The Data API
Free, read-only JSON over the site's cached SEC-filing data. Every response carries its counts, attribution, disclaimer and — where one applies — the reporting period.
GET https://tradefilings.com/api/v1
The index endpoint lists every route. The essentials:
Tracked managers with latest-quarter statistics
One manager: profile, per-quarter stats, filing history
A manager's reported positions (options flagged, never netted)
Quarter-over-quarter changes by status
Securities ranked by tracked ownership
A security's ownership history by quarter
Who holds it, with weights and statuses
The institutional screener, parameterized
Most-held securities for any set of manager CIKs
The 13F filing feed (all filers)
Insider transactions; code P = open-market purchases
Schedule 13D/13G filings
Sector share of tracked value, quarter over quarter
Ingest freshness and recent pipeline jobs
Search managers and securities
Terms: served from cache with modest limits; attribution required if you republish (link this site and SEC EDGAR); research only — the disclaimer in every response applies. Endpoints may evolve; breaking changes will be announced on this page.