Artisan Mid Cap Fund, in their Q4 2020 investor letter, mentioned Generac Holdings Inc. (NYSE: GNRC ) and emphasized their views on the company. Generac Holdings Inc. is a Wisconsin-based manufacturing company that currently has a $19.9 billion market capitalization. Since the beginning of the year, GNRC delivered a 39.18% return, impressively extending its 12-month gains to 257.53%. As of March 17, 2021, the stock closed at $316.52 per share.