Document:

Amended and Restated Employment Agreement, Todd E. Simpson

 Exhibit 10.49 
 AMENDED & RESTATED EXECUTIVE EMPLOYMENT AGREEMENT 
 THIS AMENDED &
RESTATED EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made and entered into as of the 15th day of December, 2008, by and between SEATTLE GENETICS, INC., a Delaware corporation (“Company”) and Todd Simpson
(“Executive”). 
 RECITALS: 
 WHEREAS, Executive and Company are parties to the Executive Employment Agreement dated October 17, 2005 (the “Prior Agreement”) and wish to amend and restate the Prior Agreement to clarify
certain existing provisions in light of final regulations issued under Section 409A of the Internal Revenue Code of 1986, as amended (the “Code”). 
 NOW, THEREFORE, in consideration of the mutual covenants and agreements contained in this Agreement, the sufficiency of which is hereby acknowledged, the parties agree as follows: 
  

	I.	DUTIES 

 1.1 Title and Responsibilities.
Executive shall serve as Chief Financial Officer (“CFO”) of the Company, which title may be changed at any time in the sole discretion of the Company. Executive’s responsibilities and duties shall include those inherent in
Executive’s position with the Company and shall further include such other managerial responsibilities and executive duties consistent with such position as may be assigned to Executive from time to time by the Chief Executive Officer of the
Company. Executive shall devote his best efforts and full business time to the business and interests of the Company. During the term of Executive’s employment with the Company, Executive may serve on the board of directors of up to two
(2) other companies, manage personal investments, and engage in civic and charitable activities, provided that such activities shall not represent a conflict of interest with the Company and do not materially detract from fulfilling
Executive’s responsibilities and duties to the Company. 
  

	II.	COMPENSATION 

 2.1 Base Salary. Executive
shall be paid a base salary (“Base Salary”) by the Company during the term of Executive’s employment at the rate determined by the Compensation Committee of the Board of Directors (the “Compensation
Committee”), which is currently $306,200.00 per year. Executive’s Base Salary shall be reviewed annually by the Compensation Committee and evaluated based on performance and salary levels of other executives of comparable position
within the industry and geographic location of the Company. Based upon such evaluation and review, Executive’s Base Salary may be adjusted from time to time as determined by the Compensation Committee in its sole discretion. 
 2.2 Bonus. Executive may be eligible to receive an annual bonus (“Annual Bonus”), currently targeted at forty percent
(40%) of Executive’s Base Salary, based upon performance criteria and financial and operational results of the Company as determined by the Compensation 

 
Committee. To the extent that the Annual Bonus is earned and becomes payable in accordance with the terms under which it is offered and unless otherwise
specified in a written document reflecting the bonus arrangement, any Annual Bonus earned by Executive will be paid to Executive prior to two and one half (2 1/2) months following the year in which the Annual Bonus becomes payable as a result of Executive’s vesting in the right to the Annual Bonus. 
 2.3 Stock Options. Executive may be eligible to receive grants of stock options or purchase rights from time to time in the future, on such
terms and subject to such conditions as the Compensation Committee shall determine as of the date of any such grant and pursuant to the existing stock plan(s) of the Company. 
 2.4 Other Benefits. 
 (i) Executive shall be entitled to such employee benefits generally available to full-time salaried employees of the Company, including without limitation, health insurance, paid vacation of not less than four (4) weeks per year,
retirement plans and other similar benefits; provided, that Company reserves the right to amend, modify, terminate or make any other changes in such benefits generally available to full-time salaried employees of the Company at any time in its sole
discretion. 
 (ii) The Company shall pay or reimburse Executive for all travel and entertainment expenses incurred by
Executive in connection with Executive’s duties on behalf of the Company, subject to the reasonable approval of the Company. Executive shall only be entitled to reimbursement to the extent that Executive follows the reasonable procedures
established by the Company for reimbursement of such expenses which will include, but will not be limited to, providing satisfactory evidence of such expenditures. 
  

	III.	TERMINATION OF EMPLOYMENT 

 3.1 Termination of
Employment and Severance Benefits. 
 (a) Termination of Employment. This Agreement may be terminated
upon the occurrence of any of the following events: 
 (i) The Company’s determination in good faith that it is
terminating Executive for Cause (as defined in Section 3.3 below) (“Termination for Cause”); 
 (ii) The
Company’s determination that it is terminating Executive without Cause, which determination may be made by the Company at any time at the Company’s sole discretion, for any or no reason (“Termination Without Cause”);

 (iii) The effective date of a written notice sent to the Company from Executive stating that Executive is electing to
terminate his employment with the Company (“Voluntary Termination”); 
 (iv) A change in Executive’s
status such that a Constructive Termination (as defined in Section 3.2(d) below) has occurred; or 
  

