Apollo Global Management (NYSE: APO) is preparing to take the home-security company ADT public before the year is done, the Wall Street Journal reported.

Apollo could file IPO paperwork with the Securities and Exchange Commission by the fall and list shares by the end of the year. Insiders said the IPO could value ADT at well over $15 billion, making it one of the largest IPOs of 2017.

The private equity firm bought ADT for $6.9 billion in Feb. 2016. It had previously merged acquisitions Protection 1 and ASG Security to fund the ADT buyout.

There's no guarantee of a listing, but Apollo's decision to prepare ADT for a sale so soon after buying it suggests the investment could be lucrative.

Apollo stock was up over 1% in early afternoon trading.