Stock splits are an interesting discussion. Other than psychological differences, a split really only increase liquidity and encourage more small investors but it also encourages more short term speculation. Berkshire is happy to continue to cater to the highest class of long term investors with the added benefit of being noted as the highest priced stock in the NYSE. Although, they did recently do a large split of their class B stock to allow more trading and to be included in the S&P 500.