Exhibit 99.5
JOINT FILING AGREEMENT
Pursuant to Rule 13(d)-1(k)(l) under the Securities Exchange Act of 1934, the undersigned hereby agree that only one statement containing the information required by Schedule 13D needs to be filed with respect to the ownership by each of the undersigned of the common shares of Greenbrook TMS Inc.
Dated: October 2, 2023
| GREYBROOK HEALTH INC. | |||
| By: | /s/ Sasha Cucuz | ||
| Name: | Sasha Cucuz | ||
| Title | Director | ||
| THE VAMVAKAS FAMILY TRUST (2015) | |||
| By: | /s/ Sasha Cucuz | ||
| Name: | Sasha Cucuz | ||
| Title | Trustee | ||
| By: | /s/ Shawn Walsh | ||
| Name: | Shawn Walsh | ||
| Title | Trustee | ||
