Document:

Severance Agreement

 EXHIBIT 10.23 
 SEVERANCE AGREEMENT 
 THIS SEVERANCE AGREEMENT is made and entered into as of January 16, 1993, by and
between LUFKIN INDUSTRIES, INC., a Texas corporation (the “Company”) and DOUGLAS V. SMITH of Lufkin, Texas (the “Executive”). 
 WHEREAS, the Company currently employs the Executive as President and Chief Executive Officer, subject to the terms and conditions of an Employment Agreement of even date herewith (the “Employment Agreement”); and 
 WHEREAS, the board of directors of the Company (the “Board”) has determined that it is in the best interests of the Company and its
shareholders to provide certain terms and conditions of the Executive’s employment upon the occurrence of a “Change in Control”, as defined below, such terms and conditions being intended to apply independently of the Employment
Agreement; 
 NOW THEREFORE, in consideration of the premises and mutual covenants contained herein, and for other consideration mutually
acknowledged, the Company and the Executive (the “Parties”) agree as follows: 
  

	 	1.	Term. 

 The term of this Severance
Agreement (the “Term”) shall commence on the date first set forth above (the “Start Date”), and shall continue through December 31, 1995; provided, however, that on December 31, 1994 and on each succeeding 

 
December 31, the Term shall automatically extend for one calendar year, unless either party gives written notice to the contrary at least sixty
(60) days prior to the date the Agreement would otherwise be extended. Notwithstanding the above, if the Executive’s employment terminates for any reason prior to a Change in Control then, except as provided in Section 2(c), this
Agreement shall terminate. 
  

	 	2.	Employment. 

 (a) If, during the
Term, a Change in Control occurs while the Executive is employed by the Company, the Company shall continue to employ the Executive, and the Executive shall remain in employment, subject to this Agreement, for the period commencing on the Effective
Date (as defined below) and ending on the earlier of (A) the third anniversary of such date, or (B) the first day of the month coinciding with or next following the Executive’s Normal Retirement Date (the “Protection
Period”). 
 (b) For purposes of this Severance Agreement, the Effective Date shall be the date on which occurs the
earliest of the following events, each of which is hereinafter referred as a “Change in Control”: 
 (i) any
“person,” as such term is used in Section 13(d) and 14(d) of the Exchange Act (other than the Company, any trustee or other fiduciary holding securities under an executive benefit plan of the Company, or any company owned, directly or
indirectly, by the shareholders of the Company in 

  

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substantially the same proportions as their ownership of stock of the Company) together with its “Affiliates” and “Associates”, as such
term is defined in Rule 12b-2 of the Exchange Act, is or becomes the “beneficial owner” (as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the Company representing 25% or more of the Company’s
common stock or of the combined voting power of the Company’s then outstanding securities entitled to vote generally in the election of directors; 
 (ii) during any period of two consecutive years, individuals who at the beginning of such period constitute the Board, and any new director (other than a director designated by a person who has entered into an
agreement with the Company to effect a transaction described in clause (i), (iii) or (iv) of this definition) whose election by the Board or nomination for election by the Company’s shareholders was approved by a vote of at least
two-thirds of the directors then still in office who either were directors at the beginning of the period or whose election or nomination for election was previously so approved, cease for any reason to constitute at least a majority thereof;

 (iii) the shareholders of the Company approve a merger or consolidation of the Company with any other company other than
(A) a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting 

  

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securities of the surviving entity) more than 80% of the combined voting power of the voting securities of the Company (or such surviving entity) outstanding
immediately after such merger or consolidation, or (B) a merger or consolidation effected to implement a recapitalization of the Company (or similar transaction) in which no “person” (as hereinabove defined) acquires more than 25% of
the combined voting power of the Company’s then outstanding securities; or 
 (iv) the shareholders of the Company adopt
a plan of complete liquidation of the Company or approve an agreement for the sale, exchange or disposition by the Company of “all or a significant portion of the Company’s assets,” which for this purpose shall mean a sale or other
disposition transaction or series of related transactions involving assets of the Company or any Subsidiary (as defined below) (including the stock of any Subsidiary) in which the value of the assets or stock being sold or otherwise disposed of (as
measured by the purchase price being paid therefor or by such other method as the Board determines is appropriate in a case where there is no readily ascertainable purchase price) constitutes more than 25% of the fair market value of the Company (as
hereinafter defined). For purposes of the preceding sentence, the “fair market value of the Company” shall be the aggregate market value of the outstanding shares of common stock of the Company (on a fully diluted basis) plus the aggregate
market value of the Company’s other outstanding equity securities. The aggregate market value of the shares of common 

  

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stock of the Company shall be determined by multiplying the number of shares of the Company’s common stock (on a fully diluted basis) outstanding on the
date of the execution and delivery of a definitive agreement with respect to the transaction or series of related transactions (the “Transaction Date”) by the Market Value Per Share immediately preceding the Transaction Date or by such
other method as the Board shall reasonably determine is appropriate. The aggregate market value of any other equity securities of the Company shall be determined in a manner similar to that prescribed in the immediately preceding sentence for
determining the aggregate market value of the shares of common stock of the Company or by such other method as the Board shall reasonably determine is appropriate. 
 (c) If the Executive’s employment with the Company is terminated other than for Cause prior to a date on which a Change in Control
occurs of if the Executive’s employment with the Company is affected prior to the date on which a Change in Control occurs in a way which if occurring after a Change in Control would constitute Good Reason (as defined in Section 4.4(b) of
this Severance Agreement), and it is reasonably demonstrated that such termination or effect (1) was at the request of a third party who had taken steps reasonably calculated to effect a Change in Control or (2) otherwise arose in
connection with or anticipation of a Change in Control, then both the Change in Control and the Effective Date shall be deemed to have occurred on the date immediately prior to such 

  

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termination of employment or effect upon the Executive’s employment and the Executive’s rights shall be as determined under Section 4.4 below
on such basis. 
  

	 	3.	Terms of Employment. 

  

	 	(a)	Position and Duties. 

