The Old Man and the Sea is dedicated to two of Hemingway's friends:
Charlie Scribner was Charles Scribner III, also known as Charles Scribner Jr., who served as president of Charles Scribner's Sons from 1932 until his death in February 1952. The Old Man and the Sea, which was first published in Life magazine in September 1952, was therefore dedicated to him posthumously.
Max (or Maxwell) Perkins served as Hemingway's editor from the publication of his first major novel, The Sun Also Rises, through The Old Man and the Sea. Perkins also served as editor for Thomas Wolfe and F. Scott Fitzgerald.
You can see photos of the first edition of the book here.