Document:

EX-10.1

 Exhibit 10.1 

EXECUTIVE EMPLOYMENT AGREEMENT 

THIS Executive Employment Agreement (“Agreement”) is made and entered into as of February 18, 2015 (the
“Effective Date”), by and between Rubicon Technology, Inc., a Delaware corporation (the “Company”), and William F. Weissman, a resident of the State of Illinois (the “Executive”). 

PRELIMINARY STATEMENTS 

The Company is in the business of providing material science solutions of sapphire and other advanced technology materials for the
Opto-electrics Semiconductor Fabrication, Optical and Laser and Telecommunications Marketplaces (“Company’s Business”); provided, however, the term shall be deemed amended to reflect any actual change in the
Company’s Business after the date hereof but prior to the day following the date on which Executive shall cease to be employed by the Company (as reflected in the minutes of the Board of Directors of the Company prior to the Termination Date
(as defined below) or the Resignation Date (as defined below), as applicable). 
 As a result of Executive’s previous employment as the
Company’s Chief Financial Officer, Interim Chief Executive Officer and his current employment as the Company’s President and Chief Executive Officer, the Executive is well acquainted with the affairs of the Company and its personnel,
services, products, and business practices and relationships and other Confidential Information (as defined in Section 5 below). This Agreement is entered into for, among other things, the protection of the Company’s business
relationships, goodwill and going business value and the prevention of the unauthorized use or disclosure of any Confidential Information by the Executive. 

Capitalized terms used herein, but not otherwise defined shall have the meanings ascribed to such terms in the Company’s 2007 Stock
Incentive Plan, as amended (the “Plan”). 
 AGREEMENT 

In consideration of the premises and the mutual promises and covenants contained in this Agreement and other good and valuable consideration,
the receipt and sufficiency of which is hereby acknowledged, the parties hereto agree as follows: 
 Section 1. Employment and
Duties. 
 (a) Employment Duties. Throughout the Employment Term (as defined in Section 2 below),
the Executive shall serve as the President and Chief Executive Officer (“CEO”) of the Company, and shall report to the Board of Directors of the Company (the “Board”). Throughout the Employment Term, the Executive
shall: (i) devote his working hours, on a full-time basis, to his duties and responsibilities to the Company; (ii) faithfully and loyally serve the Company; (iii) comply in all material respects with all

 
lawful directions and instructions given to him by the Board; and (iv) use his best efforts to promote and serve the interests of the Company. The Executive shall comply in all material
respects with all applicable laws, rules and regulations relating to the performance of the Executive’s duties and responsibilities hereunder. 

(b) Exclusive Employment. Throughout the Employment Term, the Executive shall not render his services, directly or
indirectly, to any person or entity other than the Company without the prior consent of the Board, which may be withheld or granted by the Board in its sole discretion. The Executive shall not engage in any activity which would materially interfere
with the faithful and timely performance of his duties under this Agreement; provided, however, the Executive may, subject to the prior consent of the Board, which shall not be unreasonably withheld, serve as a director of any other
company, so long as such service does not unreasonably and materially interfere with the timely performance of the Executive’s duties under this Agreement. 

Section 2. Employment Term. The Executive’s employment as the President and CEO of the Company commenced on
December 9, 2014 and shall continue thereafter unless and until his employment is terminated pursuant to the terms of this Agreement. As used herein, “Employment Term” shall mean the actual period of time during which the
Executive is employed by the Company under the terms and conditions of this Agreement. 
 Section 3. Compensation and Other
Benefits. During the Employment Term, the Company shall pay and provide the following compensation and other benefits to the Executive as full compensation for all services rendered by the Executive to the Company: 

(a) Annual Salary. The Executive’s annual salary shall be Three Hundred Thousand Dollars ($300,000.00) (the
“Annual Salary”), which shall be retroactive to January 1, 2015. The Annual Salary shall be paid in accordance with the then-prevailing payroll practices of the Company, less applicable taxes, payroll deductions and
withholdings required by law. The Board shall review the Annual Salary on an annual basis and make appropriate adjustments thereto from time to time; provided that the Annual Salary shall not be reduced below $300,000 without the Executive’s
prior written consent. At the end of calendar year 2015, the Company agrees that the Board shall review the Annual Salary to make any appropriate adjustments, in its sole discretion, based on anticipated improvements in the Company’s cost
structure and business outlook. 
 (b) Bonuses. 

(i) In 2015, the Executive shall be eligible to receive a bonus of One Hundred Fifty Thousand Dollars ($150,000.00) based upon
the achievement of certain objectives and criteria mutually agreed upon by the Board and the Executive (the “Cash Bonus”). The Board and the Executive shall agree upon the bonus objectives and criteria for the Cash Bonus no later
than March 31, 2015. The Cash Bonus, if achieved by the Executive, will be paid no later than March 31, 2016, and shall be subject to applicable taxes, payroll deductions, and withholdings required by law. For years after 2015, the Board
shall review the Executive’s eligibility for similar bonuses based upon the achievement of certain objectives and criteria mutually agreed upon by the Board and the Executive. 

  
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 (ii) The Board, in its sole discretion, may determine to pay Executive a
discretionary cash bonus (the “Discretionary Bonus”). If paid, the Discretionary Bonus shall be subject to applicable taxes, payroll deductions, and withholdings required by law. 

(ii) In consideration of the Executive’s service as the Company’s Interim CEO, the Company shall pay to the Executive
a cash payment in the amount of Fifty Thousand Dollars ($50,000.00) on or before March 17, 2015. This payment shall be subject to applicable taxes, payroll deductions and withholdings as required by law. 

(c) Equity. 

(i) Nonstatutory Stock Options. On December 1, 2015, the Company shall grant Executive Nonstatutory Stock Options
under the Plan. The number of Options so granted shall reflect the number of whole Options nearest the target value of Two Hundred Fifty Thousand Dollars ($250,000.00), determined using the Fair Market Value per Share as determined under the Plan as
of the date of grant. The grant of such Nonstatutory Stock Options shall be evidenced by an Option Agreement, which shall set forth the 10-year term of the Option, the exercise price, the applicable four year ratable vesting period (with
immediate, accelerated full vesting upon a Change in Control), a 12-month period of exercise of the Options following the death of the Executive and all other conditions for the vesting or exercise of such Nonstatutory Stock Options. 

(ii) Performance-Based Restricted Stock Units. Upon the execution of this Agreement, the Company shall grant
Executive Restricted Stock Units pursuant to the terms of the Plan. The number of Restricted Stock Units so granted shall reflect the number of whole Shares nearest the target value of One Hundred Thousand Dollars ($100,000.00), determined using the
Fair Market Value per Share as determined under the Plan as of the date of grant. The grant of such Restricted Stock Units shall be evidenced by an Award Agreement, which shall set forth the vesting conditions for the award, including, but not
limited to, the applicable performance period, the performance metrics and any continued service required for the vesting of the Award. The Compensation Committee of the Board shall approve such performance metrics no later than March 31,
2015. The Award shall become fully vested upon a Change in Control. 
 (d) Employee Benefit Plans. The Executive shall be eligible to
participate in all employee benefit plans offered by the Company, but participation shall be subject to all of the terms and conditions of such plans applicable to all such employees, including all waiting periods, eligibility requirements,
contributions, exclusions and other similar conditions or limitations. 

  
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 (e) Vacation. The Executive shall be entitled to accrue twenty (20) vacation days per
calendar year, which vacation days shall accrue proportionately throughout the year based on completed months of service. Any unused vacation days shall not be carried forward from one calendar year to the next. For purposes of this Agreement, the
term “Termination Vacation Pay” shall mean, at the time of a termination of the Executive’s employment hereunder, the payment due to the Executive at the rate of the Annual Salary in effect at that time, on a daily basis, multiplied
by the number of earned and unused vacation days for the then-current calendar year for the period between January 1 of such year and the Termination Date. 

(f) Other Expenses. The Company shall reimburse the Executive for all reasonable and ordinary out-of-pocket business expenses incurred
by the Executive in the scope of his employment hereunder. The Executive shall submit itemized expense reports in order to obtain reimbursement of expenses and shall submit with such expense reports such records and logs as may be required by the
relevant taxing authorities for the substantiation of each such business expense as a deduction on the Company’s income tax returns. 

