Warren Buffett’s Berkshire Hathaway

revealed a new position in Alphabet

, making the Google parent the conglomerate’s 10th largest equity holding at the end of September, according to a regulatory filing.

Berkshire disclosed a $4.3 billion stake in Alphabet at the end of the third quarter, a surprising move given Buffett’s traditional value investing philosophy and reluctance toward high-growth, tech names. While Berkshire has owned Apple

for years, Buffett has called it more of a consumer products company than a pure tech play.