Apple's shares gained 10.6 % in the period ended September 30

Berkshire cut its holdings in the iPhone maker by roughly 25% in the period, after slashing it by almost half in the second quarter.

Apple shares are in the spotlight Monday following news that Berkshire Hathaway once again trimmed its stake in the tech giant. Monitor these important chart levels.

Warren Buffett has further lowered his stake in tech giant Apple, downsizing Berkshire Hathaway's biggest equity holding for a fourth consecutive quarter.