Section 4. Termination of Employment. The Executive’s employment with the Company shall be subject to termination as
follows: 
 (a) Termination for Cause. The Company may immediately terminate the Executive for Cause (as defined
below) by giving written notice to the Executive. In the event of a termination for Cause, the Executive shall be entitled to payment of (i) that portion of any of Executive’s Annual Salary that the Executive earned through and including
the Termination Date, at the rate of the Annual Salary in effect at that time, (ii) any Termination Vacation Pay, and (iii) any bonus earned prior to the Termination Date that remains unpaid, subject to any offset or recoupment rights of
the Company and any other rights or remedies applicable to any breach of this Agreement by the Executive prior to the Termination Date. Except as provided herein or required by applicable law, the Executive shall not be entitled to any other
compensation or benefits. Termination for “Cause” shall mean termination by the Board of the Executive’s employment with the Company, after a good faith determination by the Board at a meeting called and held for that purpose,
or in a written consent to resolutions signed by all members of the Board, and after reasonable notice to the Executive, that the Executive: 

(i) has willfully engaged in misconduct materially and adversely affecting the Company; 

(ii) engaged in theft, fraud, embezzlement or similar behavior; 

(iii) has been indicted or convicted of a felony; or 

(iv) has willfully continued, after a correction period, to fail to substantially perform the material duties of
Executive’s position with the Company (other than failure resulting from incapacity due to physical or mental 

  
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illness). The correction period shall last not less than ten (10) days after the Company provides Executive with written notice of Executive’s failure to substantially perform
Executive’s material duties. 
 (b) Termination Without Cause. The Company may, in its sole discretion, terminate
the Executive without Cause, by providing written notice to the Executive (the “Termination Notice”) at least thirty (30) calendar days prior to the Termination Date. In the event of a termination without Cause, the Executive
shall be entitled to: (i) payment of that portion of any Executive’s Annual Salary that the Executive earned through and including the Termination Date, at the rate of the Annual Salary in effect at that time; (ii) any Termination
Vacation Pay; (iii) any bonus earned prior to the Termination Date that remains unpaid; (iv) payment of Executive’s Annual Salary, at the rate of the Annual Salary in effect at that time, commencing on the Termination Date and
continuing for the twelve (12) month period thereafter; (v) immediate vesting of any Options granted pursuant to Section 3(c)(i) and immediate vesting of any Restricted Stock Units granted pursuant to
Section 3(c)(ii); and (vi) immediate vesting of any other Options granted by the Company to the Executive; provided, however, that the Executive executes and delivers to the Company a complete release agreement in form
and substance reasonably acceptable to the Company. In addition, the Company shall be obligated to continue any health and welfare benefits provided to the Executive under Section 3(d) throughout the period commencing on the Termination
Date and continuing for a twelve (12) month period thereafter. Except as provided herein or required by applicable law, the Executive shall not be entitled to any other compensation or benefits. With respect to Section 4(b)(iv)
above, such payments shall be paid in accordance with the then-prevailing payroll practices of the Company, less applicable taxes, payroll deductions and withholdings required by law. 

(c) Resignation. The Executive may resign from his employment with the Company at any time by providing written notice
to the Company thirty (30) calendar days prior to the Resignation Date. In the event of resignation, the Executive shall be entitled to payment of that portion of the Executive’s Annual Salary that the Executive earned through and
including the Resignation Date, at the rate of the Annual Salary in effect at that time, any Termination Vacation Pay and any bonus earned prior to the Resignation Date that remains unpaid. Except as provided herein (including, without limitation,
in Section 4(d)) or required by applicable law, the Executive shall not be entitled to any other compensation or benefits. 

(d) Resignation for Good Reason. Notwithstanding Section 4(c), the Executive may terminate his employment by
the Company for Good Reason (as defined below) by providing written notice thereof to the Company (the “Resignation Notice”) at least thirty (30) days prior to the Resignation Date, which notice shall set forth in reasonable
detail the nature of the facts and circumstances which constitute “Good Reason” (as defined below) and Company shall have thirty (30) days after receipt of the Resignation Notice to cure in all material respects the facts and
circumstances which constitute Good Reason. In the event of a termination for Good Reason, the Executive shall be entitled to: (i) payment of that portion of the Executive’s Annual Salary that the Executive earned through and including the
Resignation Date, at the rate of the Annual 

  
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Salary in effect at that time; (ii) any Termination Vacation Pay; (iii) any bonus earned prior to the Resignation Date that remains unpaid; (iv) payment of Executive’s Annual
Salary, at the rate of the Annual Salary in effect at that time, commencing on the Resignation Date and continuing for the twelve (12) month period thereafter; (v) immediate vesting of any Options granted pursuant to
Section 3(c)(i) and immediate vesting of any Restricted Stock Units granted pursuant to Section 3(c)(ii); and (vi) immediate vesting of any other Options granted by the Company to the Executive; provided,
however, that the Executive executes and delivers to the Company a complete release agreement in form and substance reasonably acceptable to the Company. In addition, the Company shall be obligated to continue any health and welfare benefits
provided to the Executive under Section 3(d) throughout the period commencing on the Termination Date and continuing for a twelve (12) month period thereafter. Except as provided herein or required by applicable law, the Executive
shall not be entitled to any other compensation or benefits. With respect to Section 4(d)(iv) above, such payments shall be paid in accordance with the then-prevailing payroll practices of the Company, less applicable taxes, payroll
deductions and withholdings required by law. 
 For purposes of this Agreement, “Good Reason” means the
resignation of the Executive’s employment by the Company by the Executive, because of (A) any reduction in the Executive’s Annual Salary then in effect in a manner that is not permitted under Section 3(a) hereof,
(B) a substantial diminution in the duties, responsibilities or titles of the Executive, but only if uncured in accordance with the foregoing provisions hereof, or (C) being required by the Board to relocate (for a period longer than six
(6) consecutive months) greater than 100 miles from the Chicago, Illinois metropolitan area in order to maintain employment with the Company pursuant to this Agreement. 

(e) Termination Subsequent To A Change In Control. Notwithstanding anything to the contrary herein, in the event that
the Company, at any time within two (2) years after a Change in Control, terminates the Executive without Cause or the Executive resigns with Good Reason, the Executive shall be entitled to the payments and benefits set forth in Sections
4(b) or 4(d), as the case may be, except that, in lieu of the payment pursuant to Section 4(b)(iv) and 4(d)(iv), the Company shall pay to the Executive a lump sum payment within thirty (30) days of the Termination
Date or Resignation Date, as applicable. The lump sum payment shall be equal to the Executive’s Annual Salary at the time of the Termination Date or Resignation Date, as the case may be, less all applicable taxes, payroll deductions and
withholdings required by law. In addition, any unvested options under any then-existing Option Agreement shall immediately be fully vested and exercisable by the Executive. 

Notwithstanding the preceding sentence, if the independent accountants acting as auditors for the Company on the date of the
Change in Control determine that such single payment, together with other compensation received by the Executive, would constitute “excess parachute payments” within the meaning of Section 280G of the Internal Revenue Code of 1986, as
amended, and regulations thereunder, the single payment to the Executive shall be reduced to the maximum amount which may be paid without such payments in the aggregate constituting “excess parachute payments,” provided that such amount
shall not be reduced below the payment as set forth in Section 4(b)(iv) or 4(d)(iv) as referenced above. 

  
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 (f) Death. If the Executive dies, his employment with the Company and this
Agreement shall automatically terminate on the date of his death. The Executive’s estate or personal representative shall be entitled to receive that portion of the Annual Salary that the Executive earned through and including the date of the
Executive’s death, at the rate of the Annual Salary in effect at that time, any Termination Vacation Pay and any bonus earned prior to the date of the Executive’s death that remains unpaid. Except as provided herein or required by
applicable law, neither the Executive’s estate nor his personal representative shall be entitled to any other compensation or benefits. 

(g) Disability. The Executive shall be deemed “Permanently Disabled” when he has suffered any medically
determinable physical or mental illness, injury or infirmity that prevents the Executive from performing his responsibilities under this Agreement and which disability has lasted or that the Board in good faith has determined can be expected to last
for a continuous period of not less than 120 calendar days. The Board has the discretion to determine whether the Executive is disabled and that determination shall be binding and conclusive on the Executive (and any guardians or representatives for
him). If the Executive becomes Permanently Disabled, the Company may terminate the Executive’s employment with the Company as a result of the Permanent Disability by providing written notice to the Executive thirty (30) calendar days prior
to the Termination Date, or the Executive may resign from his employment with the Company by providing written notice to the Company thirty (30) calendar days prior to the Resignation Date. If the Executive resigns from employment with the
Company as a result of a Permanent Disability or the Company terminates the Executive’s employment as a result of a Permanent Disability, the Executive shall be entitled to receive that portion of the Annual Salary, at the rate in effect when
he became Permanently Disabled, that he earned through and including the Termination Date or Resignation Date, as applicable, less any amounts the Executive is entitled to receive under any disability insurance policy maintained by the
Company, any Termination Vacation Pay and any bonus earned prior to the Termination Date or Resignation Date, as applicable, that remains unpaid. Except as provided herein or required by applicable law, the Executive shall not be entitled to any
other compensation or benefits. 
 (h) Savings Clause. This paragraph 4(h) shall apply for so long as the Executive is
a “specified employee” for purposes of Section 409A of the Code. The determination of whether the Executive is a “specified employee” shall be made in accordance with the policy of the Company or, if none, under the default
rules in Section 1.409A-1(i) of the Treasury Regulations. Any amount otherwise payable to the Executive on account of the Executive’s separation from service as defined in Section 1.409A-1(h) of the Treasury Regulations that exceeds
the limit provided in Section 1.409A-1(b)(9)(iii) of the Treasury Regulations shall not be paid before the date which is six (6) months and a day after the date of the Executive’s separation from service (or, if earlier, the date of
the Executive’s death). Upon the expiration of the six-month deferral period referred to in the preceding sentence or the Executive’s death, all payments deferred pursuant to the preceding sentence shall be paid to the Executive (or the
Executive’s estate in the event of the Executives death) in a lump sum. 

