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Public disclosures only. Scores flag unusual patterns and are not evidence of wrongdoing. Not investment advice.

RH CHAIN…
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01Overview02Follow the Money03Daily Brief04Live05Congress06Corporate Insiders07Government Money08Political Influence09Institutions10Washington Network11Follow the Power12Disclosure Clock13AI Investigator14Watchlist
ConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
Data sources
SEC FORM 43h ago
HOUSE PTR3h ago
SEC 13F3h ago
ROBINHOOD CHAIN3h ago
SEC FORM 4/Derivative conversionVerified dataRule 10b5-1 plan

Skates Spenser reported AMPL

Director, Chief Executive Officer, 10% Owner · Amplitude, Inc. · Amplitude, Inc. — Class B Common Stock

Side
C
Value
—
Shares
100
Price
—
Executed
Dec 26, 2025
Disclosed
Dec 30, 2025
Disclosure timeline4 days from execution to publication · legal deadline 2 business days
Dec 26 executedDec 30, 2025 disclosed

AMPL · daily

Yahoo Finance chart API
▲Execution▼Disclosure●Material company filing●Other disclosed buy●Other disclosed sellUnofficial public endpoint; daily OHLCV, split-adjusted. Replace with a licensed feed for production.

Insider Score

Experimental signal
0/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Derivative conversion — administrative, little informational value

  • Relative size+1 / 25

No reported dollar value · 0.0% of prior position

  • Filing timing0 / 15

    Disclosed 2 business days after execution (deadline: 2)

  • Historical behavior+4 / 15

    2 prior trades recorded in this security

  • Frequency & clustering0 / 15

    No clustered activity in the dataset

  • Market events0 / 10

    No material company filing within 60 days after the trade

  • Pre-arranged plan-10

    Executed under a Rule 10b5-1 trading plan

    • The Insider Score measures how far a disclosure deviates from normal filing patterns. A high score is a prompt for research, not evidence of illegal insider trading.

    Other disclosed activity · AMPL

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    0
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    6,651 sh
    		Oct 28, 2026Oct 28, 2026
    traded Oct 28, 2026
    		+0dSEC FORM 4

    Evidence

    0
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    6,651 sh
    		Oct 28, 2026Oct 28, 2026
    traded Oct 28, 2026
    		+0dSEC FORM 4

    Evidence

    9
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$1,745
    100 sh
    		Oct 26, 2026Oct 28, 2026
    traded Oct 26, 2026
    		+2dSEC FORM 4

    Evidence

    13
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$3,494
    200 sh
    		Oct 26, 2026Oct 28, 2026
    traded Oct 26, 2026
    		+2dSEC FORM 4

    Evidence

    13
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$117K
    6,651 sh
    		Oct 28, 2026Oct 28, 2026
    traded Oct 28, 2026
    		+0dSEC FORM 4

    Evidence

    0
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    300 sh
    		Oct 26, 2026Oct 28, 2026
    traded Oct 26, 2026
    		+2dSEC FORM 4

    Evidence

    0
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    300 sh
    		Oct 26, 2026Oct 28, 2026
    traded Oct 26, 2026
    		+2dSEC FORM 4

    Evidence

    7
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    107.1K sh
    		Oct 23, 2026Oct 27, 2026
    traded Oct 23, 2026
    		+4dSEC FORM 4

    Evidence

    22
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$1.88M
    107.1K sh
    		Oct 23, 2026Oct 27, 2026
    traded Oct 23, 2026
    		+4dSEC FORM 4

    Evidence

    0
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    107.1K sh
    		Oct 23, 2026Oct 27, 2026
    traded Oct 23, 2026
    		+4dSEC FORM 4

    Evidence

    9
    RG
    Raji Vijaye GaneshDirector
    AMPLAmplitude, Inc.
    Grant or award
    		A—
    37.9K sh
    		Oct 15, 2026Oct 15, 2026
    traded Oct 15, 2026
    		+0dSEC FORM 4

