Strictly from these sources, AIG would be able to buy about a quarter of its shares at $29/share by September 4th of this year using only the $12.6 billion.
My personal guess is that AIG is more likely to buy at least half of the Treasury stake of 1.08 billion shares, with the rest sold in a public offering by early September. This would assume that the financial markets stabilize by then. Under more difficult financial conditions, this process will take longer.
1. ML III - See earlier posts.
2. AIA - based on AIG ownership of 18.6%, Market Cap of 300 billion HKD, and an exchange rate of 7.76.
3. ILFC value selected based on book value (7,630,639 @ March 2012)