Dan Loeb's Third Point hedge fund is stepping up its fight with Sotheby's.
It will nominate three people to the auctioneer's board of directors, according to a filing.
Loeb will be one of the nominees, along with Harry Wilson and Olivier Reza.
Sotheby's board is currently meeting in New York City, a source tells CNBC. Sotheby's shares fell 10 cents in morning trading. (What's the stock doing now? Click here)