 (i) During
the Protection Period, (A) the Executive’s position (including status, offices, titles and reporting requirements), authority, duties and responsibilities shall be at least commensurate in all material respects with the most significant of
those held, exercised and assigned at any time during the 90-day period immediately preceding the Effective Date and (B) the Executive’s services shall be performed at the location where the Executive was employed immediately preceding the
Effective Date, or any office or location less than thirty-five (35) miles from such location. 
 (ii) During the Protection
Period, and excluding any periods of vacation and sick leave to which the Executive is entitled, the Executive agrees to devote reasonable attention and time during normal business hours to the business and affairs of the Company and, to the extent
necessary to discharge the responsibilities assigned to the Executive hereunder, to use the Executive’s reasonable best efforts to perform faithfully and efficiently such responsibilities. During the Protection Period it shall not be a
violation of this Agreement for the Executive to (A) serve on corporate, civic or charitable boards or committees, (B) deliver lectures, fulfill 

  

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speaking engagements or teach at educational institutions and (C) manage personal investments, so long as such activities do not significantly interfere
with the performance of the Executive’s responsibilities as an executive of the Company in accordance with this Agreement. It is expressly understood and agreed that to the extent that any such activities have been conducted by the Executive
prior to the Effective Date, the continued conduct of such activities (or the conduct of activities similar in nature and scope thereto), subsequent to the Effective Date shall not thereafter be deemed to interfere with the performance of the
Executive’s responsibilities to the Company. 
  

	 	(b)	Compensation. 

 (i) Base
Salary. During the Protection Period the Executive shall receive a base salary (“Base Salary”) at a monthly rate at least equal to the highest monthly base salary paid or payable to the Executive by the Company during the thirty-six
month period immediately preceding the month in which the Effective Date occurs. During the Protection Period, the Base Salary shall be reviewed at least annually and shall be increased at any time and from time to time as shall be substantially
consistent with increases in base salary awarded in the ordinary course of business to other key executives of the Company and its subsidiaries. Any increase in Base Salary shall not serve to limit or reduce any other obligation to the Executive
under this Agreement. Base Salary shall not be reduced after any such increase. 
  

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 (ii) Annual Bonus. In addition to Base Salary, the Executive shall be awarded, for
each fiscal year during the Protection Period, an annual bonus (an “Annual Bonus”) in cash at least equal to the highest bonus payable to the Executive from the Company and its subsidiaries in respect of the three fiscal years immediately
preceding the fiscal year in which the Effective Date occurs. 
 (iii) Incentive, Savings and Retirement Plans. In
addition to Base Salary and Annual Bonus payable as hereinafter provided, the Executive shall be entitled to participate during the Protection Period in all incentive, savings and retirement plans, practices, policies and programs applicable to
other key executives of the Company and its subsidiaries, in each case providing benefits which are the economic equivalent to those in effect or as subsequently amended. Such plans, practices, policies and programs, in the aggregate, shall provide
the Executive with compensation, benefits and reward opportunities at least as favorable as the most favorable of such compensation, benefits and reward opportunities provided by the Company for the Executive under such plans, practices, policies
and programs as in effect at any time during the 90-day period immediately preceding the Effective Date or, if more favorable to the Executive, as provided at any time thereafter with respect to other key executives of the Company and its
subsidiaries. 
  

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 (iv) Welfare Benefit Plans. During the Protection Period, the Executive and/or the
Executive’s family, as the case may be, shall be eligible for participation in and shall receive all benefits under welfare benefit plans, practices, policies and programs provided by the Company and its subsidiaries, at least as favorable as
the most favorable of such plans, practices, policies and programs in effect at any time during the 90-day period immediately preceding the Effective Date or, if more favorable to the Executive and/or the Executive’s family, as in effect at any
time thereafter with respect to other key executives of the Company and its subsidiaries. 
 (v) Expenses. During the
Protection Period, the Executive shall be entitled to receive prompt reimbursement for all reasonable expenses incurred by the Executive in accordance with the most favorable policies, practices and procedures of the Company and its subsidiaries in
effect at any time during the 90-day period immediately preceding the Effective Date or, if more favorable to the Executive, as in effect at any time thereafter with respect to other key executives of the Company and its subsidiaries. 
 (vi) Fringe Benefits. During the Protection Period, the Executive shall be entitled to fringe benefits, including use of an
automobile and payment of related expenses, in accordance with the most favorable plans, practices, programs and policies of the Company and its subsidiaries in effect at any time during the 90-day period immediately preceding the Effective 

  

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Date or, if more favorable to the Executive, as in effect at any time thereafter with respect to other key executives of the Company and its subsidiaries.

 (vii) Office and Support Staff. During the Protection Period, the Executive shall be entitled to an office or
offices of a size and with furnishing and other appointments, and to secretarial and other assistance, at least equal to the most favorable of the foregoing provided to the Executive by the Company and its subsidiaries at any time during the 90-day
period immediately preceding the Effective Date or, if more favorable to the Executive, as provided at any time thereafter with respect to other key executives of the Company and its subsidiaries. 
 (viii) Vacation. During the Protection Period, the Executive shall be entitled to paid vacation in accordance with the most
favorable plans, policies, programs and practices of the Company and its subsidiaries as in effect at any time during the 90-day period immediately preceding the Effective Date or, if more favorable to the Executive, as in effect at any time
thereafter with respect to other key executives of the Company and its subsidiaries. 
  

	 	4.	Termination of Employment. 

 The
Executive’s employment is subject to termination during the Protection Period only as provided in this Section 4. 
  

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	 	4.1	Death or Disability. 

 If the
Executive’s employment is terminated due to his death or total disability, as determined under the Company’s applicable long-term disability plan, this Agreement shall terminate without further obligations to the Executive or in the case
of the Executive’s death to the Executive’s legal representatives under this Agreement, other than those obligations accrued or earned and vested (if applicable) by the Executive as of the date of termination of employment (the
“Termination Date”), including, for this purpose (i) the Executive’s full Base Salary through the Termination Date at the rate in effect on the Termination Date or, if higher, at the highest rate in effect at any time from the
90-day period preceding the Effective Date through the Termination Date (the “Highest Base Salary”), (ii) the product of (A) the Annual Bonus, if any, paid to the Executive for the last full fiscal year and (B) a fraction,
the numerator of which is the number of days in the current fiscal year through the Termination Date, and the denominator of which is 365, and (iii) any compensation previously deferred by the Executive (together with any accrued interest
thereon) , and not yet paid by the Company and any accrued vacation pay not yet paid by the Company (such amounts specified in clauses (i) , (ii) and (iii) are hereinafter referred to as “Accrued Obligations”). All such
Accrued Obligations shall be paid to the Executive or in the event of the Executive’s death to the Executive’s estate or beneficiary, as applicable, in a 

  

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lump sum in cash within thirty (30) days of the Termination Date. Anything in this Agreement to the contrary notwithstanding, the Executive, or the
Executive’s family as appropriate, shall be entitled to receive benefits at least equal to the most favorable benefits provided by the Company and any of its subsidiaries under all plans, programs, practices and policies relating to disability
or family death benefits, as applicable, if any, in accordance with the most favorable plans, programs, practices and policies of the Company and its subsidiaries in effect at any time during the 90-day period immediately preceding the Effective
Date or, if more favorable to the Executive and/or the Executive’s family, as in effect on the date of the Executive’s disability or death with respect to other key executives of the Company and its subsidiaries and their families.

