Executive Supplemental Stock Option Program Enrollment Form

Roku, Inc. (“Roku”) believes in providing its employees at the stock level of CEO and Senior Vice President (“SVP”) (each, an “Executive”) with a choice as to how their compensation is structured. For calendar year [_____]3, Roku is offering you the opportunity to enroll in the Executive Supplemental Stock Option Program (the “Program”) pursuant to which you can elect to reduce your Eligible Cash Compensation (as noted below and as defined on Appendix A) in exchange for the grant of vested stock options under Roku’s 2017 Equity Incentive Plan (the “2017 Plan”).

The terms and conditions of the Program are described in Appendix A to this Enrollment Form. A general summary of the terms of stock options is included in Appendix B. Such summary is meant to be general only. It is ultimately your responsibility to review the terms of your stock options as set forth in the 2017 Plan and the applicable stock option notice(s) and agreement(s). If there is a difference between the terms of this Enrollment Form, including its appendices, and the 2017 Plan or the applicable stock option notice(s) and agreement(s), the 2017 Plan and the applicable stock option notice(s) and agreement(s) will govern. It is ultimately your responsibility to consult your personal tax or financial planning advisor about the tax and financial consequences of your election.

        Annual Cash Compensation:        «Annual_Cash_Amount»

        Eligible Cash Compensation:         «Eligible_Cash_Comp_Amount»

☐     I hereby enroll in the Program and elect to reduce my Eligible Cash Compensation by $_____________ (the “Stock Option Allocation Amount”) in exchange for the grant of stock options pursuant to the terms of the Program.

☐     I hereby elect not to enroll in the Program.

Your election is irrevocable following the Deadline (as defined below), except as otherwise expressly provided in Appendix A to this Enrollment Form.

Please return the signed Enrollment Form to the Compensation Team at Roku by no later than 1:00 pm PST on [Day of the Week], [Month] [Day], [Year]4 (the “Deadline”). Your failure to return the signed Enrollment Form by the Deadline will be treated by Roku as your election not to enroll in the Program (i.e., your Annual Cash Compensation will not be reduced in exchange for the grant of stock options).

This Appendix A, which is part of the Enrollment Form, contains the terms and conditions of your participation in the Program. Capitalized terms used but not defined herein shall have the same meanings assigned to them in the 2017 Plan.

If you enroll in the Program, the dollar amount of your Eligible Cash Compensation will be reduced by an amount you elect (the “Stock Option Allocation Amount”) in exchange for the grant of vested stock options on a monthly basis. Your Eligible Cash Compensation is your gross annualized base salary expected to be paid in calendar year [_____]5 (your “Annual Cash Compensation”) less $[_____]6. In other words, you must take a minimum of $[_____]7 in annual base salary (payable in the amount of $[_____]8 each bi-weekly payroll period, less applicable taxes and deductions). Eligible Cash Compensation does not include any bonus payments, reimbursement for expenses or other one time and/or extraordinary cash or other compensatory payments.

Your enrollment in the Program will reduce the amount of your gross, before-tax, Annual Cash Compensation by the amount of your Stock Option Allocation Amount, resulting in an amount we refer to as your “Adjusted Annual Cash Compensation.” The bi-weekly pay period portion of the Stock Option Allocation Amount you select will not be deducted from each paycheck and will not appear as a line-item on your paystub.

For example, if your annual base salary is $500,000 and you elect a Stock Option Allocation Amount of $[_____]9 ($500,000 - $[_____]10):

Annual Cash Compensation: $500,000

Eligible Cash Compensation: $[_____]11

Stock Option Allocation Amount: $[_____]12

Adjusted Annual Cash Compensation: $[_____]13

Any Roku benefits that are normally determined based on your Annual Cash Compensation and/or deducted from each pay period will now be determined based on your Adjusted Annual Cash Compensation. For example, if you participate in Roku’s 401(k) plan, the calculation of your percentage of annual salary deferred under the 401(k) plan will be based on your Adjusted Annual Cash Compensation paid out in bi-weekly salary payments (in the example above, the 401k contribution would be calculated on $[_____]14). If you then elect to have 5% of your gross, before-tax annual salary deferred under the 401(k) plan, the 5% contribution rate would be based on the Adjusted Annual Cash Compensation of $[_____]15. The result would be that $[_____]16 rather than $25,000 (or such lesser amount up to the applicable 401(k) maximum annual contribution) would be deferred on a pre-tax basis under the 401(k) plan for [_____]17.