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 (v) Following Executive’s death or Disability (as defined in Section 3.4
below). 
 3.2 Severance Benefits. Executive shall be entitled to receive severance benefits upon termination of
employment only as set forth in this Section 3.2 contingent upon resignation from all positions held by Executive and only if Executive executes a full release and waiver of claims within thirty (30) days of Executive’s termination
(and allows it to become effective in accordance with its terms): 
 (a) Voluntary Termination. If
Executive’s employment terminates by Voluntary Termination, then Executive shall not be entitled to receive payment of any severance benefits. Executive will receive payment(s) for all salary and unpaid vacation accrued as of the date of
Executive’s termination of employment and Executive’s benefits will be continued under the Company’s then existing benefit plans and policies in accordance with such plans and policies in effect on the date of termination and in
accordance with applicable law. 
 (b) Involuntary
Termination. If Executive’s employment is terminated under Section 3.1(a)(ii) (Termination Without Cause) or 3.1(a)(iv) (Constructive Termination) above (such termination, an “Involuntary Termination”),
Executive will be entitled to receive payment of severance benefits equal to Executive’s regular monthly salary for twelve (12) months (the “Severance Period”). Such payments shall be made, at the Company’s option, in
a lump sum within thirty (30) days after the date of Executive’s Involuntary Termination or periodically over the Severance Period according to the Company’s standard payroll schedule, provided that such payments may not extend beyond
two and one-half (2 1/2) months following the end of the calendar year in which the date of Involuntary Termination occurs.
Executive will also be entitled to receive payment on the date of Involuntary Termination of the pro rata portion of any Annual Bonus based on achievement of the specific corporate and individual performance targets established for the fiscal year
in which the termination occurs, payable prior to two and one-half (2 1/2) months following the end of the calendar year in which
the date of Involuntary Termination occurs. Executive will receive payment(s) for all salary and unpaid vacation accrued as of the date of Executive’s termination of employment and health insurance benefits will be continued through payment of
Executive’s COBRA health insurance premiums by the Company over the Severance Period so long as Executive timely elects to continue Executive’s health insurance coverage under COBRA and subject to COBRA’s terms, conditions and
requirements. 
 (c) Termination for Cause. If Executive’s employment is terminated for
Cause, then Executive shall not be entitled to receive payment of any severance benefits. Executive will receive payment(s) for all salary and unpaid vacation accrued as of the date of Executive’s termination of employment and Executive’s
benefits will be continued under the Company’s then existing benefit plans and policies in accordance with such plans and policies in effect on the date of termination and in accordance with applicable law. 
 (d) Constructive Termination. “Constructive Termination” shall be deemed to occur if (A) there is a
material reduction or change in job duties, responsibilities and requirements inconsistent with Executive’s position with the Company and prior duties, responsibilities and requirements, provided that neither a mere change in title alone nor

  

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reassignment to a position that is substantially similar to the position held prior to the change in terms of job duties, responsibilities or requirements
shall constitute a material reduction in job responsibilities; or (B) there is a reduction in Executive’s then-current base salary by at least twenty percent (20%), provided that an across-the-board reduction in the salary level of all
other senior executives by the same percentage amount as part of a general salary level reduction shall not constitute such a salary reduction; or (C) Executive refuses to relocate to a facility or location more than 50 miles from the
Company’s current location; provided, however, that in each case above, Executive must first provide notice of the existence of the circumstances giving rise to a Constructive Termination within ninety (90) days of the initial existence of
such circumstances and the Company must be provided with a period of thirty (30) days from the date of receipt of such notice to cure the circumstances giving rise to a Constructive Termination; provided further that the Company may notify
Executive at any time prior to expiration of the cure period that it will not cure the circumstances, in which case the cure period shall end immediately upon such notification. 
 (e) Termination by Reason of Death or Disability. In the event that
Executive’s employment with the Company terminates as a result of Executive’s death or Disability (as defined in Section 3.4 below), Executive or Executive’s estate or representative will receive all salary and unpaid
vacation accrued as of the date of Executive’s death or Disability and any other benefits payable under the Company’s then existing benefit plans and policies in accordance with such plans and policies in effect on the date of death or
Disability and in accordance with applicable law. In addition, Executive’s estate or representative will receive the amount of Executive’s Initial and Annual Bonus for the fiscal year in which the death or Disability occurs to the extent
that the Initial or Annual Bonus has been earned as of the date of Executive’s death or Disability, as determined by the Board of Directors or its Compensation Committee based on the specific corporate and individual performance targets
established for such fiscal year, which will be paid prior to two and one-half (2 1/2) months following the year of
Executive’s death or Disability (subject to Executive’s termination as a result of such Disability). 
 3.3 Definition of
Cause. For purposes of this Agreement, “Cause” for Executive’s termination will exist at any time after the happening of one or more of the following events: 
 (a) An action or omission of Executive which constitutes a willful and intentional material breach of this Agreement or the
Confidentiality Agreement (defined below), including without limitation, Executive’s theft or other misappropriation of the Company’s proprietary information; 
 (b) Executive’s commitment of fraud, embezzlement, misappropriation of funds or breach of trust in connection with Executive’s
employment; or 
 (c) Executive’s conviction of any crime which involves dishonesty or a breach of trust, or gross
negligence in connection with the performance of the Executive’s duties. 
 3.4. Definition of Disability. For
purposes of this Agreement “Disability” shall mean any medically determinable physical or mental impairment that can be expected to result in death 

  

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or that has lasted or can be expected to last for a continuous period of not less than twelve (12) months and renders Executive unable to perform the
duties of CFO. 
  

