Former Microsoft CEO, and current LA Clippers owner, Steve Ballmer surprised his followers last night when he announced on Twitter that he had bought a 4 percent stake in the social networking company. The unverified and rarely used Twitter account was initially dismissed as a fake, but according to The New York Times it really is Ballmer.

A 4 percent stake makes Ballmer one of Twitter's biggest shareholders. By comparison, co-founder and CEO Jack Dorsey only owns 3.2 percent of the company. Co-founder Even Williams is currently the largest shareholder at 6.9 percent.

Ballmer also took the opportunity to praise Moments, a new Twitter feature design to highlight popular tweets, photos, videos and GIFs grouped around popular stories and hashtags. Shortly following its launch, the company also announced plans to cut roughly eight percent of its employees, while promising a nimbler team and more new products in the future.