Stocks post-lock-up decline was second biggest since January 2011.

Stocks post-lock-up decline was second biggest since January 2011.

Company will revamp its board, in a victory for activist investor Loeb.

Company will revamp its board, in a victory for activist investor Loeb.

Plan ensures founders control of company, cuts shareholders out of the loop.

Plan ensures founders control of company, cuts shareholders out of the loop.

Decision would confirm exchange's role as venue for biggest tech companies.

Decision would confirm exchange's role as venue for biggest tech companies.