The Grand Portfolio: What 80 Superinvestors Own Together Reveals
What happens when you combine the portfolios of 80 of the world’s most successful investors into a single aggregate view? You get something we call the Grand Portfolio --- a weighted composite of every position held by every superinvestor we track, drawn from their latest 13F filings with the SEC. It is not a model portfolio or a recommendation. It is a data-driven map of where the most informed institutional capital is concentrated.
How the Grand Portfolio Works
The Grand Portfolio aggregates holdings across all tracked superinvestors. For each stock, we calculate:
| Metric | Definition |
|---|---|
| Number of holders | How many of the 80 tracked managers own this stock |
| Combined value | Total dollar value held across all managers |
| Average portfolio weight | The mean percentage this stock represents across holding funds |
| Max weight | The highest portfolio weight any single manager has in this stock |
These metrics together tell a story that no individual filing can. A stock held by 25 managers at a combined value of $40 billion represents broad institutional consensus. A stock held by 3 managers but at 15% portfolio weight for each represents concentrated, high-conviction positioning.
Not an Index
The Grand Portfolio is not a market-cap-weighted index. It is an ownership-weighted aggregate. A $50 billion company held by 30 superinvestors will rank higher than a $500 billion company held by 5. This makes it fundamentally different from the S&P 500 or any passive index --- it reflects active, deliberate allocation decisions.
What the Top Holdings Reveal
The stocks at the top of the Grand Portfolio share several characteristics that are worth examining:
High Holder Count (Broad Consensus)
Stocks owned by 20 or more of the 80 tracked managers tend to share these traits:
- Large market capitalization ($50B+), providing the liquidity needed for institutional-scale positions
- Strong free cash flow generation, which value and quality investors prioritize
- Dominant competitive positions in their respective industries
- Reasonable valuations relative to their growth profile, or a clear catalyst for re-rating
These consensus picks represent a shared institutional view that transcends individual investment styles. When deep value investors, growth investors, and event-driven managers all own the same stock, the agreement likely reflects fundamental quality rather than style-specific bias.
High Average Weight (Concentrated Conviction)
Some stocks may not be held by many managers but carry outsized portfolio weights among those who do hold them. These are the high-conviction, concentrated bets:
| Holder Count | Avg Weight | Interpretation |
|---|---|---|
| 25+ holders, 2-4% avg weight | Broad consensus, moderate conviction per fund | |
| 5-10 holders, 8-15% avg weight | Concentrated conviction among a smaller group | |
| 30+ holders, 5%+ avg weight | Rare: both broad consensus AND high conviction |
The third category --- broad ownership combined with high average weight --- represents the strongest institutional endorsement. These positions are uncommon and worth close examination when they appear.
The Overlap Signal
One of the most valuable aspects of the Grand Portfolio is its ability to surface overlap between managers with different investment approaches. Consider what it means when:
- A deep value manager like Seth Klarman holds the same stock as a growth-oriented manager like Chase Coleman
- A macro-focused fund like Appaloosa and a fundamental stock-picker like Akre Capital Management agree on the same name
- A concentrated fund with 15 positions and a diversified fund with 100 positions both rank the same stock as a top-5 holding
This cross-style convergence is one of the most reliable signals in our dataset. It suggests the stock’s appeal is robust across multiple analytical frameworks, not dependent on any single investment thesis.
Convergence Scoring
When evaluating a stock’s Grand Portfolio ranking, give extra weight to situations where diverse investment styles converge. A stock held by five value investors tells you value investors like it. A stock held by two value investors, two growth investors, and an activist tells you something more fundamental about the company.
What the Grand Portfolio Does NOT Tell You
Timing
The Grand Portfolio is a quarterly snapshot. It tells you what managers held on the last day of the quarter, not when they bought or what they plan to do next. A consensus top holding could be one many managers are actively exiting.
Short Positions
13F filings do not disclose short positions. Some managers in the Grand Portfolio may hold offsetting short positions against their long holdings, changing the effective exposure from what the data suggests.
Position Age
A stock held by 30 managers might be a fresh consensus forming around a new idea, or it might be a legacy position that many managers are gradually winding down. Always check the Activity page to see whether the aggregate position is being built or reduced.
Concentration Context
A 3% average weight means very different things to different managers. For a 15-position concentrated fund, 3% is a minor position. For a 100-position diversified fund, 3% represents meaningful allocation. The Grand Portfolio averages across different portfolio construction approaches.
How to Use Grand Portfolio Data
For Idea Generation
The Grand Portfolio is one of the best starting points for investment research. Stocks that rank highly on both holder count and average weight have passed the scrutiny of multiple sophisticated analytical processes. This does not mean they will outperform, but it means they are worth investigating.
For Portfolio Benchmarking
Compare your own holdings against the Grand Portfolio. Are you positioned in stocks that institutional consensus favors? Are you taking contrarian positions against the aggregate institutional view? Neither is inherently right or wrong, but understanding where you agree and disagree with institutional capital helps you sharpen your own thesis.
For Risk Assessment
If you hold a stock that is dropping out of the Grand Portfolio --- fewer managers holding it, declining aggregate value --- that is a risk signal worth investigating. The managers exiting may see something you have not yet considered.
For Sector Analysis
The Grand Portfolio’s sector breakdown reveals where institutional capital is concentrated relative to market-cap weights. Sectors that are overweight versus the S&P 500 reflect active allocation decisions; sectors that are underweight reflect active avoidance.
Comparing the Grand Portfolio to the S&P 500
The differences between the Grand Portfolio and a passive index are instructive:
| Dimension | Grand Portfolio | S&P 500 |
|---|---|---|
| Weighting | Ownership-based (active decisions) | Market-cap-weighted (passive) |
| Number of stocks | 800+ (across all tracked managers) | 500 |
| Concentration | Top 10 = ~25% of aggregate value | Top 10 = ~35% of index value |
| Rebalancing | Quarterly (based on new filings) | Ongoing (market-cap driven) |
| Sector bias | Reflects active allocation | Reflects market capitalization |
The Grand Portfolio tends to underweight the largest mega-cap names relative to the S&P 500, because active managers spread their capital more evenly than a cap-weighted index. It also tends to overweight financials and healthcare relative to the index, reflecting the value orientation of many tracked managers.
Disclaimer
The Grand Portfolio is an aggregation of publicly reported 13F holdings for informational purposes only. It is not a model portfolio, investment recommendation, or trading strategy. Holdings are reported with a 45-day delay and may not reflect current positions. Past institutional ownership patterns do not predict future returns. Always conduct your own research before making investment decisions.
Explore the Data
You can explore the complete Grand Portfolio on our Grand Portfolio page, which includes:
- Every stock held by at least one tracked superinvestor, sorted by number of holders or combined value
- Sector allocation breakdown compared to the overall market
- Individual stock detail pages showing which specific managers hold each position
- Links to each manager’s portfolio page for deeper analysis
The institutional ownership data is public. The aggregation and cross-referencing is what transforms raw filings into a research tool.