The plan recently committed $245 million total to two private equity managers and one hedge fund manager.
A San Francisco-based private equity firm has raised $180 million from endowments, foundations and other investors.
The plan made a $10 million growth equity commitment at its May meeting.
The plan disclosed two private equity commitments at a board meeting yesterday.
The commitment represents a new relationship for the plan.
Plan also expects to receive an international value equity manager search update form its consultant later this month.
The plan liquidated its inhouse passive global equity mandate and made $1.6 billion in total commitments in April.
Plan added a $50 million commitment to an existing manager relationship.
Plan added $315 million in alternatives commitments with existing manager relationships last week.
The fund approved a revision to its investment policy statement to lift its prohibition of privately placed securities as requested by one its international large-cap equity managers and recommended by its general investment consultant.