Stamps.com Agrees to Thoma Bravo Buyout in $6.6 Billion Deal (1)

Stamps.com Inc., the online postage company, has agreed to be acquired for $6.6 billion in cash by private equity firm Thoma Bravo.

The purchase price of $330 a share is a 67% premium to Stamps.com’s Thursday closing price, the companies said in a statement Friday. The stock had stalled so far this year, with a 0.8% gain, but surged 135% last year.

Stamps.com shares jumped as much as 64% to $323.62 in New York trading Friday.

The deal includes a 40-day “go-shop” agreement allowing Stamps.com to seek a higher offer, the companies said.

Thoma Bravo has carved out ...