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Market Intelligence API – SEC 13D/13G Ownership Filings
x402
Market Intelligence API – SEC 13D/13G Ownership Filings is a paid API for AI agents from api.marketintelligenceapi.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Returns SEC Schedule 13D (activist) and 13G (passive) filings for holders above 5% of a US stock, including holder names, types, and percent of class over a specified lookback period.
Price / call$0.01
Success—
StatusUnknown
How this service works
Use to find activist and large holders of a US stock. Returns SEC Schedule 13D (activist) and 13G (passive) filings of holders above 5% over days=1-1095, with holder names, type and percent of class.
Output
A structured list of SEC Schedule 13D and 13G filers holding more than 5% of the specified US stock, with each record including the holder's name, holder type (e.g. hedge fund, institution, individual), filing type (activist 13D or passive 13G), and their percent of class, filtered to the requested lookback window (1–1095 days).
Example use cases
Activist investor due diligence on a target
“I'm researching TSLA — can you pull all SEC 13D activist filings and 13G passive filings for shareholders above 5% over the past year so I can see who the major players are and what percentage they hold?”
Monitoring new large-stake disclosures
“Check for any new Schedule 13D or 13G filings on AAPL in the last 30 days and tell me who's disclosing positions above 5% and whether they're classified as activist or passive holders.”
Identifying institutional block holders before a trade
“Before I take a position in MSFT, can you show me all the large holders above 5% who've filed 13D or 13G forms in the last 180 days, including their holder type and exact percentage of class?”
Technical details
Endpoint
GEThttps://api.marketintelligenceapi.com/api/v1/sec/ownership/AAPL?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to identify activist investors (13D filers) or large passive institutional holders (13G filers) of a specific US-listed equity above the 5% SEC disclosure threshold. Prefer this over general news or web search when you need structured, SEC-sourced ownership data with holder names, types, and exact percentages. Ideal for due diligence, merger/acquisition research, activist campaign monitoring, or pre-trade institutional ownership checks.
Side effects
- Invalid or unrecognized ticker symbol returns an error or empty result
- Lookback period outside 1–1095 days range may return an error
- Non-US or OTC stocks may return no filings
- Payment failure via x402 protocol results in 402 response and no data
- No filings in the requested time window returns an empty list
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| outputrequired | object |
Tags
x402
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