Three major grocery store chains and the union representing Southern California grocery workers have reached a tentative deal for a new contract, both sides have announced.

The United Food and Commercial Workers and representatives of the Vons, Albertsons and Ralphs chains said Wednesday they would not discuss details of the new contract until it is ratified by union members.

The grocers and union last agreed to a new contract in 2011 after tensions that nearly led to a strike. This year’s talks were apparently less acrimonious, with no threats of strikes or lockouts.

Ixia received on late Wednesday an expected letter from the Nasdaq warning of delisting from the exchange over the late filing of quarterly reports.

The Calabasas maker of computer networking software will have a hearing June 12 before the Nasdaq Listings Qualification Panel to present an updated plan to regain compliance and to request an extension of time for the filing of its delayed reports.

The company’s troubles began last fall when then-Chief Executive Vic Alston resigned after 18 months on the job after it was discovered he had falsified his resume. The resignation prompted a review by the board of director’s audit committee, which found accounting errors in previous financial reports.

Shares closed up a penny, or less than 1 percent, to $11.60 on the Nasdaq.

Warner Bros. Interactive Entertainment has created a new executive position as part of a realignment to improve revenue and support the transition to digital gaming, the company announced Thursday.

David Haddad has been named executive vice president, publishing operations at the gaming division of Warner Bros. Entertainment, in Burbank. Haddad reports to Martin Tremblay, president of Warner Bros. Interactive.

Haddad will oversee worldwide sales and distribution for console and digital games, digital publishing, live publishing and business intelligence.

“(Warner Bros. Interactive) has grown to be a top publisher and I am very pleased to help extend our reach and operate as effectively as possible to maximize future endeavors for continued positive results,” Haddad said in a prepared statement.