	IV.	STOCK ACCELERATION 

 4.1 Accelerated Vesting.
In addition to any other right of acceleration that may be provided pursuant to any stock option plan or agreement pursuant to which Executive has been granted options to purchase shares of Common Stock of the Company, if Executive’s employment
is terminated due to an Involuntary Termination, the vesting of any unvested stock options and the lapsing of the Company’s repurchase right with respect to any shares of restricted stock held by Executive as of the date of Executive’s
Involuntary Termination shall accelerate such that the options shall become vested and the repurchase right shall lapse as to an additional twelve (12) months; provided that if such Involuntary Termination occurs within twelve
(12) months after a Change of Control (as defined below), then the vesting of all stock options and the lapse of the Company’s repurchase right with respect to all shares of restricted stock of the Company held by Executive shall be
accelerated completely so that one hundred percent (100%) of the shares of common stock covered by the stock options are fully vested and exercisable and the Company’s repurchase right has lapsed with respect to all shares of restricted
stock held by Executive. 
 4.2 Definition of Change of Control. For purposes of this Agreement, “Change of Control”
shall mean the occurrence of any of the following events: (i) an acquisition of the Company by another entity by means of any transaction or series of related transactions (including, without limitation, any reorganization, merger or
consolidation but excluding any merger effected exclusively for the purpose of changing the domicile of the Company), or (ii) a sale of all or substantially all of the assets of the Company (collectively, a “Merger”), so long
as in either case the Company’s stockholders of record immediately prior to such Merger will, immediately after such Merger, hold less than 50% of the voting power of the surviving or acquiring entity. 
  

	V.	RESTRICTIVE COVENANTS 

 5.1 Confidentiality
Agreement. Executive shall sign, or has signed the Company’s form of Proprietary Information and Inventions Agreement (the “Confidentiality Agreement”) substantially in the form attached hereto as
Exhibit A. Executive hereby represents and warrants to the Company that he has complied with all obligations under the Confidentiality Agreement and agrees to continue to abide by the terms of the Confidentiality Agreement and further
agrees that the provisions of the Confidentiality Agreement shall survive any termination of this Agreement or of Executive’s employment relationship with the Company, including the noncompetition provisions of the Confidentiality Agreement.

  

	VI.	OTHER PROVISIONS 

 6.1 Limitation on Severance
Benefits. In the event that any severance benefits provided for in this Agreement to Executive (i) constitute “parachute payments” within the meaning of Section 280G of the Internal Revenue Code of 1986, as amended
(the “Code”) and (ii) but for 

  

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this Section 6.1, would be subject to the excise tax imposed by Section 4999 of the Code, then Executive’s severance benefits under
Section 3.2 shall be payable either: 
 (a) in full, or 
 (b) as to such lesser amount which would result in no portion of such benefits being subject to excise tax under Section 4999 of the
Code, whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes and the excise tax imposed by Section 4999, results in the receipt by Executive on an after-tax basis, of the greatest amount of
benefits under Section 3.2 notwithstanding that all or some portion of such benefits may be taxable under Section 4999 of the Code. Any determination required under this Section 6.1 shall be made in writing by independent public
accountants appointed by Executive and reasonably acceptable to the Company (the “Accountants”), whose determination shall be conclusive and binding upon Executive and the Company for all purposes. For purposes of making the
calculations required by this Section 6.1, the Accountants may make reasonable assumptions and approximations concerning applicable taxes and may rely on reasonable, good faith interpretations concerning the application of Sections 280G and
4999 of the Code. The Company and Executive shall furnish to the Accountants such information and documents as the Accountants may reasonably request in order to make a determination under this Section 6.1. The Company shall bear all costs the
Accountants may reasonably incur in connection with any calculations contemplated by this Section 6.1. If a reduced amount is to be paid under this Section 6.1, reductions in payments and/or benefits shall occur in the following order:
(1) reduction of cash payments, (2) cancellation of accelerated vesting of stock awards other than stock options, (3) cancellation of accelerated vesting of stock options and (4) reduction of other benefits (if any) paid to the
Executive. 
 6.2 Code Section 409A. This Agreement shall be interpreted
to avoid any penalty sanctions under Section 409A of the Code and the final regulations and any guidance promulgated thereunder (“Section 409A”). If any payment or benefit cannot be provided or made at the time specified herein
without incurring sanctions under Section 409A, then such benefit or payment shall be provided in full at the earliest time thereafter when such sanctions will not be imposed. All payments to be made upon a termination of employment under this
Agreement may be made only upon a “separation of service” under Section 409A. Notwithstanding anything to the contrary in this Agreement, if at the time of Executive’s termination of employment, Executive is a “specified
employee” within the meaning of Section 409A, and the deferral of the commencement of any severance payments or benefits otherwise payable pursuant to this Agreement as a result of such termination of employment is necessary in order to
prevent any accelerated income recognition or additional tax under Section 409A(a)(1), then the Company will not commence any payment of any such severance payments or benefits otherwise required hereunder (but without any reduction in such
payments or benefits ultimately paid or provided to Executive) that (a) will not and may not under any circumstances, regardless of when such termination occurs, be paid in full by March 15 of the year following Executive’s
termination (or two and one half (2 1/2) months after the close of the Company’s fiscal year, if later), and (b) are in
excess of the lesser of (i) two (2) times Executive’s then annual compensation or (ii) two (2) times the limit on compensation set forth in Section 401(a)(17) of the Code for the year in which Executive’s
employment is terminated and will not be paid by the 

