SAN FRANCISCO (MarketWatch) -- Facebook Inc. FB, +1.93% Chief Executive Mark Zuckerberg has sold 30.2 million shares and director Peter Thiel has sold 16.8 million shares of the social-networking company, according to securities filings published late Tuesday. The sales confirm plans detailed in a prospectus before Friday's $16 billion IPO. Zuckerberg sold 30.2 million shares at a price of $37.58 for gross proceeds of $1.13 billion; Thiel sold 16.8 million shares for gross proceeds of $633 million. Facebook insiders had told prospective shareholders of their plans in an S-1 filing last week. Facebook FB, +1.93% shares were down 0.8% after hours at $30.74.