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Data sources

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

RH CHAIN…
OverviewFollow the MoneyDaily BriefLiveCongressCorporate InsidersGovernment MoneyPolitical InfluenceInstitutionsWashington NetworkFollow the PowerDisclosure ClockAI InvestigatorWatchlistConvergenceINSIDER AlphaSignal ledgerHistorical ReplayRobinhood ChainProofTradingTokenProAccountMethodologyMatch reviewLaunch readiness
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 418m ago
HOUSE PTR18m ago
SEC 13F18m ago
ROBINHOOD CHAIN18m ago
SEC FORM 4/Grant or awardVerified data

Gaugh David Russell reported AMPH

Director · Amphastar Pharmaceuticals, Inc. · Common Stock

Side
A
Value
—
Shares
8,143
Price
—
Executed
Jun 1, 2026
Disclosed
Jun 3, 2026
Disclosure timeline2 days from execution to publication · legal deadline 2 business days
Jun 1 executedJun 3, 2026 disclosed

AMPH · 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
21/ 100 · ROUTINE
Methodology →
  • Transaction type0 / 20

    Grant or award — administrative, little informational value

  • Relative size+13 / 25

No reported dollar value · 129.2% of prior position

  • Filing timing0 / 15

    Disclosed 2 business days after execution (deadline: 2)

  • Historical behavior+8 / 15

    First recorded trade by this actor 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

    • 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 · AMPH

    ScoreActorSecuritySideValueExecutedDisclosedLagSourceEvidence
    9
    GR
    Gaugh David RussellDirector
    AMPHAmphastar Pharmaceuticals, Inc.
    Grant or award
    		A—
    17.4K sh
    		Jun 1, 2026Jun 3, 2026
    traded Jun 1, 2026
    		+2dSEC 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
    0002075974-26-000003
    Machine-readable
    Structured copy

    Timestamps

    Event (reported)
    Jun 1, 2026
    Published
    Jun 3, 2026
    Ingested by INSIDER
    Nov 5, 03:55 UTC
    Last re-read
    Nov 5, 03:55 UTC

    Extracted facts

    Filer
    Gaugh David Russell
    Role
    Director
    Transaction
    Grant or awardAs filed: “A”
    Asset
    Amphastar Pharmaceuticals, Inc.
    Ticker
    AMPH
    Shares
    8,143
    Price per share
    $0
    Execution date (reported)
    Jun 1, 2026
    Owned after transaction
    14.4K shares
    Days from execution to publication
    2

    What this establishes

    Gaugh David Russell filed this Form 4 reporting a grant or award of AMPH on Jun 1, 2026. It became public on Jun 3, 2026. 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
    Gaugh David Russellcik:0002075974
    Issuer
    Amphastar Pharmaceuticals, Inc.cik:0001297184

    Revision history · 0

    No field has changed since this record was first ingested.

    Company events

    No records

    No material filings recorded for this issuer.