4 hedge funds and family offices disclose a MSI position in their latest SEC 13F filing — combined $229.2M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Mairs & Power | Mairs & Power Inc | 525,214 | $201.3M | 1.94% | 2025-12-31 |
| 2 | David Rolfe | Wedgewood Partners Inc | 71,724 | $27.5M | 5.13% | 2025-12-31 |
| 3 | Torray Funds | Torray Investment Partners LLC | 566 | $217K | 0.03% | 2025-12-31 |
| 4 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 476 | $182K | 0.03% | 2025-12-31 |
As of the latest 13F window, 4 tracked superinvestors hold MSI. The largest disclosed position is Mairs & Power at $201.3M (1.9% 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 MSI, 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 MSI position in their latest SEC 13F filing — combined $229.2M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Mairs & Power | Mairs & Power Inc | 525,214 | $201.3M | 1.94% | 2025-12-31 |
| 2 | David Rolfe | Wedgewood Partners Inc | 71,724 | $27.5M | 5.13% | 2025-12-31 |
| 3 | Torray Funds | Torray Investment Partners LLC | 566 | $217K | 0.03% | 2025-12-31 |
| 4 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 476 | $182K | 0.03% | 2025-12-31 |
As of the latest 13F window, 4 tracked superinvestors hold MSI. The largest disclosed position is Mairs & Power at $201.3M (1.9% 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 MSI, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
