As an entrepreneur and investor, either Reid Hoffman or the venture firm Greylock Partners, where he is a general partner, have the following relationships with companies mentioned in this book:
Airbnb: Greylock portfolio company; investor and board observer
Cloudera: Greylock portfolio company
Dropbox: Greylock portfolio company
Facebook: Greylock portfolio company; personal investment
Friendster: personal investment
Gladly: Greylock portfolio company
Greylock Partners: general partner
Groupon: Greylock portfolio company
Instagram: Greylock portfolio company
LinkedIn: cofounder, Greylock portfolio company
Medium: Greylock portfolio company
Microsoft: board member
Mozilla: former board member
Nextdoor: Greylock portfolio company
Pandora: Greylock portfolio company
PayPal: founding board member and executive
Pure Storage: Greylock portfolio company
Red Hat: Greylock portfolio company
SocialNet: cofounder
Tumblr: Greylock portfolio company
Zynga: former board member; personal investment