  
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 Section 5. Confidentiality. For purposes of this Section 5, the
term “Company” shall include, in addition to the Company, its affiliates, subsidiaries and any of their respective predecessors, successors and assigns. 

(a) Confidential Information. As used in this Agreement, “Confidential Information” means any and all
confidential, proprietary or other information, whether or not originated by the Executive or the Company, which is in any way related to the past or present Company’s Business and is either designated as confidential or not generally known by
or available to the public. Confidential Information includes, but is not limited to (whether or not reduced to writing or designated as confidential) (i) information regarding the Company’s existing and potential customers and vendors;
(ii) any contracts (including the existence and contents thereof and parties thereto) to which the Company is a party or is bound; (iii) information regarding products and services being purchased or leased by or provided to the Company;
(iv) information received by the Company from third parties under an obligation of confidentiality, restricted disclosure or restricted use; (v) personnel and financial information of the Company; (vi) information with respect to the
Company’s products, services, facilities, business methods, systems, trade secrets, technical know-how, and other intellectual property; (vii) marketing and developmental plans and techniques, price and cost data, forecasts and forecast
assumptions, and potential strategies of the Company; and (viii) any other information relating to the Company which was obtained by the Executive in connection with his employment by the Company, whether before, on or after the Effective Date.

 (b) Non-Disclosure and Non-Use of
Confidential Information. The Executive acknowledges that the Confidential Information of the Company is a valuable, unique asset of the Company and the Executive’s unauthorized use or disclosure thereof could cause irreparable harm to the
Company for which no remedy at law could be adequate. Accordingly, the Executive agrees that he shall hold all Confidential Information of the Company in strict confidence and solely for the benefit of the Company, and that, except as necessary in
the course of Executive’s duties as an employee of the Company, he shall not, directly or indirectly, disclose or use or authorize any third party to disclose or use any Confidential Information. The Executive shall follow all the Company
policies and procedures to protect all Confidential Information and take any additional precautions necessary to preserve and protect the use or disclosure of any Confidential Information at all times. 

(c) Ownership of Confidential Information. The Executive acknowledges and agrees that all Confidential Information is
and shall remain the exclusive property of the Company, whether or not prepared in whole or in part by the Executive and whether or not disclosed to or entrusted to the custody of the Executive. Upon the termination or resignation of his employment
by the Company, or at any other time at the request of the Company, the Executive shall promptly deliver to the Company all documents, tapes, disks, or other storage media and any other materials, and all copies thereof in whatever form, in the
possession of the Executive pertaining to the Company’s Business, including, but not limited to, any containing Confidential Information. 

  
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 (d) Public Information. Notwithstanding anything contained in this
Agreement to the contrary, information which is generally available or accessible to the public shall be deemed Confidential Information of the Company if such information was retrieved, gathered, assembled or maintained by the Company in such a
manner not available to the public or for a purpose beneficial to the Company. From time to time, the Company may, for its own benefit, choose to place certain Confidential Information or records of the Company in the public domain. Notwithstanding
anything contained in this Agreement to the contrary, the fact that such Confidential Information may be made available to the public in a limited form and under limited circumstances does not change the confidential and proprietary nature of such
information, and does not release the Executive from his duties with respect to such Confidential Information as set forth in this Agreement. 

(e) Survival. The Executive’s obligations set forth in this Section 5, and the Company’s rights
and remedies with respect hereto, shall indefinitely survive the termination of this Agreement and the Executive’s employment by the Company, regardless of the reason therefor. 

Section 6. Restrictive Covenants. For purposes of this Section 6, the term “Company” shall
include, in addition to the Company, its affiliates, subsidiaries and any of their respective predecessors, successors and assigns. 

(a) Non-Competition. The Executive shall not, during the Restricted Period and within the Restricted Area (each as
defined in subsection (c) below), directly or indirectly, perform on behalf of any Competitor (as defined in subsection (c) below) the same or similar services as those that Executive performed for the Company during the Executive’s
employment by the Company or otherwise. In addition, the Executive shall not, during the Restricted Period or within the Restricted Area, directly or indirectly engage in, own, manage, operate, join, control, lend money or other assistance to, or
participate in or be connected with (as an officer, director, member, manager, partner, shareholder, consultant, employee, agent, or otherwise), any Competitor. 

(b) Non-Solicitation. During the Restricted Period, the Executive shall not, directly or indirectly, for himself or on
behalf of any Person (as defined in subsection (c) below), (i) solicit or attempt to solicit any Customers (as defined in subsection (c) below), or prospective Customers, with whom the Executive had contact at any time during the
Executive’s employment by the Company, or about whom the Executive learned Confidential Information; (ii) divert or attempt to divert any business of the Company to any other Person; (iii) solicit or attempt to solicit for employment,
endeavor to entice away from the Company, recruit, hire, or otherwise interfere with the Company’s relationship with, any Person who is employed by or otherwise engaged to perform services for the Company (or was employed or otherwise engaged
to perform services for the Company, as of any given time, within the immediately preceding twenty-four (24) month period); (iv) cause or assist, or attempt to cause or assist, any employee or other

  
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service provider to leave the Company; or (v) otherwise interfere in any manner with the employment or business relationships of the Company or the business or operations then being
conducted by the Company. 
 (c) Definitions. For purposes of this Section 6, the following definitions
have the following meanings: 
 (i) “Competitor” means any Person that engages in a business that is the
same as, or similar to, the Company’s Business. 
 (ii) “Customer” means any Person which, as of any
given date, used or purchased or contracted to use or purchase any services or products from the Company within the immediately preceding twenty-four (24) month period. 

(iii) “Person” means any individual, corporation, partnership, joint venture, association, limited liability
company, joint-stock company, trust, or unincorporated organization, or any governmental agency, officer, department, commission, board, bureau, or instrumentality thereof. 

(iv) “Restricted Area” means, because the market for Company’s Business is global, or has the potential
of being global, and is not dependent upon the physical location or presence of the Company, the Executive, or any individual or entity that may be in violation of this Agreement, the broadest geographic region enforceable by law (excluding any
location where this type of restriction is prohibited by law) as follows: (A) everywhere in the world that has access to Company’s Business because of the availability of the Internet; (B) everywhere in the world that the Executive
has the ability to compete with Company’s Business through the Internet; (C) each state, commonwealth, territory, province and other political subdivision located in North America; (D) each state, commonwealth, territory and other
political subdivision of the United States of America; (E) any state in which the Executive has performed any services for the Company; (F) any geographical area in which the Company has performed any services or sold any products;
(G) any geographical area in which the Company or any of its subsidiaries have engaged in Company’s Business, which has resulted in aggregate sales revenues of at least $25,000 during any year in the five (5) year period immediately
preceding the commencement of the Restricted Period; (H) any state or other jurisdiction where the Company had an office at any time during the Executive’s employment by the Company; (I) within one hundred (100) miles of any
location in which the Company had an office at any time during the Executive’s employment by the Company; and (J) within one hundred (100) miles of any location in which the Executive provided services for the Company. 

(v) “Restricted Period” means the period of time during the Executive’s employment by the Company plus a
period of twelve (12) months from the Termination Date or Resignation Date, as applicable. In the event of a breach of this Agreement by the Executive, the Restricted Period will be extended automatically by the period of the breach. 

  
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 (d) Survival. The Executive’s obligations set forth in this
Section 6, and the Company’s rights and remedies with respect thereto, will remain in full force and effect during the Restricted Period and until full resolution of any dispute related to the performance of the Executive’s
obligations during the Restricted Period. 
 (e) Public Company Exception. The prohibitions contained in this
Section 6 do not prohibit the Executive’s ownership of stock which is publicly traded, provided that (1) the investment is passive, (2) the Executive has no other involvement with the company, (3) the Executive’s
interest is less than five (5%) percent of the shares of the company, and (4) the Executive makes full disclosure to the Company of the stock at the time that the Executive acquires the shares of stock. 

