Vanguard has a stewardship team which decides how they vote on shareholder proposals. They try to vote in a way that maximizes long-term value.
https://corporate.vanguard.com/content/corporatesite/us/en/c...
https://corporate.vanguard.com/content/corporatesite/us/en/c...
>We vote in accordance with these governance principles to represent the long-term interests of Vanguard fund investors.
would imply that they may vote in ways that forward these leftist initiatives. However, there is no evidence to show that their votes on boards have any agenda beyond profit-maximization.
[0]https://www.blackrock.com/corporate/about-us/diversity-equit...
https://www.sierraclub.org/press-releases/2020/01/blackrock-...
It’s not “left wing” but rather an effective co-opting of the left wing. It steers the conversation to being about the skin color of the board members and executives and away from the concentrated ownership of corporate shares.