Filing Details

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549   SCHEDULE 13D/A

Under the Securities Exchange Act of 1934 (Amendment No. 1)*

Atwood Oceanics, Inc.

(Name of Issuer)

Common Shares, par value $1.00 per share

(Title of Class of Securities)

050095108

(CUSIP Number)

Mr. Rune Magnus Lundetrae Klingenberggata 4 0160 Oslo, Norway +47 22 48 30 00

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

October 6, 2017

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), Rule 13d-1(f) or Rule 13d-1(g), check the following box. [   ]   Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d–7 for other parties to whom copies are to be sent.

CUSIP No.

050095108

Name		Position of Officer or Director		Principal Occupation or Employment		Principal Business Address and Citizenship
Tor Olav Troim		Chairman of the Board		Director of Golar LNG Limited and Chairman of the Board of Directors of Golar LNG Partners LP		Apt 8, 21 Manresa Road, London SW36LZ. Mr. Troim is a Norwegian citizen.
Jan Rask		Director		Investor		2727 Kirby Drive, Unit 11K, Houston, Texas, USA. Mr. Rask is a United States citizen.
Fredrik Halvorsen		Director		Founder of Ubon Partners AS, a private investment company		Langoddveien 86 A, 1367 Snarøya, Norway. Mr. Halvorsen is a Norwegian citizen.
Simon Johnson		Chief Executive Officer				Apartment 2304, Al Marsa Street, Dubai Marina Dubai. Mr. Johnson is an Australian citizen.
Rune Magnus Lundetrae		Deputy Chief Executive Officer and Chief Financial Officer				Draumkvædestien 2B, 4021 Stavanger, Norway. Mr. Lundetrae is a Norwegian citizen.
Svend Anton Maier		Chief Operating Officer				Admiral Cruys gate 25, 4012 Stavanger, Norway. Mr. Maier is a Norwegian citizen.

ITEM 3.

Source and Amount of Funds or Other Consideration.

There are no material changes to Item 3 from the Original Schedule 13D.

ITEM 4.

Purpose of Transaction.

On October 6, 2017 (the "Closing Date"), pursuant to that certain Agreement and Plan of Merger dated May 29, 2017, by and among the Issuer, Ensco plc, a public limited company organized under the Laws of England and Wales ("Ensco") and Echo Merger Sub LLC, a Texas limited liability company and wholly owned subsidiary of Ensco ("Merger Sub"), (i) Merger Sub merged with and into the Issuer (the "Merger"), with the Issuer surviving in the Merger as a wholly-owned subsidiary of Ensco and (ii) each Common Share of the Issuer was converted into 1.60 Class A ordinary shares, nominal value $0.10 per share, of Ensco upon the time when the Merger became effective on the Closing Date (the "Effective Time").

ITEM 5.

Interest in Securities of the Issuer.

(a)          As of the Effective Time, the Reporting Person was no longer deemed to beneficially own any Common Shares of the Issuer.

(b)          N/A.

(c)          Except as described in the Original Schedule 13D, the following table sets forth the transactions by the Reporting Person in the Common Shares during the past sixty (60) days.

(d)          N/A

(e)          The Reporting Person ceased to be a beneficial owner of more than five percent of the Common Shares as of the Effective Time.

ITEM 6.

Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.

ITEM 7.

Materials to be Filed as Exhibits.

Signature

After reasonable inquiry and to the best of my knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

Dated: October 10, 2017