New York (AFP) - Shares in US investment star Warren Buffett's Berkshire Hathaway group topped $200,000 apiece for the first time Thursday, less than eight years after breaking the $100,000 barrier.

Already the priciest on US markets, Berkshire shares got even more expensive for investors in a 7.5 percent climb since the company announced record quarterly earnings at the start of August.

At the close of trade Berkshire A shares were up $3,500, or 1.8 percent, to $202,850.00.

Buffett has become a legend for the performance of Berkshire, which has a large number of majority and minority investments in everything from small jewelry and furniture retailers to insurance giants Geico and General Re, chemicals group Lubrizol, Coca-Cola, IBM, American Express, Wells Fargo Bank and dozens of others.

The company's long-term gains have made Buffett the world's third wealthiest man, his fortune worth $65.9 billion, according to Forbes magazine.

After crossing the $100,000 line in October 2006, Berkshire shares have easily outperformed gauges like the S&P 500 broad-market index, up only 43 percent since then, further burnishing Buffett's star as the "Oracle of Omaha," the Nebraska city where he lives.

S&P Dow Jones index analyst Howard Silverblatt rued not having bought Berkshire shares early on.

"Warren has returned 22.6 percent per year compounded since it crossed $100 in May 1977 -- the month I started at S&P," Silverblatt said.

"I should have indexed my pay check against it -- I would be making almost half-a-million dollars a week."

But the company's future remains under a huge question mark, of who will replace Buffett, 83. He has not said when he will retire but regularly says a solid succession plan has been mapped out.

To make the shares more accessible to small investors, Berkshire created a second class in 1996 when the A shares rose to around $33,000 each. The B shares, labeled "Baby Berkshires" at the time, went out at just $1,000.

Eventually they grew out of reach of small market players, and underwent a 50-to-1 split in 2010, a move also made to help the company finalize its takeover of Burlington Northern Santa Fe railroad.

On Thursday the B shares finished up 1.7 percent at $135.30.