SEC 13D/13G Ownership Tracker — New 5%+ Stake Filings

Track new SEC Schedule 13D and 13G filings — the mandatory disclosure an investor must file within days of acquiring beneficial ownership of 5% or more of a public company's stock. A 13D signals activist or control intent (the filer may seek to influence management, force a sale, push for board seats); a 13G signals a passive stake, typically filed by index funds and institutional holders with no such intent.

Built for M&A watchers, activist-investor trackers, and IR teams who want to know the moment someone starts building a meaningful stake in a company — often the earliest public signal of an activist campaign or takeover interest.

Input

{
  "ticker": "AAPL",
  "keyword": "",
  "formType": "all",
  "daysBack": 14,
  "maxResults": 50
}

Field	Type	Description
ticker	string (optional)	Stock ticker of the subject (target) company to filter by.
keyword	string (optional)	Free-text search across the filing (e.g. a company or investor name).
formType	string	"all", "13D" (activist/control intent), or "13G" (passive stake). Default "all".
daysBack	number	How many days back from today to search, by filing date. Default 14, max 90.
maxResults	number	Max filings to return, most recently filed first. Default 50, max 100.

Leave both ticker and keyword blank to return all new 13D/13G filings market-wide.

Output

One record per filing:

{
  "accessionNumber": "0002100119-26-000139",
  "formType": "SCHEDULE 13G",
  "subjectCompany": { "name": "Apple Inc.", "ticker": "AAPL", "cik": "0000320193" },
  "filedBy": [
    { "name": "VANGUARD CAPITAL MANAGEMENT LLC", "ticker": null, "cik": "0002100119" }
  ],
  "filingDate": "2026-08-11",
  "filingUrl": "https://www.sec.gov/Archives/edgar/data/320193/000210011926000139-index.htm"
}

A search with no matches in the requested window returns no items but is still billed once for the search.

How it works

Direct calls to the official SEC EDGAR full text search API (efts.sec.gov), filtered to Schedule 13D and/or 13G filings. Ticker lookups resolve against SEC's own company-ticker mapping file. No proxy, no key, no scraping.

Note: the filing itself (linked via filingUrl) discloses the percent ownership and purpose of the transaction — the search index used here doesn't expose those fields directly, so this actor tells you who just crossed the 5% threshold on what, and you open the filing for the stake size and stated intent.

Pricing note

Billed per search, not per filing returned — one charge whether the search returns 0 filings or 100.

Related products

• SEC 8-K Material Event Tracker — material corporate events from public filings
• Insider Trading Alert — the officer/director equivalent (SEC Form 4), smaller trades by company insiders rather than outside 5%+ stakebuilders