Subject: Re: End of day activity
Not long after the 4PM close it traded $3 per share higher than the close, finishing AH close to that higher price.

Since the holders of BRKB options can decide later than 4pm (I think till 5:30 pm) whether or not to exercise their options, those holding 495 strike calls are actually in the money and will exercise those options, or their broker will automatically exercise them.