"The Parnassus Endeavor Fund normally invests at least 80% of its net assets(plus borrowings for investment purposes) in companies believed by the Fund’s investment adviser (Adviser) to provide good workplaces for their employees. Companies with good workplaces usually are able to recruit and retain better employees, and perform at a higher level than competitors in terms of innovation, productivity, customer loyalty and profitability. While no company is perfect, the Adviser makes a judgment as to which companies have good workplaces based on factors such as respectful and fair treatment of employees, employee satisfaction and engagement, pay and benefits, family-friendly policies, and support for volunteerism and philanthropy."
Social investing as well as religious funds also put a higher priority on certain ethical criteria rather than overall profitability. The motive for investing in these funds depends on what one recognizes as their highest end.
By this logic, we could see B-corps in niches where capital is not a strategic advantage. The search for these niches is left as an exercise for the reader.