4 hedge funds and family offices disclose a ROK position in their latest SEC 13F filing — combined $218.8M in market value. Of those, 1 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Mairs & Power | Mairs & Power Inc | 330,334 | $128.5M | 1.24% | 2025-12-31 |
| 2 | Tom Gayner | Markel Group Inc. | 154,900 | $76.7M | 0.58% | 2026-06-30 |
| 3 | Ray Dalio | Bridgewater Associates LP | 37,799 | $13.6M | 0.06% | 2026-03-31 |
| 4 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 45 | $18K | 0.00% | 2025-12-31 |
As of the latest 13F window, 4 tracked superinvestors hold ROK. The largest disclosed position is Mairs & Power at $128.5M (1.2% 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 ROK, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
4 hedge funds and family offices disclose a ROK position in their latest SEC 13F filing — combined $218.8M in market value. Of those, 1 are classified as value investors.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Mairs & Power | Mairs & Power Inc | 330,334 | $128.5M | 1.24% | 2025-12-31 |
| 2 | Tom Gayner | Markel Group Inc. | 154,900 | $76.7M | 0.58% | 2026-06-30 |
| 3 | Ray Dalio | Bridgewater Associates LP | 37,799 | $13.6M | 0.06% | 2026-03-31 |
| 4 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 45 | $18K | 0.00% | 2025-12-31 |
As of the latest 13F window, 4 tracked superinvestors hold ROK. The largest disclosed position is Mairs & Power at $128.5M (1.2% 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 ROK, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
