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.
Trade date
Aug 17, 2026
Filing date
Aug 18, 2026
View on SEC Insider profile
Estimated value-$702kShares × reported price
Shares traded53.8k$13.03 per share
Holdings after950kDirect
% of reported position tradedUnavailableThis security and ownership context
How reported position traded is calculated

Calculated only for code-P purchases and code-S sales.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

AMPL price since this filing

Daily closing prices, with the filing date and available return windows
AMPL · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -23.7%1w ago -3.2%1d ago +3.5%
Returns since7d +4.7%30d +9.7%90d180d1y

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
53,878 sh
$13.03 per share
Estimated value
-$702k
Computed from shares × price
Holdings after
950,316 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Direct Ownership
Filing-only score

-12 points

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.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • timely_filing+4 points

    reporting_delay_days = 1

    Filing reported within two business days of the transaction.
  • tax_withholding-22 points

    transaction_code = F

    Tax withholding on vesting shares is mechanical.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

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 transactions

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Recent company activity

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