About SuperInvestors

How we track, score, and analyze the world's greatest investors.

What is SuperInvestors?

SuperInvestors tracks the portfolios of legendary value investors through their SEC 13F filings. Every quarter, institutional investment managers with over $100M in assets must disclose their US equity holdings. We collect, parse, and analyze these filings to show you exactly what the world's best investors are buying and selling.

But we go further than raw data. We score each investor across 8 dimensions to separate genuine conviction investors from asset gatherers. We track position changes quarter over quarter. We identify stocks where multiple top investors converge. And we generate AI-powered investment theses explaining why each investor likely holds each position.

This site is built for serious individual investors, financial advisors, and students of value investing who want to understand how the greatest capital allocators think and act — not for short-term traders looking for tips.

How We Score Investors

Every investor is scored on 8 dimensions, each rated 1–10. The weighted composite score determines their verdict. Weights reflect what matters most for generating actionable, high-signal investment ideas.

Philosophy Alignment

20% weight

How closely does this investor's philosophy match concentrated, long-term, downside-first value investing? Do they buy wonderful businesses at fair prices, focus on margin of safety, and think in decades?

Score 9-10

Clear, consistent philosophy focused on durable advantages and long-term compounding.

Score 1-3

Momentum-driven, macro-trading, or no coherent investment framework.

Concentration

15% weight

Does this investor make a few big bets with high conviction, or spray capital across hundreds of positions? Concentrated portfolios produce higher-signal 13F filings.

Score 9-10

5-15 positions, top 5 representing 60%+ of the portfolio.

Score 1-3

100+ positions with no clear conviction sizing.

Rationality

15% weight

Evidence of clear thinking, willingness to change mind with new data, avoidance of behavioral biases, and discipline under pressure.

Score 9-10

Admits mistakes publicly, holds through volatility when thesis intact, sells when thesis breaks.

Score 1-3

Chases momentum, panic-sells, anchors to positions despite thesis deterioration.

Integrity

15% weight

Alignment with investors, honest communication, fee structure fairness, absence of scandals or self-dealing.

Score 9-10

Co-invests alongside LPs, reasonable fees, returns capital when opportunities are scarce.

Score 1-3

Fee extraction, misleading communication, regulatory issues, conflicts of interest.

Track Record

15% weight

Long-term performance versus benchmarks, measured over full market cycles (10+ years). Consistency and risk-adjusted returns matter more than peak performance.

Score 9-10

Market-beating returns over 15+ years across multiple cycles with reasonable volatility.

Score 1-3

Short track record, inconsistent returns, or strong performance driven by leverage/luck.

Transparency

10% weight

How much can we learn from this investor's public communications? Quality of letters, speeches, interviews, and willingness to explain reasoning.

Score 9-10

Publishes detailed letters, gives talks, explains individual positions and mistakes.

Score 1-3

No public letters, never speaks publicly, opaque about investment process.

Relevance

5% weight

Is this investor still actively managing money and making decisions? Retired, deceased, or coasting managers produce stale 13F signals.

Score 9-10

Actively investing, recent high-conviction new positions, engaged in markets.

Score 1-3

Retired, deceased, or fund on autopilot with no active decision-making.

AGI Awareness

5% weight

Does this investor understand and incorporate the implications of artificial general intelligence into their analysis? AGI will reshape most businesses by 2030.

Score 9-10

Explicitly discusses AI/AGI impact on portfolio companies, positions reflect AI thesis.

Score 1-3

No engagement with technological disruption, portfolio ignores AI transformation.

Composite Score Formula

Composite = Philosophy(20%) + Concentration(15%) + Rationality(15%) + Integrity(15%) + Track Record(15%) + Transparency(10%) + Relevance(5%) + AGI Awareness(5%)

All scores are on a 1–10 scale. The composite is a weighted average, also on a 1–10 scale. Scores are based on extensive research into each investor's public record, writings, track record, and portfolio characteristics.

Verdict System

Each investor receives a verdict based on their composite score. The verdict determines how closely we track their portfolio activity.

FOLLOW

Score 7.5+38 investors

High-conviction investors whose 13F filings are worth studying in detail every quarter. Their new positions and significant increases are potential idea sources. These investors have demonstrated strong alignment with concentrated, long-term value investing and have the track records to back it up.

WATCH

Score 5.0 - 7.456 investors

Interesting investors worth monitoring but with meaningful gaps in our scoring criteria. They may have excellent track records but low concentration, or great philosophy but short history. Their 13F filings provide useful context but are not primary idea sources.

SKIP

Score Below 5.051 investors

Investors who do not meet our criteria for tracking. They may be quantitative/algorithmic, excessively diversified, have integrity concerns, or follow strategies that produce low-signal 13F filings. Included in our database for completeness but not actively monitored.

Data Sources

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

What is a 13F filing?

SEC Form 13F is a quarterly report filed by institutional investment managers with at least $100 million in qualifying assets under management. It discloses all US-listed equity positions (stocks, ETFs, certain options, and convertible securities) 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

Our processing

Within 24 hours of filing

What's included

  • +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 investor's CIK (Central Index Key). Filings are parsed, holdings are extracted, position changes are computed by comparing to the previous quarter, and cross-investor overlap is updated. AI theses are generated using Claude for significant position changes.

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 this data responsibly.

13F only shows long equity positions

Short positions, bonds, private investments, real estate, derivatives (except certain options), and cash positions are invisible. An investor's 13F may represent only 30-50% of their total portfolio.

45-day reporting delay

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

No position cost basis

13F filings show market value, not purchase price. We cannot determine whether a position is profitable or at what price the investor entered.

No short positions

Short positions are not disclosed in 13F filings. An investor may appear bullish on a sector while hedging heavily via shorts we cannot see.

No international holdings

13F only covers securities on US exchanges. Investors with significant international portfolios (e.g., Li Lu's BYD position) have incomplete disclosure.

Confidential treatment

Investors can request confidential treatment from the SEC for positions they are actively building, delaying disclosure by up to a year.

Attribution ambiguity

Large firms file a single 13F covering multiple portfolio managers. A position in Berkshire's 13F might be Buffett, Todd Combs, or Ted Weschler.

Small position noise

Positions under $200M may be analyst-level or compliance-driven rather than reflecting the lead PM's conviction. We focus on large, concentrated positions.

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 legendary 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 snapshots with a 45-day delay. Positions may have been sold by the time you see the data. Our investor scores are editorial assessments based on publicly available information and reflect our analytical framework, not objective truth. AI-generated theses are speculative interpretations, not statements of fact.

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