Still, Buffett said it was one of about five foreign investments he has made recently.
Mr. Buffett said he and Vice Chairman Charlie Munger continue to hunt for big deals.
"We've really just started but already we've had a terrific response, " Mr Buffett said in a statement.
"We called 70 to 80 people in the Forbes list, " Buffett said during a press call Wednesday.
Buffett said his family members have asked him to step aside should he become physically or mentally impaired.
Berkshire shareholders should expect decent returns on the newspapers the company has bought in recent years, Buffett said.
"Any partnership where I don't have to do the work is my kind of partnership, " Mr. Buffett said.
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Mr Buffett said executives at 3G would be the "operational guys" at Heinz if the deal was finalised.
Right now, the price-to-earnings ratio is a "little above" 20 times, Buffett said.
To learn more about what Buffett said during the meeting, please go to the complete shareholder meeting notes.
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Mr. Buffett said he studied a couple of opportunities, which he didn't name.
With more than 260, 000 employees working for him around the world, something can and will inevitably go wrong, Mr. Buffett said.
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Buffett said low benchmark interest rates, including overnight rates that have been effectively zero since late 2008, can help stimulate demand.
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In a round of interviews on Monday, investor Warren Buffett said the stock market looked "reasonably priced" even after its surge.
Buffett said in the letter that he prefers train carriers to trucking companies because the former is three times more fuel-efficient.
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Warren Buffett said on CNBC this morning that he would indeed tolerate a 28 percent tax rate for his billionaire dollar income.
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"Managements, like the American public, have been adjusting their expectations, " Buffett said.
Buffett said his offer was turned down by one insurer, and he is still waiting to hear back from the other two.
Berkshire's board knows who it would pick as CEO if Buffett died tonight, but the top candidates could change over time, Buffett said.
In a letter dated Monday, Buffett said he planned to give away 12, 050, 000 Class B shares of Berkshire Hathaway stock to five foundations.
"Anytime we see a deal is attractive and it's our kind of business and we've got the money, I'm ready to go, " Buffett said.
"It's our kind of company, " Buffett said in an interview on CNBC, noting its signature ketchup has been around for more than a century.
Mr. Buffett said in his annual letter to shareholders in February that he also expects the pair to help Berkshire's future CEO in making acquisitions.
Mr. Buffett said he doesn't look at sectors to identify stocks.
In his annual letter to Berkshire shareholders in March, Buffett said that the management of the company would be in good hands "should I die tonight".
"The world would know that, one way or the other, the municipal bond insurance problem was behind it, " Buffett said of his plan during a television interview Tuesday.
None other than Warren Buffett said on CNBC this morning that the companies are facing such big losses in the mortgage market that their stock is practically worthless.
However, Mr Buffett said he had reloaded his "elephant gun", a reference to a previous comment in 2011 that he was using such a weapon to look for acquisitions.
Speaking on CNBC Thursday, meantime, Mr. Buffett said he was a fan of the groups management track record. 3G executives will closely monitor day-to-day operations at Heinz, he said.
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Speaking on CNBC, Buffett said Berkshire offered to reinsure the municipal bonds in exchange for a fee equal to 1.5 times the remaining unearned premium over the life of the bonds.
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