  

	 	4.2	Termination by the Company for Cause. 

 If the Company terminates the Executive’s employment for Cause, as defined below, the Executive shall be entitled only to Highest Base Salary and benefits accrued as of the effective date of such termination plus the amount of any
compensation previously deferred by the Executive (together with accrued interest thereon). Any other benefits shall be determined under applicable plans, programs or other coverages maintained by the Company. For purposes of this Severance
Agreement, the term “Cause” shall mean: 
 (i) an act or acts of personal dishonesty taken by the Executive and
intended to result in 

  

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substantial personal enrichment of the Executive at the expense of the Company; 
 (ii) repeated violations by the Executive of the Executive’s obligations under Section 3 of this Agreement which are demonstrably
willful and deliberate on the Executive’s part and which are not remedied in a reasonable period of time after receipt of written notice from the Company; or 
 (iii) the conviction of the Executive of, or plea of nolo contendere by the Executive to, a felony. 
 The Executive must be notified in writing of any termination of his employment for Cause, which writing shall set forth in reasonable
detail the facts and circumstances relied upon therefor. The Executive will then have the right, within ten days of receipt of such notice, to file a written request for review. In such case, the Executive will be given the opportunity to be heard,
personally or by counsel, by the members of the Board who are not then executives of the Company (the “Independent Directors”) and a majority of the Independent Directors must thereafter confirm that such termination is for Cause. If the
Independent Directors do not provide such confirmation, the termination shall be treated as a termination by the Company without Cause. 
  

	 	4.3	Termination by the Executive. 

 The
Executive may terminate his employment at any time in which case, except as otherwise provided in Sections 

  

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4.4 and 4.5 below, the Executive shall be entitled only to his salary and benefits accrued or earned and vested (if applicable) as of the date of
termination, including for this purpose, all Accrued Obligations. 
  

	 	4.4	Termination of the Executive for Good Reason; Termination by the Company without Cause. 

 (a) In General. In the event the Executive’s employment is terminated during the Protection Period (i) by the Executive for
Good Reason (as defined below), or (ii) by the Company without Cause, then: 
 (i) the Company shall pay to the
Executive in a lump sum in cash within 3 0 days after the Termination Date the aggregate of the following amounts: 
 A. to
the extent not theretofore paid, the Executive’s Highest Base Salary through the Termination Date; 
 B. the product of
(x) the Annual Bonus paid to the Executive for the last full fiscal year (if any) ending during the Protection Period or, if higher, the Annual Bonus paid to the Executive for the last full fiscal year prior to the Effective Date (as
applicable, the “Recent Bonus”) and (y) a fraction, the numerator of which is the number of days in the current fiscal year through the Termination Date and the denominator of which is 365; 
 C. the product of (x) 3.00 and (y) the sum of (i) the Highest Base Salary and (ii) the Recent Bonus; and 

D. in the case of compensation previously deferred by the Executive, all amounts previously deferred 

  

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(together with any accrued interest thereon) and not yet paid by the Company, and any accrued vacation pay not yet paid by the Company; 
 (ii) the Executive shall be entitled to receive a lump sum retirement benefit equal to the difference between (a) the actuarial
equivalent of the benefit the Executive would receive under all retirement plans if he remained employed by the Company at the compensation level provided for in Section 3 of this Agreement for the remainder of the Protection Period and
(b) the actuarial equivalent of his benefit, if any, actually accrued under the Company’s plans; and 
 (iii) for
the remainder of the Protection Period, or such longer period as any plan, program, practice or policy may provide, the Company shall continue benefits to the Executive and/or the Executive’s family at least equal to those which would have been
provided to them in accordance with the plans, programs, practices and policies as described in Section 3 of this Agreement if the Executive’s employment had not been terminated, including health insurance and life insurance, in accordance
with the most favorable plans, practices, programs or policies of the Company and its subsidiaries during the 90-day period immediately preceding the Effective Date, or, if more favorable to the Executive, as in effect at any time thereafter with
respect to other key executives of the Company and its subsidiaries and their families and for purposes of eligibility for retiree benefits pursuant to such plans, practices, programs 

  

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and policies, the Executive shall be considered to have remained employed until the end of the Protection Period, to have retired on the last day of such
period and to have satisfied all conditions for eligibility for all such retiree benefits. 
 (b) Good Reason. For
purposes of this Severance Agreement, Good Reason means any one of the following shall have occurred and not been corrected within ten days following written notice to the Company: 
 (i) the Executive reports to someone other than (A) an Independent Board, as defined below, (B) the board of directors of the
“Parent”, as defined below or (C) the chief executive officer of the Parent; 
 (ii) the assignment to the
Executive of any duties inconsistent in any respect with the Executive’s position (including status, offices, titles and reporting requirements), authority, duties or responsibilities as contemplated by Section 3 of this Agreement, or any
other action by the Company or any affiliate which results in a diminution in such position, authority, duties or responsibilities, excluding for this purpose an isolated, insubstantial and inadvertent action not taken in bad faith and which is
remedied by the Company promptly after receipt of notice thereof given by the Executive; 
 (iii) any failure by the company
to comply with any of the provisions of Section 3 of this Agreement, other than an isolated, insubstantial and inadvertent failure not 

  

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occurring in bad faith which is remedied by the Company promptly after receipt of notice thereof given by the Executive; 
 (iv) the Company’s requiring the Executive to be based at any office or location other than that described in Section 3 hereof,
except for travel reasonably required in the performance of the Executive’s responsibilities; 
 (v) any purported
termination by the Company of the Executive’s employment otherwise than as expressly permitted by this Agreement; or 
 (vi) any failure by the Company to comply with and satisfy Section 10(c) of this Agreement. 
 The term
“Parent” means any corporation which has acquired, directly or indirectly, 25% or more of the combined voting power of the Company’s outstanding securities, and the term “Independent Board” means a board of directors of the
Company a majority of which are individuals who are neither affiliates of the Parent nor employees of the Parent or its affiliates. For purposes of this Section 4.4(b), any good faith determination of “Good Reason” made by the
Executive shall be final and binding upon the Parties. 
  

