Insider · CIK 0001882913
Spenser Skates
Files at AMPL (Amplitude, Inc.). First filing Nov 13, 2025, latest Oct 6, 2026.
In brief
Spenser Skates files SEC Form 4 as CEO, president, director and 10% owner at AMPL (Amplitude, Inc.). Since Nov 13, 2025, Spenser Skates has reported 0 open-market buys worth $0 and 6 open-market sells worth $8.3M, the latest filed on Oct 6, 2026.
A track record needs three past buys with six months of prices behind them; Spenser Skates has 0, so none is measured yet.
The newest scored trade: sold $1.0M of AMPL on Oct 2, 2026, filed Oct 6, 2026, scored 50 (moderate), under a 10b5-1 plan. In the last 12 months: 0 buys worth $0 and 6 sells worth $8.3M.
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 |
|---|---|---|---|---|---|
| 50Moderate | Amplitude, Inc. | $1.0M 70,087 shares | -100% | +159% from low0% from high | |
| 33Weak | Amplitude, Inc. | $71k 4,913 shares | -358% | +147% from low-3% from high | |
| 58Moderate | Amplitude, Inc. | $2.3M 185,000 shares | -100% | +122% from low-13% from high | |
| 33Weak | Amplitude, Inc. | $1,200 100 shares | -100% | +55% from low-17% from high | |
| 51Moderate | Amplitude, Inc. | $513k 42,743 shares | -100% | +55% from low-17% from high | |
| 58Moderate | Amplitude, Inc. | $4.4M 400,000 shares | -100% | +45% from low-23% 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 |
|---|---|---|---|---|---|
| Oct 2, 2026 | AMPL Amplitude, Inc. | 70,087 0.07% of outstanding | $1.0M | Oct 2, 2026 | $2.3M |
| Oct 1, 2026 | AMPL Amplitude, Inc. | 3,539 0.00% of outstanding | $51k | Oct 1, 2026 | $2.3M |
| Sep 30, 2026 | AMPL Amplitude, Inc. | 1,374 0.00% of outstanding | $20k | Sep 30, 2026 | $2.3M |
| Sep 10, 2026 | AMPL Amplitude, Inc. | 185,000 0.18% of outstanding | $2.3M | Sep 10, 2026 | none |
| Dec 29, 2025 | AMPL AMPLITUDE INC | 75,000 0.07% of outstanding | $871k | Dec 24, 2025 | $4.4M |
| Nov 12, 2025 | AMPL AMPLITUDE INC | 400,000 0.39% of outstanding | $4.3M | Nov 11, 2025 | none |
Transactions
Every row this insider has filed, 26 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | AMPL Amplitude, Inc. | CConversion Class A Common Stockindirect: By Spouse10b5-1 | +70,087 | $0.00 | $0 | 70,087 | 7 d ago |
| Oct 2, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stockindirect: By Spouse10b5-1 | -70,087 | $14.52 | $1.0M | 0 | 7 d ago |
| Oct 2, 2026 | AMPL Amplitude, Inc. | CConversion Class B Common Stockderivativeindirect: By Spouse10b5-1 | -70,087 | $0.00 | $0 | 307,157 | 7 d ago |
| Sep 30, 2026 | AMPL Amplitude, Inc. | CConversion Class A Common Stockindirect: By Spouse10b5-1 | +1,374 | $0.00 | $0 | 1,374 | 11 d ago |
| Sep 30, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stockindirect: By Spouse10b5-1 | -1,374 | $14.45 | $20k | 0 | 11 d ago |
| Oct 1, 2026 | AMPL Amplitude, Inc. | CConversion Class A Common Stockindirect: By Spouse10b5-1 | +3,539 | $0.00 | $0 | 3,539 | 11 d ago |
| Oct 1, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stockindirect: By Spouse10b5-1 | -3,539 | $14.45 | $51k | 0 | 11 d ago |
| Sep 30, 2026 | AMPL Amplitude, Inc. | CConversion Class B Common Stockderivativeindirect: By Spouse10b5-1 | -1,374 | $0.00 | $0 | 380,783 | 11 d ago |
