Mairs & Power, an investment advisor, released the third-quarter 2025 investor letter for the “Mairs & Power Balanced Fund.” A copy of the letter can be downloaded here. As we move into 2025, the market’s concentration persists, with a few dominant mega-cap stocks tied to artificial intelligence (AI) driving most of the favorable outcomes. The fund returned 6.47% in the first nine months of 2025. The fund underperformed the benchmark composite indexes (60% S&P 500 Total Return Index and 40% Bloomberg U.S. G ...