	 	4.5	Termination by the Executive Following the First Anniversary of the Protection Period. 

 (a) General. 
 In the event that the Executive remains in the employ of the Company on the first day of the month coinciding with or next following the first anniversary of the Effective Date (the “Anniversary Date”), then the Executive may

  

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elect the provisions of this Section 4.5 by delivering a notice of termination within the period commencing on the Anniversary Date and ending thirty
days after the Anniversary Date (the “Window Period”), resigning as a director if applicable, and officer, and terminating his employment. If the Company receives such notice of termination from the Executive within the Window Period, then
the Executive shall be entitled to the same compensation, benefits and other remuneration as described in Section 4.4 applicable to a termination by the Company without Cause. 
  

	 	5.	Confidential Information. 

 The
Executive shall not, at any time, except in good faith in the performance of his duties for the Company, divulge any trade secrets or other proprietary or confidential information concerning the accounts, business or affairs of the Company, which
shall have been obtained by the Executive during the Executive’s employment by the Company and which shall not be or become public knowledge other than by acts of the Executive in violation of this Agreement (except such information as is
required by law or legal process to be divulged, in which case he shall give the Company prompt notice of such required disclosure and use his reasonable best efforts, in cooperation with the Company, to defend against any such required disclosure).
However, in no event shall an asserted violation of the provisions of this Section 5 constitute a basis for deferring or 

  

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withholding any amounts otherwise payable to the Executive under this Agreement. 
  

	 	6.	Indemnification 

 6.1 If at any time
the Executive is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that he is or was a director, officer,
employee or agent of the Company, or is or was serving at the request of the Company as a director, officer, employee or agent of another corporation, partnership, joint venture, trust, employee benefit plan or other enterprise, the Company shall
indemnify the Executive and hold him harmless against reasonable expenses (including attorneys’ fees), judgments, fines, penalties, amounts paid in settlement and other liabilities actually and reasonably incurred by him in connection with such
action, suit or proceeding to the full extent permitted by law. 
 6.2 Expenses (including attorneys’ fees) incurred by
the Executive in appearing at, participating in, or defending any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, shall be paid by the Company at reasonable intervals in advance
of the final disposition of such action, suit or proceeding upon receipt of an undertaking by the Executive to repay such amounts if it shall ultimately be determined that he is not entitled to be indemnified. 
  

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 6.3 All claims for indemnification under this Agreement shall be asserted and resolved as
follows: 
  

	 	(i)	The Executive (a) shall promptly notify the Company of any third-party claim or claims asserted against him (“Third Party Claim”) that could give rise to a right of
indemnification under this Agreement and (ii) shall transmit to the Company a written notice (“Claim Notice”) describing in reasonable detail the nature of the Third Party Claim, a copy of all papers served with respect to such claim
(if any), and the basis of his request for indemnification under this Agreement, 

  

	 	(ii)	 Within 30 days after receipt of any Claim Notice (“Election Period”), the Company shall notify the Executive (a) whether the Company disputes its
potential liability to the Executive under this Section 6 with respect to such Third Party Claim and (b) whether the Company desires, at its sole cost and expense, to defend the Executive against such Third Party Claim by any appropriate
proceedings, which 

  

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proceedings shall be prosecuted diligently by the Company to a final conclusion or settled at the discretion of the Company in accordance with this
Subsection 6.3(ii). The Company shall have full control of such defense and proceedings, including any compromise or settlement thereof. The Executive is hereby authorized, at the Company’s sole cost and expense (but only if he is actually
entitled to indemnification hereunder or if the Company assumes the defense with respect to the Third Party Claim), to file, during the Election Period, any motion, answer or other pleadings which he shall deem necessary or appropriate to protect
his interests or those of the Company and not prejudicial to the Company. If requested by the Company, the Executive agrees, at the Company’s sole cost and expense, to cooperate with the Company and its counsel in contesting any Third Party
Claim that the Company elects to contest, including without limitation, through the making of any related 

  

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counterclaim against the person asserting the Third Party Claim or any cross-complaint against any person. The Executive may participate in, but not control,
any defense or settlement of any Third Party Claim controlled by the Company pursuant to this Section 6.3 and the Company shall bear his costs and expenses with respect to such participation. 

  

	 	(iii)	 If the Company fails to notify the Executive within the Election Period that the Company elects to defend the Executive pursuant to Subsection 6.3(ii), or if the
Company elects to defend the Executive pursuant to Subsection 6.3(ii) but fails to diligently and promptly prosecute or settle the Third Party Claim, then the Executive shall have the right to defend, at the sole cost and expense of the Company, the
Third Party Claim. The Executive shall have full control of such defense and proceedings; provided, however, that the Executive may not enter into, without the Company’s 

  

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consent, which shall not be unreasonably withheld, any compromise or settlement of such Third Party Claim. Notwithstanding the foregoing, if the Company has
delivered a written notice to the Executive to the effect that the Company disputes its potential liability to the Executive under this Section 6, and if such dispute is resolved in favor of the Company by final, nonappealable order of a court
of competent jurisdiction, the Company shall not be required to bear the costs and expenses of the Executive’s defense pursuant to this Section 6 or of the Company’s participation therein at the Executive’s request, and the
Executive shall reimburse the Company promptly in full for all costs and expenses of such litigation. The Company may participate in, but not control, any defense or settlement controlled by the Executive pursuant to this Section 6.3 (iii), and
the Company shall bear its own costs and expenses with respect to such participation. 

  

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	 	(iv)	The indemnification provided by this Section 6 shall apply whether or not the negligence of a party is alleged or proved. 

