MAIRS & POWER INC is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q1 2026, the fund manages $9.8B in reported equity holdings across 245 positions. The largest holdings are NVDA (8.5%), MSFT (7.3%), AMZN (5.5%), GOOGL (4.7%), GGG (3.3%). The portfolio is concentrated in Other (90.0%), Financial Services (3.4%), Communication Services (2.1%). Data sourced from SEC EDGAR 13F filings (CIK 1070134).