Independent research on public SEC filings

See which insider purchases are actually worth investigating.

Reportable insider transactions are disclosed publicly on SEC Form 4. We score that record against 20+ years of Form 4 outcomes and show you the evidence behind each rating.

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Scoring model
Running
SEC filings
through 2026-09-18
Purchases reviewed
19 (last 14d)
Last qualifying score
2026-09-23 (4d ago)

Open-market buys only · research, not advice

20+
Years SEC Data
761
Backtested Trades
70.7%
Backtest Win Rate
21.9
Avg Days Held

How it works

1

Insiders buy their own stock

Executives and directors must tell the SEC within two business days of buying shares in their own company. Those filings are public — and they come from the people who know the business best.

2

A model scores every buy

Most insider purchases mean nothing. Each one is scored on who bought, how large the cheque was, how much it grew their stake, and the price setup — against two decades of past filings. Only the few that clear the bar become research cases.

3

You see the whole setup

Every research case shows the market price at detection, the model's framework and a plain-English reason it qualified — plus what could break it. This is research built from public filings, not financial advice.

04 / Insider Radar

Today's insider scores

Research signals from unusual SEC insider purchases. Each qualifying filing with its conviction, model framework, full thesis and the risks that could break it.

InsiderScanner identifies unusual insider purchases for research. Ratings, scenarios and historical statistics are model outputs, not investment recommendations.

New research case

A new model setup has qualified

Published 2026-09-23 · Review the complete thesis before acting.

HIGH conviction A rated
Ticker $HHH Howard Hughes Holdings Inc.
Filed byGrandisson MarcCOO, HHC, Exec COB, Vantage
Purchase$1,667,4282026-09-23
Price at scan$68.4327% of 52-week range
EvidenceStrong evidence3 of 5 factors observed
Why

The scanner qualified this filing, but a written thesis is not available for this record.

Watch

Review the SEC filing, company disclosures and current market conditions independently.

Trade at your own risk.

This is research generated from public information, not financial advice or a guarantee of profit. Verify the filing and decide whether the risk is appropriate for you.

Full research cards
HH
$HHH
Howard Hughes Holdings Inc.
HIGH conviction A rated
Strong evidence 3 of 5 factors observed
  • C-suite executive: observed COO, HHC, Exec COB, Vantage Title names CEO, CFO, COO, CTO, President, Chair or Chief
  • High conviction: observed HIGH Conviction tag equals HIGH
  • Oversold setup: not observed RSI 60.8 14-day RSI at or below 35
  • Near 52-week low: observed 26.9% of 52-week range Price in the bottom 35% of its 52-week range
  • Sizeable relative purchase: not observed $1,667,428 · 4.1 bps of market cap Purchase worth at least 0.10% of market capitalisation
  • Ownership change: not verifiable Not derivable from the current feed Needs each filer's holding before and after the transaction, which the Form 4 stream this site ingests does not carry.
How this outcome is measured

Fixed rules the historical test scores this filing against. They are not an entry price, a target or a position size for you, and no part of the site recommends acting on them. Model weight is a research-framework percentage, not a personalised amount — account size, dollar allocation and share count are never published.

Reference price$68.43
Test target$75.27
Test exitNone set
Scoring window30 days
Model weight20%
Grandisson Marc · COO, HHC, Exec COB, Vantage · $1,667,428 purchase · 2026-09-23
Why it qualified

The scanner qualified this filing, but a written thesis is not available for this record.

Watch before acting

No separate red-flag note was recorded. Review the filing and current company disclosures independently.

Price$68.43
Mkt Cap$4.1B
RSI (14)60.8
52W Low$60.09
52W High$91.07
20D Chg+5.4%
MX
$MX
Magnachip Semiconductor Corp
MEDIUM conviction B rated
Strong evidence 3 of 5 factors observed
  • C-suite executive: observed CEO Title names CEO, CFO, COO, CTO, President, Chair or Chief
  • High conviction: not observed MEDIUM Conviction tag equals HIGH
  • Oversold setup: not observed RSI 59.6 14-day RSI at or below 35
  • Near 52-week low: observed 14.6% of 52-week range Price in the bottom 35% of its 52-week range
  • Sizeable relative purchase: observed $318,496 · 26.4 bps of market cap Purchase worth at least 0.10% of market capitalisation
  • Ownership change: not verifiable Not derivable from the current feed Needs each filer's holding before and after the transaction, which the Form 4 stream this site ingests does not carry.
How this outcome is measured

Fixed rules the historical test scores this filing against. They are not an entry price, a target or a position size for you, and no part of the site recommends acting on them. Model weight is a research-framework percentage, not a personalised amount — account size, dollar allocation and share count are never published.

Reference price$3.3
Test target$3.63
Test exitNone set
Scoring window30 days
Model weight15%
Lee Chae · CEO · $318,496 purchase · 2026-09-23
Why it qualified

The scanner qualified this filing, but a written thesis is not available for this record.

Watch before acting

No separate red-flag note was recorded. Review the filing and current company disclosures independently.

Price$3.3
Mkt Cap$120M
RSI (14)59.6
52W Low$2.18
52W High$9.86
20D Chg+1.9%
What the last 30 days were made of 18 scored filings since 2026-08-29

Model rating

A+ 0 0%
A 4 22%
B+ 1 6%
B 13 72%

Conviction

High 3 17%
Medium 10 56%
Low 5 28%

Rating and conviction are research classifications of how strong the observed evidence was — model outputs, not recommendations and not a measure of what any position returned. These are counts of what the model published in this window, not a performance record and not a forecast; see Performance for resolved outcomes.

Ticker Insider Filed Model rating Amount
$MX
Magnachip Semiconductor Corp
 Lee Chae
CEO
 2026-09-23 B $318,496
$HHH
Howard Hughes Holdings Inc.
 Grandisson Marc
COO, HHC, Exec COB, Vantage
 2026-09-23 A $1,667,428
$AIAI
Aiai Holdings Corp
 Affeldt Eric
Dir
 2026-09-22 B $150,000
$INR
Infinity Natural Resources, Inc.
 Gieselman Scott
Dir
 2026-09-21 A $363,777
$CV
Capsovision, Inc
 Harari Eliyahou Et Al
10%
 2026-09-18 B $14,999,995
Preview

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FAQ

Common questions

Where does the data come from?

Every research case starts with an SEC Form 4 — the disclosure insiders are legally required to file within two business days of trading their own company's stock. All public record.

Is following insider trades legal?

Yes. Insiders disclose these trades publicly by law. Reading a public filing and deciding what to do with that information is completely legal. Trading on private, non-public information is the illegal kind — that's not what this is.

What's the difference between this and OpenInsider?

OpenInsider shows you every filing, unfiltered. We run each purchase through rules validated on two decades of historical data and only surface the ones that pass.

Is this investment advice?

No. This is published research on public filings, for informational purposes. See the full disclaimer.

How do I contact support?

Questions about your account, the analysis, or the site: support@insiderscanner.net. Legal, privacy, and security matters go to admin@insiderscanner.net instead — see the Terms and Privacy Policy.