- SBF and Alameda Research (you probably knew this),
- the Berkeley Existential Risk Initiative, founded (https://www.existence.org/team) by the same guy who founded CFAR (the Center for Applied Rationality, a major rationalist organization)
- the "EA infrastructure fund", whose own team page (https://funds.effectivealtruism.org/team) contains the "project lead for LessWrong.com, where he tries to build infrastructure for making intellectual progress on global catastrophic risks"
- the "long-term future fund", largely AI x-risk focused
Take, for example, 80,000 Hours, among the more prominent EA organizations. Their top donors (https://80000hours.org/about/donors/) include:
- SBF and Alameda Research (you probably knew this),
- the Berkeley Existential Risk Initiative, founded (https://www.existence.org/team) by the same guy who founded CFAR (the Center for Applied Rationality, a major rationalist organization)
- the "EA infrastructure fund", whose own team page (https://funds.effectivealtruism.org/team) contains the "project lead for LessWrong.com, where he tries to build infrastructure for making intellectual progress on global catastrophic risks"
- the "long-term future fund", largely AI x-risk focused
and so on.