Domino’s Pizza shares jumped nearly 8% in extended trading on Thursday after a filing revealed that Warren Buffett’s Berkshire Hathaway had taken a stake in the world’s largest pizza chain. Monitor these important chart levels.

Domino’s is the only sizable new equity holding by Berkshire in the period. Domino’s shares are rising in after-market activity in an apparent reaction to the Berkshire news.

Warren Buffett's Berkshire Hathaway said on Thursday it made new investments in Domino's Pizza and Pool Corp in the third quarter, even as it retrenched from stocks such as Apple and Bank of America.