February 23, 2021 – Toronto, Ontario – Greenbrook TMS Inc. (TSX: GTMS) (“Greenbrook” or the “Company”), will release its 2020 fourth quarter and year end operational and financial results after market hours on March 30, 2021.

Fourth Quarter 2020 Conference Call Details:

Bill Leonard, President and Chief Executive Officer, will host a conference call at 10:00 a.m. (Eastern Time) on March 31, 2021 to discuss the financial results for the quarter.

Dial in Numbers:

Toll Free North America: (866) 521-4909

Toronto: (647) 427-2311

Webcast:

For more information or to listen to the call via webcast, please visit: www.greenbrooktms.com/investors/events.htm

For those that plan on accessing the conference call or webcast, please allow ample time prior to the call time.

Conference Call Replay:

Toll Free (North America): (800) 585-8367

Toronto: (416) 621-4642

Conference ID: 6797231

The conference call replay will be available from 1:00 p.m. ET on March 31, 2021, until 11:59

p.m. ET on April 30, 2021.

About Greenbrook TMS Inc.

Operating through 126 Company-operated treatment centers, Greenbrook is a leading provider of Transcranial Magnetic Stimulation (“TMS”) therapy, an FDA-cleared, non-invasive therapy for the treatment of Major Depressive Disorder and other mental health disorders, in the United States. TMS therapy provides local electromagnetic stimulation to specific brain regions known to be directly associated with mood regulation. Greenbrook has provided more than 510,000 TMS treatments to over 14,000 patients struggling with depression.

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For further information please contact:

Glen Akselrod Investor Relations Greenbrook TMS Inc.

Contact Information: investorrelations@greenbrooktms.com 1-855-797-4867