  

	 	7.	Non-exclusivity of Rights. 

 Nothing
in this Agreement shall prevent or limit the Executive’s continuing or future participation in any benefit, bonus, incentive or other plans, programs, policies or practices, provided by the Company or any of its subsidiaries and for which the
Executive may qualify, nor shall anything herein limit or otherwise affect such rights as the Executive may have under any stock option or other agreements with the Company or any of its subsidiaries. Amounts which are vested benefits or which the
Executive is otherwise entitled to receive under any plan, policy, practice or program of the Company or any of its subsidiaries at or subsequent to the Termination Date shall be payable in accordance with such plan, policy, practice or program.

  

	 	8.	Full Settlement. 

 The
Company’s obligation to make the payments provided for in this Agreement and otherwise to perform its obligations hereunder shall not be affected by any set-off, counterclaim, recoupment, defense or other claim, right or action which the
Company may have against the Executive or others. In no event shall the Executive be obligated to seek other employment or take any other action by way of mitigation of the 

  

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amounts payable to the Executive under any of the provisions of this Agreement. The Company agrees to pay, to the full extent permitted by law, all legal
fees and expenses which the Executive may reasonably incur as a result of any contest (regardless of the outcome thereof) by the Company or others of the validity or enforceability of, or liability under, any provision of this Agreement or any
guarantee of performance thereof, plus in each case interest at the applicable Federal rate provided for in Section 7872(f)(2) of the Code. 
  

	 	9.	Certain Additional Payments by the Company. 

 (a) Anything in this Agreement to the contrary notwithstanding, in the event it shall be determined that any payment or distribution by the Company to or for the benefit of the Executive, whether paid or payable or distributed or
distributable pursuant to the terms of this Agreement or otherwise (a “Payment”), would be subject to the excise tax imposed by Section 4999 of the Internal Revenue Code of 1986, as amended (the “Code”) or any interest or
penalties with respect to such excise tax (such excise tax, together with any such interest and penalties, are hereinafter collectively referred to as the “Excise Tax”), then the Executive shall be entitled to receive an additional payment
(a “Gross-Up Payment”) in an amount such that after payment by the Executive of all taxes (including any interest or penalties imposed with respect to such taxes), including any Excise Tax, imposed upon the Gross-Up Payment, the 

  

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Executive retains an amount of the Gross-Up Payment equal to the Excise Tax imposed upon the Payments. 
 (b) Subject to the provisions of Section 9(c), all determinations required to be made under this Section 9, including whether a
Gross-Up Payment is required and the amount of such Gross-Up Payment, shall be made by Arthur Andersen & Co. (the “Accounting Firm”) which shall provide detailed supporting calculations both to the Company and the Executive within
15 business days of the Termination Date, if applicable, or such earlier time as is requested by the Company. The initial Gross-Up Payment, if any, as determined pursuant to this Section 9(b), shall be paid to the Executive within five
(5) days of the receipt of the Accounting Firm’s determination. If the Accounting Firm determines that no Excise Tax is payable to the Executive, it shall furnish the Executive with an opinion that he has substantial authority not to
report any Excise Tax on his federal income tax return. Any determination by the Accounting Firm shall be binding upon the Company and the Executive. As a result of the uncertainty in the application of Section 4999 of the Code at the time of
the initial determination by the Accounting Firm hereunder, it is possible that Gross-Up Payments which will not have been made by the Company should have been made (“Underpayment”), consistent with the calculations required to be made
hereunder. In the event that the Company exhausts its remedies pursuant to Section 9(c) and the Executive thereafter is required to make a payment of any Excise Tax, the Accounting Firm 

  

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shall determine the amount of the Underpayment that has occurred and any such Underpayment shall be promptly paid by the Company to or for the benefit of the
Executive. 
 (c) The Executive shall notify the Company in writing of any claim by the Internal Revenue Service that, if
successful, would require the payment by the Company of the Gross-Up Payment. Such notification shall be given as soon as practicable but no later than ten business days after the Executive knows of such claim and shall apprise the Company of the
nature of such claim and the date on which such claim is requested to be paid. The Executive shall not pay such claim prior to the expiration of the thirty-day period following the date on which the Executive gives such notice to the Company (or
shorter such period ending on the date that any payment of taxes with respect to such claim is due). If the Company notifies the Executive in writing prior to the expiration of such period that it desires to contest such claim, the Executive shall:

 (i) give the Company any information reasonably requested by the Company relating to such claim; 
 (ii) take such action in connection with contesting such claim as the Company shall reasonably request in writing from time to time,
including, without limitation, accepting legal representation with respect to such claim by an attorney reasonably selected by the Company; 
 (iii) cooperate with the Company in good faith in order effectively to contest such claim; 
  

 27 

 (iv) permit the Company to participate in any proceedings relating to such claim;

 provided, however, that the Company shall bear and pay directly all costs and expenses (including attorneys fees and any additional interest and
penalties) incurred in connection with such contest and shall indemnify and hold the Executive harmless, on an after-tax basis, for any Excise Tax or income tax, including interest and penalties with respect thereto, imposed as a result of such
representation and payment of costs and expenses. Without limitation on the foregoing provisions of this Section 9(c), the Company shall control all proceedings taken in connection with such contest and, at its sole option, may pursue or forego
any and all administrative appeals, proceedings, hearings and conferences with the taxing authority in respect of such claim and may, at its sole option, either direct the Executive to pay the tax claimed and sue for a refund or contest the claim in
any permissible manner, and the Executive agrees to prosecute such contest to a determination before any administrative tribunal, in a court of initial jurisdiction and in one or more appellate courts, as the Company shall determine; provided,
however, that if the Company directs the Executive to pay such claim and sue for a refund, the Company shall advance the amount of such payment to the Executive, on an interest-free basis and shall indemnify and hold the Executive harmless, on an
after-tax basis, from any Excise Tax or income tax, including interest or penalties with respect thereto, imposed with respect 

  

 28 

 
to such advance or with respect to any imputed income with respect to such advance; and further provided that any extension of the statute of limitations
relating to payment of taxes for the taxable year of the Executive with respect to which such contested amount is claimed to be due is limited solely to such contested amount. Furthermore, the Company’s control of the contest shall be limited
to issues with respect to which a Gross-Up Payment would be payable hereunder and the Executive shall be entitled to settle or contest, as the case may be, any other issue raised by the Internal Revenue Service or any other authority. 
 (d) If, after the receipt by the Executive of an amount advanced by the Company pursuant to Section 9(c), the Executive becomes
entitled to receive any refund with respect to such claim, the Executive shall (subject to the Company’s complying with the requirements of Section 9(c)) promptly pay to the Company the amount of such refund (together with any interest
paid or credited thereon after taxes applicable thereto). If, after the receipt by the Executive of an amount advanced by the Company pursuant to Section 9(c), a determination is made that the Executive shall not be entitled to any refund with
respect to such claims and the Company does not notify the Executive in writing of its intent to contest such denial of refund prior to the expiration of thirty days after such determination, then such advance shall be forgiven and shall not be
required to be repaid 

  

 29 

 
and the amount of such advance shall offset, to the extent thereof, the amount of Gross-Up Payment required to be paid. 
  

