| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
| Insider | Role | Shares | Value | Buys | Sells |
|---|---|---|---|---|---|
| Date | Ticker | Insider | Role | Type | Shares | Price | Value | Chg% | SEC |
|---|---|---|---|---|---|---|---|---|---|
Chief Technology Officer
1 company
Constantin Ionel Stefan is Chief Technology Officer at AMPX. From December 2022 to August 2026, the filings on record show 0 open-market purchases and 15 sales. Constantin Ionel Stefan's net worth is not public. Form 4 filings only show shares in the companies where this person is an insider; those holdings are worth an estimated $6.8M at current prices.
Our model assigns Constantin Ionel Stefan a middling insider score of 52/100, based on 18 past trades. Over a 12-month horizon, 22.2% of those trades were profitable, with an average 12-month return of -50.4%.
The AMPX filings lean toward selling, a net 1,073,102 shares.
| Date | Ticker | Role | Type | Shares | Price | Value | Chg% | 3M | 12M | SEC |
|---|---|---|---|---|---|---|---|---|---|---|
| Feb 21, 2025 | AMPX Amprius Technologies, Inc. | Chief Technology Officer | Sell | 9,066 | $3.13 | $28,405.59 | -2.1% | -16.0% | +217.3% | |
| Nov 21, 2024 | AMPX Amprius Technologies, Inc. | Chief Technology Officer | Sell | 8,575 | $1.96 | $16,846.45 | -2.0% | +69.7% | +410.6% | |
| Aug 21, 2024 | AMPX Amprius Technologies, Inc. | Chief Technology Officer | Sell | 8,800 | $1.04 | $9,152.00 | -2.2% | +91.7% | +528.7% | |
| May 22, 2024 | AMPX Amprius Technologies, Inc. | Chief Technology Officer | Sell | 9,393 | $1.34 | $12,587.18 | -2.3% | -26.7% | +72.6% | |
| Sep 15, 2023 | AMPX Amprius Technologies, Inc. | Chief Technology Officer | Sell | 80,000 | $3.75 | $300,218.16 | -72.9% | -10.4% | -77.5% |