  

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end of the second calendar year following the year in which the termination occurs, until the first payroll date that occurs after the date that is six
(6) months following Executive’s “separation of service” with the Company (as defined under Code Section 409A). If any payments are delayed due to such requirements, such amounts will be paid in a lump sum to Executive on
the earliest of (x) Executive’s death following the date of Executive’s termination of employment with the Company or (y) the first payroll date that occurs after the date that is six (6) months following Executive’s
“separation of service” with the Company. For these purposes, each severance payment or benefit is designated as a separate payment or benefit and will not collectively be treated as a single payment or benefit. This provision is intended
to comply with the requirements of Code Section 409A so that none of the severance payments and benefits to be provided hereunder will be subject to the additional tax imposed under Section 409A, and any ambiguities herein will be
interpreted to so comply. The Company and Executive agree to work together in good faith to consider amendments to this Agreement and to take such reasonable actions which are necessary, appropriate or desirable to avoid imposition of any additional
tax or income recognition prior to actual payment to Executive under Section 409A. Notwithstanding anything to the contrary set forth in this Agreement, to the extent that any amendment to this Agreement with respect to the payment of any
severance payments or benefits would constitute under Section 409A a delay or acceleration in a payment or a change in the form of payment, then such amendment must be done in a manner that complies with Section 409A(a)(4)(C). 

6.3 Indemnification. The Company hereby agrees to indemnify and hold the Executive harmless, to the fullest extent permitted by law and as set
forth in the Amended and Restated Certificate of Incorporation of the Company, from and against any expenses, including legal fees, and all judgments, fines and amounts paid in settlement and reasonably incurred in connection with legal,
administrative or investigative proceedings to which the Executive is made, or threatened to be made, a party by reason of the fact the Executive is or was a director or officer of the Company. 
 6.4 Entire Agreement. This Agreement, the Confidentiality Agreement and any agreement pertaining to Executive’s stock options or shares of
restricted stock contain the entire agreement and understanding of the parties with respect to Executive’s employment by the Company and compensation payable to Executive by the Company and supersede all prior understandings, agreements and
discussions including the Prior Agreement. This Agreement may only be amended or modified by a written instrument executed by Executive and the Chief Executive Officer of the Company pursuant to authorization by the Compensation Committee.

 6.5 Notices. Any and all notices permitted or required to be given under this Agreement must be in writing. Notices will be deemed
given (i) on the first business day after having been sent by commercial overnight courier with written verification of receipt, or (ii) on the third business day after having been sent by registered or certified mail from a location on
the United States mainland, return receipt requested, postage prepaid, whichever occurs first, at the address set forth below or at any new address, notice of which will have been given in accordance with this Section 6.5: 
  

					
	If to the Company:	  	Seattle Genetics, Inc.	  	
		  	21823 30th Drive SE	  	

  

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		  	Bothell, WA 98021	  	
		  	Attn: General Counsel	  	
			
	If to Executive:	  	Todd Simpson	  	

 6.6 Non-Waiver. Failure to enforce at any time any of the provisions of this Agreement
shall not be interpreted to be a waiver of such provisions or to affect either the validity of this Agreement or the right of either party thereafter to enforce each and every provision of this Agreement. 
 6.7 Separability. If one or more provisions of this Agreement is finally determined to be invalid or unenforceable, such provision will not affect
or impair the other provisions of this Agreement, all of which will continue to be in effect and will be enforceable, provided, however, that any such invalid provisions shall, to the extent possible, be reformed so as to implement insofar as
practicable the intentions of the parties. 
 6.8 Term. The employment of Executive under this Agreement shall be for an unspecified
term. The Company and Executive acknowledge and agree that Executive’s employment is and shall continue to be at-will, as defined under applicable law, and that Executive’s employment with the Company may be terminated by either party at
any time for any or no reason, and with or without notice. If Executive’s employment terminates for any reason, Executive shall not be entitled to any payments, benefits, damages award or compensation other than as provided in this Agreement.

