Take a look at some of Thursday morning's early movers:

Chevron — The oil giant warned that its fourth-quarter profits will be “significantly below” those of the prior quarter, blaming lower profit margins and refinery input volumes.

PVH Corp. — The clothing maker is raising its fourth-quarter guidance on the strength of its Calvin Klein and Tommy Hilfiger clothing brands.

Monster Worldwide — The online provider of job listings has declared a two-for-one stock split.

Validus and XL Group — Both reinsurers say they will record quarterly losses due to the impact of the Thailand floods.

CA Inc. — Private equity firm Taconic Capital Advisors has disclosed a 5.1 percent stake in the software company formerly known as Computer Associates.

Regions Financial — The bank has struck a deal to sell its Morgan Keegan asset management unit to Raymond James Financial for $930 million.

Diamond Foods — The Wall Street Journal reports that the top two shareholders in the company have sold the bulk of their holdings.

Williams Sonoma — The retailer cut its fourth-quarter guidance as holiday season discounting hurt revenues. The company now expects quarterly profit of $1.10 to $1.15 per share, down from the prior guidance of $1.15 to $1.20 and Street estimates of $1.19.

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