Brought Parker in as Facebook's founding president in 2004; their relationship continued informally after Parker's 2005 resignation and was central to Parker's later wealth via his equity stake.

Timeframe: 2004-present

Fanning wrote Napster's core software while Parker drove the business side; they later reunited for Airtime in 2011-2014.

Timeframe: 1997-2000, reunited 2011-2014

Provided Facebook's first outside investment ($500,000 in 2004) after Parker brokered the introduction, then brought Parker into Founders Fund as a managing partner in 2006, and later backed the board's decision to have Parker step down as Facebook president in 2005.

Timeframe: 2004-2014

Received a cold email from Parker in 2009; Parker went on to invest $15 million via Founders Fund, join the board, and personally negotiate the U.S. label deals that enabled Spotify's 2011 U.S. launch, eventually netting Parker roughly $1.5 billion at Spotify's 2018 direct listing.

Timeframe: 2009-2018

As Plaxo's lead Sequoia investor, backed the 2004 board decision to fire Parker, creating a grudge against Sequoia that directly shaped Parker's decision to bring in Peter Thiel rather than Sequoia for Facebook's first investment.

Timeframe: 2002-2004