Goldman Sachs is buying back their stock from Buffet. Buffet calls the redemption by Goldman Sachs as "unwelcome". And rightfully so. Buffet bought the stock in 2008 while it was incredibly undervalued.. Goldman Sachs is buying it back from Buffet before the stock price gets too high to ever get it back.
Theoretically speaking, would Berkshire Hathaway be able to prevent selling back to Goldman Sachs? Or would there most likely have been a clause that would have forced them to sell to GS whenever they wanted to buy back?
I'm almost certain that GS can buy the shares back no matter what. For one, the deal would have been too painful otherwise; additionally, Berkshire clearly doesn't want to sell.