Nathaniel Glenn Crook sold $3.9M of AMPL
Chief Commercial Officer at Amplitude, Inc.. 300,000 shares at an average of $12.99, traded Sep 4, 2026, filed Sep 9, 2026.
Score components
- +15RoleOfficer
- +25Trade size$3.9M at market
- +5Share of holdings soldSold 16% of holdings
- +8Cluster2 insiders selling within 14 days
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001866692-26-000015, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 4, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -300,000 | $12.99 | $3.9M | 1,622,696 | 34 d ago |
Related signals
Other insiders at Amplitude, Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 50Moderate | Amplitude, Inc. | Spenser Skates CEO and President | $1.0M 70,087 shares | -100% | |
| 33Weak | Amplitude, Inc. | Spenser Skates CEO and President | $71k 4,913 shares | -358% | |
| 58Moderate | Amplitude, Inc. | Spenser Skates CEO and President | $2.3M 185,000 shares | -100% | |
| 15Weak | Amplitude, Inc. | Curtis Liu Chief Technology Officer | $183k 22,786 shares | -2% | |
| 10Weak | Amplitude, Inc. | Catherine Wong director | $51k 7,453 shares | -6% | |
| 15Weak | Amplitude, Inc. | Curtis Liu Chief Technology Officer | $178k 22,201 shares | -2% | |
| 6Weak | Amplitude, Inc. | Curtis Liu Chief Technology Officer | $143k 17,586 shares | -2% | |
| 8Weak | Amplitude, Inc. | Curtis Liu Chief Technology Officer | $266k 33,201 shares | -5% | |
| 8Weak | Amplitude, Inc. | Curtis Liu Chief Technology Officer | $241k 30,061 shares | -5% | |
| 33Weak | Amplitude, Inc. | Spenser Skates Chief Executive Officer | $1,200 100 shares | -100% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.