Mitt Romney is holding another Republican retreat in June. Nearly the entire prospective 2016 GOP presidential field will be jockeying for attention. Robert Costa has details. (Jeff Simon/The Washington Post)

Former Massachusetts governor Mitt Romney, who recently has emerged from the political wilderness, will host his third annual policy summit this summer in Park City, Utah. The private gathering will be an important moment for several potential Republican presidential contenders, providing an opportunity for them to introduce themselves to Romney's network.

On Sunday, The Washington Post obtained a partial list of the more than 200 people scheduled to attend the conference, which will take place June 12-14. It features a mix of politicos, Wall Street titans, former government officials, entrepreneurs, and even sports figures, such as Denver Broncos quarterback Peyton Manning, who is slated to deliver a talk.

In background conversations, organizers acknowledged that most of the attendees will lean Republican, but said the conference's discussions would not serve a partisan agenda. Instead they described the event as a "leadership retreat" for Romney's circle of friends and associates, including Sacramento mayor Kevin Johnson, a Democrat.

Here's a guide to the guest list.

Republicans who may run for president in 2016: Gov. Chris Christie (N.J.), former Arkansas governor Mike Huckabee, Sen. Rand Paul (Ky.), and Rep. Paul Ryan (Wis.).

Former government officials: Former secretary of state George Shultz, former Treasury secretary Hank Paulson, and former CIA deputy director Michael Morell

Business leaders: Hewlett-Packard chief executive Meg Whitman, former Wal-Mart chief executive Lee Scott, Univision chief executive Randy Falco, Utah businessman John Miller, oil investors L.E. Simmons and Harold Hamm, construction magnate John Rakolta, IntercontinentalExchange Group chief executive Jeffrey C. Sprecher, investor Anthony Scaramucci, and Harvard Business School professor Clayton M. Christensen

Sports figures: New York Jets owner Woody Johnson and Denver Broncos quarterback Peyton Manning

The Romney family: Mitt Romney, his wife, Ann, and his son, Tagg, who works for Solamere Capital, the investment firm that is hosting the summit, will be there, as will others Romneys.

Romney's financiers: Spencer Zwick, former national finance chairman for Romney's campaign, Bob White, Romney's former business partner, plus dozens of former bundlers for Romney's campaign.