About SuperInvestors

A tracker for what notable investors hold, built from their SEC 13F filings.

What is SuperInvestors?

SuperInvestors tracks what notable investors hold, drawn directly from their SEC 13F filings. Every quarter, institutional investment managers with over $100M in qualifying US assets must disclose their long US equity holdings. We collect, parse, and organize these filings so you can see what each tracked investor owns and how their positions change quarter over quarter.

On top of that filing data, the site is growing an emerging layer of AI-assisted, per-stock research — context on individual positions to help you study them, not tips to act on.

It is built for people who want to understand how respected capital allocators are positioned, using the official public record rather than rumor or marketing.

Data Source

All portfolio data comes from SEC EDGAR 13F-HR filings — the official, legally mandated disclosure of institutional holdings.

What is a 13F filing?

SEC Form 13F-HR is a quarterly report filed by institutional investment managers with at least $100 million in qualifying assets. It discloses long positions in US-listed securities — stocks, ETFs, certain options, and convertibles — held at the end of each calendar quarter.

Filing timeline

Quarter ends

Mar 31, Jun 30, Sep 30, Dec 31

Filing deadline

~45 calendar days after quarter end

Frequency

Quarterly

What's included

  • +Long positions in US-listed common and preferred stocks
  • +ETFs and closed-end funds
  • +Equity options (puts and calls on specific stocks)
  • +Convertible debt securities
  • +Share count, market value, and investment discretion per position

Data pipeline

We fetch 13F XML filings directly from SEC EDGAR using each filer's CIK (Central Index Key). Filings are parsed, holdings are extracted, and position changes are computed by comparing each quarter to the previous one.

Coverage

Not every notable investor files a US 13F. We're explicit about the gap between the profiles we track and the ones with loaded filing history.

149

tracked investor profiles

Notable investors and funds with a profile page on the site.

83

with loaded 13F history

Profiles backed by parsed SEC 13F-HR filings and quarter-over-quarter holdings.

~8,000

all 13F filers (coming)

A directory of every institutional manager that files a 13F-HR is being added.

Many tracked profiles genuinely don't file US 13Fs — non-US managers, historical figures, endowments, VC/PE firms, and individuals whose holdings sit inside another filer. Those profiles are kept for context and labeled as profile-only, not presented as having filing coverage they lack. A directory of all ~8,000 institutional 13F filers is being added so the full universe is searchable.

Methodology

13F filings report position value and share count, but not the prices an investor actually paid. We estimate trade prices, cost basis, and returns from quarter-end marks. These are approximations, labeled as estimates throughout the site.

Estimated trade prices

A 13F shows position value and share count at each quarter-end, but not the price at which shares were bought or sold. To estimate the price paid for a quarter’s change in shares, we use the quarter mean: the midpoint of the consecutive quarter-end value-per-share marks. This is an approximation, not the investor’s actual fill price.

Running-average cost basis

Cost basis for a position is tracked as a running average. Each quarter’s estimated buys raise the average cost; sells reduce shares at the prevailing average. This produces an approximate, evolving cost basis from public filings alone.

Returns vs the S&P 500

Position and portfolio returns are benchmarked against the S&P 500 over the same period, so performance is shown relative to simply owning the index rather than in isolation.

Stock-split adjusted

Share counts and per-share figures are adjusted for stock splits so that quarter-over-quarter comparisons and cost-basis math stay consistent across split events.

Limitations

13F filings are the best publicly available window into institutional portfolios, but they have significant blind spots. Understanding these limitations is essential for using the data responsibly.

Long US equity only

A 13F discloses only long positions in US-listed securities (stocks, ETFs, certain options, and convertibles). Short positions, bonds, private investments, real estate, cash, and most derivatives are invisible. An investor’s 13F may represent only part of their total portfolio.

~45-day reporting delay

Holdings are reported as of quarter-end, but filings are due roughly 45 days later. By the time the data is public, positions may already have changed.

Quarterly snapshots only

13F is a quarterly snapshot. Intra-quarter trades that open and close before a quarter-end never appear, and the timing of any change within the quarter is unknown.

No shorts, options intent, or non-US holdings

Short books, the directional intent behind options, and securities listed only on non-US exchanges are not disclosed. Managers with significant international or hedged exposure have incomplete 13F disclosure.

Estimates, not actuals

Estimated trade prices, running-average cost basis, and derived returns are approximations built from quarter-end marks. They are labeled as estimates and should not be read as the investor’s realized prices or returns.

Not investment advice

This is an educational and research tool. Nothing here is investment advice, a recommendation, or a solicitation. The fact that a notable investor owns a stock does not mean you should — their horizon, risk tolerance, and information set differ from yours.

Not Investment Advice

SuperInvestors is an educational and research tool. Nothing on this site constitutes investment advice, a recommendation to buy or sell any security, or a solicitation of any kind. The fact that a notable investor owns a stock does not mean you should buy it — they may have a different time horizon, risk tolerance, portfolio context, or information set than you do.

13F filings are backward-looking, long-US-equity-only snapshots with a roughly 45-day delay. Positions may have been sold by the time you see the data, and shorts, options intent, and non-US holdings are not disclosed at all. Estimated prices, cost basis, and returns are derived approximations, not realized figures.

Always do your own research. Never invest based solely on what someone else is buying. Understand a business before you own it.