Foreign owner ship is limited to 49 percent of the airline and 25 percent of the voting shares of stock.
Don't look for that to change as the airlines are an integral part of the national defense of the USA because of the CRAF (Civil Reserve Airfleet) All the major airlines are flying (still) dozens of military flights a month to the Middle east.
Any hope of changing the foreign ownership rules died with France's anti US stance leading up to the Iraq war. They will never take the chance of foreign controll of our prime method of moving troops now...
Cheers
Wino