Following are top five publishers in the US:

Random House

Random House, Inc. is the world’s largest English-language general trade book publisher. It is a division of Bertelsmann AG, one of the foremost media companies in the world. Together, these groups and their imprints publish fiction and nonfiction, both original and reprints, by some of the foremost and most popular writers of our time. They appear in a full range of formats–including hardcover, trade paperback, mass market paperback, audio, electronic, and digital, for the widest possible readership from adults to young adults and children.

HarperCollins

HarperCollins Publishers is one of the world’s leading English-language publishers with headquarters in New York. The company is a subsidiary of News Corporation. HarperCollins is a broad-based publisher with strengths in literary and commercial fiction, business books, children’s books, cookbooks, and mystery, romance, reference, religious, and spiritual books. The company has revenues that top $1 billion annually.

Simon & Schuster

Simon & Schuster, Inc., a part of the CBS Corporation, is a global leader in the field of general interest publishing, dedicated to providing the best in fiction and nonfiction for consumers of all ages, across all printed, electronic, and audio formats. Its divisions include Simon & Schuster Adult Publishing, Simon & Schuster Children’s Publishing, Simon & Schuster Audio, Simon & Schuster Digital, and international companies in Australia, Canada, and the United Kingdom.

Penguin

Penguin Group (USA) Inc. is the US affiliate of the internationally renowned Penguin Group, the second-largest English-language trade book publisher in the world. The company possesses perhaps the world’s most prestigious list of best-selling authors and a backlist of unparalleled breadth, depth, and quality. The Penguin Group’s roster of bestselling authors is a Who’s Who of the industry.

Hachette

Hachette Book Group USA (HBG) was created when Hachette Livre, a French publishing company, acquired Time Warner Book Group from Time Warner in 2006. In one year, HBG publishes approximately 450 adult books, 150 young adult and children’s books, and 60 audio book titles. In 2006, the company had a record 71 books on the New York Times bestseller list, with 17 of them ranked #1.