Insider · CIK 0002121274
Nathaniel Glenn Crook
Files at AMPL (Amplitude, Inc.). First filing Sep 9, 2026, latest Sep 9, 2026.
In brief
Nathaniel Glenn Crook files SEC Form 4 as officer at AMPL (Amplitude, Inc.). Since Sep 9, 2026, Nathaniel Glenn Crook has reported 0 open-market buys worth $0 and 1 open-market sell worth $3.9M, the latest filed on Sep 9, 2026.
A track record needs three past buys with six months of prices behind them; Nathaniel Glenn Crook has 0, so none is measured yet.
The newest scored trade: sold $3.9M of AMPL on Sep 4, 2026, filed Sep 9, 2026, scored 33 (weak), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 1 sell worth $3.9M.
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 |
|---|---|---|---|---|---|
| 33Weak | Amplitude, Inc. | $3.9M 300,000 shares | -16% | +132% from low-9% 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 |
|---|---|---|---|---|---|
| Sep 4, 2026 | AMPL Amplitude, Inc. | 300,000 0.30% of outstanding | $3.9M | Sep 4, 2026 | none |
Transactions
Every row this insider has filed, 5 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 4, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stock10b5-1 | -300,000 | $12.99 | $3.9M | 1,622,696 | 35 d ago |
| Aug 17, 2026 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -109,368 | $13.03 | $1.4M | 1,922,696 | Aug 18, 2026 |
| May 15, 2026 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -101,292 | $6.06 | $614k | 2,032,064 | May 19, 2026 |
| Apr 15, 2026 | AMPL Amplitude, Inc. | AGrant or award Class A Common Stock | +278,551 | $0.00 | $0 | 1,156,096 | Apr 17, 2026 |
| Apr 15, 2026 | AMPL Amplitude, Inc. | AGrant or award Class A Common Stock | +974,930 | $0.00 | $0 | 2,131,026 | Apr 17, 2026 |
Questions about Nathaniel Glenn Crook
Answered from the filings on this page, as of the latest one.
Is Nathaniel Glenn Crook buying or selling?
In the last 12 months Nathaniel Glenn Crook reported 0 open-market buys worth $0 and 1 open-market sell worth $3.9M on SEC Form 4; the latest was sold $3.9M of AMPL on Sep 4, 2026. Grants, option exercises and tax withholding are not counted.
How did Nathaniel Glenn Crook's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Nathaniel Glenn Crook has 0.
Where does Nathaniel Glenn Crook file Form 4?
Nathaniel Glenn Crook has filed Form 4 at AMPL (Amplitude, Inc.) as Chief Commercial 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.