Orion Group Holdings Inc

In addition to the Code of Business Conduct and Ethics, the Company has adopted an additional code of ethics that applies to its senior accounting and financial officers, including the Chief Executive Officer and Chief Financial Officer (“CFO”), as required by the rules of the SEC and Rule 406 of the Sarbanes-Oxley Act of 2002 (the “Officer Code of Ethics”). The Officer Code of Ethics, as well as other governance documents, are available as described below under “Website Availability of Governance Documents.” Any changes in, or waivers to, the Officer Code of Ethics are posted on the Company’s website within four business days and maintained for at least twelve months.