Using the market‐based‐view of the firm, this study investigates the relationship between trademark intensity and firm performance under the conditions of product market competition, total factor productivity, and SG&A efficiency. Higher trademark intensity is more positively associated with performance, and this positive association is amplified under higher product market competition or weakened under higher SG&A efficiency or total factor productivity. To address potential endogeneity, we employ partialing out lasso regression and cross‐fit partialing out lasso regression techniques, which yield consistent results. The findings provide valuable insights into the interplay between trademark intensity and firm performance.