Steven Chu
CIK 1296381 · View on SEC EDGAR ↗
Insider
First SEC filing: Sept. 16, 2022 · Latest: Sept. 16, 2022
On this page
Insider at
Insider transactions
0 buys (P)
4 sells (S)
Net:
$-5,864,664
+ 13 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
13 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 12, 2026 | AMPX | S | 100,000 | $18.65 | $1,865,000 | 182,904 Direct | -35.35% | Disposed | -44.2% (price as of 2026-08-21) |
| March 12, 2026 | AMPX | S | 50,000 | $18.21 | $910,500 | 132,904 Direct | -27.34% | Disposed | -42.9% (price as of 2026-08-21) |
| March 12, 2026 | AMPX | S | 5,565 | $18.53 | $103,119 | 127,339 Direct | -4.19% | Disposed | -43.9% (price as of 2026-08-21) |
| March 10, 2026 | AMPX | S | 166,632 | $17.92 | $2,986,045 | 127,339 Direct | -56.68% | Disposed | -42.0% (price as of 2026-08-21) |
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.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| March 12, 2026 | AMPX | Stock Option (right to buy) | Common stock (86,143) | $2.61 | April 13, 2032 | 86,143 | Disposed |
| March 12, 2026 | AMPX | Stock Option (right to buy) | Common stock (69,422) | $0.62 | Dec. 12, 2027 | 69,422 | Disposed |
| March 10, 2026 | AMPX | Stock Option (right to buy) | Common stock (104,132) | $0.62 | Dec. 12, 2027 | 104,132 | Disposed |
| Sept. 14, 2022 | AMPX | Stock Option (right to buy) | Common Stock (270,251) | $2.61 | April 13, 2032 | 270,251 | Acquired |
| June 20, 2008 | NVDA | Director Stock Option (Right to Buy) | Common Stock (30,000) | $19.76 | June 19, 2014 | 30,000 | Acquired |
| June 22, 2007 | NVDA | Director Stock Option (Right to Buy) | Common Stock (24,000) | $43.62 | June 21, 2013 | 24,000 | Acquired |
| Aug. 1, 2006 | NVDA | Non-Qualified Stock Option (right to buy) | Common Stock (30,000) | $22.14 | July 31, 2012 | 30,000 | Acquired |
| Aug. 1, 2005 | NVDA | Non-Qualified Stock Option (right to buy) | Common Stock (25,000) | $27.06 | July 31, 2011 | 25,000 | Acquired |
| July 1, 2004 | NVDA | Director Stock Option (right to buy) | Common Stock (75,000) | $20.47 | June 30, 2010 | 75,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 2 holdings
Securities held when first becoming an insider, per SEC Form 3.