Section 7. Assignment of Inventions. Any and all inventions, improvements, discoveries, designs, works of authorship,
concepts or ideas, or expressions thereof, whether or not subject to patents, copyrights, trademarks or service mark protections, and whether or not reduced to practice, that are conceived or developed by the Executive while employed with the
Company and which relate to or result from the actual or anticipated business, work, research or investigation of the Company (collectively, “Inventions”), shall be the sole and exclusive property of the Company. The Executive shall
do all things reasonably requested by the Company to assign to and vest in the Company the entire right, title and interest to any such Inventions and to obtain full protection therefor. Notwithstanding the foregoing, the provisions of this
Agreement do not apply to an Invention for which no equipment, supplies, facility, or Confidential Information of the Company was used and which was developed entirely on the Executive’s own time, unless (a) the Invention relates
(i) to Company’s Business, or (ii) to the Company’s actual or demonstrably anticipated research or development, or (b) the Invention results from any work performed by the Executive for the Company.  

Section 8. Reasonableness; Remedies; Claims. 

(a) Reasonableness. The Executive has carefully considered the nature, extent and duration of the restrictions and
obligations contained in this Agreement, including, without limitation, the geographical coverage contained in Section 6 and the time periods contained in Section 5 and Section 6, and acknowledges and agrees that
such restrictions are fair and reasonable in all respects to protect the legitimate interests of the Company and that these restrictions are designed for the reasonable protection of Company’s Business. 

(b) Remedies. The Executive recognizes that any breach of this Agreement shall cause irreparable injury to the Company,
inadequately compensable in monetary damages. Accordingly, in addition to any other legal or equitable remedies that may be available to the Company, the Executive agrees that the Company shall be able to seek and obtain injunctive relief in the
form of a temporary restraining order, preliminary injunction, or permanent injunction, in each case without notice or bond, against Executive to enforce this Agreement. The Company shall not be required to demonstrate actual injury or damage to
obtain injunctive relief from the courts. To the extent that any 

  
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damages are calculable resulting from the breach of this Agreement, the Company shall also be entitled to recover damages, including, but not limited to, any lost profits of the Company and/or
its affiliates or subsidiaries. For purposes of this Agreement, lost profits of the Company shall be deemed to include all gross revenues resulting from any activity of the Executive in violation of this Agreement and all such revenues shall be held
in trust for the benefit of the Company. Any recovery of damages by the Company shall be in addition to and not in lieu of the injunctive relief to which the Company is entitled. In no event will a damage recovery be considered a penalty in
liquidated damages. In addition, in any action at law or in equity arising out of this Agreement, the prevailing party shall be entitled to recover, in addition to any damages caused by a breach of this Agreement, all costs and expenses, including,
but not limited to, reasonable attorneys’ fees, expenses, and court costs incurred by such party in connection with such action or proceeding. Without limiting the Company’s rights under this Section 7(b) or any other remedies
of the Company, if a court of competent jurisdiction determines that the Executive breached any of the provisions of Sections 5 or 6, the Company will have the right to cease making any payments or providing any benefits otherwise
due to the Executive under the terms and conditions of this Agreement. 
 (c) Claims by the Executive. The Executive
acknowledges and agrees that any claim or cause of action by the Executive against the Company shall not constitute a defense to the enforcement of the restrictions and covenants set forth in this Agreement and shall not be used to prohibit
injunctive relief. 
 Section 9. Nonassignability, Binding Agreement. 

(a) By the Executive. The Executive shall not assign, transfer or delegate this Agreement or any right, duty,
obligation, or interest under this Agreement without the Company’s prior written consent; provided, however, that nothing shall preclude the Executive from designating beneficiaries to receive compensation or benefits, if any, payable under
this Agreement upon his death. 
 (b) By the Company. The Company shall not assign, transfer or delegate this
Agreement or any right, duty, obligation or intent under this Agreement without the Executive’s prior written consent; provided, however, that the Company may assign this Agreement and all of its rights and obligations hereunder to any person
who or entity that shall acquire all or substantially all of the assets and properties of the Company in a bona fide sale transaction. 

(c) Binding Effect. This Agreement shall be binding upon and inure to the benefit of the parties, any successors or
assigns of the Company and the Executive’s heirs and the personal representative(s) or executor(s) of the Executive’s estate. 

  
 -12- 

 Section 10. Definitions. The following capitalized terms shall have,
throughout this Agreement, the following meanings: 
 (a) “Resignation Date” shall mean the date specified
in the Resignation Notice, or the actual date the Executive terminates employment with the Company as the result of a resignation as provided in whichever occurs earlier. 

(b) “Termination Date” shall mean the actual date the Executive ceases to be employed with the Company as a
result of action taken by the Company, and not as a result of Executive’s resignation from employment. 
 Section 11.
Judicial Modification and Severability. Executive agrees that if a court of competent jurisdiction should determine that any phrase or provision in this Agreement is invalid or unenforceable as written for any reason, the court shall
modify and enforce any such phrase or provision to the maximum extent reasonably necessary to protect the Company’s legitimate business interests, so long as the modification does not render the phrase or provision more restrictive with regard
to Executive than originally drafted. Executive further agrees that if such modification of a phrase or provision that is invalid or unenforceable as written is legally impossible, the Court shall sever any such phrase or provision from this
Agreement, and that the enforceability of all other provisions of this Agreement shall not be affected, but shall otherwise remain in full force and effect. 

Section 12. Amendment. This Agreement may not be modified, amended, or waived in any manner except by a written instrument
signed by both parties to this Agreement. 
 Section 13. Waiver. The waiver by any party of compliance by any other party
with any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement (whether or not similar), or a continuing waiver or a waiver of any subsequent breach by a party of a provision of this
Agreement. Performance by any of the parties of any act not required of it under the terms and conditions of this Agreement shall not constitute a waiver of the limitations on its obligations under this Agreement, and no performance shall estop that
party from asserting those limitations as to any further or future performance of its obligations. 
 Section 14.
Governing Law and Forum. This Agreement shall be governed, construed and enforced in accordance with the laws of the State of Illinois, without regard to principles of conflict of laws of such State. Any action to enforce this
Agreement shall be brought solely in the state or federal courts located in the City of Chicago, Illinois. 
 Section 15.
Notices. All notices required or desired to be given under this Agreement shall be in writing and shall be deemed to have been given if delivered in person and receipted for by the party to whom the notice is directed; mailed by certified
or registered United States mail postage prepaid, not later than the day upon which the notice is required to be given pursuant to this Agreement; or delivered by expedited courier, shipping prepaid or mailed to sender, on the next business day,
after the date on which it is so sent, and addressed as follows: 
  

			
	If to the Company, to:		Board of Directors
			Rubicon Technology, Inc.
			900 East Green Street, Unit A
			Bensenville, IL 60106

  
 -13- 

			
	If to the Executive, to:		William F. Weissman
			26W156 Jerome Ave
			Wheaton, IL 60187

 Either party may, by giving written notice to the other party, change the address to which notice shall then
be sent. 
 Section 16. Prior Agreements. This Agreement is a complete and total integration of the understanding of the
parties related to the Executive’s employment with the Company and supersedes all prior or contemporaneous negotiations, commitments, agreements, writings, and discussions with respect to the subject matter of this Agreement, including the
Executive’s previous Employment Agreement with the Company, dated as of July 30, 2007, as amended.  
 Section 17.
Headings. The headings of the sections of this Agreement are inserted solely for convenience of reference and shall not be deemed to affect the meaning or interpretation of this Agreement. 

Section 18. Counterparts. This Agreement may be executed in two (2) counterparts, each of which shall be deemed to be
an original, but both of which together shall constitute one and the same Agreement. 
 Section 19. Statutory and Common
Law Duties. The duties the Executive owes to the Company under this Agreement shall be deemed to include federal and state statutory and common law obligations of the Executive, and do not in any way supersede or limit any of the obligations
or duties the Executive owes to the Company. This Agreement is intended, among other things, to supplement the provisions of the Illinois Uniform Trade Secrets Act, as enacted and amended from time to time.  

Section 20. Executive Acknowledgments. 

(a) The Executive Has Read the Document. The Executive acknowledges and agrees that he has carefully read this entire
Agreement and has been given sufficient opportunity to discuss this Agreement with the Company before signing. 
 (b) The
Executive Has Had an Opportunity to Consult with Others. The Executive acknowledges and agrees that he has been given an adequate opportunity to consult with his lawyer, accountant, tax advisor, spouse and other persons he deems appropriate
concerning this Agreement and the terms and conditions hereof. 
 (c) Executive Has a Copy. The Executive acknowledges
and agrees that he has been given a copy of this Agreement. 
 (d) Signing is Acceptance. By signing, the Executive
agrees to accept all of the terms and conditions of this Agreement and understands that the Company is relying upon the Executive’s stated acceptance of such terms and conditions. 

[SIGNATURE PAGE FOLLOWS] 

  
 -14- 

 IN WITNESS WHEREOF, the parties have executed this Agreement as of the Effective Date. 

