Confidential Reporting Hotline

Diamond Offshore is committed to serving our customers in the offshore drilling market in compliance with the laws and regulations that govern our business and in accordance with the highest ethical standards. In doing so, we must maintain the highest level of integrity regarding health and safety practices, environmental protection and compliance with applicable law.

The Company has established the following policy and procedures for (a) the receipt, retention and treatment of complaints regarding accounting, internal accounting controls or auditing matters, and (b) the confidential, anonymous submission by employees of the Company and its subsidiaries and other parties of concerns regarding questionable accounting or  auditing  matters or suspected illegal conduct, unsafe conditions or violations of the Company’s Code of Business Conduct and Ethics.

Any person wishing to communicate concerns, including a confidential or anonymous complaint, may do so in the following ways:

- By submitting the complaint in writing addressed to:
Chairman of the Audit Committee
c/o General CounselDiamond Offshore Drilling, Inc.
15415 Katy Freeway
Houston, Texas 77094

- By contacting the Company’s complaint hotline in any of the following ways:
Phone: (800) 461-9330.
If dialing internationally, enter the toll-free number assigned to the country from where the call is being placed using this list.

- Text: (281) 688-1293 (available in North America only)

- By submitting the complaint online at

The Company’s General Counsel will review all complaints received. Complaints that relate to accounting, internal accounting controls or auditing matters will be promptly forwarded to the Chairman of the Audit Committee. All complaints received by the Audit Committee will be carefully reviewed and, to the extent the Audit Committee deems necessary, investigated under the Audit Committee’s supervision. Appropriate corrective action will be taken as warranted in the judgment of the Audit Committee.

If an employee submits information in compliance with this policy in good faith through the phone or website hotline on a confidential, anonymous basis, in general the Company will not attempt to discover the employee's identity except if required under applicable law or stock exchange rules.

Employees who have a complaint or concern regarding the behavior of other Company employees or general workplace or employee issues should first submit their concern or complaint to their manager or to the manager in charge of Human Resources at their work location or business unit. If the complaint or concern regards the employee’s manager and also the applicable Human Resources manager, the employee should contact the next appropriate manager. If an employee’s complaint or concern is about the Company’s senior management, or if the employee believes in good faith that their complaint has not been handled to their satisfaction after following the above process, then the complaint hotline may be utilized as described in this policy.

Any employee who makes a false or unsubstantiated complaint in bad faith or who abuses the complaint hotline will be subject to company discipline, up to and including termination of employment.

The Company will protect, to the fullest extent possible, the confidentiality and anonymity of any employee submitting a complaint or concern in good faith regarding any of the foregoing matters, and of any employee involved in an investigation of a complaint or concern of this nature, subject to applicable law and stock exchange rules.

The Company will not discharge, demote, suspend, threaten, harass or in any manner discriminate or retaliate against any employee in the terms and conditions of employment based upon any lawful actions of such employee with respect to good faith reporting of complaints regarding accounting or auditing matters.