Curtis Liu is CTO & 10% Owner at Amplitude, Inc. (AMPL). They have made 1 open-market trade across 1 company since 2021, most recently 2026-08-17.
CIK 0001883022
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AMPL | 950,316 | $14.0M |
Shares reported on the most recent Form 4, priced at the 2026-08-18 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| AMPL | SELL · 10b5-1 | 2026-06-01 | 2026-06-16 | $8.03 | $183K | +13.2% | +44.4% | +104.3% |
| AMPL | SELL · 10b5-1 | 2026-06-01 | 2026-06-03 | $8.03 | $178K | -17.6% | +6.9% | +66.1% |
| AMPL | SELL · 10b5-1 | 2026-05-04 | 2026-05-06 | $8.12 | $143K | +5.4% | +27.1% | +63.8% |
| AMPL | SELL · 10b5-1 | 2026-03-06 | 2026-03-10 | $8.01 | $266K | -9.2% | -22.0% | -7.1% |
| AMPL | SELL · 10b5-1 | 2026-03-05 | 2026-03-09 | $8.00 | $240K | -7.6% | -19.8% | -8.3% |
| AMPL | SELL | 2021-09-28 | 2021-09-30 | $50.58 | $22.4M | -7.4% | +44.3% | +0.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.