Exhibit A

Title

Chief Executive Officer.

Direct Report

You will report to Michael McConnell, the Chairman of the Board.

Start Date

August 11, 2016.

Salary

$400,000 annually, paid in accordance with the Company’s normal payroll practices, but no less than monthly.  In the event that you relocate to Los Angeles while employed at the Company (i) the Company shall reimburse you for reasonable out of pocket relocation expenses of up to $50,000 and (ii) if the Company terminates your employment without Cause or you terminate your employment for Good Reason in the first year of your employment, the Company shall pay for your costs of relocating to Chicago, up to $50,000.

Benefits

You shall be entitled to participate, as long as you are an employee of the Company, in any and all of the Company’s present or future employee benefit plans, including without limitation pension plans, thrift and savings plans, insurance plans, and other benefits that are generally applicable to the Company’s executives; provided, however, that the accrual and/or receipt of benefits under and pursuant to any such present or future employee benefit plan shall be determined by the provisions of such plan.  You shall be entitled to an annual cash and/or stock bonus at the discretion of the Board of Directors.   You shall be reimbursed for all reasonable expenses incurred in connection with the conduct of the Company’s business upon presentation of evidence of such expenditures, including but not limited to travel expenses incurred by you in the

performance of your duties.

“Cause” shall mean the occurrence during the term of employment of any of the following: (i) formal admission to (including a plea of guilty or nolo contendere to), or conviction of a felony, or any criminal offense involving your moral turpitude under any applicable law, or (ii) gross negligence or willful misconduct by you in the performance of your material duties and such negligence or misconduct has been communicated to you in the form of a written notice from the Board, and that you have not substantially cured within thirty (30) days following receipt of such written notice.

“Good Reason” shall mean the occurrence during the term of employment of any of the following: (i) your base salary is reduced by the Company; (ii) a reduction in your title, or a material reduction in your duties, authorities, and/or responsibilities; or (iii) a requirement by the Company, without your consent, that you relocate to a location greater than thirty-five (35) miles from your place of residence in California.  Notwithstanding the above, the occurrence of any of the events described in the foregoing sentence shall not constitute Good Reason unless you give the Company written notice, within thirty (30) calendar days after you have knowledge of the occurrence of any of the events described in the foregoing sentence, that such circumstances constitute Good Reason and the Company thereafter fails to cure such circumstances within thirty (30) days after receipt of such notice, and you terminate your employment hereunder within ninety (90) days after such event occurs.

Additional Activities Provision

You acknowledge and agree that in your role as Chief Executive Officer, you shall acquire confidential and proprietary information belonging to the Company. To preserve and protect this information and the assets of the Company, you agree that during the period of your employment by the Company you will not, without the Company’s express written consent, engage in any employment or business activity other than for the Company, and for the period of your employment by the Company you will not: (i) induce any associate of the Company to leave the employ of the Company; or (ii) solicit the business of any client or customer of the Company (other than on behalf of the Company) for businesses and/or services similar to those offered by the Company; provided that the foregoing shall not apply to any associate who was an employee of PEAK6 Investments, L.P. (“PEAK6”) prior to becoming an employee of the Company. You further agree that, after the date of termination of your employment with the Company, you will not: (i) use or disclose to others the Company’s proprietary information for any purpose at any time; or (ii) engage in any acts of unfair competition, including but not limited to use or disclosure of the Company’s trade secrets for the benefit of or to any competitor.  Notwithstanding the foregoing, it is acknowledged and agreed that you will share information regarding the Company with PEAK6 and that PEAK6 shall receive such information subject to the confidentiality obligations set forth in the Management Services Agreement entered into as of the date hereof by and between PEAK6 and the Company. Further, you hereby acknowledge and agree

that substantially all of your work time shall be devoted to Spark, except to the extent otherwise approved by the Board in writing, it being agreed by the Board that you shall be permitted to provide PEAK6 the transition and consultative services set forth on Exhibit A.

/s/ Daniel Rosenthal

August 9, 2016

Daniel Rosenthal

Date