The 13-F is the quarterly SEC filing that forces large institutional managers to disclose their equity positions as of a specific date. There is a lag between when those holdings are recorded and when the filing becomes public, and every number in the document reflects that gap. Friday's filing from Berkshire Hathaway showed the conglomerate held approximately 106 million shares of Alphabet, the parent company of Google, valued at $37.9 billion at the end of June. By that measure, Alphabet now ranks among Berkshire's three largest equity holdings.
A top-three position in a portfolio of Berkshire's scale represents a meaningful concentration. The $37.9 billion valuation at quarter-end is the number the regulatory filing confirms. Whether the stake has been added to or trimmed in the period between June's end and Friday's disclosure is a question a 13-F cannot answer. Berkshire included no commentary in the filing on the rationale for the allocation.
The same document shows the firm also increased its positions in Delta Air Lines and in housing-related equities during the period covered. The filing provides no share counts or dollar values for those positions.
The Alphabet stake at $37.9 billion, and the top-three ranking the filing assigns to it, describe Berkshire's position as of the end of June. The filing was released Friday.