	 	10.	Successors. 

 (a) This Agreement is
personal to the Executive and without the prior written consent of the Company shall not be assignable by the Executive otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable
by the Executive’s legal representatives. 
 (b) This Agreement shall inure to the benefit of and be binding upon the
Company and its successors and assigns. 
 (c) The Company will require any successor (whether direct or indirect, by
purchase, merger, consolidation, or otherwise) to all or substantially all of the business and/or assets of the Company to assume expressly and agree to perform this Agreement in the same manner and to the same extent that the Company would be
required to perform it if no such succession had taken place. As used in this Agreement, “Company” shall mean the Company as hereinbefore defined and any successor to its business and/or assets as aforesaid which assumes and agrees to
perform this Agreement by operation of law, or otherwise. 
  

	 	11.	Withholding. 

 Anything to the
contrary notwithstanding, all payments required to be made by the Company hereunder to the Executive, his spouse, his estate or beneficiaries, shall be subject to withholding of such amounts relating to taxes as the 

  

 30 

 
Company may reasonably determine it should withhold pursuant to any applicable law or regulation. In lieu of withholding such amounts in whole or in part,
the Company may, in its sole discretion, accept other provisions for payment of taxes as required by law, provided it is satisfied that all requirements of law affecting its responsibilities to withhold such taxes have been satisfied. 
  

	 	12.	Effect of Severance Agreement. 

 This Severance Agreement contains the entire agreement between the Parties concerning the rights and obligations of the Executive upon a Change in Control and supersedes all prior agreements, understandings, discussions, negotiations, and
undertakings, whether written or oral, between the Parties with respect thereto. Except with respect to the rights and obligations of the Parties as described in Section 16 of the Employment Agreement, this Severance Agreement shall supersede
the provisions of the Employment Agreement upon commencement of the Protection Period under Section 2 above. 
  

	 	13.	Amendments and Waivers. 

 This
Severance Agreement may not be modified or amended except by a writing signed by both Parties. A Party may waive compliance by the other Party with any term or provision of this Severance Agreement, or any part thereof, provided that the term or
provision, or part thereof, is for the benefit of the waiving Party. Any waiver shall be limited to the facts or circumstances giving rise to the noncompliance and shall not be 

  

 31 

 
deemed either a general waiver or modification with respect to the term or provision, or part thereof, being waived, or as to any other term or provision of
this Severance Agreement, nor shall it be deemed a waiver of compliance with respect to any other facts or circumstances then or thereafter occurring. 
  

	 	14.	Mediation and Legal Actions. 

 If a
dispute arises out of or related to this Agreement or its breach and if the dispute cannot be settled through direct discussions, then the Company and the Executive agree first to endeavor to settle the dispute in an amicable manner by mediation,
under the applicable provisions of Sec. 154.001 et seq. Texas Civil Practices & Remedies Code, as supplemented by the mediation rules of the American Arbitration Association, before having recourse to any other proceeding or forum. If any
party to this Agreement brings legal action to enforce the terms of this Agreement against another party to this Agreement and prevails in such legal action, the other party, in addition to the remedy or relief obtained in such legal action, shall
be liable for the expenses incurred by the successful party in such legal action including costs of court and the fees and expenses of counsel. 
  

	 	15.	Notices. 

 Any notice given
hereunder shall be in writing and shall be deemed given when delivered personally or by courier, or five days after being mailed, certified or registered mail, duly 

  

 32 

 
addressed to the Party concerned at the address indicated below or at. such other address as such Party may subsequently provide: 
  

			
	To the Company:	  	 Lufkin Industries, Inc.
 601 South Raguet

Lufkin, Texas 75901
 Attn: Secretary

		
	With a copy to:	  	 Michael Rosenwasser, Esq.
 Andrews & Kurth
L.L.P.
 747 Third Avenue
 New York, NY 10017

		
	To the Executive:	  	 Douglas V. Smith
 2210 Copeland Street
 Lufkin, Texas 75901

  

	 	16.	Severability. 

 In the event that
any provision or portion of this Severance Agreement shall be determined to be invalid or unenforceable for any reason, the remaining provisions or portions of this Severance Agreement shall be unaffected thereby and shall remain in full force and
effect to the fullest extent permitted by law. 
  

	 	17.	Survivorship. 

 The respective
rights and obligations of the Parties hereunder shall survive any termination of this Severance Agreement to the extent necessary to the intended preservation of such rights and obligations. 
  

	 	18.	References. 

 References in this
Severance Agreement to the Executive shall be deemed to refer to his legal representative or, where appropriate, to his beneficiary or beneficiaries in the 

  

 33 

 
event of the Executive’s death or a judicial determination of his incompetence. 
  

	 	19.	Governing Law. 

 This Severance
Agreement shall be governed by and construed and interpreted in accordance with the laws of the State of Texas without reference to the principles of conflicts of law. 
  

	 	20.	Headings. 

 The headings of
paragraphs contained in this Severance Agreement are for convenience only and shall not be deemed to control or affect the meaning or construction of any provision of this Agreement. 
  

	 	21.	Counterparts. 

 This Severance
Agreement may be executed in one or more counterparts. 
 IN WITNESS WHEREOF, the undersigned have executed this Agreement on the date first
written above. 
  

			
	 LUFKIN INDUSTRIES, INC.

