Summary of Non-Employee Director Compensation, as amended and restated on May 11, 2023

Each non-employee director serving on the Company’s Board of Directors (the “Board”) shall be entitled to receive:

1.Annual Cash Retainer. An annual cash retainer of $80,000 for service on the Board.

2.Committee Membership Fees. A cash retainer, as follows:

a.a non-employee director who is a member of the Audit Committee shall receive an additional annual cash retainer of $12,500;

b.a non-employee director who is a member of the Human Resources & Compensation Committee shall receive an additional annual cash retainer of $10,000; and

c.a non-employee director who is a member of the Nomination and Corporate Governance Committee shall receive an additional annual cash retainer of $7,500.

3.Chair Fees; Lead Director Fee. A cash retainer, as follows:

a.a non-employee director serving as the Lead Director of the Board shall receive an additional annual cash retainer of $35,000;

b.a non-employee director serving as the chair of the Audit Committee shall receive an additional annual cash retainer of $20,000;

c.a non-employee director serving as the chair of the Human Resources & Compensation Committee shall receive an additional annual cash retainer of $17,500;

d.a non-employee director serving as the chair of the Nominating and Corporate Governance Committee will receive an additional annual cash retainer of $15,000;

Directors shall not receive additional fees for attending any Board or committee meetings. The cash retainer fees set forth in Sections 1, 2 and 3 shall be paid quarterly in arrears on March 31, June 30, September 30, and December 31 for each year.

4.Expense Reimbursement. Each director shall be reimbursed for reasonable expenses incurred in connection with attending Board meetings and committee meetings.

5.Equity Retainer. Each director shall receive an annual equity award of deferred share units or restricted stock units with a fair market value equal to $130,000 on the date of the grant, as determined under the Company’s Equity Plan (as defined below). This annual equity grant shall be made on the day of the Company’s annual shareholder meeting as a prospective award (i.e., for the coming year of service). The type of annual equity award granted (i.e., restricted stock units or deferred share units) shall depend on whether the director has met the stock ownership and retention requirements of the Company’s Non-Employee Director Equity Ownership Policy (the “Stock Ownership Policy”) on the applicable date of grant. The restricted stock units and deferred share units will be subject to the terms and condition of the award agreement and Equity Plan.

a.Directors who have satisfied the requirements of the Stock Ownership Policy on the date of grant shall receive an annual grant of restricted stock units. Restricted stock units shall vest on the earlier to occur of (a) the day preceding the next annual shareholder meeting at which directors are elected, or (b) the first anniversary of the grant date, in each case subject to the director’s continued service as a non-employee director or other service provider. If a termination occurs prior to the end of the vesting period due to a voluntary resignation from the board or involuntary removal without cause, a prorated portion of the deferred share units will become vested. If the director’s termination occurs due to death or disability, or a change in control occurs prior to the termination of the director’s service, the deferred share units will become fully vested. Vested restricted stock units granted to non-employee directors shall settle into the Company’s common stock following the earlier to occur of (i) the vesting date, (ii) the director receiving the grant has ceased to serve as a non-employee director on the Board or other service provider due to death, Disability voluntary resignation or removal without Cause (as such terms are defined in the award agreement and Equity Plan), and (iii) a change in control within the parameters of Section 409A of the Internal Revenue Code of 1986, as amended (“Section 409A”).

b.Directors who have not yet satisfied the requirements of the Stock Ownership Policy on the date of grant shall receive an annual grant of deferred share units. Deferred share units shall vest on the earlier to occur of (a) the day preceding the next annual shareholder meeting at which directors are elected, or (b) the first anniversary of the grant date, in each case subject to the director’s continued service as a non-employee director or other service provider. If a termination occurs prior to the end of the vesting period due to a voluntary resignation from the board or involuntary removal without cause, a prorated portion of the deferred share units will become vested. If the director’s termination occurs due to death or disability, or a change in control occurs prior to the termination of the director’s service, the deferred share units will become fully

vested. Vested deferred share units granted to non-employee directors shall settle into the Company’s common stock following the earlier to occur of (i) the director receiving the grant has ceased to serve as a non-employee director on the Board or other service provider and (ii) a change in control within the parameters of Section 409A of the Internal Revenue Code of 1986, as amended (“Section 409A”).

6.Compensation for New Directors. Any new non-employee director who joins the Board will be entitled to prorated compensation, in both cash and equity, for the year in which he or she joins the Board. Such a director’s initial equity award will be valued using the fair market value of a share of the Company’s common stock on the date of his or her appointment to the Board, as determined under the Company’s Equity Plan.

7.Deferral Elections. Non-employees directors may make certain deferral elections of their annual equity grant and/or cash retainer and director fees as follows, subject to the deferral requirements of Section 409a:

a.Non-employee directors receiving an annual equity award of restricted stock units may elect to defer settlement of their annual grant of restricted stock units until the termination of their Board service or a specified date.

b.Non-employee directors may also elect to convert all or a portion of their annual cash retainers, committee fees and chair fees into fully-vested restricted stock units using the fair market value of a share of the Company’s common stock (as determined under the Company’s Equity Plan) and defer settlement of such restricted stock units until the termination of their Board service or a specified date.

8.Omnibus Equity Incentive Plan. Deferred share units and restricted stock units for non-employee directors shall be granted under the SiteOne Landscape Supply, Inc. 2020 Omnibus Equity Incentive Plan, or a successor plan (the “Equity Plan”).