The insurance titan released its 3rd-quarter portfolio update, revealing new buys in a pizza chain company and a pool supplies company.

Warren Buffett's Berkshire Hathaway took a bite of Domino's Pizza and waded into the swimming pool business even as it pared several much larger bets.

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.

Shares of Domino's Pizza jumped premarket after Warren Buffett’s Berkshire Hathaway disclosed a new position in the chain. The investment conglomerate also took a stake in Pool Corp., and cut its position in Ulta Beauty.

Warren Buffett's Berkshire Hathaway took stakes in Domino's Pizza and swimming pool supplier Pool Corp. in the third quarter while continuing to trim stakes in longtime holdings Apple and Bank of America.

Berkshire Hathaway initiated these new positions during the third quarter even as it cut back its holdings of big names like Apple and Bank of America.

Warren Buffett’s Berkshire Hathaway made bold moves in the third quarter, adding stakes in Domino’s Pizza and Pool Corp., while continuing to shed holdings in Apple and Bank of America. Domino’s Pizza and Pool Corp. shares, worth $550 million and $152 million respectively, surged in after-hours trading following the announcement.

Berkshire's newfound craving for Domino's translated into a 1.28 million share stake worth approximately $549 million as of September 30th.

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.