 6.9 Law. This Agreement shall be interpreted in accordance with the laws of the State of Washington. 
 6.10 No Duty to Mitigate. Executive shall not be required to mitigate the amount of any payment contemplated by this
Agreement (whether by seeking new employment or in any other manner), nor, except as otherwise provided in this Agreement, shall any such payment be reduced by any earnings that Executive may receive from any other source. 
 6.11 Legal Fees. In the event either party breaches this Agreement, the nonbreaching party shall be entitled to recover from the breaching party
any and all damages, costs and expenses, including without limitation, attorneys’ fees and court costs, incurred by the nonbreaching party as a result of the breach. 
 6.12 Counterparts. This Agreement may be executed in counterparts which when taken together will constitute one instrument. Any copy of this Agreement with the original signatures of all parties appended
will constitute an original. 
  

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 IN WITNESS WHEREOF, the parties have executed this Agreement as of the day and year first above written.

  

			
	COMPANY:
	
	SEATTLE GENETICS, INC.
		
	By:	 	/s/ Clay B. Siegall
	Name:	 	Clay B. Siegall
	Title:	 	President & CEO

  

	
	EXECUTIVE
	
	/s/ Todd Simpson
	Todd Simpson

  

 -9-Amended and Restated Employment Agreement, Eric L. Dobmeier

 Exhibit 10.50 
 AMENDED & RESTATED EXECUTIVE EMPLOYMENT AGREEMENT 
 THIS AMENDED &
RESTATED EXECUTIVE EMPLOYMENT AGREEMENT (“Agreement”) is made and entered into as of the 15th day of December, 2008, by and between SEATTLE GENETICS, INC., a Delaware corporation (“Company”) and Eric Dobmeier
(“Executive”). 
 RECITALS: 
 WHEREAS, Executive and Company are parties to the Executive Employment Agreement dated September 6, 2006 (the “Prior Agreement”) and wish to amend and restate the Prior Agreement to
clarify certain existing provisions in light of final regulations issued under Section 409A of the Internal Revenue Code of 1986, as amended (the “Code”). 
 NOW, THEREFORE, in consideration of the mutual covenants and agreements contained in this Agreement, the sufficiency of which is hereby
acknowledged, the parties agree as follows: 
  

	I.	DUTIES 

 1.1 Title and Responsibilities.
Executive shall serve as Chief Business Officer, (“CBO”) of the Company, which title may be changed at any time in the sole discretion of the Company. Executive’s responsibilities and duties shall include those inherent in
Executive’s position with the Company and shall further include such other managerial responsibilities and executive duties consistent with such position as may be assigned to Executive from time to time by the Chief Executive Officer of the
Company. Executive shall devote his best efforts and full business time to the business and interests of the Company. During the term of Executive’s employment with the Company, Executive may serve on the board of directors of up to two
(2) other companies, manage personal investments, and engage in civic and charitable activities, provided that such activities shall not represent a conflict of interest with the Company and do not materially detract from fulfilling
Executive’s responsibilities and duties to the Company. 
  

	II.	COMPENSATION 

 2.1 Base Salary. Executive
shall be paid a base salary (“Base Salary”) by the Company during the term of Executive’s employment at the rate determined by the Compensation Committee of the Board of Directors (the “Compensation
Committee”), which is currently $354,550.00 per year. Executive’s Base Salary shall be reviewed annually by the Compensation Committee and evaluated based on performance and salary levels of other executives of comparable position
within the industry and geographic location of the Company. Based upon such evaluation and review, Executive’s Base Salary may be adjusted from time to time as determined by the Compensation Committee in its sole discretion. 
 2.2 Bonus. Executive may be eligible to receive an annual bonus (“Annual Bonus”), currently targeted at forty percent
(40%) of Executive’s Base Salary, based upon performance criteria and financial and operational results of the Company as determined by the Compensation 

 
Committee. To the extent that the Annual Bonus is earned and becomes payable in accordance with the terms under which it is offered and unless otherwise
specified in a written document reflecting the bonus arrangement, any Annual Bonus earned by Executive will be paid to Executive prior to two and one half (2 1/2) months following the year in which the Annual Bonus becomes payable as a result of Executive’s vesting in the right to the Annual Bonus. 
 2.3 Stock Options. Executive may be eligible to receive grants of stock options or purchase rights from time to time in the future, on such
terms and subject to such conditions as the Compensation Committee shall determine as of the date of any such grant and pursuant to the existing stock plan(s) of the Company. 
 2.4 Other Benefits. 
 (i) Executive shall be entitled to such employee benefits generally available to full-time salaried employees of the Company, including without limitation, health insurance, paid vacation of not less than four (4) weeks per year,
retirement plans and other similar benefits; provided, that Company reserves the right to amend, modify, terminate or make any other changes in such benefits generally available to full-time salaried employees of the Company at any time in its sole
discretion. 
 (ii) The Company shall pay or reimburse Executive for all travel and entertainment expenses incurred by
Executive in connection with Executive’s duties on behalf of the Company, subject to the reasonable approval of the Company. Executive shall only be entitled to reimbursement to the extent that Executive follows the reasonable procedures
established by the Company for reimbursement of such expenses which will include, but will not be limited to, providing satisfactory evidence of such expenditures. 
  

