EXCLUSIVE: Slate PR, the full-scale entertainment public relations firm based in Hollywood and New York, has promoted 10 staffers, including Shawn Purdy to EVP status and four others to VP. Purdy, who has been with the company founded by Robin Baum, Andy Gelb, Simon Halls, Stephen Huvane and Ina Treciokas since its 2010 inception, becomes EVP Events and Brands.