Every US institutional investment manager overseeing more than $100M has to disclose its long US equity positions to the SEC every quarter, via a form called a 13F-HR. That means Berkshire Hathaway's stake in Apple, Renaissance Technologies' quant positions, or a hedge fund's newest bet — all of it is public record. The catch is that raw 13F filings are dense SEC paperwork, not something you'd want to page through by hand.
What a 13F filing actually tells you
Each quarterly 13F filing lists, per institution:
- Every US-listed stock the institution held long, as of quarter-end
- Number of shares and the reported market value
- What percentage of the institution's total disclosed portfolio that position represents
What it can't tell you
13F filings are backward-looking and incomplete by design. They're due up to 45 days after quarter-end, so the positions you're reading are already 6-19 weeks old by the time they're public. They also only cover long equity positions — no short positions, no options, no non-US securities, no cash. Treat institutional ownership data as context for what smart money was doing recently, not a live feed of what they're doing right now.
Two ways to look it up
Search by institution — look up a fund by name (Berkshire Hathaway, BlackRock, Bridgewater, Renaissance Technologies) and see its full disclosed portfolio, ranked by position size, with the ability to flip between quarters to see what changed.
Search by stock — flip it around: pick a stock and see which institutions currently hold it, how large each position is relative to that fund's own portfolio, and whether ownership has been growing or shrinking.
Where Quantora fits
Quantora's Institutional Holdings tool reads directly from SEC EDGAR's 13F-HR filings — no estimates, no paid data terminal. Search any institution to see its full quarterly-disclosed portfolio, or search a stock to see who's holding it. It's part of the same free Stock Intelligence toolkit that also tracks insider transactions (Form 4), buybacks, and management changes (Form 8-K) — all sourced from the same public SEC filings, for any US-listed stock.