Insider · CIK 0001883022
Curtis Liu
Files at AMPL (Amplitude, Inc.). First filing Mar 9, 2026, latest Jun 16, 2026.
In brief
Curtis Liu files SEC Form 4 as officer, director and 10% owner at AMPL (Amplitude, Inc.). Since Mar 9, 2026, Curtis Liu has reported 0 open-market buys worth $0 and 5 open-market sells worth $1.0M, the latest filed on Jun 16, 2026.
A track record needs three past buys with six months of prices behind them; Curtis Liu has 0, so none is measured yet.
The newest scored trade: sold $183k of AMPL on Jun 1, 2026, filed Jun 16, 2026, scored 15 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 5 sells worth $1.0M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
AMPL: Amplitude, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 15Weak | Amplitude, Inc. | $183k 22,786 shares | -2% | +57% from low-34% from high | |
| 15Weak | Amplitude, Inc. | $178k 22,201 shares | -2% | +57% from low-34% from high | |
| 6Weak | Amplitude, Inc. | $143k 17,586 shares | -2% | +43% from low-40% from high | |
| 8Weak | Amplitude, Inc. | $266k 33,201 shares | -5% | +26% from low-41% from high | |
| 8Weak | Amplitude, Inc. | $241k 30,061 shares | -5% | +27% from low-41% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Jun 1, 2026 | AMPL AMPLITUDE INC. | 22,201 0.02% of outstanding | $174k | Jun 1, 2026 | $649k |
| Mar 5, 2026 | AMPL AMPLITUDE INC. | 80,848 0.08% of outstanding | $624k | Mar 5, 2026 | none |
Transactions
Every row this insider has filed, 19 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 17, 2026 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -53,878 | $13.03 | $702k | 950,316 | Aug 18, 2026 |
| Jul 8, 2026 | AMPL Amplitude, Inc. | GGift Class B Common Stockderivativeindirect: By Trust | -175,000 | $0.00 | $0 | 7,207,208 | Jul 10, 2026 |
| Jul 8, 2026 | AMPL Amplitude, Inc. | GGift Class B Common Stockderivativeindirect: By Spouse | +175,000 | $0.00 | $0 | 175,000 | Jul 10, 2026 |
| Jun 1, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -22,786 | $8.03 | $183k | 1,004,194 | Jun 16, 2026 |
| Jun 1, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -22,201 | $8.03 | $178k | 1,004,779 | Jun 3, 2026 |
| May 15, 2026 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -40,279 | $6.06 | $244k | 1,026,980 | May 19, 2026 |
| May 4, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -17,586 | $8.12 | $143k | 1,067,259 | May 6, 2026 |
| Apr 15, 2026 | AMPL Amplitude, Inc. | AGrant or award Class A Common Stock | +417,827 | $0.00 | $0 | 1,084,845 | Apr 17, 2026 |
| Mar 6, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -33,201 | $8.01 | $266k | 603,756 | Mar 10, 2026 |
| Mar 5, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -30,061 | $8.00 | $241k | 636,957 | Mar 9, 2026 |
| Feb 15, 2026 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -26,672 | $6.34 | $169k | 730,280 | Feb 17, 2026 |
| Nov 15, 2025 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -36,092 | $10.73 | $387k | 756,952 | Nov 18, 2025 |
| Aug 15, 2025 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -34,301 | $11.47 | $393k | 793,044 | Aug 19, 2025 |
| May 15, 2025 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -25,533 | $12.14 | $310k | 827,345 | May 19, 2025 |
| Apr 25, 2025 | AMPL Amplitude, Inc. | AGrant or award Class A Common Stock | +852,878 | $0.00 | $0 | 852,878 | Apr 29, 2025 |
| Feb 1, 2024 | AMPL Amplitude, Inc. | MOption exercise Class A Common Stock | +23,866 | $4.19 | $100k | 23,866 | Feb 5, 2024 |
| Feb 1, 2024 | AMPL Amplitude, Inc. | CConversion Class A Common Stock | -23,866 | $0.00 | $0 | 0 | Feb 5, 2024 |
| Feb 1, 2024 | AMPL Amplitude, Inc. | MOption exercise Stock Options (Right to buy)derivative | -23,866 | $0.00 | $0 | 12,199 | Feb 5, 2024 |
| Feb 1, 2024 | AMPL Amplitude, Inc. | CConversion Class B Common Stockderivative | +23,866 | $0.00 | $0 | 0 | Feb 5, 2024 |
Questions about Curtis Liu
Answered from the filings on this page, as of the latest one.
Is Curtis Liu buying or selling?
In the last 12 months Curtis Liu reported 0 open-market buys worth $0 and 5 open-market sells worth $1.0M on SEC Form 4; the latest was sold $183k of AMPL on Jun 1, 2026. Grants, option exercises and tax withholding are not counted.
How did Curtis Liu's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Curtis Liu has 0.
Where does Curtis Liu file Form 4?
Curtis Liu has filed Form 4 at AMPL (Amplitude, Inc.) as Chief Technology Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
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.