If you receive an Annual Cash Compensation increase during [_____]18, that increase will be paid to you in addition to your Adjusted Annual Cash Compensation; it will not be added to your Eligible Cash Compensation under the Program. The amount you are electing for your Stock Option Allocation Amount is a flat amount that will not change for the Program year, except as otherwise set forth herein.

In addition, you should be aware of the impact to your take home pay on any benefit plan premiums you pay from each paycheck. The amount of Eligible Cash Compensation you direct to the Program (your Stock Option Allocation Amount) also will not be considered when calculating your life insurance, short-term disability, long-term disability, and workers’ compensation benefits. So please be sure to take all of this into account when determining your Stock Option Allocation Amount.

For purposes of Roku’s Amended and Restated Severance Benefit Plan, the term “Monthly Base Salary” will be determined based on your Annual Cash Compensation before reduction for your election under the Program.

Nonstatutory Stock Options (“NSOs”) will be granted on the Grant Date (as defined below) that occurs during the month following the month of your salary reduction. “Grant Date” means the first trading day of the applicable month; provided, however, if such date occurs within the period starting four business days before and ending one business day after Roku (i) files a periodic report on a Form 10-K or a Form 10-Q or (ii) files or furnishes a current report on a Form 8-K that discloses material nonpublic information (including earnings information), other than a current report on Form 8-K disclosing a material new option grant award under Item 5.02(e) (such period, the “Filing Period”), then the Grant Date will be the first trading day following expiration of the Filing Period in the applicable month. At the end of each month, we will calculate the amount of the monthly portion of your Stock Option Allocation Amount and convert that into a number of NSOs determined under the formula set forth below. NSOs will be fully vested when granted.

Process for Converting Monthly Portion of Stock Option Allocation Amount to Options:

(Stock Option Allocation Amount ÷ 12) ÷ (Closing Price on Grant Date ÷ [_])19

Roku will not grant NSOs for a fractional share so the actual number of NSOs to be granted will be rounded down to the nearest whole share. The remaining dollar amount will be carried over to the next month and added to the amount of the monthly portion of Stock Option Allocation Amount for purposes of the option grant to be made for that month. Any Stock Option Allocation Amount not applied to the grant of an NSO due to the fractional share limitation by the end of [_____]20 will be refunded to you during the second regular payroll period in January [____]21.

Except as otherwise provided in this section, your election is irrevocable following the Deadline. After the Deadline, you will not be able to change your election amount. You will remain enrolled in the Program for all of calendar year [_____]22 unless (i) the withdrawal is during an open trading window, (ii) you are not otherwise in possession of material, non-public information, and (iii) such withdrawal is due to an “unforeseeable emergency,” as such term is used in Section 409A of the Internal Revenue Code of 1986, as amended, and the treasury regulations thereunder (“Section 409A”). In the case of an unforeseeable emergency, such withdrawal will take effect only to the extent necessary to satisfy the unforeseeable emergency, and any reference to a withdrawal in the Program will be deemed to mean a withdrawal only to such extent. If you withdraw from the Program, you will not be able to re-enroll in the Program for calendar year [_____]23. Your withdrawal from the Program will be effective beginning on the first payroll period in the month after you notify Roku of your withdrawal. For example, if you notify Roku of your intent to withdraw from the Program in June during the open trading window, the monthly portion of your Stock Option Allocation Amount will still apply for the month of June followed by a grant of NSOs on the Grant Date in July. Then, beginning with the first payroll period in July you will receive your prorated bi-weekly salary less applicable taxes and deductions (based on the reduced amount due to the unforeseeable emergency), plus any amount of cash from a fractional share carryover from a prior month.

If you elect to participate in the Program and, during the course of calendar year [_____]24 you: (i) move outside of the United States, (ii) are no longer on Roku’s payroll in the United States, or (iii) no longer have the stock level of CEO or SVP (clauses (i) through (iii), collectively, an “Employment Change”), you will no longer be eligible to participate in the Program and you will be automatically withdrawn from the Program. Your withdrawal will become effective as of the first payroll period in the month after the change in your status. For example, if you are no longer eligible to participate in the Program beginning in June, the monthly portion of your Stock Option Allocation Amount for June will still apply followed by a grant of NSOs on the Grant Date in July. Then, beginning with the first payroll period in July you will receive your full bi-weekly salary less applicable taxes and deductions, plus any amount of cash from a fractional share carryover from a prior month.

