Exhibit 23.1
KPMG LLP
PO Box 10426 777 Dunsmuir Street
Vancouver BC V7Y 1K3
Canada
Telephone (604) 691-3000
Fax (604) 691-3031
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
The Board of Directors
Atlas Corp.
We consent to the use of our reports dated March 25, 2019, with respect to the consolidated balance sheets of Seaspan Corporation (the “Company”) as of December 31, 2018 and 2017, and the related consolidated statements of operations, comprehensive income (loss), puttable preferred shares and shareholders’ equity and cash flows for each of the years in the three year period ended December 31, 2018, and the related notes, (collectively, the “consolidated financial statements”), and the effectiveness of internal control over financial reporting as of December 31, 2018, incorporated by reference, in the Post-Effective Amendment No. 1 to FormF-3 (RegistrationNo. 333-229312) filed by Atlas Corp. We also consent to the reference to our firm under the heading “Experts” in the FormF-3 (RegistrationNo. 333-229312) as amended by the Post-Effective Amendment No. 1.
Our report dated March 25, 2019 in connection with the consolidated financial statements of the Company refers to the prospective change in the Company’s method of accounting for acquisitions in the year ended December 31, 2018 due to the adoption of Accounting Standards Update2017-01, “Clarifying the Definition of a Business”.
Chartered Professional Accountants
February 27, 2020
Vancouver, Canada
KPMG LLP is a Canadian limited liability partnership and a member firm of the KPMG network of
independent member firms affiliated with KPMG International Cooperative (“KPMG International”), a
Swiss entity. KPMG Canada provides services to KPMG LLP.