 

							
	“COMPANY”				“EXECUTIVE”
			
	RUBICON TECHNOLOGY, INC.				
				
	By:		 /s/ Don Aquilano
				 /s/ William F. Weissman

			Don Aquilano, Chairman of the Board of Directors				William F. Weissman

  
 -15-EX-10.2

 Exhibit 10.2 

EXECUTIVE EMPLOYMENT AGREEMENT 

THIS Executive Employment Agreement (“Agreement”) is made and entered into as of February 18, 2015 (the
“Effective Date”), by and between Rubicon Technology, Inc., a Delaware corporation (the “Company”), and Mardel A. Graffy, a resident of the State of Illinois (the “Executive”). 

PRELIMINARY STATEMENTS 

The Company is in the business of providing material science solutions of sapphire and other advanced technology materials for the
Opto-electrics Semiconductor Fabrication, Optical and Laser and Telecommunications Marketplaces (“Company’s Business”); provided, however, the term shall be deemed amended to reflect any actual change in the
Company’s Business after the date hereof but prior to the day following the date on which Executive shall cease to be employed by the Company (as reflected in the minutes of the Board of Directors of the Company prior to the Termination Date
(as defined below) or the Resignation Date (as defined below), as applicable). 
 As a result of Executive’s previous employment as the
Company’s Vice President – Finance, among other positions, and her current employment as the Company’s Chief Financial Officer (“CFO”) and Secretary, the Executive is well acquainted with the affairs of the Company
and its personnel, services, products, and business practices and relationships and other Confidential Information (as defined in Section 5 below). This Agreement is entered into for, among other things, the protection of the
Company’s business relationships, goodwill and going business value and the prevention of the unauthorized use or disclosure of any Confidential Information by the Executive. 

Capitalized terms used herein, but not otherwise defined, shall have the meanings ascribed to such terms in the Company’s 2007 Stock
Incentive Plan, as amended (the “Plan”). 
 AGREEMENT 

In consideration of the premises and the mutual promises and covenants contained in this Agreement and other good and valuable consideration,
the receipt and sufficiency of which is hereby acknowledged, the parties hereto agree as follows: 
 Section 1. Employment and
Duties. 
 (a) Employment Duties. Throughout the Employment Term (as defined in Section 2 below),
the Executive shall serve as the CFO and Secretary of the Company, and shall report to the President and Chief Executive Officer of the Company (the “CEO”). Throughout the Employment Term, the Executive shall: (i) devote her
working hours, on a full-time basis, to her duties and responsibilities to the Company; (ii) faithfully and loyally serve the Company; (iii) comply in all material respects with all 

 
lawful directions and instructions given to her by the CEO and the Board of Directors (the “Board”); and (iv) use her best efforts to promote and serve the interests of the
Company. The Executive shall comply in all material respects with all applicable laws, rules and regulations relating to the performance of the Executive’s duties and responsibilities hereunder. 

(b) Exclusive Employment. Throughout the Employment Term, the Executive shall not render her services, directly or
indirectly, to any person or entity other than the Company without the prior consent of the Board, which may be withheld or granted by the Board in its sole discretion. The Executive shall not engage in any activity which would materially interfere
with the faithful and timely performance of her duties under this Agreement; provided, however, the Executive may, subject to the prior consent of the Board, which shall not be unreasonably withheld, serve as a director of any other
company, so long as such service does not unreasonably and materially interfere with the timely performance of the Executive’s duties under this Agreement. 

Section 2. Employment Term. The Executive’s employment as the Chief Financial Officer and Secretary commenced on
December 9, 2014 and shall continue thereafter unless and until her employment is terminated pursuant to the terms of this Agreement. As used herein, “Employment Term” shall mean the actual period of time during which the
Executive is employed by the Company under the terms and conditions of this Agreement. 
 Section 3. Compensation and
Other Benefits. During the Employment Term, the Company shall pay and provide the following compensation and other benefits to the Executive as full compensation for all services rendered by the Executive to the Company: 

(a) Annual Salary. The Executive’s annual salary shall be Two Hundred Thousand Dollars ($200,000.00) (the
“Annual Salary”), which shall be retroactive to January 1, 2015. The Annual Salary shall be paid in accordance with the then-prevailing payroll practices of the Company, less applicable taxes, payroll deductions and
withholdings required by law. The Board shall review the Annual Salary on an annual basis and make appropriate adjustments thereto from time to time; provided that the Annual Salary shall not be reduced below $200,000 without the Executive’s
prior written consent. 
 (b) Bonuses. 

(i) In 2015, the Executive shall be eligible to receive a bonus of Sixty Thousand Dollars ($60,000.00) based upon the
achievement of certain objectives and criteria mutually agreed upon by the Board and the Executive (the “Cash Bonus”). The Board and the Executive shall agree upon the bonus objectives and criteria for the Cash Bonus no later than
March 31, 2015. The Cash Bonus, if achieved by Executive, will be paid no later than March 31, 2016, and shall be subject to applicable taxes, payroll deductions, and withholdings required by law. For years after 2015, the Board shall
review the Executive’s eligibility for similar bonuses based upon the achievement of certain objectives and criteria mutually agreed upon by the Board and the Executive. 

(ii) The Board, in its sole discretion, may determine to pay Executive a discretionary cash bonus (the “Discretionary
Bonus”). If paid, the Discretionary Bonus shall be subject to applicable taxes, payroll deductions, and withholdings required by law. 

  
 -2- 

 (c) Equity. 

(i) Nonstatutory Stock Options. On December 1, 2015, the Company shall grant Executive Nonstatutory Stock Options
under the Plan. The number of Options so granted shall reflect the number of whole Options nearest the target value of One Hundred Thousand Dollars ($100,000.00), determined using the Fair Market Value per Share as determined under the Plan as of
the date of grant. The grant of such Nonstatutory Stock Options shall be evidenced by an Option Agreement which shall set forth the 10-year term of the Option, the exercise price, the applicable four year ratable vesting period (with immediate,
accelerated full vesting upon a Change in Control), a 12-month period of exercise of the Options following the death of the Executive and all other conditions for the vesting or exercise of such Nonstatutory Stock Options. 

(ii) Performance-Based Restricted Stock Units. Upon the execution of this Agreement, the Company shall grant
Executive Restricted Stock Units pursuant to the terms of the Plan. The number of Restricted Stock Units so granted shall reflect the number of whole Shares nearest the target value of Fifty Thousand Dollars ($50,000.00), determined using the Fair
Market Value per Share as determined under the Plan as of the date of grant. The grant of such Restricted Stock Units shall be evidenced by an Award Agreement which shall set forth the vesting conditions for the award, including, but not
limited to, the applicable performance period, the performance metrics and any continued service required for the vesting of the Award. The Compensation Committee of the Board shall approve such performance metrics no later than March 31,
2015. The Award shall become fully vested upon a Change in Control. 
 (d) Employee Benefit Plans. The Executive shall be eligible to
participate in all employee benefit plans offered by the Company, but participation shall be subject to all of the terms and conditions of such plans applicable to all such employees, including all waiting periods, eligibility requirements,
contributions, exclusions and other similar conditions or limitations. 
 (e) Vacation. The Executive shall be entitled to accrue
twenty (20) vacation days per calendar year, which vacation days shall accrue proportionately throughout the year based on completed months of service. Any unused vacation days shall not be carried forward from one calendar year to the next.
For purposes of this Agreement, the term “Termination Vacation Pay” shall mean, at the time of a termination of the Executive’s employment hereunder, the payment due to the Executive at the rate of the Annual Salary in effect at that
time, on a daily basis, multiplied by the number of earned and unused vacation days for the then-current calendar year for the period between January 1 of such year and the Termination Date. 

  
 -3- 

 (f) Other Expenses. The Company shall reimburse the Executive for all reasonable and
ordinary out-of-pocket business expenses incurred by the Executive in the scope of her employment hereunder. The Executive shall submit itemized expense reports in order to obtain reimbursement of expenses and shall submit with such expense reports
such records and logs as may be required by the relevant taxing authorities for the substantiation of each such business expense as a deduction on the Company’s income tax returns. 

