{"uid":"cap_ulCtLLMGIf4Gbit6z0RbO","slug":"market-intelligence-api-sec-13d-13g-ownership-filings-f1c0de1f","name":"Market Intelligence API – SEC 13D/13G Ownership Filings","description":"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.","url":"https://api.marketintelligenceapi.com/api/v1/sec/ownership/AAPL?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input","output"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"pathParams":{"type":"object","required":["symbol"],"properties":{"symbol":{"type":"string","examples":["AAPL"],"description":"Any US ticker with SEC filings (about 10,000, e.g. AAPL, KO, JPM), not only the example. Unknown: 404, not charged."}},"additionalProperties":false},"queryParams":{"type":"object","properties":{"days":{"type":"integer","default":365,"maximum":1095,"minimum":1,"description":"Look-back period in days"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"description":"Example JSON response returned by this endpoint"}},"additionalProperties":true}},"additionalProperties":false},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_5ntu63nVRcXHCCrXCf9QO","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Who are the activist and large passive shareholders of NVDA? Pull their SEC 13D and 13G filings from the last 365 days so I can see each holder's name, type, and percent of shares held.","exampleUseCases":[{"title":"Activist investor due diligence on a target","prompt":"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?"},{"title":"Monitoring new large-stake disclosures","prompt":"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."},{"title":"Identifying institutional block holders before a trade","prompt":"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?"}],"resultDescription":"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).","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:42:42.362Z","isFirstParty":false,"canonicalSlug":"market-intelligence-api-sec-13d-13g-ownership-filings-f1c0de1f"}