Institutional ownership summary for a stock
API · /institutions-api
Institutional Stock Ownership API
healthy
3,256 Subscribers
Institutional (13F) ownership of US stocks, live and keyless, from Nasdaq's public company data. Every quarter the big money — Vanguard, BlackRock, State Street, hedge funds and pensions — must disclose its US equity holdings in 13F filings, and that ownership is one of the most-watched fundamentals: how much of a stock is held by institutions, which funds hold it, and whether smart money is accumulating or distributing it. The ownership endpoint gives a stock's institutional-ownership summary: the percentage of the company held by institutions, the total shares outstanding, the total dollar value of institutional holdings and the count of holders. The holders endpoint is the league table of the largest institutional holders — each fund with the shares it holds, how that changed last quarter (shares and percent), the dollar value and the filing date. The activity endpoint is the accumulation/distribution view: how many institutions increased, decreased, opened (new) or closed (sold-out) their positions and the shares involved, plus a net read on whether institutions were net buyers or sellers. This is the 13F institutional-ownership cut — distinct from the insider feed (company officers' and directors' own Form 4 trades), the short-interest feed (shares sold short and days-to-cover) and the analyst, quote and movers feeds. 13F holdings are disclosed quarterly, so the data updates each filing season, not intraday. Shares are counts, values in US dollars, percentages as reported. No key, nothing stored.
api.oanor.com/institutions-api
API health
healthy- Uptime
- 100.00%
- Server probes · 24h
- Avg latency
- 738 ms
- Server probes · 24h
- Subscribers
- 3,256
- active
- Total calls
- 68
- last 7 days
Pricing
Pick a tier — billed monthly, cancel anytime.
Free
Free
- 700 calls / month
- 2 requests / second
- Hard cap (429 above quota, no overage)
- 700 calls/month
- 2 req/sec
- All endpoints
- No credit card
Starter
€24.00 /month
- 26,000 calls / month
- 6 requests / second
- Hard cap (429 above quota, no overage)
- 26k calls/month
- 6 req/sec
- Ownership + top holders
- Email support
Pro
€83.00 /month
- 130,000 calls / month
- 16 requests / second
- Hard cap (429 above quota, no overage)
- 130k calls/month
- 16 req/sec
- Accumulation/distribution flow
- Priority support
Scale
€237.00 /month
- 660,000 calls / month
- 40 requests / second
- Hard cap (429 above quota, no overage)
- 660k calls/month
- 40 req/sec
- Full 13F feed
- Dedicated SLA
Built by
Related APIs
Other APIs with overlapping tags.
Spot Crypto ETF Tracker API
The US spot Bitcoin and Ethereum exchange-traded funds, tracked live and keyless from Yahoo Finance — the single biggest channel for institutional money into crypto. Since the 2024 launch of spot crypto ETFs, IBIT (BlackRock), FBTC (Fidelity), GBTC (Grayscale), ARKB, BITB and the rest trade billions of dollars a day, and their activity is a cleaner read on institutional appetite than any on-chain metric. The bitcoin endpoint lists every tracked spot Bitcoin ETF, ranked by trading volume, each with its price, daily change and volume, plus the aggregate total volume across all the funds and the day's volume leader. The ethereum endpoint does the same for the spot Ethereum ETFs (ETHA, FETH, ETHE and the rest). The etf endpoint returns one fund's detail by ticker. The summary endpoint is the institutional-appetite snapshot: total Bitcoin-ETF versus Ethereum-ETF trading volume and the ratio between them — which asset institutions are leaning into today — with the leading fund on each side. This is the spot-crypto-ETF trading cut — distinct from the coin price and market-cap feeds, the on-chain and mining feeds, and the Bitcoin valuation-model feed. It tracks ETF market activity (price, daily change, volume); it does NOT report fund flows or assets-under-management, which are not available without a paid/closed source — trading volume is the keyless institutional-interest proxy. Prices and volumes are in USD as reported by the exchange. No key, nothing stored beyond a short cache.
