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Company

Amplitude, Inc.

AMPL · CIK 0001866692

SEC FORM 4
$0.00

Amplitude, Inc. (AMPL)

Acquisition (code C) of 185,000 shares at $0 per share.

Reporting Person Skates Spenser · Officer Title CEO and President · Transaction Code C

Traded Sep 10, 2026 · Disclosed Sep 14, 2026

Source: SEC Form 4 · 0001866692-26-000018 · filed 2026-09-14 · View filing →

SEC FORM 4
$2,275,611.00

Amplitude, Inc. (AMPL)

Sale of 185,000 shares at $12.3006 per share.

Reporting Person Skates Spenser · Officer Title CEO and President · Transaction Code S

Traded Sep 10, 2026 · Disclosed Sep 14, 2026

Source: SEC Form 4 · 0001866692-26-000018 · filed 2026-09-14 · View filing →

SEC FORM 4
$3,897,750.00

Amplitude, Inc. (AMPL)

Sale of 300,000 shares at $12.9925 per share.

Reporting Person Crook Nathaniel Glenn · Officer Title Chief Commercial Officer · Transaction Code S

Traded Sep 4, 2026 · Disclosed Sep 9, 2026

Source: SEC Form 4 · 0001866692-26-000015 · filed 2026-09-09 · View filing →

SEC FORM 4
$948,766.42

Amplitude, Inc. (AMPL)

Disposition (code F) of 72,814 shares at $13.03 per share.

Reporting Person Casey Andrew · Officer Title Chief Financial Officer · Transaction Code F

Traded Aug 17, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001866692-26-000010 · filed 2026-08-18 · View filing →

SEC FORM 4
$1,425,065.04

Amplitude, Inc. (AMPL)

Disposition (code F) of 109,368 shares at $13.03 per share.

Reporting Person Crook Nathaniel Glenn · Officer Title Chief Commercial Officer · Transaction Code F

Traded Aug 17, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001866692-26-000011 · filed 2026-08-18 · View filing →

SEC FORM 4
$682,368.07

Amplitude, Inc. (AMPL)

Disposition (code F) of 52,369 shares at $13.03 per share.

Reporting Person Skates Spenser · Officer Title CEO and President · Transaction Code F

Traded Aug 17, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001866692-26-000012 · filed 2026-08-18 · View filing →

SEC FORM 4
$702,030.34

Amplitude, Inc. (AMPL)

Disposition (code F) of 53,878 shares at $13.03 per share.

Reporting Person Liu Curtis · Officer Title Chief Technology Officer · Transaction Code F

Traded Aug 17, 2026 · Disclosed Aug 18, 2026

Source: SEC Form 4 · 0001866692-26-000013 · filed 2026-08-18 · View filing →