Secker & Warburg was formed in 1935 from a takeover of Martin Secker, which was in receivership, by Fredric Warburg and Roger Senhouse. The firm became renowned for its political stance, being both anti-fascist and anti-communist. It was bought in 2005 by Random House, and merged with Harvill Press to become Harvill Secker. It is currently an imprint of Vintage, part of the Penguin Random House Group.
See also Martin Secker & Warburg and Martin Secker & Warburg Ltd..
NB. currently unclear what the difference is between Secker & Warburg and Martin Secker & Warburg