Net interest income expansion, substantial noninterest income growth, and ongoing strength in asset quality metrics and capital levels highlight the quarterGRAND RAPIDS, Mich., July 22, 2025 /PRNewswire/ -- Mercantile Bank Corporation (NASDAQ: MBWM) ("Mercantile") reported net income of $22.6 million, or $1.39 per diluted share, for the second quarter of 2025, compared with net income of $18.8 million, or $1.17 per diluted share, for the second quarter of 2024.  Net income during the first six months of 202 ...