Curtis Liu

Insider Reports History

Reporting-owner location: San Francisco, CA
Latest reporting-owner signature: /s/ Elizabeth Fisher, as attorney in fact for Curtis Liu
Source: Latest parsed Forms 3/4/5 signature
Transaction source note: Rows are grouped by transaction date from the original SEC filing. Open the aggregated insider activity page to review issuer-level activity across dates.

Reported holdings for Curtis Liu

Form 4 holding Chief Technology Officer, Director, 10%+ Owner

Amplitude, Inc.

Security class: Class A Common Stock
Shares / value: 950,316
Estimated value: $7,269,917
Report date: 17 Aug 2026
Price: $7.65
Ownership: Direct

Form 4 holding Chief Technology Officer, Director, 10%+ Owner

Amplitude, Inc.

Security class: Class B Common Stock
Shares / value: 7,207,208
Estimated value
Report date: 08 Jul 2026
Price
Ownership: By Trust
Underlying class: Class A Common Stock
Underlying amount

Form 4 holding Chief Technology Officer, Director, 10%+ Owner

Amplitude, Inc.

Security class: Class B Common Stock
Shares / value: 175,000
Estimated value
Report date: 08 Jul 2026
Price
Ownership: By Spouse
Underlying class: Class A Common Stock
Underlying amount

Insider Reports Filed by Curtis Liu

4 AMPL

Amplitude, Inc.

Report period: 17 Aug 2026
Transactions: 1
Transaction value: $0
Accepted by SEC: 18 Aug 2026, 17:19
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 08 Jul 2026
Transactions: 2
Transaction value: $0
Accepted by SEC: 10 Jul 2026, 16:13
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4/A AMPL

Amplitude, Inc.

Report period: 01 Jun 2026
Transactions: 1
Transaction value: -$182,878
Accepted by SEC: 16 Jun 2026, 17:15
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 15 May 2026
Transactions: 1
Transaction value: $0
Accepted by SEC: 19 May 2026, 16:28
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 04 May 2026
Transactions: 1
Transaction value: -$142,877
Accepted by SEC: 06 May 2026, 16:52
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 15 Apr 2026
Transactions: 1
Transaction value: $0
Accepted by SEC: 17 Apr 2026, 17:55
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 06 Mar 2026
Transactions: 1
Transaction value: -$265,840
Accepted by SEC: 10 Mar 2026, 16:54
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 05 Mar 2026
Transactions: 1
Transaction value: -$240,539
Accepted by SEC: 09 Mar 2026, 16:44
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 15 Feb 2026
Transactions: 1
Transaction value: -$169,100
Accepted by SEC: 17 Feb 2026, 16:34
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 15 Nov 2025
Transactions: 1
Transaction value: -$387,267
Accepted by SEC: 18 Nov 2025, 17:18
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 15 Aug 2025
Transactions: 1
Transaction value: -$393,432
Accepted by SEC: 19 Aug 2025, 17:44
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 15 May 2025
Transactions: 1
Transaction value: -$309,971
Accepted by SEC: 19 May 2025, 17:22
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 25 Apr 2025
Transactions: 1
Transaction value: $0
Accepted by SEC: 29 Apr 2025, 16:59
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 01 Feb 2024
Transactions: 4
Transaction value: +$99,999
Accepted by SEC: 05 Feb 2024, 17:12
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 01 Feb 2023
Transactions: 4
Transaction value: +$99,999
Accepted by SEC: 03 Feb 2023, 17:28
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 17 Feb 2022
Transactions: 8
Transaction value: +$393,299
Accepted by SEC: 23 Feb 2022, 17:14
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 28 Sep 2021
Transactions: 2
Transaction value: -$15,167,820
Accepted by SEC: 30 Sep 2021, 19:32
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

3 AMPL

Amplitude, Inc.

Report period: 21 Sep 2021
Transactions: 0
Transaction value: $0
Accepted by SEC: 21 Sep 2021, 18:00
Role: Director
Next action: Open filing details

4 AMPL

Amplitude, Inc.

Report period: 24 Jun 2021
Transactions: 9
Transaction value: $0
Accepted by SEC: 23 Sep 2021, 21:30
Role: Chief Technology Officer, Director, 10%+ Owner
Next action: Open filing details

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