A euphemism for the insurance/railroad/utility/vacuum cleaner conglomerate Berkshire Hathaway.
Ted and Todd are Ted Weschler and Todd Combs, portfolio managers at Berkshire. Used especially to refer to Berkshire in the future, after Ted and Todd assume all duties from their predecessors Warren Buffet and Charlie Munger.
Then again, Sir. Martin (terrifyingly) said that he thought Ted and Todd's excellent adventure might turn out more like Loews after dad retired...