insider_buy_clusters
SEC Form 4 cluster buys. 3+ insiders bought the same ticker within 24h. Filters to open-market purchases only (P code), excludes awards/gifts.
insider_buy_clusters({ window_hours?: number, min_insiders?: number, min_net_buy_usd?: number })
why this exists
Single insider buy is noise. Cluster of 3+ in 24h has historically preceded outsized 1-3 month returns. EDGAR data is public but parsing Form 4 XML + dedup logic is non-trivial.
example agent prompt
Run insider_buy_clusters with min_insiders=3, window_hours=24. List tickers + total net buy USD. Skip any with concurrent dilution 8-Ks.
see also: sec8k_material_today · confluence_today