark pool activity, congressional filings, and the Whisper Score for AMPX — Amprius Technologies, Inc. →
Whisper Score — AMPX
21.87
Murmurs
Current Whisper Score
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Data sourced from SEC Form 4 insider trading filings. Transaction details are as reported to the Securities and Exchange Commission. This page does not constitute financial advice. StonkWhisper presents public records — it does not verify or guarantee the accuracy of SEC filings.
Last updated: June 10, 2026 at 07:06 UTC