Free 13F Fund Holdings API

Quarterly portfolios of 30 famous funds, parsed from SEC 13F-HR filings. Berkshire Hathaway, Bridgewater, Citadel, Pershing Square, Scion, and more, with position values, share counts, portfolio weights, and quarter-over-quarter changes.

Endpoints

GET

/api/markets/funds/{slug}e.g. berkshire-hathaway

Latest reported quarter for one fund: top 200 holdings by value. An unknown slug returns the full list of valid fund slugs.

GET

/api/markets/funds/csv

Holdings across all funds and recent quarters as CSV, newest first (50k row cap).

Example

import requests

r = requests.get("https://xoomar.com/api/markets/funds/berkshire-hathaway")
data = r.json()
print(data["fund"]["name"], data["quarter"])
for h in data["holdings"][:5]:
    print(h["issuerName"], h["valueUsd"], h["pctOfPortfolio"])

Response Shape

Every endpoint returns the same JSON envelope: { data, updatedAt, source, docs }. The data field is an array of records with these fields:

Field	Type	Description
fund	object	slug, name, manager, and SEC CIK of the fund
quarter	string (date) \| null	Reporting quarter end, e.g. 2026-03-31
holdings[].issuerName	string	Issuer name as filed
holdings[].valueUsd	number	Position value in US dollars
holdings[].shares	number \| null	Shares or principal amount held
holdings[].pctOfPortfolio	string \| null	Position weight within the reported portfolio
holdings[].changeShares	number \| null	Share change vs the prior quarter; null for new positions

13F filings are due 45 days after quarter end, so the latest quarter reflects positions up to that lag. Only long US-listed positions are reportable on 13F.

Numeric values arrive as strings where precision matters (prices, rates); parse with your language's decimal type for accounting-grade math. Rate limiting is fair-use per IP; a 429 response includes a Retry-After header. No authentication or API key needed. Attribution is appreciated: xoomar.com/markets.

Need more headroom? A free account raises your limit to 120 requests a minute with an X-API-Key header.

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Frequently Asked Questions

Which funds are covered?

Thirty curated funds including Berkshire Hathaway, Bridgewater, Citadel, Renaissance, Pershing Square, Scion, Appaloosa, and Baupost. Request any unknown slug to get the full list.

How much history is available?

Five years of quarterly filings per fund. The JSON endpoint returns the latest quarter; the CSV export includes recent quarters across all funds.

Why is the data delayed?

13F filings are due up to 45 days after quarter end. That lag is set by the SEC and applies to every 13F product.

What are the rate limits?

30 requests per minute per IP keyless, 120 with a free account key.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.