Warren Buffett on Tuesday donated about $4 billion to the Bill & Melinda Gates Foundation Trust and four family charities, part of the billionaire’s pledge to give away nearly all of his net worth.
Berkshire Hathaway Inc (BRKa.N), which Buffett has run since 1965, said the donation comprises about 14.4 million of its Class B shares, whose closing price on Tuesday was $277.64.
Actually I think this will cause more demand rather than supply. The reason is that when WEB convert, the BrkB float share, used by index providers for calculating index weights, increases. So they will be changing the weight of Brkb in indices soon, resulting 10-15% of the shares donated being forced bought by ETFs. I think this weight change happens quarterly but could happen sooner if there’s a big change.
On the other hand, the foundation is more likely to sell shares over time.