Buffett donates $1 bn. He has estate-planning advice for everyone.

Buffett's huge position in Berkshire means a rapid selling of his stock could jolt the share price

- Karen Langley

At age 94, Warren Buffett is reflecting on life, wealth, and mortality. The legendary investor's company, Berkshire Hathaway, said Monday that Buffett will again give a portion of his Berkshire shares, in this case worth about $1.15 billion, to four family foundations.

The donations leave him holding 206,363 Class A shares worth about $148 billion. As he did last November, Buffett is converting 1,600 Class A shares into 2.4 million Class B shares, which hold less voting rights, before donating them to the Susan Thompson Buffett Foundation, named for his late first wife, and to foundations led by his children.

The Thanksgiving-time donations supplement annual gifts to the four foundations, as well as to the Bill & Melinda Gates Foundation, that Buffett has made since 2006, when he unveiled plans to make major gifts throughout his lifetime.