Latest filingAug 18, 2026Most recent Form 4
AMPL
Amplitude, Inc.
NasdaqTechnologyServices-Prepackaged Software
Insider activity for last month from 08/09 to 09/09. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$00 sells
Net open-market+$04 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period4transactions
- F · Tax withholding · dominant4 · 100%
Activity by reported role
A joint filing can contribute to multiple roles5transactions
- CCO · dominant1 · 20%
- Chief executive officer1 · 20%
- Chief financial officer1 · 20%
- CTO1 · 20%
- PRES1 · 20%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (4)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeCasey AndrewClass A Common Stock · Direct
1,363,338Aug 17, 2026
Crook Nathaniel GlennClass A Common Stock · Direct
1,922,696Aug 17, 2026
Skates SpenserClass A Common Stock · Direct
1,231,188Aug 17, 2026
Liu CurtisClass A Common Stock · Direct
950,316Aug 17, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 09 → Sep 09
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Top insiders
By absolute net value across the selected period- CG-$1.4M
- CA-$948.8k
- LC-$702.0k
- SS-$682.4k
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
AMPL transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| AMPL | Liu Curtis | CTO | withholding | 53.8k | -$70.2M | F | +9.8% | 08/18 | 08/17 | |
| AMPL | Skates Spenser | CEOPRES | withholding | 52.3k | -$68.2M | F | +9.8% | 08/18 | 08/17 | |
| AMPL | Crook Nathaniel Glenn | CCO | withholding | 109k | -$142M | F | +9.8% | 08/18 | 08/17 | |
| AMPL | Casey Andrew | CFO | withholding | 72.8k | -$94.8M | F | +9.8% | 08/18 | 08/17 |
Amplitude, Inc. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Amplitude, Inc.?
Liu Curtis, Skates Spenser, Crook Nathaniel Glenn, Casey Andrew.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
No code-S sale is available for this period.
What is the recent purchase and sale balance?
No code-P purchases or code-S sales were reported in the selected period.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.