    Evidence

    9
    SE
    Schultz EricaDirector
    AMPLAmplitude, Inc.
    Grant or award
    		A—
    892 sh
    		Oct 5, 2026Oct 7, 2026
    traded Oct 5, 2026
    		+2dSEC FORM 4

    Evidence

    9
    TT
    Tzuo TienDirector
    AMPLAmplitude, Inc.
    Grant or award
    		A—
    818 sh
    		Oct 5, 2026Oct 7, 2026
    traded Oct 5, 2026
    		+2dSEC FORM 4

    Evidence

    0
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    185.0K sh
    		Sep 10, 2026Sep 14, 2026
    traded Sep 10, 2026
    		+4dSEC FORM 4

    Evidence

    27
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$2.28M
    185.0K sh
    		Sep 10, 2026Sep 14, 2026
    traded Sep 10, 2026
    		+4dSEC FORM 4

    Evidence

    7
    SS
    Skates SpenserDirector, CEO and President, 10% Owner
    AMPLAmplitude, Inc.
    Derivative conversion · 10b5-1 plan
    		C—
    185.0K sh
    		Sep 10, 2026Sep 14, 2026
    traded Sep 10, 2026
    		+4dSEC FORM 4

    Evidence

    29
    CG
    Crook Nathaniel GlennChief Commercial Officer
    AMPLAmplitude, Inc.
    Open-market sale · 10b5-1 plan
    		SELL$3.90M
    300.0K sh
    		Sep 4, 2026Sep 9, 2026
    traded Sep 4, 2026
    		+5dSEC FORM 4

    Evidence

    9
    TT
    Tzuo TienDirector
    AMPLAmplitude, Inc.
    Grant or award
    		A—
    1,521 sh
    		Jul 5, 2026Jul 7, 2026
    traded Jul 5, 2026
    		+2dSEC FORM 4

    Evidence

    19
    CG
    Crook Nathaniel GlennChief Commercial Officer
    AMPLAmplitude, Inc.
    Tax withholding
    		F$614K
    101.3K sh
    		May 15, 2026May 19, 2026
    traded May 15, 2026
    		+4dSEC FORM 4

    Evidence

    11
    CA
    Casey AndrewChief Financial Officer
    AMPLAmplitude, Inc.
    Tax withholding
    		F$393K
    64.9K sh
    		May 15, 2026May 19, 2026
    traded May 15, 2026
    		+4dSEC FORM 4

    Evidence

    Evidence

    Verified data

    Read directly from the primary public document; every field below is as reported by the filer.

    Source

    Document
    SEC Form 4
    Publisher
    U.S. Securities and Exchange Commission (EDGAR)
    Document ID
    0001882913-25-000007
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Dec 26, 2025
    Published
    Dec 30, 2025
    Ingested by INSIDER
    Nov 5, 04:25 UTC
    Last re-read
    Nov 5, 04:25 UTC

    Extracted facts

    Filer
    Skates Spenser
    Role
    Director, Chief Executive Officer, 10% Owner
    Transaction
    Derivative conversionAs filed: “C”
    Asset
    Amplitude, Inc. — Class B Common Stock
    Ticker
    AMPL
    Shares
    100
    Price per share
    $0
    Execution date (reported)
    Dec 26, 2025
    Owned after transaction
    567.2K shares
    Rule 10b5-1 plan
    Yes, as checked by the filer
    Days from execution to publication
    4

    What this establishes

    Skates Spenser filed this Form 4 reporting a derivative conversion of AMPL on Dec 26, 2025. It became public on Dec 30, 2025. The filing establishes the reported transaction and the filer's stated role. It does not establish why the trade was made or what the filer knew.

    Extraction

    Method
    Form 4 XML
    Confidence
    1.00
    Director, Chief Executive Officer, 10% Owner
    Skates Spensercik:0001882913
    Issuer
    Amplitude, Inc.cik:0001866692

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.