api.oanor.com/cryptoetf-api
Insider & Institutional Ownership API
Live US insider and institutional ownership data from Nasdaq — no key, nothing stored. The "who owns and who is trading" view of a stock: the corporate insiders (executives and directors) buying and selling their own shares, and the institutions holding the stock, distinct from the price-quote, movers and earnings APIs in the catalogue. The insider endpoint returns recent insider transactions — the insider, their relation to the company, the date, whether it was a buy or sell, the shares, the price, the computed value and the resulting holding — plus the 3-month and 12-month open-market buy/sell summary. The institutional endpoint returns the institutional ownership picture: the percent of shares held by institutions, the total holdings value and the largest holders with their position size, recent change and market value. The positions endpoint returns the institutional position-change breakdown — how many holders increased, decreased, opened new or sold out their positions, and the shares involved. Build insider-signal trackers, smart-money dashboards, ownership-change alerts and due-diligence tools on top of real Nasdaq ownership data. Look up any US stock by its ticker symbol; values and share counts are returned as clean numbers.
api.oanor.com/insider-api
Luxembourg Stock Exchange API
Live equity market data for the Luxembourg Stock Exchange (LuxSE), one of Europe's leading listing venues, with quotes priced in EUR. Pull real-time quotes for specific listings — ArcelorMittal, ENGIE, RTL Group, Aperam, Reinet Investments and the rest of the equity board — with last price, day change percentage and absolute change, open, high, low, traded volume, market capitalisation and sector; run a ranked screener sorted by market cap, day change, volume or price; search the listings by company name; or read a market summary with the number of advancers, decliners and unchanged stocks, total market capitalisation and the day top gainer, top loser and most-active share. Distinct from other regional-exchange APIs on the marketplace — this surfaces the Luxembourg Stock Exchange equity board specifically.
api.oanor.com/luxembourg-stock-api
Cyprus Stock Exchange API
Live equity market data for the Cyprus Stock Exchange (CSE), the regulated securities market in Nicosia, all priced in EUR. Pull real-time quotes for specific listings — Bank of Cyprus, Eurobank, Vassiliko Cement, Demetra Holdings and the rest of the board — with last price, day change percentage and absolute change, open, high, low, traded volume, market capitalisation and sector; run a ranked screener sorted by market cap, day change, volume or price; search the listings by company name; or read a market summary with the number of advancers, decliners and unchanged stocks, total market capitalisation and the day top gainer, top loser and most-active share. Distinct from other regional-exchange APIs on the marketplace — this surfaces the Cyprus Stock Exchange specifically (not the Colombo CSE).
api.oanor.com/cyprus-stock-api
Frequently asked questions
Quick answers about pricing, quotas, and integration.
How do I get an API key for Institutional Stock Ownership API?
Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Institutional Stock Ownership API with the x-oanor-key header. No credit card needed for the free tier.
What's the rate limit for Institutional Stock Ownership API?
Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.
How much does Institutional Stock Ownership API cost?
Institutional Stock Ownership API has a free tier with 100 calls / month. Paid plans start at €24.00 / month with higher quotas and faster rate limits.
Can I cancel my subscription anytime?
Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.
Is Institutional Stock Ownership API GDPR-compliant?
All requests to Institutional Stock Ownership API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.
Pick an endpoint from the list on the left to see its details and try it.
Code snippets
Sign up to get an API key, then call any path under your slug.
curl https://api.oanor.com/institutions-api/SOME_PATH \
-H "x-oanor-key: oanor_test_..."const res = await fetch("https://api.oanor.com/institutions-api/SOME_PATH", {
headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();$ch = curl_init("https://api.oanor.com/institutions-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);import requests
r = requests.get(
"https://api.oanor.com/institutions-api/SOME_PATH",
headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())Ratings
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