Transaction · 0001866692-26-000013

Liu Curtis

Liu Curtis, CTO, reported a transaction classified as withholding at Amplitude, Inc. involving 53878.000000 shares for an estimated $702030.34. Reported holdings after the transaction were 950316.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

withholdingSEC transaction code FCTO
AMPLAmplitude, Inc.
Filing timeAug 18
Trade dateAug 17, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$12.59
Pre-filing
1mo ago -23.7%1w ago -3.2%1d ago +3.5%
Returns since
7d +4.7%30d +9.8%90d +9.8%180d +9.8%1y +9.8%

AMPL price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
AMPL since 2026-08-18Filed 22 days ago · 30 days of pre-filing context shaded
Loading…
Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
withholding
Code F
Identifier
0001866692-26-000013
Class A Common Stock
Transaction date
Aug 17, 2026
Filed Aug 18, 2026, 09:19 PM · 1d delay
Shares
53.8k sh
$1.30k per share
Estimated value
-$70.2M
Computed from shares × price
Holdings after
950k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership
-12score
Filing-only score

-12

Compact filing score computed from stored Form 4 facts. Version v1.

Mixed or weak signal

This filing has a negative filing-only score. It may be less informative as an insider-activity signal and needs extra context.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Technology Officer

Officer YesDirector Yes10% YesOther No
Footnotes & amended
  1. F1

    Represents shares of the Issuer's Class A Common Stock withheld by the Issuer solely to satisfy tax withholding obligations in connection with the net issuance of shares of the Issuer's Class A Common…

  2. F2

    Includes 774,628 RSUs.

Original filing · 0001866692-26-000013
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

AMPL