13G Filing: Arrowstreet Capital and Atwood Oceanics Inc (NYSE:ATW)

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X].

Item 6.

Ownership of more than Five Percent on Behalf of Another Person.

This Schedule is filed by ASC, in its capacity as investment adviser to a number of its clients, and by ACH, the ultimate parent company of ASC. The securities to which this Schedule relates are held by clients of ASC. Those clients have the right to receive, and/or the power to direct the receipt of, dividends from, or the proceeds from the sale of, such securities. No such client is known by ASC or ACH to have such right or power with respect to more than five percent of this class of securities.

Item 7.

Identification and classification of the subsidiary which acquired the security being reported on by the parent holding company or control person.

Not applicable.

Item 8.

Identification and classification of members of the group.

Not applicable.

Item 9.

Notice of Dissolution of Group.

Not applicable.

Item 10.

Certifications.