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

ATWOOD OCEANICS, INC.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

050095108

(CUSIP Number)

April 3, 2017

(Date of Event which Requires Filing of this Statement)

Item 1.

Atwood Oceanics, Inc.

15011 Katy Freeway

Suite 800

Houston, TX 77094

Item 2.

(a)

Name of Person Filing:

Arrowstreet Capital, Limited Partnership (“ASC”)

Arrowstreet Capital Holding LLC (“ACH”)

(b)

Address of Principal Business Office or, if None, Residence:

The address of each reporting person is:

200 Clarendon Street, 30^th Floor

Boston, MA 02116

(c)

Citizenship:

ASC:  Massachusetts limited partnership

ACH:  Delaware limited liability company

(d)

Title and Class of Securities:

This Schedule 13G report relates to the common stock (the “Common Stock”) of Atwood Oceanics, Inc. (the “Issuer”).

(e)

CUSIP No.:

Item 3.

If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

[_]     Broker or dealer registered under Section 15 of the Act;

[_]     Bank as defined in Section 3(a)(6) of the Act;

[_]     Insurance company as defined in Section 3(a)(19) of the Act;

[_]     Investment company registered under Section 8 of the Investment Company Act of 1940;

[X]     An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);

[_]     An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);

[X]     A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);

[_]     A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

[_]     A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940;

[_]     A non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J);

[_]     Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 240.13d-1(b)(1)(ii)(J),

          please specify the type of institution: ____

Ownership

(a)

Amount Beneficially Owned:

3,171,226

ASC:    3.9%

ACH:   3.9%

(iii)  Sole power to  dispose or to direct the disposition of:

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.