Blue Coat’s plan to go public was short-lived. Ten days after filing for its IPO, the security company agreed to be acquired by Symantec in a $4.65 billion cash deal.

The deal, announced Sunday evening, is due to close by Sept. 30 and would have Blue Coat CEO Greg Clark becoming CEO of Symantec. Symantec announced in April that it would be seeking a successor for current CEO Mike Brown.

The addition of Blue Coat, which touts itself as a leader in enterprise web security, would cement publicly traded Symantec's identity as a pure security company. Symantec already moved in that direction last year by selling Veritas, its data-backup business, to The Carlyle Group for $8 billion in cash.

Symantec said it would issue 2.8 billion in new debt to help finance the Blue Coat purchase.

In addition, Bain Capital — which acquired Blue Coat from investment firm Thoma Bravo last year for $2.4 billion — would invest $750 million in the combined company. Private equity firm Silver Lake, which already has a $500 million investment in Symantec, would also invest an additional $500 million.

Formerly public, Blue Coat was acquired by Thoma Bravo in 2012 for $1.3 billion. The company has been unprofitable, recording losses of $289 million on revenues of $598 million for the year ended April 30.

For the previous year, Blue Coat had reported losses of $48 million, or 49 cents per share, on revenues of $631 million.

In addition to the losses, you might notice that revenues actually declined during the past year. Blue Coat's IPO filing says the Bain acquisition forced the company to write down its deferred revenues. Minus those adjustments, revenues would have been $755 million for the most recent fiscal year.