Allen & Company LLC is an American privately held boutique investment bank based at 711 Fifth Avenue, New York.

[4] Allen & Company, which since 2002 has been run by Herbert Allen III,[5] grandnephew of the founder, generally shies away from publicity and does not maintain a website or issue press releases, with the exception of the extensive media procured for its annual conference evidenced by its allowance of access to the conference by financial media properties such as CNBC, The Wall Street Journal and others to cover its event.

Since its founding in 1982, the Allen & Company Sun Valley Conference has regularly drawn high-profile attendees such as Bill Gates, Warren Buffett, Rupert Murdoch, Barry Diller, Michael Eisner, Oprah Winfrey, Robert Johnson, Andy Grove, Richard Parsons, and Donald Keough.

[6] In 2007, Allen was sole advisor to Activision in its $18 billion merger with Vivendi Games.

[11] In 2015, Allen & Co. was the advisor to Time Warner Cable in its $80 billion 2015 merger with Charter Communications,[12] AOL in its acquisition by Verizon,[13] Centene Corporation in its $6.8 billion acquisition of Health Net,[14] and eBay in its separation from PayPal.