Form 4 Tracker
Amplitude, Inc.
AMPL

38 insider filings · Latest: Oct 15, 2026

Common Stock Transactions
Txn DateAcceptedInsiderTypeSharesAvg PriceValueShares OwnedFiling
Oct 2, 2026Oct 6 8:17 PMSkates SpenserDirector, CEO and President, 10% Owner
Sale
70,087$14.52$1.0M0(I)

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Oct 1, 2026Oct 2 10:44 PMSkates SpenserDirector, CEO and President, 10% Owner
Sale
3,539$14.45$51.1K0(I)

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Sep 30, 2026Oct 2 10:44 PMSkates SpenserDirector, CEO and President, 10% Owner
Sale
1,374$14.45$19.9K0(I)

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Oct 2, 2026Oct 2 9:00 PMSkates Spenser
Proposed Sale
70,087$14.52$1.0M—

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Oct 1, 2026Oct 1 8:14 PMSkates Spenser
Proposed Sale
3,539$14.45$51.1K—

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Sep 30, 2026Sep 30 8:09 PMSkates Spenser
Proposed Sale
1,374$14.45$19.9K—

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Sep 10, 2026Sep 14 8:59 PMSkates SpenserDirector, CEO and President, 10% Owner
Sale
185,000$12.30$2.3M0(I)

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Sep 10, 2026Sep 10 8:35 PMSkates Spenser
Proposed Sale
185,000$12.30$2.3M—

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Sep 4, 2026Sep 9 9:03 PMNathaniel Glenn CrookChief Commercial Officer
Sale
300,000$12.99$3.9M1,622,696(D)

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Sep 4, 2026Sep 4 8:37 PMCrook Nathaniel Glenn
Proposed Sale
300,000$12.99$3.9M—

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Jun 1, 2026Jun 16 9:15 PMLiu CurtisDirector, Chief Technology Officer, 10% Owner
Sale
22,786$8.03$182.9K1,004,194(D)

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Jun 12, 2026Jun 15 8:26 PMCatherine WongDirector
Sale
7,453$6.79$50.6K111,462(D)

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Jun 12, 2026Jun 12 8:47 PMCATHERINE JEN WONG
Proposed Sale
7,453$6.88$51.3K—

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Jun 1, 2026Jun 12 8:29 PMLiu Curtis
Proposed Sale
22,786$7.82$178.2K—

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Jun 1, 2026Jun 3 9:17 PMLiu CurtisDirector, Chief Technology Officer, 10% Owner
Sale
22,201$8.03$178.2K1,004,779(D)

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Jun 1, 2026Jun 1 8:18 PMCURTIS LIU
Proposed Sale
22,201$7.82$173.6K—

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May 4, 2026May 6 8:52 PMLiu CurtisDirector, Chief Technology Officer, 10% Owner
Sale
17,586$8.12$142.9K1,067,259(D)

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Mar 6, 2026Mar 10 8:54 PMLiu CurtisDirector, Chief Technology Officer, 10% Owner
Sale
33,201$8.01$265.8K603,756(D)

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Mar 5, 2026Mar 9 8:44 PMLiu CurtisDirector, Chief Technology Officer, 10% Owner
Sale
30,061$8.00$240.5K636,957(D)

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Mar 5, 2026Mar 5 9:32 PMCURTIS LIU
Proposed Sale
80,848$7.72$624.1K—

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Stock Options & Derivatives
Txn DateAcceptedInsiderTypeSharesExercise PriceShares OwnedFiling
Oct 2, 2026Oct 6 8:17 PMSkates SpenserDirector, CEO and President, 10% Owner
Conversion
70,087—307,157(I)

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Oct 1, 2026Oct 2 10:44 PMSkates SpenserDirector, CEO and President, 10% Owner
Conversion
3,539—377,244(I)

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Sep 30, 2026Oct 2 10:44 PMSkates SpenserDirector, CEO and President, 10% Owner
Conversion
1,374—380,783(I)

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Sep 10, 2026Sep 14 8:59 PMSkates SpenserDirector, CEO and President, 10% Owner
Conversion
185,000—382,157(I)

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Jul 8, 2026Jul 10 8:13 PMLiu CurtisDirector, Chief Technology Officer, 10% Owner
Gift
175,000—175,000(I)

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Jul 8, 2026Jul 10 8:13 PMLiu CurtisDirector, Chief Technology Officer, 10% Owner
Gift
175,000—7,207,208(I)

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