Subject: Re: 13F out tonight?
BRK share repurchases, if any, since March 31, will become known as total BRK shares outstanding will be disclosed.

The 13-F does not contain shares outstanding information so it will not be possible to work out repurchases from this filing.
I think the next time this information will be accessible via a public filing will be when Buffett makes his annual donation of 5% of outstanding shares on the 1st of July.