One was Entegris (ENTG, Financial), which in December acquired CMC Materials, a company we’ve long held in the Mairs & Power Small Cap Fund. Both companies supply the semiconductor industry with high-end consumables like filters and slurries, which are extremely important in the production of today’s higher-density chips. While Entegris is headquartered on the East Coast, we’ve had good access to its management team, and we believe the company is making smart investments for the future.
From Mairs and Power (Trades, Portfolio) Growth Fund's fourth-quarter 2021 commentary.