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Every officer, director, and 10%-owner insider filing across US markets - ingested from SEC EDGAR in real time, enriched with cluster detection, per-insider track records, activist 13D disclosures, and sector-level flow analysis. Surface high-conviction insider buys before they appear in mainstream coverage.
Insider Alpha is Blockcircle's real-time insider trading intelligence feed. It ingests every Form 4 filing from the SEC EDGAR system - covering officers, directors, and 10%-owner insider buys and sells across US markets - and adds cluster detection, per-insider track records, confidence scoring, and activist 13D disclosures.
Form 4 is the SEC disclosure that officers, directors, and 10%-or-greater shareholders of public companies must file when they buy or sell shares of the company. The filing is due within two business days of the trade. Insider Alpha pulls every Form 4 the moment it hits EDGAR and turns the raw XML into structured trade signals.
A cluster buy is when multiple insiders at the same company file open-market purchases within a short window, typically two to four weeks. Cluster buys have historically been one of the strongest insider-trading signals because they require independent decisions by multiple parties with material non-public information about the company's prospects.
Activist disclosures are 13D filings, which are required when an investor acquires more than 5% of a public company's shares with the intent to influence corporate governance, strategy, or capital allocation. 13D filings often precede major corporate actions like board changes, spin-offs, or sales.
Every insider in the database has a track record score based on the forward returns of their historical trades. The score weights size, frequency, conviction (purchases on the open market versus 10b5-1 sales), and historical hit rate. Insider Alpha highlights filings from top-decile insiders so you can prioritise the highest-signal filings first.
The squeeze view ranks tickers by insider buying combined with elevated short interest, looking for setups where insiders are accumulating shares against a high short-interest backdrop - a classic precursor to short squeezes.
Live Form 4 filings across US markets. Officers, directors, and 10%-owners. Cluster detection, ratio-of-holdings change, and plan-versus-discretionary classification. One click routes any signal into the Universal Trading Engine.
Unlock Insider Alpha — Form 4 filings, cluster scoring, and politician-overlay tracking.
Unlock with Plus →| Filed i | Trade i | Ticker i | Company i | Insider i | Title i | Trade i | Price i | Qty i | Own% i | Value i | Net Pos i | Trade |
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