Thomas M Stepien
Insider
First SEC filing: May 12, 2025 · Latest: June 5, 2026
Insider at
Insider transactions
0 buys (P)
5 sells (S)
Net: $-1,338,459
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 25, 2026 | AMPX | G | 5,000 | · | · | 589,096 Direct | -0.84% | Disposed | (price as of 2026-10-02) |
| Aug. 25, 2026 | AMPX | G | 5,000 | · | · | 584,096 Direct | -0.85% | Disposed | (price as of 2026-10-02) |
| Aug. 25, 2026 | AMPX | G | 5,000 | · | · | 579,096 Direct | -0.86% | Disposed | (price as of 2026-10-02) |
| Aug. 25, 2026 | AMPX | G | 346 | · | · | 578,750 Direct | -0.06% | Disposed | (price as of 2026-10-02) |
| Aug. 25, 2026 | AMPX | A | 346 | · | · | 37,260 Indirect | +0.94% | Acquired | (price as of 2026-10-02) |
| Aug. 24, 2026 | AMPX | S | 8,000 | $10.03 | $80,240 | 594,096 Direct | -1.33% | Disposed | -3.6% (price as of 2026-10-02) |
| Aug. 21, 2026 | AMPX | S | 23,529 | $10.34 | $243,290 | 602,096 Direct | -3.76% | Disposed | -6.5% (price as of 2026-10-02) |
| June 4, 2026 | AMPX | G | 30,384 | · | · | 664,539 Direct | -4.37% | Disposed | (price as of 2026-10-02) |
| June 4, 2026 | AMPX | G | 36,914 | · | · | 627,625 Direct | -5.55% | Disposed | (price as of 2026-10-02) |
| June 4, 2026 | AMPX | G | 36,914 | · | · | 36,914 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 4, 2026 | AMPX | S | 2,000 | $20.97 | $41,940 | 625,625 Direct | -0.32% | Disposed | -53.9% (price as of 2026-10-02) |
| May 27, 2026 | AMPX | S | 4,375 | $17.19 | $75,206 | 694,923 Direct | -0.63% | Disposed | -43.7% (price as of 2026-10-02) |
| May 21, 2026 | AMPX | S | 60,702 | $14.79 | $897,783 | 699,298 Direct | -7.99% | Disposed | -34.6% (price as of 2026-10-02) |
| March 4, 2026 | AMPX | A | 150,000 | · | · | 760,000 Direct | +24.59% | Acquired | (price as of 2026-10-02) |
| Dec. 19, 2025 | AMPX | A | 200,000 | · | · | 760,000 Direct | +35.71% | Acquired | (price as of 2026-10-02) |
| Dec. 19, 2025 | AMPX | A | 200,000 | · | · | 610,000 Direct | +48.78% | Acquired | (price as of 2026-10-02) |
| May 1, 2025 | AMPX | A | 400,000 | · | · | 400,000 Direct | · | Acquired | (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| May 12, 2025 | AMPX | Common stock | · | Direct |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $319,712 | $238,292 | $2,746,000 | · | · | · | $50,711 | $3,354,715 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.