If your employment status with Roku changes from full-time to part-time or you take an unpaid leave of absence (an “Employment Reduction”), you will no longer be eligible to participate in the Program and you will be automatically withdrawn from the Program as of the effective date of the Employment Reduction. You will receive a cash salary payment, less applicable taxes and deductions, for the portion of your Stock Option Allocation Amount during the month of your Employment Reduction, to the extent such amount has already been deducted from your paycheck for such month, prorated for any partial month of active employment. You will not be eligible to receive a stock option grant for that month (other than a stock option grant previously made during such month in respect of your Stock Option Allocation Amount deducted from the prior month) or any subsequent month under the Program.

In the event your Annual Cash Compensation is reduced other than pursuant to an Employment Change or an Employment Reduction (a “Cash Reduction”) while you are a participant in the Program, a corresponding proportionate reduction to your Eligible Cash Compensation, Stock Option Allocation Amount and Adjusted Annual Cash Compensation under the Program (collectively with the Annual Cash Compensation, the “Program Compensation”) will be made automatically as of the effective date of the Cash Reduction; provided, however, in no event will your Adjusted Annual Cash Compensation be reduced below $66,560. In the event of any such reduction, you will have no right with respect to any portion of the Program Compensation that is reduced in connection with such reduction, subject to applicable law; provided, however, that you will receive a cash salary payment, less applicable taxes and deductions, for the portion of your Stock Option Allocation Amount that will not be applied to stock options pursuant to the Program due to the Cash Reduction, to the extent such amount has already been deducted from your paycheck for such month.

Stock options previously granted to you under the Program (and otherwise) will remain exercisable for their remaining term as set forth in the applicable stock option grant documents, subject to Roku’s ability to take any of the actions set forth in the applicable stock option grant documents, including without limitation pursuant to Section 9(b) and/or Section 9(c) of the 2017 Plan.

If your Continuous Service with Roku terminates for any reason during calendar year [_____]25, your enrollment in the Program will automatically terminate and you will receive a cash salary payment, less applicable taxes and deductions, for the portion of your Stock Option Allocation Amount during the month of your termination (prorated for any partial month). You will not be eligible to receive a stock option grant for that month (other than a stock option grant previously made during such month in respect of your Stock Option Allocation Amount deducted from the prior month) or any subsequent month under the Program. Stock options previously granted to you under the Program (and otherwise) will remain exercisable for their remaining term as set forth in the applicable stock option grant documents, subject to Roku’s ability to take any of the actions set forth in the applicable stock option grant documents, including without limitation pursuant to Section 9(b) and/or Section 9(c) of the 2017 Plan.

You should be aware that Roku, in its discretion, may change or end the operation of the Program and/or the 2017 Plan at any time. If Roku decides to change or terminate the Program and/or the 2017 Plan, you will not have any claim against Roku to receive additional option grants or any other equity benefits equivalent to the option grant. You acknowledge that Roku is not obligated to continue to grant options, restricted stock units or any other equity awards to you. You also acknowledge that Roku is not obligated to offer the Program in any subsequent years.

Roku will administer the Program and will have discretionary authority to interpret and construe the terms and conditions of the Program and to adopt rules and regulations for administration of the Program. All determinations, interpretations and constructions made by Roku pursuant to such authority will be final and binding. The foregoing authority does not in any way supersede, diminish, replace or otherwise modify the authority of the Board, the Committee or an Officer, as applicable (each as defined in the 2017 Plan) to administer the 2017 Plan (and options granted pursuant to the Program) in accordance with the terms of the 2017 Plan.

Roku’s obligation under the Program shall be merely that of an unfunded and unsecured promise of Roku to issue NSOs in the future, and your rights will be no greater than those of unsecured general creditors. You and your heirs, successors, and assigns will have no legal or equitable rights, claims, or interest in any specific property or assets of Roku. No assets of Roku will be held under any trust or held in any way as collateral security for the fulfilling of the obligations of Roku under the Program. Any and all of Roku’s assets will be, and remain, the general unpledged, unrestricted assets of Roku.

