SEC filings intelligence

Quantustik reads three families of SEC filings as market-regime and per-ticker signal inputs: Form 4 insider buy clusters, 13F institutional/whale position changes, and Schedule 13D activist stake disclosures. Per-ticker filing detail pages (Form 4, 8-K) are in progress, gated on an aggregate filings feed.

SEC Form 4 insider trading signals: what they can and can't tell you
13F whale tracking: what hedge fund filings can and can't tell you
Schedule 13D vs 13G: reading activist-investor filings correctly

Educational research only — not investment advice.