		
	 By:
	 	

	
	

	 Douglas V. Smith

  

 34Nektar Therapeutics' Restricted Stock Unit Notices and Agreement

 Exhibit 10.19 
 NEKTAR THERAPEUTICS 
 2000 EQUITY
INCENTIVE PLAN 
 RESTRICTED STOCK UNIT GRANT
NOTICE 
 Nektar Therapeutics (the “Company”), pursuant to its 2000 Equity Incentive Plan (the
“Plan”), hereby awards to Participant the number of Restricted Stock Units set forth below (“Award”). This Award is subject to all of the terms and conditions as set forth herein and in the Restricted
Stock Unit Agreement and the Plan, both of which are attached hereto and incorporated herein in their entirety. 
  

			
	Participant:	 	______________________________________________
		
	Date of Grant:	 	______________________________________________
		
	Number of Restricted Stock Units:	 	______________________________________________

  

			
	Vesting Schedule:	  	Subject to the limitations contained herein, the Restricted Stock Units subject to this Award shall vest as follows: (i) ___% of the Restricted Stock Units shall vest on the achievement of
[corporate objective], (ii) ___% of the Restricted Stock Units shall vest on the achievement of [corporate objective], (iii) ___% of the Restricted Stock Units shall vest on the achievement of [corporate objective], and (iv) ___% of
the Restricted Stock Units shall vest on the achievement of [corporate objective].

 Additional Terms/Acknowledgements: The undersigned Participant acknowledges receipt of, and understands and
agrees to, this Restricted Stock Unit Grant Notice, the Restricted Stock Unit Agreement and the Plan. Participant further acknowledges that as of the Date of Grant, this Restricted Stock Unit Grant Notice, the Restricted Stock Unit Agreement and the
Plan set forth the entire understanding between Participant and the Company regarding the acquisition of Restricted Stock Units of the Company and supersede all prior oral and written agreements on that subject with the exception of (i) Awards
previously granted and delivered to Participant under the Plan, and (ii) the following agreements only: 
  

			
	 OTHER AGREEMENTS:
	  	______________________________________________
		
		  	______________________________________________

  

									
	NEKTAR THERAPEUTICS	 		 	PARTICIPANT:
					
	By: 	 	  	 		 		 	  
		 	Signature	 		 		 	Signature
					
	Name: 	 	  	 		 	 Name: 
	 	  
		 	Print	 		 		 	Print
					
	Title: 	 	  	 		 	Date: 	 	  
					
	Date: 	 	  	 		 		 	

  

			
	ATTACHMENTS:	  	Restricted Stock Unit Agreement
		  	2000 Equity Incentive Plan

  

 1. 

 ATTACHMENT I 
 RESTRICTED STOCK UNIT AGREEMENT 

 ATTACHMENT II 
 2000 EQUITY INCENTIVE PLAN 

 NEKTAR THERAPEUTICS 
 2000 EQUITY INCENTIVE PLAN 
 RESTRICTED STOCK UNIT GRANT NOTICE 
 Nektar Therapeutics (the “Company”), pursuant to its 2000 Equity Incentive Plan (the “Plan”), hereby awards to Participant the number of Restricted Stock Units set forth
below (“Award”). This Award is subject to all of the terms and conditions as set forth herein and in the Restricted Stock Unit Agreement and the Plan, both of which are attached hereto and incorporated herein in their
entirety. 
  

			
	Participant:	 	______________________________________________
		
	Date of Grant:	 	______________________________________________
		
	Number of Restricted Stock Units:	 	______________________________________________

  

			
	Vesting Schedule:	  	Subject to the limitations contained herein, the Restricted Stock Units subject to this Award shall vest as follows: (i) ___% of the Restricted Stock Units shall vest on [date],
(ii) ___% of the Restricted Stock Units shall vest on [date], (iii) ___% of the Restricted Stock Units shall vest on [date], and (iv) 30 % of the Restricted Stock Units shall vest on [date].

 Additional Terms/Acknowledgements: The undersigned Participant acknowledges receipt of, and understands and
agrees to, this Restricted Stock Unit Grant Notice, the Restricted Stock Unit Agreement and the Plan. Participant further acknowledges that as of the Date of Grant, this Restricted Stock Unit Grant Notice, the Restricted Stock Unit Agreement and the
Plan set forth the entire understanding between Participant and the Company regarding the acquisition of Restricted Stock Units of the Company and supersede all prior oral and written agreements on that subject with the exception of (i) Awards
previously granted and delivered to Participant under the Plan, and (ii) the following agreements only: 
  

			
	 OTHER AGREEMENTS:
	  	______________________________________________
		
		  	______________________________________________

  

									
	NEKTAR THERAPEUTICS	 		 	PARTICIPANT:
					
	By: 	 	  	 		 		 	  
		 	Signature	 		 		 	Signature
					
	Name: 	 	  	 		 	 Name: 
	 	  
		 	Print	 		 		 	Print
					
	Title: 	 	  	 		 	Date: 	 	  
					
	Date: 	 	  	 		 		 	

  

			
	ATTACHMENTS:	  	Restricted Stock Unit Agreement
		  	2000 Equity Incentive Plan

  

 1. 

 ATTACHMENT I 
 RESTRICTED STOCK UNIT AGREEMENT 

 ATTACHMENT II 
 2000 EQUITY INCENTIVE PLAN 

 NEKTAR THERAPEUTICS 
 2000 EQUITY INCENTIVE PLAN 
 RESTRICTED STOCK UNIT AGREEMENT 
 Pursuant to your Restricted Stock Unit Grant Notice (“Grant Notice”) and this Restricted Stock Unit Agreement (“Agreement”) (collectively, the
“Award”), Nektar Therapeutics (the “Company”) has awarded you, pursuant to its 2000 Equity Incentive Plan (the “Plan”), the number of Restricted Stock Units as indicated in the
Grant Notice. Defined terms not explicitly defined in this Agreement but defined in the Plan shall have the same definitions as in the Plan. 
 The details of your Award are as follows. 
 1. VESTING. Subject to the limitations contained herein, your
Award shall vest as provided in the Grant Notice, provided that vesting shall cease upon the termination of your Continuous Service. Any Restricted Stock Units that have not vested shall be forfeited upon the termination of your Continuous Service.

