12 hedge funds and family offices disclose a MCO position in their latest SEC 13F filing — combined $12.81B in market value. Of those, 5 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Warren Buffett | Berkshire Hathaway Inc | 24,669,778 | $11.17B | 3.73% | 2026-06-30 |
| 2 | Dev Kantesaria | Valley Forge Capital Management | 1,317,188 | $596.6M | 19.14% | 2026-06-30 |
| 3 | Chuck Akre | Akre Capital Management, LLC | 1,156,893 | $524.0M | 10.23% | 2026-06-30 |
| 4 | Egerton Capital | Egerton Capital (UK) LLP | 773,409 | $395.1M | 4.29% | 2025-12-31 |
| 5 | Tom Gayner | Markel Group Inc. | 213,890 | $96.9M | 0.74% | 2026-06-30 |
| 6 | Ray Dalio | Bridgewater Associates LP | 30,139 | $13.7M | 0.06% | 2026-06-30 |
| 7 | Guy Spier | Aquamarine Capital Management, LLC | 27,000 | $7.3M | 4.31% | 2022-06-30 |
| 8 | Donald Yacktman | Yacktman Asset Management LP | 12,405 | $5.6M | 0.07% | 2026-06-30 |
| 9 | Francis Chou | Chou Associates Management Inc. | 1,500 | $766K | 0.38% | 2025-12-31 |
| 10 | AKO Capital | Ako Capital LLP | 736,568 | $376K | 5.73% | 2025-12-31 |
| 11 | ValueAct Capital | ValueAct Capital Management LP | 3,877,900 | $138K | 3.43% | 2007-12-31 |
| 12 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 60 | $31K | 0.00% | 2025-12-31 |
As of the latest 13F window, 12 tracked superinvestors hold MCO. The largest disclosed position is Warren Buffett at $11.17B (3.7% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying MCO, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
12 hedge funds and family offices disclose a MCO position in their latest SEC 13F filing — combined $12.81B in market value. Of those, 5 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Warren Buffett | Berkshire Hathaway Inc | 24,669,778 | $11.17B | 3.73% | 2026-06-30 |
| 2 | Dev Kantesaria | Valley Forge Capital Management | 1,317,188 | $596.6M | 19.14% | 2026-06-30 |
| 3 | Chuck Akre | Akre Capital Management, LLC | 1,156,893 | $524.0M | 10.23% | 2026-06-30 |
| 4 | Egerton Capital | Egerton Capital (UK) LLP | 773,409 | $395.1M | 4.29% | 2025-12-31 |
| 5 | Tom Gayner | Markel Group Inc. | 213,890 | $96.9M | 0.74% | 2026-06-30 |
| 6 | Ray Dalio | Bridgewater Associates LP | 30,139 | $13.7M | 0.06% | 2026-06-30 |
| 7 | Guy Spier | Aquamarine Capital Management, LLC | 27,000 | $7.3M | 4.31% | 2022-06-30 |
| 8 | Donald Yacktman | Yacktman Asset Management LP | 12,405 | $5.6M | 0.07% | 2026-06-30 |
| 9 | Francis Chou | Chou Associates Management Inc. | 1,500 | $766K | 0.38% | 2025-12-31 |
| 10 | AKO Capital | Ako Capital LLP | 736,568 | $376K | 5.73% | 2025-12-31 |
| 11 | ValueAct Capital | ValueAct Capital Management LP | 3,877,900 | $138K | 3.43% | 2007-12-31 |
| 12 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 60 | $31K | 0.00% | 2025-12-31 |
As of the latest 13F window, 12 tracked superinvestors hold MCO. The largest disclosed position is Warren Buffett at $11.17B (3.7% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying MCO, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