You have no right to commute, sell, assign, transfer, pledge, anticipate, mortgage or otherwise encumber, transfer, hypothecate, alienate or convey in advance of actual receipt, the amounts or NSOs, if any, payable or issuable hereunder, or any part thereof, which are, and all rights to which are expressly declared to be, unassignable and non-transferable. No part of the amounts payable or issuable will, prior to actual payment or issuance, be subject to seizure, attachment, garnishment (except to the extent Roku may be required to garnish amounts from payments due under the Program pursuant to applicable law) or sequestration for the payment of any debts, judgments, alimony or separate maintenance owed by you or any other person, be transferable by operation of law in the event of your or any other person’s bankruptcy or insolvency or be transferable to a spouse as a result of a property settlement or otherwise.

The terms and conditions of the Program will not be deemed to constitute a contract of employment or continued engagement between Roku or any of its affiliates and you. Nothing in the Program will be deemed to give you the right to be retained in the service of Roku or any of its affiliates or to interfere with the right of Roku or any of its affiliates to discipline or discharge you at any time for any or no reason, with or without notice (subject to applicable law). Your employment with Roku or any of its affiliates remains at will (subject to applicable law). In the event your compensation or regular level of employment with Roku is reduced (other than pursuant to an Employment Change, an Employment Reduction, or a Cash Reduction) while you are a participant in the Program, Roku has the right in its discretion to make a corresponding adjustment to your Program Compensation; provided, however, in no event will your Adjusted Annual Cash Compensation be reduced below $[_____]26.26 In the event of any such adjustment, you will have no right with respect to any portion of the Program Compensation that is reduced in connection with such adjustment, subject to applicable law.

The Program is intended to be exempt from Section 409A to the maximum extent an exemption is available; provided, however, that to the extent an exemption under Section 409A is unavailable, the Program is intended to comply with the requirements of Section 409A. To the extent that any provision of the Program is ambiguous as to its exemption from or compliance with Section 409A, the provision will be read in such a manner that the applicable payments or issuances hereunder are exempt from Section 409A to the maximum permissible extent, and for any payments or issuances where such construction is not tenable, that those payments or issuances comply with Section 409A to the maximum permissible extent. You acknowledge and agree that Roku and its affiliates make no representations with respect to the application of Section 409A to any payment or issuance under the Program and other tax consequences to any payments under the Program.

You understand and agree that any option grant made pursuant to your participation in the Program will be subject to the terms of the 2017 Plan and your applicable award agreement and that this Enrollment Form is governed by the internal substantive laws of the State of Delaware, without regard to that state’s conflicts of laws rules. For purposes of any action, lawsuit or other proceedings brought to enforce this election, relating to it, or arising from it, the parties hereby submit to and consent to the sole and exclusive jurisdiction of the courts within Santa Clara County, State of California, and no other courts, where this election is made and/or to be performed.

The provisions of this Enrollment Form are severable and if any one or more provisions are determined to be illegal or otherwise unenforceable, in whole or in part, the remaining provisions shall nevertheless be binding and enforceable.

An option is a right to buy Roku common stock at a specified price (exercise price). The exercise price will be the fair market value of a share of Roku common stock (equal to the closing Nasdaq price of Roku stock) on the Grant Date. As detailed below, upon exercise of the option, you become the owner of the shares of Roku common stock.

General requirements and restrictions

•Vesting - Options granted to you under the Program will be fully vested at grant.

•Exercise - You do not own shares of Roku common stock upon the grant of your vested options. To own such shares of Roku common stock, you must exercise the vested options.

•Expiration and Forfeiture - Options granted under the Program will have a maximum 10-year term and will be exercisable at any time during the option term even if you have terminated employment with Roku, subject to Roku’s ability to take any of the actions set forth in the applicable stock option grant documents, including without limitation pursuant to Section 9(b) and/or Section 9(c) of the 2017 Plan. Options not exercised during the term will automatically expire and will be automatically cancelled.

If you enroll in the Program, you will not be subject to tax on the date the options are granted. Instead, you will be subject to ordinary income and withholding taxes on the date you exercise your options. The taxable income amount will be the excess of the fair market value of Roku common stock on the date of exercise over the option exercise price (i.e., the “spread”).

You may also be subject to capital gains tax at the time you sell any shares of Roku common stock acquired upon the exercise of the options, provided you sell the shares at a gain (i.e., the sale price is greater than the fair market value of the shares at the time of acquisition).

Please note that that you are solely responsible for all taxes associated with your stock options, even if Roku has an obligation to withhold (and does or does not withhold) applicable taxes at the time of exercise. Therefore, you should consult your personal accountant or tax advisor regarding the tax implications of any stock options granted to you. You should also refer to the tax sections of the prospectus for the 2017 Plan.