Private equity deals

Vista Equity Partners has agreed to acquire Websense Inc. (Nasdaq: WBSN), a San Diego-based provider of network security solutions against cyber-attacks and data theft, for approximately $907 million. The $24.75 per share deal represents around a 29% premium to Friday’s closing

Onex Partners has canceled its auction for Carestream Health Inc., a Rochester, N.Y.–based provider of medical imaging systems, after failing to secure adequate bids, according to Reuters. Onex had been seeking upwards of $3.5 billion for Carestream, with Bain Capital and Thomas H. Lee Partners reported to be the final bidders.

Univar Inc., a Redmond, Wash.-based distributor of chemistry and related services, has acquiredQuimicompuestos, a distributor of commodity chemicals in Mexico. No financial terms were disclosed. Univarbackers include Apollo Global Management, Clayton Dubilier & Rice, Norwest Equity Partners and Pantheon Ventures.

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