Company · CIK 0001866692 · SIC 7372 — Services-Prepackaged Software · Nasdaq

Amplitude, Inc. · AMPL

Insider activity reported against this company. All insider holders · On EDGAR ↗

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $0 · 0sales $6.2M · 2net −$6.2M

Reported at this company — common stock

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 10, 2026 SForm 4 →	Sep 14, 4:59 pm EDT	Spenser SkatesCEO and President, Director, 10% Owner	185,000	$12.30	$2,275,611	0	−100%	10b5-1
Sep 10, 2026 CForm 4 →	Sep 14, 4:59 pm EDT	Spenser SkatesCEO and President, Director, 10% Owner	185,000	—	—	185,000	—	10b5-1
Sep 4, 2026 SForm 4 →	Sep 9, 5:03 pm EDT	Nathaniel Glenn CrookChief Commercial Officer	300,000	$12.99	$3,897,750	1,622,696	−15.6%	10b5-1
Aug 17, 2026 FForm 4 →	Aug 18, 5:19 pm EDT	Curtis LiuChief Technology Officer, Director, 10% Owner	53,878	$13.03	$702,030	950,316	—
Aug 17, 2026 FForm 4 →	Aug 18, 5:18 pm EDT	Spenser SkatesCEO and President, Director, 10% Owner	52,369	$13.03	$682,368	1,231,188	—
Aug 17, 2026 FForm 4 →	Aug 18, 5:16 pm EDT	Nathaniel Glenn CrookChief Commercial Officer	109,368	$13.03	$1,425,065	1,922,696	—
Aug 17, 2026 FForm 4 →	Aug 18, 5:14 pm EDT	Andrew CaseyChief Financial Officer	72,814	$13.03	$948,766	1,363,338	—
Jul 5, 2026 AForm 4 →	Jul 7, 6:19 pm EDT	Tien TzuoDirector	1,521	—	—	101,601	—
Jul 5, 2026 AForm 4 →	Jul 7, 6:18 pm EDT	Erica SchultzDirector	1,659	—	—	143,100	—

Trade	Reported (ET)	Insider	Shares	Avg price	Total	Owned after	Δ stake	Flags
Sep 10, 2026 CForm 4 →	Sep 14, 4:59 pm EDT	Spenser SkatesCEO and President, Director, 10% Owner	185,000	—	—	382,157	—	10b5-1
Jul 8, 2026 GForm 4 →	Jul 10, 4:13 pm EDT	Curtis LiuChief Technology Officer, Director, 10% Owner	350,000	—	—	175,000	—