MAIRS & POWER INC is an institutional investment manager that files quarterly 13F reports with the SEC. As of Q4 2025, the fund manages $10.4B in reported equity holdings across 243 positions. The largest holdings are MSFT (8.9%), NVDA (8.9%), AMZN (5.8%), GOOGL (5.1%), JPM (4.0%). The portfolio is concentrated in Other (93.2%), Communication Services (2.2%), Technology (1.7%). Data sourced from SEC EDGAR 13F filings (CIK 1070134).