Follow the people · Insider
Curtis Liu
Curtis Liu files insider transactions with the SEC as a chief technology officer of Amplitude (AMPL). We hold 5 disclosed purchases and sales filed since 23 September 2021, 1 of them in the last 90 days.
- Files forAMPL
- Disclosed buys and sells5 in all, 1 in the last 90 days
- Last disclosure18 August 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 24 June 2021 — 17 August 2026Chief Technology Officer · Amplitude (AMPL)45 Form 4 lines · source: SEC Form 4
Everything they disclosed
45 entries, newest first — one per disclosure report, one per Form 4 line- had shares withheld for tax on 53,878 shares of AmplitudeSEC Form 418 August 2026Class A Common Stock · traded 17 August 2026 · filed 18 August 2026
- gave away 175,000 shares of Amplitude (a derivative holding)SEC Form 410 July 2026Class B Common Stock · traded 8 July 2026 · filed 10 July 2026
- gave away 175,000 shares of Amplitude (a derivative holding)SEC Form 410 July 2026Class B Common Stock · traded 8 July 2026 · filed 10 July 2026
- ▼ sold on the open market 22,786 shares of AmplitudeSEC Form 416 June 2026Class A Common Stock · traded 1 June 2026 · filed 16 June 2026
- ▼ sold on the open market 22,201 shares of AmplitudeSEC Form 43 June 2026Class A Common Stock · traded 1 June 2026 · filed 3 June 2026
- had shares withheld for tax on 40,279 shares of AmplitudeSEC Form 419 May 2026Class A Common Stock · traded 15 May 2026 · filed 19 May 2026
- ▼ sold on the open market 17,586 shares of AmplitudeSEC Form 46 May 2026Class A Common Stock · traded 4 May 2026 · filed 6 May 2026
- was granted 417,827 shares of AmplitudeSEC Form 417 April 2026Class A Common Stock · traded 15 April 2026 · filed 17 April 2026
- ▼ sold on the open market 33,201 shares of AmplitudeSEC Form 410 March 2026Class A Common Stock · traded 6 March 2026 · filed 10 March 2026
- ▼ sold on the open market 33,201 shares of AmplitudeSEC Form 410 March 2026Class A Common Stock · traded 6 March 2026 · filed 10 March 2026
- ▼ sold on the open market 30,061 shares of AmplitudeSEC Form 49 March 2026Class A Common Stock · traded 5 March 2026 · filed 9 March 2026
- ▼ sold on the open market 30,061 shares of AmplitudeSEC Form 49 March 2026Class A Common Stock · traded 5 March 2026 · filed 9 March 2026
- had shares withheld for tax on 26,672 shares of AmplitudeSEC Form 417 February 2026Class A Common Stock · traded 15 February 2026 · filed 17 February 2026
- had shares withheld for tax on 26,672 shares of AmplitudeSEC Form 417 February 2026Class A Common Stock · traded 15 February 2026 · filed 17 February 2026
- had shares withheld for tax on 36,092 shares of AmplitudeSEC Form 418 November 2025Class A Common Stock · traded 15 November 2025 · filed 18 November 2025
- had shares withheld for tax on 34,301 shares of AmplitudeSEC Form 419 August 2025Class A Common Stock · traded 15 August 2025 · filed 19 August 2025
- had shares withheld for tax on 25,533 shares of AmplitudeSEC Form 419 May 2025Class A Common Stock · traded 15 May 2025 · filed 19 May 2025
- was granted 852,878 shares of AmplitudeSEC Form 429 April 2025Class A Common Stock · traded 25 April 2025 · filed 29 April 2025
- exercised options over 23,866 shares of Amplitude (a derivative holding)SEC Form 45 February 2024Stock Options (Right to buy) · traded 1 February 2024 · filed 5 February 2024
- converted 23,866 shares of Amplitude (a derivative holding)SEC Form 45 February 2024Class B Common Stock · traded 1 February 2024 · filed 5 February 2024
- exercised options over 23,866 shares of AmplitudeSEC Form 45 February 2024Class A Common Stock · traded 1 February 2024 · filed 5 February 2024
- converted 23,866 shares of AmplitudeSEC Form 45 February 2024Class A Common Stock · traded 1 February 2024 · filed 5 February 2024