	III.	TERMINATION OF EMPLOYMENT 

 3.1 Termination of
Employment and Severance Benefits. 
 (a) Termination of Employment. This Agreement may
be terminated upon the occurrence of any of the following events: 
 (i) The Company’s determination in good faith that
it is terminating Executive for Cause (as defined in Section 3.3 below) (“Termination for Cause”); 
 (ii) The Company’s determination that it is terminating Executive without Cause, which determination may be made by the Company at any time at the Company’s sole discretion, for any or no reason (“Termination Without
Cause”); 
 (iii) The effective date of a written notice sent to the Company from Executive stating that Executive is
electing to terminate his employment with the Company (“Voluntary Termination”); 
 (iv) A change in
Executive’s status such that a Constructive Termination (as defined in Section 3.2(d) below) has occurred; or 
  

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 (v) Following Executive’s death or Disability (as defined in Section 3.4
below). 
 3.2 Severance Benefits. Executive shall be entitled to receive severance benefits upon termination of
employment only as set forth in this Section 3.2 contingent upon resignation from all positions held by Executive and only if Executive executes a full release and waiver of claims within thirty (30) days of Executive’s termination
(and allows it to become effective in accordance with its terms): 
 (a) Voluntary Termination. If
Executive’s employment terminates by Voluntary Termination, then Executive shall not be entitled to receive payment of any severance benefits. Executive will receive payment(s) for all salary and unpaid vacation accrued as of the date of
Executive’s termination of employment and Executive’s benefits will be continued under the Company’s then existing benefit plans and policies in accordance with such plans and policies in effect on the date of termination and in
accordance with applicable law. 
 (b) Involuntary
Termination. If Executive’s employment is terminated under Section 3.1(a)(ii) (Termination Without Cause) or 3.1(a)(iv) (Constructive Termination) above (such termination, an “Involuntary Termination”),
Executive will be entitled to receive payment of severance benefits equal to Executive’s regular monthly salary for twelve (12) months (the “Severance Period”). Such payments shall be made, at the Company’s option, in
a lump sum within thirty (30) days after the date of Executive’s Involuntary Termination or periodically over the Severance Period according to the Company’s standard payroll schedule, provided that such payments may not extend beyond
two and one-half (2 1/2) months following the end of the calendar year in which the date of Involuntary Termination occurs.
Executive will also be entitled to receive payment on the date of Involuntary Termination of the pro rata portion of any Annual Bonus based on achievement of the specific corporate and individual performance targets established for the fiscal year
in which the termination occurs, payable prior to two and one-half (2  1/2) months following the end of the calendar year in
which the date of Involuntary Termination occurs. Executive will receive payment(s) for all salary and unpaid vacation accrued as of the date of Executive’s termination of employment and health insurance benefits will be continued through
payment of Executive’s COBRA health insurance premiums by the Company over the Severance Period so long as Executive timely elects to continue Executive’s health insurance coverage under COBRA and subject to COBRA’s terms, conditions
and requirements. 
 (c) Termination for Cause. If Executive’s employment is terminated for
Cause, then Executive shall not be entitled to receive payment of any severance benefits. Executive will receive payment(s) for all salary and unpaid vacation accrued as of the date of Executive’s termination of employment and Executive’s
benefits will be continued under the Company’s then existing benefit plans and policies in accordance with such plans and policies in effect on the date of termination and in accordance with applicable law. 
 (d) Constructive Termination. “Constructive Termination” shall be deemed to occur if (A) there is a
material reduction or change in job duties, responsibilities and requirements inconsistent with Executive’s position with the Company and prior duties, responsibilities and requirements, provided that neither a mere change in title alone nor

  

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reassignment to a position that is substantially similar to the position held prior to the change in terms of job duties, responsibilities or requirements
shall constitute a material reduction in job responsibilities; or (B) there is a reduction in Executive’s then-current base salary by at least twenty percent (20%), provided that an across-the-board reduction in the salary level of all
other senior executives by the same percentage amount as part of a general salary level reduction shall not constitute such a salary reduction; or (C) Executive refuses to relocate to a facility or location more than 50 miles from the
Company’s current location; provided, however, that in each case above, Executive must first provide notice of the existence of the circumstances giving rise to a Constructive Termination within ninety (90) days of the initial existence of
such circumstances and the Company must be provided with a period of thirty (30) days from the date of receipt of such notice to cure the circumstances giving rise to a Constructive Termination; provided further that the Company may notify
Executive at any time prior to expiration of the cure period that it will not cure the circumstances, in which case the cure period shall end immediately upon such notification. 
 (e) Termination by Reason of Death or Disability. In the event that
Executive’s employment with the Company terminates as a result of Executive’s death or Disability (as defined in Section 3.4 below), Executive or Executive’s estate or representative will receive all salary and unpaid
vacation accrued as of the date of Executive’s death or Disability and any other benefits payable under the Company’s then existing benefit plans and policies in accordance with such plans and policies in effect on the date of death or
Disability and in accordance with applicable law. In addition, Executive’s estate or representative will receive the amount of Executive’s Annual Bonus for the fiscal year in which the death or Disability occurs to the extent that the
Annual Bonus has been earned as of the date of Executive’s death or Disability, as determined by the Board of Directors or its Compensation Committee based on the specific corporate and individual performance targets established for such fiscal
year, which will be paid prior to two and one-half (2 1/2) months following the year of Executive’s death or Disability
(subject to Executive’s termination as a result of such Disability). 
 3.3 Definition of Cause. For
purposes of this Agreement, “Cause” for Executive’s termination will exist at any time after the happening of one or more of the following events: 
 (a) An action or omission of Executive which constitutes a willful and intentional material breach of this Agreement or the
Confidentiality Agreement (defined below), including without limitation, Executive’s theft or other misappropriation of the Company’s proprietary information; 
 (b) Executive’s commitment of fraud, embezzlement, misappropriation of funds or breach of trust in connection with Executive’s
employment; or 
 (c) Executive’s conviction of any crime which involves dishonesty or a breach of trust, or gross
negligence in connection with the performance of the Executive’s duties. 
 3.4. Definition of Disability. For
purposes of this Agreement “Disability” shall mean any medically determinable physical or mental impairment that can be expected to result in death 

