Company: FSV
Filing Date: 2025-10-31
Form Type: 6-K
Source: 0001171843-25-006853
Chunk: 0

Company: FirstService Corp
Filing Date: 2025-10-31
Form: 6-K
Chunk 0
---
### UNITED STATES
<div align='center'>SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549</div>

#### FORM 6-K
<div align='center'>REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

THE SECURITIES EXCHANGE ACT OF 1934

For the month of: October 2025

Commission file number 001-36897</div>

### FIRSTSERVICE CORPORATION
<div align='center'>(Translation of registrant’s name into English)

1255 Bay Street, Suite 600

Toronto, Ontario, Canada

M5R 2A9

(Address of principal executive office)</div>

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F [ ] Form 40-F [X]

| - 2 - |

#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

| Date: October 31, 2025 |     | FIRSTSERVICE CORPORATION       
 /s/ Jeremy Rakusin             |
|:-----------------------|:----|:-------------------------------|
|                        |     | Name: Jeremy Rakusin           |
|                        |     | Title: Chief Financial Officer |

| - 3 - |

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