{"uid":"cap_odw5GOdmPAHzGlmDEBQMZ","slug":"fundflow-institutional-13f-ownership-flow-4ed75916","name":"FundFlow – Institutional 13F Ownership & Flow","description":"Institutional (13F) ownership & flow for a stock (?ticker=<stock ticker>)","url":"https://funds.lonestaroracle.xyz/funds","method":"GET","headers":{},"bodySchema":{"name":"FundFlow","tags":["13f","institutional","ownership","smart-money","equities"],"type":"object","version":"1.0.0","category":"markets","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{"ticker":{"type":"string","example":"NVDA","description":"Stock ticker to read institutional 13F flow for (e.g. AAPL, NVDA, GME). Aliases: symbol."}}}}},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"as_of":"2026-03-31","source":"yfinance (SEC 13F institutional holdings)","ticker":"GME","company":"GameStop Corporation","flow_signal":"ACCUMULATION","top_holders":[{"as_of":"2026-03-31","action":"added","holder":"Blackrock Inc.","pct_held":8,"value_usd_bn":1.2,"qoq_change_pct":1.7}],"flow_summary":{"added":7,"trimmed":1,"new_unverified":2,"top_holders_shown":10},"interpretation":"Institutions leaned to accumulation last quarter — 7 of the top 10 holders added, 1 trimmed.","institutions_count":482,"insider_ownership_pct":8.2,"institutional_ownership_pct":37.1}}}},"description":"Institutional 13F ownership and flow made agent-callable. One x402 call takes a stock ticker and returns a flow read (ACCUMULATION / NEUTRAL / DISTRIBUTION) from how the top institutional holders changed their positions quarter-over-quarter, plus total institutional ownership percent and count, insider ownership, and the top holders each tagged added / trimmed / held / new. The 'what are the big funds doing' read a trading or research agent needs, served pay-per-call. $0.05 in USDC on Base via x402. Source: yfinance aggregation of SEC 13F filings (free/public). NOTE: 13F is filed quarterly, ~45 days after quarter-end, so this is last-quarter positioning (lagged), and it covers long US equity positions only (no shorts or derivatives). Companion to EquityScope, AnalystEdge, InsiderFlow and CapitolFlow (the smart-money cluster)."},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_L5bYDTa8gPnAUXd3Z73Ah","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns SEC 13F-based institutional ownership data and a quarter-over-quarter flow signal (ACCUMULATION/NEUTRAL/DISTRIBUTION) for a given stock ticker","exampleAgentPrompt":"What are the big institutions doing with Nvidia — are they accumulating or distributing, and who are the top holders right now?","exampleUseCases":[{"title":"Smart-money signal for trading decision","prompt":"Before I add to my Tesla position, can you check whether institutions have been accumulating or trimming TSLA last quarter, and what percentage of the float they own?"},{"title":"Research report on institutional backing","prompt":"I'm writing a report on GameStop — pull the 13F institutional flow signal, total institutional ownership, and the top 10 holders with their quarter-over-quarter changes."},{"title":"Screening stocks for institutional conviction","prompt":"Check the institutional flow for AMD — I want to know if smart money is piling in or pulling out, how many institutions hold it, and which ones added the most last quarter."}],"resultDescription":"A JSON object containing: the stock ticker and company name, a flow signal (ACCUMULATION, NEUTRAL, or DISTRIBUTION), total institutional ownership percentage, insider ownership percentage, total institution count, a list of top holders each tagged with their action (added/trimmed/held/new), position value in USD billions, and percent held, plus a human-readable interpretation of the quarter's flow. Data is sourced from SEC 13F filings via yfinance and reflects the most recently filed quarter (lagged ~45 days after quarter-end).","failureModes":["Invalid or unrecognized ticker symbol returns an error or empty result","Very small-cap stocks with few 13F filers may return sparse holder data","Data is lagged by ~45 days after quarter-end — real-time positioning is not available","Non-US-listed equities are not covered by 13F filings and will not return results","Payment failure or insufficient USDC balance blocks the call via x402 protocol"],"whenToPreferThis":"Choose FundFlow when you need a structured, per-call read on institutional 13F positioning for a US-listed equity — specifically the flow direction (accumulation vs. distribution), top holder breakdown, and ownership percentages. Prefer this over manual SEC EDGAR lookups or premium data terminals when you want a lightweight, pay-per-call API ($0.05 USDC) that aggregates and interprets quarterly filings. Note the inherent quarterly lag and long-only scope (no shorts/derivatives reported).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:39:16.587Z","isFirstParty":false}