Section 4. Termination of Employment. The Executive’s employment with the Company shall be subject to termination as
follows: 
 (a) Termination for Cause. The Company may immediately terminate the Executive for Cause (as
defined below) by giving written notice to the Executive. In the event of a termination for Cause, the Executive shall be entitled to payment of (i) that portion of any of Executive’s Annual Salary that the Executive earned through and
including the Termination Date, at the rate of the Annual Salary in effect at that time, (ii) any Termination Vacation Pay, and (iii) any bonus earned prior to the Termination Date that remains unpaid, subject to any offset or recoupment
rights of the Company and any other rights or remedies applicable to any breach of this Agreement by the Executive prior to the Termination Date. Except as provided herein or required by applicable law, the Executive shall not be entitled to any
other compensation or benefits. Termination for “Cause” shall mean termination by the Board of the Executive’s employment with the Company, after a good faith determination by the Board at a meeting called and held for that
purpose, or in a written consent to resolutions signed by all members of the Board, and after reasonable notice to the Executive, that the Executive: 

(i) has willfully engaged in misconduct materially and adversely affecting the Company; 

(ii) engaged in theft, fraud, embezzlement or similar behavior; 

(iii) has been indicted or convicted of a felony; or 

(iv) has willfully continued, after a correction period, to fail to substantially perform the material duties of
Executive’s position with the Company (other than failure resulting from incapacity due to physical or mental illness). The correction period shall last not less than ten (10) days after the Company provides Executive with written notice
of Executive’s failure to substantially perform Executive’s material duties. 
 (b) Termination Without
Cause. The Company may, in its sole discretion, terminate the Executive without Cause, by providing written notice to the Executive (the “Termination Notice”) at least thirty (30) calendar days prior to the Termination
Date. In the event of a termination without Cause, the Executive shall be entitled to: (i) payment of that portion of any Executive’s Annual Salary that the Executive earned through and 

  
 -4- 

 
including the Termination Date, at the rate of the Annual Salary in effect at that time; (ii) any Termination Vacation Pay; (iii) any bonus earned prior to the Termination Date that
remains unpaid; (iv) payment of Executive’s Annual Salary, at the rate of the Annual Salary in effect at that time, commencing on the Termination Date and continuing for the six (6) month period thereafter; (v) immediate vesting
of any Options granted pursuant to Section 3(c)(i) and immediate vesting of any Restricted Stock Units granted pursuant to Section 3(c)(ii); and (vi) immediate vesting of any other Options granted by the Company to the
Executive; provided, however, that the Executive executes and delivers to the Company a complete release agreement in form and substance reasonably acceptable to the Company. In addition, the Company shall be obligated to continue any
health and welfare benefits provided to the Executive under Section 3(d) throughout the period commencing on the Termination Date and continuing for a six (6) month period thereafter. Except as provided herein or required by
applicable law, the Executive shall not be entitled to any other compensation or benefits. With respect to Section 4(b)(iv) above, such payments shall be paid in accordance with the then-prevailing payroll practices of the Company, less
applicable taxes, payroll deductions and withholdings required by law. 
 (c) Resignation. The Executive may resign
from her employment with the Company at any time by providing written notice to the Company thirty (30) calendar days prior to the Resignation Date. In the event of resignation, the Executive shall be entitled to payment of that portion of the
Executive’s Annual Salary that the Executive earned through and including the Resignation Date, at the rate of the Annual Salary in effect at that time, any Termination Vacation Pay and any bonus earned prior to the Resignation Date that
remains unpaid. Except as provided herein (including, without limitation, in Section 4(d)) or required by applicable law, the Executive shall not be entitled to any other compensation or benefits. 

(d) Resignation for Good Reason. Notwithstanding Section 4(c), the Executive may terminate her employment by
the Company for Good Reason (as defined below) by providing written notice thereof to the Company (the “Resignation Notice”) at least thirty (30) days prior to the Resignation Date, which notice shall set forth in reasonable
detail the nature of the facts and circumstances which constitute “Good Reason” (as defined below) and Company shall have thirty (30) days after receipt of the Resignation Notice to cure in all material respects the facts and
circumstances which constitute Good Reason. In the event of a termination for Good Reason, the Executive shall be entitled to: (i) payment of that portion of the Executive’s Annual Salary that the Executive earned through and including the
Resignation Date, at the rate of the Annual Salary in effect at that time; (ii) any Termination Vacation Pay; (iii) any bonus earned prior to the Resignation Date that remains unpaid; (iv) payment of Executive’s Annual Salary, at
the rate of the Annual Salary in effect at that time, commencing on the Resignation Date and continuing for the six (6) month period thereafter; (v) immediate vesting of any Options granted pursuant to Section 3(c)(i) and
immediate vesting of any Restricted Stock Units granted pursuant to Section 3(c)(ii); and (vi) immediate vesting of any other Options granted by the Company to the Executive; provided, however, that the Executive
executes and delivers to the Company a complete release agreement in form and substance reasonably acceptable to the Company. In addition, the Company shall be 

  
 -5- 

 
obligated to continue any health and welfare benefits provided to the Executive under Section 3(d) throughout the period commencing on the Termination Date and continuing for a six
(6) month period thereafter. Except as provided herein or required by applicable law, the Executive shall not be entitled to any other compensation or benefits. With respect to Section 4(d)(iv) above, such payments shall be paid in
accordance with the then-prevailing payroll practices of the Company, less applicable taxes, payroll deductions and withholdings required by law. 

For purposes of this Agreement, “Good Reason” means the resignation of the Executive’s employment by the
Company by the Executive, because of (A) any reduction in the Executive’s Annual Salary then in effect in a manner that is not permitted under Section 3(a) hereof, (B) a substantial diminution in the duties,
responsibilities or titles of the Executive, but only if uncured in accordance with the foregoing provisions hereof, or (C) being required by the Board to relocate (for a period longer than six (6) consecutive months) greater than 100
miles from the Chicago, Illinois metropolitan area in order to maintain employment with the Company pursuant to this Agreement. 

(e) Termination Subsequent To A Change In Control. Notwithstanding anything to the contrary herein, in the event that
the Company, at any time within two (2) years after a Change in Control, terminates the Executive without Cause or the Executive resigns with Good Reason, the Executive shall be entitled to the payments and benefits set forth in
Section 4(b) or 4(d), as the case may be, except that, in lieu of the payment pursuant to Section 4(b)(iv) and 4(d)(iv), the Company shall pay to the Executive a lump sum payment within thirty (30) days of
the Termination Date or Resignation Date, as applicable. The lump sum payment shall be equal to fifty (50) percent of the Executive’s Annual Salary at the time of the Termination Date or Resignation Date, as the case may be, less all
applicable taxes, payroll deductions and withholdings required by law. In addition, any unvested options under any then-existing Option Agreement shall immediately be fully vested and exercisable by the Executive. 

Notwithstanding the preceding sentence, if the independent accountants acting as auditors for the Company on the date of the
Change in Control determine that such single payment, together with other compensation received by the Executive, would constitute “excess parachute payments” within the meaning of Section 280G of the Internal Revenue Code of 1986, as
amended, and regulations thereunder, the single payment to the Executive shall be reduced to the maximum amount which may be paid without such payments in the aggregate constituting “excess parachute payments,” provided that such amount
shall not be reduced below the payment as set forth in Section 4(b)(iv) or 4(d)(iv) as referenced above. 

(f) Death. If the Executive dies, her employment with the Company and this Agreement shall automatically terminate on
the date of her death. The Executive’s estate or personal representative shall be entitled to receive that portion of the Annual Salary that the Executive earned through and including the date of the Executive’s death, at the rate of the
Annual Salary in effect at that time, any Termination Vacation Pay and any bonus earned prior to the date of the Executive’s death that remains unpaid. Except as provided herein or required by applicable law, neither the Executive’s estate
nor her personal representative shall be entitled to any other compensation or benefits. 

  
 -6- 

 (g) Disability. The Executive shall be deemed “Permanently
Disabled” when she has suffered any medically determinable physical or mental illness, injury or infirmity that prevents the Executive from performing her responsibilities under this Agreement and which disability has lasted or that the
Board in good faith has determined can be expected to last for a continuous period of not less than 120 calendar days. The Board has the discretion to determine whether the Executive is disabled and that determination shall be binding and conclusive
on the Executive (and any guardians or representatives for her). If the Executive becomes Permanently Disabled, the Company may terminate the Executive’s employment with the Company as a result of the Permanent Disability by providing written
notice to the Executive thirty (30) calendar days prior to the Termination Date, or the Executive may resign from her employment with the Company by providing written notice to the Company thirty (30) calendar days prior to the Resignation
Date. If the Executive resigns from employment with the Company as a result of a Permanent Disability or the Company terminates the Executive’s employment as a result of a Permanent Disability, the Executive shall be entitled to receive that
portion of the Annual Salary, at the rate in effect when she became Permanently Disabled, that she earned through and including the Termination Date or Resignation Date, as applicable, less any amounts the Executive is entitled to receive
under any disability insurance policy maintained by the Company, any Termination Vacation Pay and any bonus earned prior to the Termination Date or Resignation Date, as applicable, that remains unpaid. Except as provided herein or required by
applicable law, the Executive shall not be entitled to any other compensation or benefits. 
 (h) Savings Clause. This
paragraph 4(h) shall apply for so long as the Executive is a “specified employee” for purposes of Section 409A of the Code. The determination of whether the Executive is a “specified employee” shall be made in accordance
with the policy of the Company or, if none, under the default rules in Section 1.409A-1(i) of the Treasury Regulations. Any amount otherwise payable to the Executive on account of the Executive’s separation from service as defined in
Section 1.409A-1(h) of the Treasury Regulations that exceeds the limit provided in Section 1.409A-1(b)(9)(iii) of the Treasury Regulations shall not be paid before the date which is six (6) months and a day after the date of the
Executive’s separation from service (or, if earlier, the date of the Executive’s death). Upon the expiration of the six-month deferral period referred to in the preceding sentence or the Executive’s death, all payments deferred
pursuant to the preceding sentence shall be paid to the Executive (or the Executive’s estate in the event of the Executives death) in a lump sum. 

