The "Big 5" publishers in the United Kingdom are Penguin Random House, HarperCollins, Hachette, Macmillan, and Pan Macmillan.
Penguin Random House is the largest publishing company in the UK, with renowned imprints such as Ladybird, Dorling Kindersley, and Bodley Head. Their authors include popular authors such as J.K.Rowling and John Grisham.
HarperCollins is the second largest publishing house in the UK and publishes both fiction and non-fiction titles. HarperCollins’ imprints include 4th Estate and William Collins.
Hachette is the third largest publisher in the UK, specialising in fiction, non-fiction, educational, and reference books. Their imprints include Little, Brown, Orion, and Quercus.
Macmillan is the fourth largest publisher in the UK, publishing books across all genres. Macmillan’s imprints include Pan Macmillan, Macmillan Children’s Books, and Mantle.
Finally, Pan Macmillan is the fifth largest publishing house in the UK. They focus on non-fiction, fiction, and children’s books. Their authors include popular authors such as Alain de Botton and Ken Follett.
The Big 5 publishers in the UK are responsible for some of the largest and bestselling books in the world, including popular titles such as Harry Potter, The Girl on the Train and The Hunger Games.