| Oct 1, 2026 | AMPL Amplitude, Inc. | CConversion Class B Common Stockderivativeindirect: By Spouse10b5-1 | -3,539 | $0.00 | $0 | 377,244 | 11 d ago |
| Sep 10, 2026 | AMPL Amplitude, Inc. | CConversion Class A Common Stockindirect: By Spouse10b5-1 | +185,000 | $0.00 | $0 | 185,000 | 29 d ago |
| Sep 10, 2026 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stockindirect: By Spouse10b5-1 | -185,000 | $12.30 | $2.3M | 0 | 29 d ago |
| Sep 10, 2026 | AMPL Amplitude, Inc. | CConversion Class B Common Stockderivativeindirect: By Spouse10b5-1 | -185,000 | $0.00 | $0 | 382,157 | 29 d ago |
| Aug 17, 2026 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -52,369 | $13.03 | $682k | 1,231,188 | Aug 18, 2026 |
| May 15, 2026 | AMPL Amplitude, Inc. | FTax withholding Class A Common Stock | -39,562 | $6.06 | $240k | 1,283,557 | May 19, 2026 |
| Apr 21, 2026 | AMPL Amplitude, Inc. | AGrant or award Class A Common Stock | +1,323,119 | $0.00 | $0 | 1,323,119 | Apr 22, 2026 |
| Dec 26, 2025 | AMPL Amplitude, Inc. | CConversion Class A Common Stockindirect: By Spouse10b5-1 | +100 | $0.00 | $0 | 100 | Dec 30, 2025 |
| Dec 26, 2025 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stockindirect: By Spouse10b5-1 | -100 | $12.00 | $1,200 | 0 | Dec 30, 2025 |
| Dec 26, 2025 | AMPL Amplitude, Inc. | CConversion Class B Common Stockderivativeindirect: By Spouse10b5-1 | -100 | $0.00 | $0 | 567,157 | Dec 30, 2025 |
| Dec 24, 2025 | AMPL Amplitude, Inc. | CConversion Class A Common Stockindirect: By Spouse10b5-1 | +42,743 | $0.00 | $0 | 42,743 | Dec 29, 2025 |
| Dec 24, 2025 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stockindirect: By Spouse10b5-1 | -42,743 | $12.01 | $513k | 0 | Dec 29, 2025 |
| Dec 24, 2025 | AMPL Amplitude, Inc. | CConversion Class B Common Stockderivativeindirect: By Spouse10b5-1 | -42,743 | $0.00 | $0 | 567,257 | Dec 29, 2025 |
| Nov 11, 2025 | AMPL Amplitude, Inc. | CConversion Class A Common Stockindirect: By Spouse10b5-1 | +400,000 | $0.00 | $0 | 400,000 | Nov 13, 2025 |
| Nov 11, 2025 | AMPL Amplitude, Inc. | SOpen-market sale Class A Common Stockindirect: By Spouse10b5-1 | -400,000 | $10.99 | $4.4M | 0 | Nov 13, 2025 |
| Nov 11, 2025 | AMPL Amplitude, Inc. | CConversion Class B Common Stockderivativeindirect: By Spouse10b5-1 | -400,000 | $0.00 | $0 | 610,000 | Nov 13, 2025 |
| Aug 4, 2025 | AMPL Amplitude, Inc. | GGift Class B Common Stockderivative | -1,010,000 | $0.00 | $0 | 5,342,146 | Aug 6, 2025 |
| Aug 4, 2025 | AMPL Amplitude, Inc. | GGift Class B Common Stockderivativeindirect: By Spouse | +1,010,000 | $0.00 | $0 | 1,010,000 | Aug 6, 2025 |
Questions about Spenser Skates
Answered from the filings on this page, as of the latest one.
Is Spenser Skates buying or selling?
In the last 12 months Spenser Skates reported 0 open-market buys worth $0 and 6 open-market sells worth $8.3M on SEC Form 4; the latest was sold $1.0M of AMPL on Oct 2, 2026. Grants, option exercises and tax withholding are not counted.
How did Spenser Skates's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Spenser Skates has 0.
Where does Spenser Skates file Form 4?
Spenser Skates has filed Form 4 at AMPL (Amplitude, Inc.) as CEO and President. 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.