One Rock Capital Partners, LLC is in advanced talks to buy Innophos Holdings, Inc. (NasdaqGS:IPHS), according to people familiar with the matter. One Rock Capital Partners is close to reaching a deal for Innophos Holdings, said the people, who asked to not be identified because the discussions are private. No transaction has been finalized and talks could fall through, the people said. Innophos rose as much as 12% before its shares were halted at $37.53 at 2:57 p.m. in New York trading October 17, 2019, giving it a market value of about $739 million. The shares are up about 15% since Sept. 10, when Bloomberg News reported that the company was working with financial adviser to explore options including a sale. Representatives for One Rock and Innophos declined to comment.