Peter Brown was a witness to some of the Beatles’ most important moments. His new book with the writer Steven Gaines is the oral history “All You Need Is Love: The Beatles in Their Own Words.” ...

Peter Brown, the CEO of top hedge fund Renaissance Technologies, slept 2,000 nights in his office. In an interview with Goldman Sachs, he said he valued the uninterrupted time with his colleagues.

Peter Brown said staff once had to install mirrors in the office to stop him crashing into them. Brown confirmed the unusual anecdote in a rare interview with Goldman Sachs.