Section 5. Confidentiality. For purposes of this Section 5, the term “Company” shall include,
in addition to the Company, its affiliates, subsidiaries and any of their respective predecessors, successors and assigns. 

(a) Confidential Information. As used in this Agreement, “Confidential Information” means any and all
confidential, proprietary or other information, whether or not originated by the Executive or the Company, which is in any way related to the past 

  
 -7- 

 
or present Company’s Business and is either designated as confidential or not generally known by or available to the public. Confidential Information includes, but is not limited to (whether
or not reduced to writing or designated as confidential) (i) information regarding the Company’s existing and potential customers and vendors; (ii) any contracts (including the existence and contents thereof and parties thereto) to
which the Company is a party or is bound; (iii) information regarding products and services being purchased or leased by or provided to the Company; (iv) information received by the Company from third parties under an obligation of
confidentiality, restricted disclosure or restricted use; (v) personnel and financial information of the Company; (vi) information with respect to the Company’s products, services, facilities, business methods, systems, trade secrets,
technical know-how, and other intellectual property; (vii) marketing and developmental plans and techniques, price and cost data, forecasts and forecast assumptions, and potential strategies of the Company; and (viii) any other information
relating to the Company which was obtained by the Executive in connection with her employment by the Company, whether before, on or after the Effective Date. 

(b) Non-Disclosure and Non-Use of
Confidential Information. The Executive acknowledges that the Confidential Information of the Company is a valuable, unique asset of the Company and the Executive’s unauthorized use or disclosure thereof could cause irreparable harm to the
Company for which no remedy at law could be adequate. Accordingly, the Executive agrees that she shall hold all Confidential Information of the Company in strict confidence and solely for the benefit of the Company, and that, except as necessary in
the course of Executive’s duties as an employee of the Company, she shall not, directly or indirectly, disclose or use or authorize any third party to disclose or use any Confidential Information. The Executive shall follow all the Company
policies and procedures to protect all Confidential Information and take any additional precautions necessary to preserve and protect the use or disclosure of any Confidential Information at all times. 

(c) Ownership of Confidential Information. The Executive acknowledges and agrees that all Confidential Information is
and shall remain the exclusive property of the Company, whether or not prepared in whole or in part by the Executive and whether or not disclosed to or entrusted to the custody of the Executive. Upon the termination or resignation of her employment
by the Company, or at any other time at the request of the Company, the Executive shall promptly deliver to the Company all documents, tapes, disks, or other storage media and any other materials, and all copies thereof in whatever form, in the
possession of the Executive pertaining to the Company’s Business, including, but not limited to, any containing Confidential Information. 

(d) Public Information. Notwithstanding anything contained in this Agreement to the contrary, information which is
generally available or accessible to the public shall be deemed Confidential Information of the Company if such information was retrieved, gathered, assembled or maintained by the Company in such a manner not available to the public or for a purpose
beneficial to the Company. From time to time, the Company may, for its own benefit, choose to place certain Confidential Information or records of the Company in the public domain. Notwithstanding anything contained in this Agreement to the
contrary, the fact that such Confidential Information may be made 

  
 -8- 

 
available to the public in a limited form and under limited circumstances does not change the confidential and proprietary nature of such information, and does not release the Executive from her
duties with respect to such Confidential Information as set forth in this Agreement. 
 (e) Survival. The
Executive’s obligations set forth in this Section 5, and the Company’s rights and remedies with respect hereto, shall indefinitely survive the termination of this Agreement and the Executive’s employment by the Company,
regardless of the reason therefor. 
 Section 6. Restrictive Covenants. For purposes of this Section 6, the
term “Company” shall include, in addition to the Company, its affiliates, subsidiaries and any of their respective predecessors, successors and assigns. 

(a) Non-Competition. The Executive shall not, during the Restricted Period and within the Restricted Area (each as
defined in subsection (c) below), directly or indirectly, perform on behalf of any Competitor (as defined in subsection (c) below) the same or similar services as those that Executive performed for the Company during the Executive’s
employment by the Company or otherwise. In addition, the Executive shall not, during the Restricted Period or within the Restricted Area, directly or indirectly engage in, own, manage, operate, join, control, lend money or other assistance to, or
participate in or be connected with (as an officer, director, member, manager, partner, shareholder, consultant, employee, agent, or otherwise), any Competitor. 

(b) Non-Solicitation. During the Restricted Period, the Executive shall not, directly or indirectly, for herself or on
behalf of any Person (as defined in subsection (c) below), (i) solicit or attempt to solicit any Customers (as defined in subsection (c) below), or prospective Customers, with whom the Executive had contact at any time during the
Executive’s employment by the Company, or about whom the Executive learned Confidential Information; (ii) divert or attempt to divert any business of the Company to any other Person; (iii) solicit or attempt to solicit for employment,
endeavor to entice away from the Company, recruit, hire, or otherwise interfere with the Company’s relationship with, any Person who is employed by or otherwise engaged to perform services for the Company (or was employed or otherwise engaged
to perform services for the Company, as of any given time, within the immediately preceding twenty-four (24) month period); (iv) cause or assist, or attempt to cause or assist, any employee or other service provider to leave the Company;
or (v) otherwise interfere in any manner with the employment or business relationships of the Company or the business or operations then being conducted by the Company. 

(c) Definitions. For purposes of this Section 6, the following definitions have the following meanings: 

(i) “Competitor” means any Person that engages in a business that is the same as, or similar to, the
Company’s Business. 

  
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 (ii) “Customer” means any Person which, as of any given date,
used or purchased or contracted to use or purchase any services or products from the Company within the immediately preceding twenty-four (24) month period. 

(iii) “Person” means any individual, corporation, partnership, joint venture, association, limited liability
company, joint-stock company, trust, or unincorporated organization, or any governmental agency, officer, department, commission, board, bureau, or instrumentality thereof. 

(iv) “Restricted Area” means, because the market for Company’s Business is global, or has the potential
of being global, and is not dependent upon the physical location or presence of the Company, the Executive, or any individual or entity that may be in violation of this Agreement, the broadest geographic region enforceable by law (excluding any
location where this type of restriction is prohibited by law) as follows: (A) everywhere in the world that has access to Company’s Business because of the availability of the Internet; (B) everywhere in the world that the Executive
has the ability to compete with Company’s Business through the Internet; (C) each state, commonwealth, territory, province and other political subdivision located in North America; (D) each state, commonwealth, territory and other
political subdivision of the United States of America; (E) any state in which the Executive has performed any services for the Company; (F) any geographical area in which the Company has performed any services or sold any products;
(G) any geographical area in which the Company or any of its subsidiaries have engaged in Company’s Business, which has resulted in aggregate sales revenues of at least $25,000 during any year in the five (5) year period immediately
preceding the commencement of the Restricted Period; (H) any state or other jurisdiction where the Company had an office at any time during the Executive’s employment by the Company; (I) within one hundred (100) miles of any
location in which the Company had an office at any time during the Executive’s employment by the Company; and (J) within one hundred (100) miles of any location in which the Executive provided services for the Company. 

(v) “Restricted Period” means the period of time during the Executive’s employment by the Company plus a
period of twelve (12) months from the Termination Date or Resignation Date, as applicable. In the event of a breach of this Agreement by the Executive, the Restricted Period will be extended automatically by the period of the breach. 

(d) Survival. The Executive’s obligations set forth in this Section 6, and the Company’s rights
and remedies with respect thereto, will remain in full force and effect during the Restricted Period and until full resolution of any dispute related to the performance of the Executive’s obligations during the Restricted Period. 

(e) Public Company Exception. The prohibitions contained in this Section 6 do not prohibit the
Executive’s ownership of stock which is publicly traded, provided that (1) the investment is passive, (2) the Executive has no other involvement with the 

  
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company, (3) the Executive’s interest is less than five (5%) percent of the shares of the company, and (4) the Executive makes full disclosure to the Company of the stock at
the time that the Executive acquires the shares of stock. 
 Section 7. Assignment of Inventions. Any and all inventions,
improvements, discoveries, designs, works of authorship, concepts or ideas, or expressions thereof, whether or not subject to patents, copyrights, trademarks or service mark protections, and whether or not reduced to practice, that are conceived or
developed by the Executive while employed with the Company and which relate to or result from the actual or anticipated business, work, research or investigation of the Company (collectively, “Inventions”), shall be the sole and
exclusive property of the Company. The Executive shall do all things reasonably requested by the Company to assign to and vest in the Company the entire right, title and interest to any such Inventions and to obtain full protection therefor.
Notwithstanding the foregoing, the provisions of this Agreement do not apply to an Invention for which no equipment, supplies, facility, or Confidential Information of the Company was used and which was developed entirely on the Executive’s own
time, unless (a) the Invention relates (i) to Company’s Business, or (ii) to the Company’s actual or demonstrably anticipated research or development, or (b) the Invention results from any work performed by the
Executive for the Company.  
 Section 8. Reasonableness; Remedies; Claims. 

