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Inspire Medical (INSP) is Gaining Strength from Its Product Offering and Differentiation

Mairs & Power, an investment advisor, released the fourth-quarter 2025 investor letter for the “Mairs & Power Small Cap Fund.” A copy of the letter can be downloaded here. In 2025, artificial intelligence (AI) and market concentration dominated the market. Increased investment in technology and AI infrastructure drove rising valuations and corporate spending, leading to bubble-like tendencies. However, easing inflation, a Federal Reserve rate cut in Q4, and resilient corporate earnings provided some optimism. In this environment, the Fund returned 3.98% in 2025, trailing the Russell...