ATCO LTD. — AGM Information 2021

Apr 1, 2021

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NOTICE OF ANNUAL MEETING OF SHARE OWNERS

When

Wednesday, May 12, 2021 10:00 a.m.

Virtual Meeting Via live Webcast Where Online at https://web.lumiagm.com/408712174

Business of the Meeting

The meeting's purpose is to:

1. Receive the consolidated financial statements for the year ended December 31, 2020, including the auditor’s report on the statements

2. Elect the directors

3. Appoint the auditor

4. Transact other business that may properly come before the meeting.

Holders of Class II Voting Shares registered at the close of business on March 23, 2021 are entitled to vote at the meeting. The management proxy circular dated March 8, 2021 includes important information about what the meeting will cover and how to vote.

By order of the Board of Directors

[Signed by Carol Gear]

C. Gear Corporate Secretary Calgary, Alberta March 8, 2021