MIAMI—Twenty-five of the world’s largest and most respected public relations firms have signed on as sponsors of the second Global Public Relations Summit, which will be held in Miami from November 11-14, 2013.

Partners include 14 of the world’s 17 largest public relations firms, and 22 of the 25 firms that signed on as partners for the first Summit in 2012.

Among those returning for the 2013 Summit: leading Indian independent Adfactors; Burson-Marsteller; Chandler Chicco; Citizen Relations; Cohn & Wolfe; Edelman; Fleishman-Hillard; FTI Consulting; GolinHarris; Grayling; Hill+Knowlton Strategies; Spanish independent Inforpress; Ketchum; international technology PR specialist Lewis; Marina Maher Communications; Mitchell Communications Group (now part of Dentsu Global); MSLGroup; Ogilvy Public Relations Worldwide; rbb Public Relations; Strategic Public Relations Group of Hong Kong; and We

New additions include Boston-based Omnicom-owned agency Cone; New York-based consumer specialist Kaplow; international corporate and financial communications specialist Llorente & Cuenca, a specialist in the Spanish-speaking world; and global technology PR firm Waggener Edstrom.

They will be joined, once again, by thenetworkone, which will for the second time be sponsoring the half-day Independent Public Relations Firm Forum, which will kick off the Summit on the afternoon of November 11.

That will be followed by two days of Summit sessions on November 12 and 13, a Global SABRE Awards banquet on the evening of November 13, and an additional half-day on November 14, featuring case histories selected from among the Global SABRE winners. The event will once again be held at the St Regis Bal Harbour Hotel in Miami.

“We are gratified once again at the level of support we have received from the industry for this initiative, says Paul Holmes, editor of The Holmes Report. “This is the only event that pulls together leaders from the agency and client side of the business, from around the world. We are confident that with the support of our partners, we can create an even more compelling, challenging and influential Summit in 2013.”