It appears that Catalyst Health Ventures, an investor in early stage healthcare companies, is looking to raise a new fund. The firm disclosed a $33 million securities offering — with the first sale yet to occur — in a recently filed U.S. Securities and Exchange Commission document. Managing partner Joshua Phillips declined to comment on plans for the fund, but according to Catalyst’s website, it focuses its investments in technologically advanced medical devices, diagnostics, instruments and drug development. Typically, the firm invests early and takes the lead on investments.