IAC/InterActive Corp. has significantly increased its stake in Front Line, the mega management firm headed by Irving Azoff and Howard Kaufman, Billboard.biz has confirmed.

Speculation regarding Front Line's future ownership make-up has been rampant for more than a year and different stakeholders -- including minority owner Warner Music Group -- were believed to be vying for an increased share of the management powerhouse. Along with WMG, it is believed promoter Live Nation also made a run at acquiring a large stake.

Front Line currently operates as a combination of wholly owned companies and partnerships. Azoff and Kaufman began rolling up management companies in 2005, funded in part by stakeholders and initial Front Line backers Thomas H. Lee and Bain Capital Partners. Now Lee and Bain are out and Ticketmaster parent company IAC has increased its stake.

As of now, the Front Line team of managers includes Azoff, Kaufman, Scott Siman, Simon Renshaw, Craig Fruin, Clarence Spalding, Paul Geary, Jared Paul, John Baruck, Jason Morey, Brian Doyle, Andy Gould, Alejandro Asensi, Tom Consolo, and Allison Azoff.

The client list and responsible managers includes the Eagles, Christina Aguilera, and Neil Diamond (Irving Azoff), Jimmy Buffett and Aerosmith (Kaufman), Tim McGraw (Siman), Dixie Chicks (Renshaw), Alan Jackson (Craig Fruin), Brooks & Dunn, Pat Green and Jason Aldean (Spalding), Smashing Pumpkins and Godsmack (Geary and Paul), Journey, Velvet Revolver and Clint Black (Baruck), Mylie Cyrus (Morey), Hall & Oates(Doyle), Rob Zombie (Gould), Luis Miguel and Jennifer Lopez (Asensi), REO Speedwagon and Jewel (Consolo), Seal (Allison Azoff).

The IAC deal is the first of several transactions that will restructure the company, the source says. Senior management, including Azoff and Kaufman, will "remain in control," and the company will continue to grow as an independent, privately-held company. More management company acquisitions are expected, including two that may be finalized as soon as this week, the source says.