It's probably true. Many organizations fund PP, which is again astonishing because this is an organization that provides substantial (tens of millions) funds to Democratic candidates, and still manages to operate at a profit (look at the recent statements in their annual report, for example).
Whatever company you work for will probably do some things you're opposed to. For example, my division sponsors teachers in Teach for America - the head of my unit within the division REFUSES to support any of the company's efforts for TFA because, he argues, TFA hurts teachers and gives poor districts a cop-out for not advancing permanent teachers. In terms of external funding and philanthropy, you need to arrive at a bright line with an employer - if the employer requires that everyone participate in a fundraising drive, that may be a deal-breaker and be ready to live by that. If it's a matter of passing around the hat, just let the hat pass. You may even be able to enact some positive change by getting your workplace to support causes you DO believe in, perhaps while others are giving spare change to PP, you're out at a maternity home or domestic abuse shelter doing repair work.