Exhibit 10.21

STOCK OPTION GRANT AGREEMENT

(Non-Qualified Stock Options)

THIS AGREEMENT, made as of this      day of              20     between Sovereign Holdings, Inc. (the “Company”) and              (the “Participant”).

WHEREAS, the Company has adopted and maintains the Sovereign Holdings, Inc. 2012 Management Equity Incentive Plan (the “Plan”) to promote the interests of the Company and its Affiliates and stockholders by providing the Company’s key employees, directors and others with an appropriate incentive to encourage them to continue in the employ of and provide services for the Company or its Affiliates and to improve the growth and profitability of the Company;

WHEREAS, the Plan provides for the Grant to Participants of Non-Qualified Stock Options to purchase shares of Common Stock of the Company.

NOW, THEREFORE, in consideration of the premises and the mutual covenants hereinafter set forth, the parties hereto hereby agree as follows:

1. Grant of Options. Pursuant to, and subject to, the terms and conditions set forth herein and in the Plan, the Company hereby grants to the Participant a NON-QUALIFIED STOCK OPTION (the “Option”) with respect to                  shares of Common Stock of the Company.

2. Grant Date. The Grant Date of the Option hereby granted is             .

3. Vesting of Options. The Options shall vest in equal installments of 6.25% at the end of each successive three month period following the Grant Date, until 100% of the Options are fully vested, subject in all cases to the Participant’s continued Employment (which, as defined in the Plan, includes provision of services as a director) through each such date (each such date, a “Vesting Date”). In the event of a Qualifying Termination following a Change in Control, the Options shall immediately vest and become exercisable as of such Qualifying Termination following a Change in Control.

4. Expiration of Options. The Participant’s Option(s), or portion thereof, which have not become exercisable shall expire on the date the Participant’s Employment is terminated for any reason. The Participant’s Option(s), or any portion thereof, which have become exercisable on or before the date the Participant’s Employment is terminated (or that become exercisable as a result of such termination) shall expire on the earlier of (i) the commencement of business on the date the Participant’s Employment is terminated for Cause; (ii) 90 days after the date the Participant’s Employment is terminated for any reason other than Cause, death or Disability; (iii) one year after the date the Participant’s Employment is terminated by reason of death or Disability; or (iv) the 10th anniversary of the Grant Date for such Option(s). All Options, whether vested or unvested, that have not sooner expired shall expire no later than the tenth anniversary of the Grant Date. Any Option, or portion thereof, that has become exercisable by a Permitted Transferee on account of the death of the Participant shall expire one year after the date the deceased Participant’s Employment terminated by reason of death, and any Option

or portion thereof that has been transferred to a Permitted Transferee during the lifetime of the Participant shall expire in connection with the Participant’s termination of Employment at the time set forth under this Section 4 as if the Option were held directly by the Participant.

5. Incorporation of Plan. All terms, conditions and restrictions of the Plan are incorporated herein and made part hereof as if stated herein. If there is any conflict between the terms and conditions of the Plan and this Agreement, the terms and conditions of this Plan, as interpreted by the Board, shall govern. All capitalized terms used and not defined herein shall have the meaning given to such terms in the Plan.

6. Exercise Price; Exercisability. The exercise price of each share of Common Stock underlying the Option hereby granted is $        . The Participant acknowledges and agrees that the exercise of the Option is subject to the terms of the Plan, including pursuant to Sections 5.5 and 5.6.

7. Construction of Agreement. Any provision of this Agreement (or portion thereof) which is deemed invalid, illegal or unenforceable in any jurisdiction shall, as to that jurisdiction and subject to this section, be ineffective to the extent of such invalidity, illegality or unenforceability, without affecting in any way the remaining provisions thereof in such jurisdiction or rendering that or any other provisions of this Agreement invalid, illegal, or unenforceable in any other jurisdiction. If any covenant should be deemed invalid, illegal or unenforceable because its scope is considered excessive, such covenant shall be modified so that the scope of the covenant is reduced only to the minimum extent necessary to render the modified covenant valid, legal and enforceable. No waiver of any provision or violation of this Agreement by the Company shall be implied by the Company’s forbearance or failure to take action. No provision of this Agreement shall be given effect to the extent that such provision would cause any tax to become due under Section 409A of the Code.

8. Delays or Omissions. No delay or omission to exercise any right, power or remedy accruing to any party hereto upon any breach or default of any party under this Agreement, shall impair any such right, power or remedy of such party nor shall it be construed to be a waiver of any such breach or default, or an acquiescence therein, or of or in any similar breach or default thereafter occurring nor shall any waiver of any single breach or default be deemed a waiver of any other breach or default theretofore or thereafter occurring. Any waiver, permit, consent or approval of any kind or character on the part of any party of any breach or default under this Agreement, or any waiver on the part of any party or any provisions or conditions of this Agreement, shall be in writing and shall be effective only to the extent specifically set forth in such writing.

9. Limitation on Transfer. The Option shall be exercisable only by the Participant or the Participant’s Permitted Transferee(s), as determined in accordance with the terms of the Plan (including without limitation the requirement that the Participant obtain the prior written approval by the Board of any proposed Transfer to a Permitted Transferee during the lifetime of the Participant). Each Permitted Transferee shall be subject to all the restrictions, obligations, and responsibilities as apply to the Participant under the Plan and this Grant Agreement and shall be entitled to all the rights of the Participant under the Plan, provided that in respect of any Permitted Transferee which is a trust or custodianship, the Option shall become exercisable

and/or expire based on the Employment and termination of Employment of the Participant. All shares of Common Stock obtained pursuant to the Option granted herein shall not be transferred except as provided in the Plan and, where applicable, the Management Stockholders’ Agreement.

10. Integration. This Agreement, and the other documents referred to herein or delivered pursuant hereto which form a part hereof contain the entire understanding of the parties with respect to its subject matter. There are no restrictions, agreements, promises, representations, warranties, covenants or undertakings with respect to the subject matter hereof other than those expressly set forth herein and in the Plan. This Agreement, including without limitation the Plan, supersedes all prior agreements and understandings between the parties with respect to its subject matter.

11. Counterparts. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which shall constitute one and the same instrument.

12. Governing Law. This Agreement shall be governed by and construed and enforced in accordance with the laws of the State of Delaware without regard to the provisions governing conflict of laws.

13. Participant Acknowledgment. The Participant hereby acknowledges receipt of a copy of the Plan. The Participant hereby acknowledges that all decisions, determinations and interpretations of the Board in respect of the Plan, this Agreement and the Option shall be final and conclusive. The Participant further acknowledges that, prior to the existence of a Public Market, no exercise of the Option or any portion thereof shall be effective unless and until the Participant has executed the Management Stockholders’ Agreement and the Participant hereby agrees to be bound thereby.

*        *        *         *        *

IN WITNESS WHEREOF, the Company has caused this Agreement to be duly executed by its duly authorized officer and said Participant has hereunto signed this Agreement on his own behalf, thereby representing that he has carefully read and understands this Agreement, the Plan and the Management Stockholders’ Agreement as of the day and year first written above.

Sovereign Holdings, Inc.

By:

Title:

[Participant’s name]