OMAHA, Neb. (
will be added to
Burlington Northern Santa Fe
, the company Berkshire is acquiring.
The announcement, widely expected, follows the 50-to-1 stock split of Berkshire's Class B shares that was approved by shareholders last week. The stock split gave Berkshire enough liquidity to meet S&P's standards.
Berkshire will account for about 1.1% of S&P 500's overall market cap, S&P senior index analyst Howard Silverblatt told the
Wall Street Journal
Burlington shareholders are expected to vote on the
in the first few weeks of February.
Berkshire's Class B shares rose $5.59, or 8.2%, to $73.59 in after-hours trading Tuesday.