  

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or that has lasted or can be expected to last for a continuous period of not less than twelve (12) months and renders Executive unable to perform the
duties of CBO. 
  

	IV.	STOCK ACCELERATION 

 4.1 Accelerated Vesting.
In addition to any other right of acceleration that may be provided pursuant to any stock option plan or agreement pursuant to which Executive has been granted options to purchase shares of Common Stock of the Company, if Executive’s employment
is terminated due to an Involuntary Termination, the vesting of any unvested stock options and the lapsing of the Company’s repurchase right with respect to any shares of restricted stock held by Executive as of the date of Executive’s
Involuntary Termination shall accelerate such that the options shall become vested and the repurchase right shall lapse as to an additional twelve (12) months; provided that if such Involuntary Termination occurs within twelve
(12) months after a Change of Control (as defined below), then the vesting of all stock options and the lapse of the Company’s repurchase right with respect to all shares of restricted stock of the Company held by Executive shall be
accelerated completely so that one hundred percent (100%) of the shares of common stock covered by the stock options are fully vested and exercisable and the Company’s repurchase right has lapsed with respect to all shares of restricted
stock held by Executive. 
 4.2 Definition of Change of Control. For purposes of this Agreement, “Change of Control”
shall mean the occurrence of any of the following events: (i) an acquisition of the Company by another entity by means of any transaction or series of related transactions (including, without limitation, any reorganization, merger or
consolidation but excluding any merger effected exclusively for the purpose of changing the domicile of the Company), or (ii) a sale of all or substantially all of the assets of the Company (collectively, a “Merger”), so long
as in either case the Company’s stockholders of record immediately prior to such Merger will, immediately after such Merger, hold less than fifty percent (50%) of the voting power of the surviving or acquiring entity. 
  

	V.	RESTRICTIVE COVENANTS 

 5.1 Confidentiality
Agreement. Executive shall sign, or has signed the Company’s form of Proprietary Information and Inventions Agreement (the “Confidentiality Agreement”) substantially in the form attached hereto as
Exhibit A. Executive hereby represents and warrants to the Company that he has complied with all obligations under the Confidentiality Agreement and agrees to continue to abide by the terms of the Confidentiality Agreement and further
agrees that the provisions of the Confidentiality Agreement shall survive any termination of this Agreement or of Executive’s employment relationship with the Company, including the noncompetition provisions of the Confidentiality Agreement.

  

	VI.	OTHER PROVISIONS 

 6.1 Limitation on Severance
Benefits. In the event that any severance benefits provided for in this Agreement to Executive (i) constitute “parachute payments” within the meaning of Section 280G of the Internal Revenue Code of 1986, as
amended (the “Code”) and (ii) but for 

  