(a) Reasonableness. The Executive has carefully considered the nature, extent and duration of the restrictions and
obligations contained in this Agreement, including, without limitation, the geographical coverage contained in Section 6 and the time periods contained in Section 5 and Section 6, and acknowledges and agrees that
such restrictions are fair and reasonable in all respects to protect the legitimate interests of the Company and that these restrictions are designed for the reasonable protection of Company’s Business. 

(b) Remedies. The Executive recognizes that any breach of this Agreement shall cause irreparable injury to the Company,
inadequately compensable in monetary damages. Accordingly, in addition to any other legal or equitable remedies that may be available to the Company, the Executive agrees that the Company shall be able to seek and obtain injunctive relief in the
form of a temporary restraining order, preliminary injunction, or permanent injunction, in each case without notice or bond, against Executive to enforce this Agreement. The Company shall not be required to demonstrate actual injury or damage to
obtain injunctive relief from the courts. To the extent that any damages are calculable resulting from the breach of this Agreement, the Company shall also be entitled to recover damages, including, but not limited to, any lost profits of the
Company and/or its affiliates or subsidiaries. For purposes of this Agreement, lost profits of the Company shall be deemed to include all gross revenues resulting from any activity of the Executive in violation of this Agreement and all such
revenues shall be held in trust for the benefit of the Company. Any recovery of damages by the Company shall be in addition to and not in lieu of the injunctive relief to which the Company is entitled. In no event will a damage recovery be
considered a penalty in liquidated damages. In addition, in any action at law or in equity arising out of this Agreement, the prevailing party shall be entitled to recover, in addition to any damages caused by a breach of this

  
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Agreement, all costs and expenses, including, but not limited to, reasonable attorneys’ fees, expenses, and court costs incurred by such party in connection with such action or proceeding.
Without limiting the Company’s rights under this Section 7(b) or any other remedies of the Company, if a court of competent jurisdiction determines that the Executive breached any of the provisions of Sections 5 or 6,
the Company will have the right to cease making any payments or providing any benefits otherwise due to the Executive under the terms and conditions of this Agreement. 

(c) Claims by the Executive. The Executive acknowledges and agrees that any claim or cause of action by the Executive
against the Company shall not constitute a defense to the enforcement of the restrictions and covenants set forth in this Agreement and shall not be used to prohibit injunctive relief. 

Section 9. Nonassignability, Binding Agreement. 

(a) By the Executive. The Executive shall not assign, transfer or delegate this Agreement or any right, duty,
obligation, or interest under this Agreement without the Company’s prior written consent; provided, however, that nothing shall preclude the Executive from designating beneficiaries to receive compensation or benefits, if any, payable under
this Agreement upon her death. 
 (b) By the Company. The Company shall not assign, transfer or delegate this
Agreement or any right, duty, obligation or intent under this Agreement without the Executive’s prior written consent; provided, however, that the Company may assign this Agreement and all of its rights and obligations hereunder to any person
who or entity that shall acquire all or substantially all of the assets and properties of the Company in a bona fide sale transaction. 

(c) Binding Effect. This Agreement shall be binding upon and inure to the benefit of the parties, any successors or
assigns of the Company and the Executive’s heirs and the personal representative(s) or executor(s) of the Executive’s estate. 

Section 10. Definitions. The following capitalized terms shall have, throughout this Agreement, the following meanings:

 (a) “Resignation Date” shall mean the date specified in the Resignation Notice, or the actual date
the Executive terminates employment with the Company as the result of a resignation as provided in whichever occurs earlier. 

(b) “Termination Date” shall mean the actual date the Executive ceases to be employed with the Company as a
result of action taken by the Company, and not as a result of Executive’s resignation from employment. 
 Section 11.
Judicial Modification and Severability. Executive agrees that if a court of competent jurisdiction should determine that any phrase or provision in this Agreement is invalid or unenforceable as written for any reason, the court shall
modify and enforce any such phrase or provision to the maximum extent reasonably necessary to protect the Company’s legitimate business interests, so long as the modification does not render the phrase or provision

  
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more restrictive with regard to Executive than originally drafted. Executive further agrees that if such modification of a phrase or provision that is invalid or unenforceable as written is
legally impossible, the Court shall sever any such phrase or provision from this Agreement, and that the enforceability of all other provisions of this Agreement shall not be affected, but shall otherwise remain in full force and effect. 

Section 12. Amendment. This Agreement may not be modified, amended, or waived in any manner except by a written instrument
signed by both parties to this Agreement. 
 Section 13. Waiver. The waiver by any party of compliance by any
other party with any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement (whether or not similar), or a continuing waiver or a waiver of any subsequent breach by a party of a provision
of this Agreement. Performance by any of the parties of any act not required of it under the terms and conditions of this Agreement shall not constitute a waiver of the limitations on its obligations under this Agreement, and no performance shall
estop that party from asserting those limitations as to any further or future performance of its obligations. 
 Section 14.
Governing Law and Forum. This Agreement shall be governed, construed and enforced in accordance with the laws of the State of Illinois, without regard to principles of conflict of laws of such State. Any action to enforce this Agreement
shall be brought solely in the state or federal courts located in the City of Chicago, Illinois. 
 Section 15.
Notices. All notices required or desired to be given under this Agreement shall be in writing and shall be deemed to have been given if delivered in person and receipted for by the party to whom the notice is directed; mailed by certified
or registered United States mail postage prepaid, not later than the day upon which the notice is required to be given pursuant to this Agreement; or delivered by expedited courier, shipping prepaid or mailed to sender, on the next business day,
after the date on which it is so sent, and addressed as follows: 
  

			
	If to the Company, to:		Board of Directors
			Rubicon Technology, Inc.
			900 East Green Street, Unit A
			Bensenville, IL 60106
		
	If to the Executive, to:		Mardel A. Graffy
			11225 Tecumseh Lane
			Indian Head Park IL 60525

 Either party may, by giving written notice to the other party, change the address to which notice shall then
be sent. 
 Section 16. Prior Agreements. This Agreement is a complete and total integration of the understanding of the
parties related to the Executive’s employment with the Company and supersedes all prior or contemporaneous negotiations, commitments, agreements, writings, and discussions with respect to the subject matter of this Agreement.  

  
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 Section 17. Headings. The headings of the sections of this Agreement are
inserted solely for convenience of reference and shall not be deemed to affect the meaning or interpretation of this Agreement. 

Section 18. Counterparts. This Agreement may be executed in two (2) counterparts, each of which shall be deemed to be
an original, but both of which together shall constitute one and the same Agreement. 
 Section 19. Statutory and Common
Law Duties. The duties the Executive owes to the Company under this Agreement shall be deemed to include federal and state statutory and common law obligations of the Executive, and do not in any way supersede or limit any of the obligations
or duties the Executive owes to the Company. This Agreement is intended, among other things, to supplement the provisions of the Illinois Uniform Trade Secrets Act, as enacted and amended from time to time.  

Section 20. Executive Acknowledgments. 

(a) The Executive Has Read the Document. The Executive acknowledges and agrees that she has carefully read this entire
Agreement and has been given sufficient opportunity to discuss this Agreement with the Company before signing. 
 (b) The
Executive Has Had an Opportunity to Consult with Others. The Executive acknowledges and agrees that she has been given an adequate opportunity to consult with her lawyer, accountant, tax advisor, spouse and other persons she deems appropriate
concerning this Agreement and the terms and conditions hereof. 
 (c) Executive Has a Copy. The Executive acknowledges
and agrees that she has been given a copy of this Agreement. 
 (d) Signing is Acceptance. By signing, the Executive
agrees to accept all of the terms and conditions of this Agreement and understands that the Company is relying upon the Executive’s stated acceptance of such terms and conditions. 

[SIGNATURE PAGE FOLLOWS] 

  
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 IN WITNESS WHEREOF, the parties have executed this Agreement as of the Effective Date. 

 

							
	“COMPANY”				“EXECUTIVE”
			
	RUBICON TECHNOLOGY, INC.				
				
	By:		 /s/ Don Aquilano
				 /s/ Mardel A. Graffy

			Don Aquilano, Chairman of the Board of Directors				Mardel A. Graffy

  
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