Spenser Skates sold $513k of AMPL
Chief Executive Officer at Amplitude, Inc.. 42,743 shares at an average of $12.01, traded Dec 24, 2025, filed Dec 29, 2025.
Score components
- +25RoleCEO
- +18Trade size$513k at market
- +20Share of holdings soldSold 100% 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.
This signal so far: 1m -16.3%, 3m -42.5%, 6m -36.1%.
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 0001882913-25-000005, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 24, 2025 | CConversion Class A Common Stockindirect: By Spouse10b5-1 | +42,743 | $0.00 | $0 | 42,743 | Dec 29, 2025 |
| Dec 24, 2025 | SOpen-market sale Class A Common Stockindirect: By Spouse10b5-1 | -42,743 | $12.01 | $513k | 0 | Dec 29, 2025 |
| Dec 24, 2025 | CConversion Class B Common Stockderivativeindirect: By Spouse10b5-1 | -42,743 | $0.00 | $0 | 567,257 | Dec 29, 2025 |
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% | |
| 33Weak | Amplitude, Inc. | Nathaniel Glenn Crook Chief Commercial Officer | $3.9M 300,000 shares | -16% | |
| 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% |
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.