Warren Buffett has made his scheduled annual donation of Berkshire Hathaway stock to the Bill and Melinda Gates Foundation.

After six years, Buffett has donated a total of 132.4 million Berkshire Class B shares, worth $10.3 billion at today's closing price of $77.77 .. or $9.5 billion if you use the stock price on the date of each donation.

The Foundation reportsit still holds just under 101 million shares, now worth more than $7.8 billion.

This year's installment is just over 19 million shares of Baby Berkshires, worth $1,504,423,593 at the close.

That's 6.3 percent less than the value of last year's gift on the day it was made.  Each year, Buffett donates fewer shares, and the stock is down 1.3 percent over the past 12 months.

In a 2006 letter to Microsoft's Chairman and his wife, Buffett outlined a long-term schedule that has him donating five percent fewer shares each July, when compared to the previous year.

Current Berkshire stock prices:

Class B:

Class A:

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