 2. DIVIDENDS. You shall not receive any payment or other adjustment in the number of your Restricted Stock
Units for dividends or other distributions that may be made in respect of the shares of Common Stock to which your Restricted Stock Units relate. 
 3. DISTRIBUTION OF SHARES OF COMMON STOCK. The Company will deliver to you a number of shares of Common Stock equal to the number of vested
shares of Common Stock subject to your Award on the vesting date or dates provided in your Grant Notice; provided, however, that the shares of Common Stock subject to your Award that vest on or prior to the execution of your Grant Notice
shall be delivered as soon as practicable following the date of execution of your Grant Notice; and provided further, however, that in the event that the Company determines that you are subject to its policy regarding insider trading of the
Company’s stock and any shares of Common Stock subject to your Award are scheduled to be delivered on a day (the “Original Distribution Date”) that does not occur during a “window period” applicable to you, as
determined by the Company in accordance with such policy, then such shares shall not be delivered on such Original Distribution Date and shall instead be delivered as soon as practicable within the next “window period” applicable to you
pursuant to such policy. 
 4. NUMBER OF SHARES. The number of Restricted Stock Units
subject to your Award may be adjusted from time to time for capitalization adjustments, as provided in Section 11(a) of the Plan. 
 5. SECURITIES LAW COMPLIANCE. You may not be issued any shares of Common Stock under your Award unless the shares of Common Stock are either (i) then registered under the Securities
Act or (ii) the Company has determined that such issuance would be exempt from the registration requirements of the Securities Act. Your Award must also comply with other applicable laws and regulations governing the Award, and you shall not
receive such shares if the Company determines that such receipt would not be in material compliance with such laws and regulations. 
  

 1. 

 6. EXECUTION OF DOCUMENTS. You hereby acknowledge and
agree that the manner selected by the Company by which you indicate your consent to your Grant Notice is also deemed to be your execution of your Grant Notice and of this Agreement. You further agree that such manner of indicating consent may be
relied upon as your signature for establishing your execution of any documents to be executed in the future in connection with your Award. This Agreement shall be deemed to be signed by the Company and you upon the respective signing by the Company
and you of the Grant Notice to which it is attached. 
 7. RESTRICTIVE LEGENDS. The shares of Common
Stock issued under your Award shall be endorsed with appropriate legends, if any, determined by the Company. 
 8.
TRANSFERABILITY. Your Award is not transferable, except by will or by the laws of descent and distribution. Notwithstanding the foregoing, by delivering written notice to the Company, in a form satisfactory to the Company, you may
designate a third party who, in the event of your death, shall thereafter be entitled to receive any distribution of shares of Common Stock pursuant to Section 3 of this Agreement. 
 9. AWARD NOT A SERVICE CONTRACT. Your Award is not an employment or
service contract, and nothing in your Award shall be deemed to create in any way whatsoever any obligation on your part to continue in the service of the Company or an Affiliate, or on the part of the Company or an Affiliate to continue such
service. In addition, nothing in your Award shall obligate the Company or an Affiliate, their respective stockholders, boards of directors, Officers or Employees to continue any relationship that you might have as an Employee, Director or Consultant
for the Company or an Affiliate. 
 10. UNSECURED OBLIGATION. Your Award is unfunded, and as a holder of
vested Restricted Stock Units subject to your Award, you shall be considered an unsecured creditor of the Company with respect to the Company’s obligation, if any, to issue shares of Common Stock pursuant to Section 3 of this Agreement.

 11. WITHHOLDING OBLIGATIONS. You shall be required to deposit with the Company an amount of cash
equal to the amount determined by the Company to be required with respect to any federal, state, local or foreign withholding obligations of the Company in connection with the Award or conversion of Restricted Stock Units into shares of Common
Stock. Alternatively, the Company, in its sole discretion, may withhold the required amounts from your pay during the pay periods immediately preceding and/or next following the date on which any such applicable tax liability arises or may permit
you, subject to such conditions as the Company may require, to elect to have the Company withhold a number of shares of Common Stock otherwise deliverable having a Fair Market Value sufficient to satisfy such withholding obligations. The Company
shall not deliver any shares of Common Stock unless you have made provision for withholding that is satisfactory to the Company, in its sole discretion. 
  

 2. 

 12. NOTICES. Any notices provided for in your Award or the Plan shall be given in
writing and shall be deemed effectively given upon receipt or, in the case of notices delivered by the Company to you, five (5) days after deposit in the United States mail, postage prepaid, addressed to you at the last address you provided to
the Company. 
 13. HEADINGS. The headings of the Sections in this Agreement are inserted for convenience only and
shall not be deemed to constitute a part of this Agreement or to affect the meaning of this Agreement. 
 14.
SEVERABILITY. If all or any part of this Agreement or the Plan is declared by any court or governmental authority to be unlawful or invalid, such unlawfulness or invalidity will not invalidate any portion of this Agreement or the
Plan not declared to be unlawful or invalid. Any Section of this Agreement (or part of such a Section) so declared to be unlawful or invalid will, if possible, be construed in a manner which will give effect to the terms of such Section or part of a
Section to the fullest extent possible while remaining lawful and valid. 
 15. AMENDMENT. Nothing in this Agreement
shall restrict the Company’s ability to exercise its discretionary authority pursuant to Section 3 of the Plan; provided, however, that no such action may, without your consent, adversely affect your rights under your Award and this
Agreement. 
 16. MISCELLANEOUS. 
 (a) The rights and obligations of the Company under your Award shall be transferable to any one or more persons or entities, and
all covenants and agreements hereunder shall inure to the benefit of, and be enforceable by the Company’s successors and assigns. 
 (b) You agree upon request to execute any further documents or instruments necessary or desirable in the sole determination of the Company to carry out the purposes or intent of your Award. 
 (c) You acknowledge and agree that you have reviewed your Award in its entirety, have had an opportunity to obtain the advice of
counsel prior to executing and accepting your Award and fully understand all provisions of your Award. 
 17. GOVERNING
PLAN DOCUMENT. Your Award is subject to all the provisions of the Plan, the provisions of which are hereby made a part of your Award, and is further subject to all interpretations, amendments, rules and regulations
which may from time to time be promulgated and adopted pursuant to the Plan. In the event of any conflict between the provisions of your Award and those of the Plan, the provisions of the Plan shall control. 
 18. CHOICE OF LAW. The interpretation, performance and enforcement of this Agreement shall be
governed by the law of the state of California without regard to such state’s conflicts of laws rules. 
  

 3.

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