- exercised options over 23,866 shares of Amplitude (a derivative holding)SEC Form 43 February 2023Stock Options (Right to buy) · traded 1 February 2023 · filed 3 February 2023
- converted 23,866 shares of Amplitude (a derivative holding)SEC Form 43 February 2023Class B Common Stock · traded 1 February 2023 · filed 3 February 2023
- exercised options over 23,866 shares of AmplitudeSEC Form 43 February 2023Class A Common Stock · traded 1 February 2023 · filed 3 February 2023
- converted 23,866 shares of AmplitudeSEC Form 43 February 2023Class A Common Stock · traded 1 February 2023 · filed 3 February 2023
- exercised options over 70,000 shares of Amplitude (a derivative holding)SEC Form 423 February 2022Stock Option (Right to Buy) · traded 17 February 2022 · filed 23 February 2022
- exercised options over 23,866 shares of Amplitude (a derivative holding)SEC Form 423 February 2022Stock Option (Right to Buy) · traded 17 February 2022 · filed 23 February 2022
- converted 70,000 shares of Amplitude (a derivative holding)SEC Form 423 February 2022Class B Common Stock · traded 17 February 2022 · filed 23 February 2022
- converted 23,866 shares of Amplitude (a derivative holding)SEC Form 423 February 2022Class B Common Stock · traded 17 February 2022 · filed 23 February 2022
- exercised options over 70,000 shares of AmplitudeSEC Form 423 February 2022Class A Common Stock · traded 17 February 2022 · filed 23 February 2022
- exercised options over 23,866 shares of AmplitudeSEC Form 423 February 2022Class A Common Stock · traded 17 February 2022 · filed 23 February 2022
- converted 70,000 shares of AmplitudeSEC Form 423 February 2022Class A Common Stock · traded 17 February 2022 · filed 23 February 2022
- converted 23,866 shares of AmplitudeSEC Form 423 February 2022Class A Common Stock · traded 17 February 2022 · filed 23 February 2022
- ▼ sold on the open market 158,772 shares of AmplitudeSEC Form 430 September 2021Class A Common Stock · traded 28 September 2021 · filed 30 September 2021
- ▼ sold on the open market 142,000 shares of AmplitudeSEC Form 430 September 2021Class A Common Stock · traded 28 September 2021 · filed 30 September 2021
- converted 380,000 shares of Amplitude (a derivative holding)SEC Form 423 September 2021Class B Common Stock · traded 21 September 2021 · filed 23 September 2021
- exercised options over 105,000 shares of Amplitude (a derivative holding)SEC Form 423 September 2021Stock Option (Right to Buy) · traded 24 June 2021 · filed 23 September 2021
- exercised options over 105,000 shares of Amplitude (a derivative holding)SEC Form 423 September 2021Class B Common Stock · traded 24 June 2021 · filed 23 September 2021
- exercised options over 23,866 shares of Amplitude (a derivative holding)SEC Form 423 September 2021Stock Option (Right to Buy) · traded 24 June 2021 · filed 23 September 2021
- exercised options over 23,866 shares of Amplitude (a derivative holding)SEC Form 423 September 2021Class B Common Stock · traded 24 June 2021 · filed 23 September 2021
- gave away 475,000 shares of Amplitude (a derivative holding)SEC Form 423 September 2021Class B Common Stock · traded 28 June 2021 · filed 23 September 2021
- exercised options over 155,084 shares of Amplitude (a derivative holding)SEC Form 423 September 2021Stock Option (Right to Buy) · traded 30 August 2021 · filed 23 September 2021
- exercised options over 155,084 shares of Amplitude (a derivative holding)SEC Form 423 September 2021Class B Common Stock · traded 30 August 2021 · filed 23 September 2021
- converted 380,000 shares of AmplitudeSEC Form 423 September 2021Class A Common Stock · traded 21 September 2021 · filed 23 September 2021
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.