DAG Ventures is planning to raise as much as $500 million for its fifth fund, the firm reported in a filing with the Securities and Exchange Commission. New York-based Mercury Capital Advisors was listed as placement agent for the fund. Palo Alto, Calif.-based DAG raised its $451 million fourth fund in 2008. DAG’s portfolio of companies includes FunnyOrDie.com, Gaia Online and Bloom Energy. Exits over the past couple of years include Mint.com, which was acquired by Intuit; and Metaweb, bought by Google.