Keep in mind how many shares he still has. From the link:
"Berkshire (ticker: BRKB ) subsidiaries sold 13 million Delta (DAL) ...Berkshire now has overall ownership of 58.9 million Delta shares"
"Buffett’s firm also sold 2.3 million Southwest shares (LUV) ... Berkshire now owns 51.3 million Southwest shares"
So selling 2.3 million out of 53.6 million and 13 million out of 71.9 doesn't exactly imply that he thinks his position is going to 0 in bankruptcy. The LUV sale was extremely small and looks like he might have been trying to stay under some ownership limit.
"Berkshire (ticker: BRKB ) subsidiaries sold 13 million Delta (DAL) ...Berkshire now has overall ownership of 58.9 million Delta shares"
"Buffett’s firm also sold 2.3 million Southwest shares (LUV) ... Berkshire now owns 51.3 million Southwest shares"
So selling 2.3 million out of 53.6 million and 13 million out of 71.9 doesn't exactly imply that he thinks his position is going to 0 in bankruptcy. The LUV sale was extremely small and looks like he might have been trying to stay under some ownership limit.