Beyond Meat is one of them, they're the ones with product in Carl's Jr and Del Taco. Impossible Foods is another, Burger King offers an impossible burger with their meat alternative. I don't think they're public yet, but it might be good to keep an eye out in case they decide to go public anytime soon. The others are regular beef companies that are getting into the plant based meat thing too because of their popularity. So maybe look up Tyson and Kellogg too.
edit. I found this website if you want to browse through https://vegfaqs.com/vegan-companies-to-invest-in/#:~:text=Unfortunately%2C there's no Gardein stock,some vegan%2C some not).