Three LI companies make the Fortune 500

Long Island is again home to three Fortune 500 companies.

The magazine Monday released its annual list of the nation’s largest businesses based on 2012 revenue. It has been a year since Nassau and Suffolk counties had more than two entries on the list because Arrow Electronics moved its headquarters to Colorado from Melville.

The biggest local company, based on revenue, is again Henry Schein Inc. The Melville-based medical products distributor moved up seven spots to 296th with sales of $8.9 billion in 2012.

“To climb more than 190 spots on the Fortune 500 list in less than a decade is a testament to our success in executing on our strategic plan that focuses on our customers’ needs by taking advantage of new technologies and tapping into growing markets,” said Henry Schein chief executive Stanley M. Bergman.

Cablevision Systems Corp. placed 382nd, down 34 spots from last year. The Bethpage communications company, which owns Newsday, posted revenue of $6.7 billion.

Rounding out the local entries was CA Technologies in Islandia, which placed 499th with sales of $4.8 billion. CA fell off the list two years ago.

Nationwide, the largest company was discount retailer Wal-Mart Stores Inc., which unseated energy giant ExxonMobil. The two have traded top honors several times in the past decade. In 2012, Wal-Mart had revenue of $469.2 billion and ExxonMobil, $450 billion.