American businessman Stan Kroenke is increasing his stake in Premier League club Arsenal, edging closer to a full takeover.The Gunners announced Thursday that Kroenke has spent $1.2 million buying 90 shares to increase his holding from 28.7 to 28.9 percent.That's just short of the 30 percent threshold that would trigger a mandatory offer for the remaining shares.The 62-year-old Kroenke, who also owns Major League Soccer's Colorado Rapids, has been praised as a "model owner" by Arsenal chief executive Ivan Gazidis.