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this Section 6.1, would be subject to the excise tax imposed by Section 4999 of the Code, then Executive’s severance benefits under
Section 3.2 shall be payable either: 
 (a) in full, or 
 (b) as to such lesser amount which would result in no portion of such benefits being subject to excise tax under Section 4999 of the
Code, whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes and the excise tax imposed by Section 4999, results in the receipt by Executive on an after-tax basis, of the greatest amount of
benefits under Section 3.2 notwithstanding that all or some portion of such benefits may be taxable under Section 4999 of the Code. Any determination required under this Section 6.1 shall be made in writing by independent public
accountants appointed by Executive and reasonably acceptable to the Company (the “Accountants”), whose determination shall be conclusive and binding upon Executive and the Company for all purposes. For purposes of making the
calculations required by this Section 6.1, the Accountants may make reasonable assumptions and approximations concerning applicable taxes and may rely on reasonable, good faith interpretations concerning the application of Sections 280G and
4999 of the Code. The Company and Executive shall furnish to the Accountants such information and documents as the Accountants may reasonably request in order to make a determination under this Section 6.1. The Company shall bear all costs the
Accountants may reasonably incur in connection with any calculations contemplated by this Section 6.1. If a reduced amount is to be paid under this Section 6.1, reductions in payments and/or benefits shall occur in the following order:
(1) reduction of cash payments, (2) cancellation of accelerated vesting of stock awards other than stock options, (3) cancellation of accelerated vesting of stock options and (4) reduction of other benefits (if any) paid to the
Executive. 
 6.2 Code Section 409A. This Agreement shall be interpreted
to avoid any penalty sanctions under Section 409A of the Code and the final regulations and any guidance promulgated thereunder (“Section 409A”). If any payment or benefit cannot be provided or made at the time specified herein
without incurring sanctions under Section 409A, then such benefit or payment shall be provided in full at the earliest time thereafter when such sanctions will not be imposed. All payments to be made upon a termination of employment under this
Agreement may be made only upon a “separation of service” under Section 409A. Notwithstanding anything to the contrary in this Agreement, if at the time of Executive’s termination of employment, Executive is a “specified
employee” within the meaning of Section 409A, and the deferral of the commencement of any severance payments or benefits otherwise payable pursuant to this Agreement as a result of such termination of employment is necessary in order to
prevent any accelerated income recognition or additional tax under Section 409A(a)(1), then the Company will not commence any payment of any such severance payments or benefits otherwise required hereunder (but without any reduction in such
payments or benefits ultimately paid or provided to Executive) that (a) will not and may not under any circumstances, regardless of when such termination occurs, be paid in full by March 15 of the year following Executive’s
termination (or two and one half (2  1/2) months after the close of the Company’s fiscal year, if later), and (b) are
in excess of the lesser of (i) two (2) times Executive’s then annual compensation or (ii) two (2) times the limit on compensation set forth in Section 401(a)(17) of the Code for the year in which Executive’s
employment is terminated and will not be paid by the 

  

 -6- 

 
end of the second calendar year following the year in which the termination occurs, until the first payroll date that occurs after the date that is six
(6) months following Executive’s “separation of service” with the Company (as defined under Code Section 409A). If any payments are delayed due to such requirements, such amounts will be paid in a lump sum to Executive on
the earliest of (x) Executive’s death following the date of Executive’s termination of employment with the Company or (y) the first payroll date that occurs after the date that is six (6) months following Executive’s
“separation of service” with the Company. For these purposes, each severance payment or benefit is designated as a separate payment or benefit and will not collectively be treated as a single payment or benefit. This provision is intended
to comply with the requirements of Code Section 409A so that none of the severance payments and benefits to be provided hereunder will be subject to the additional tax imposed under Section 409A, and any ambiguities herein will be
interpreted to so comply. The Company and Executive agree to work together in good faith to consider amendments to this Agreement and to take such reasonable actions which are necessary, appropriate or desirable to avoid imposition of any additional
tax or income recognition prior to actual payment to Executive under Section 409A. Notwithstanding anything to the contrary set forth in this Agreement, to the extent that any amendment to this Agreement with respect to the payment of any
severance payments or benefits would constitute under Section 409A a delay or acceleration in a payment or a change in the form of payment, then such amendment must be done in a manner that complies with Section 409A(a)(4)(C). 

6.3 Indemnification. The Company hereby agrees to indemnify and hold the Executive harmless, to the fullest extent permitted by law and as set
forth in the Amended and Restated Certificate of Incorporation of the Company, from and against any expenses, including legal fees, and all judgments, fines and amounts paid in settlement and reasonably incurred in connection with legal,
administrative or investigative proceedings to which the Executive is made, or threatened to be made, a party by reason of the fact the Executive is or was a director or officer of the Company. 
 6.4 Entire Agreement. This Agreement, the Confidentiality Agreement and any agreement pertaining to Executive’s stock options or shares of
restricted stock contain the entire agreement and understanding of the parties with respect to Executive’s employment by the Company and compensation payable to Executive by the Company and supersede all prior understandings, agreements and
discussions, including the Prior Agreement. This Agreement may only be amended or modified by a written instrument executed by Executive and the Chief Executive Officer of the Company pursuant to authorization by the Compensation Committee.

 6.5 Notices. Any and all notices permitted or required to be given under this Agreement must be in writing. Notices will be deemed
given (i) on the first business day after having been sent by commercial overnight courier with written verification of receipt, or (ii) on the third business day after having been sent by registered or certified mail from a location on
the United States mainland, return receipt requested, postage prepaid, whichever occurs first, at the address set forth below or at any new address, notice of which will have been given in accordance with this Section 6.5: 
  

			
	If to the Company:	  	Seattle Genetics, Inc.
		  	21823 30th Drive SE

  

 -7- 

			
		  	Bothell, WA 98021
		  	Attn: General Counsel
		
	If to Executive:	  	Eric Dobmeier

  
 6.6 Non-Waiver. Failure
to enforce at any time any of the provisions of this Agreement shall not be interpreted to be a waiver of such provisions or to affect either the validity of this Agreement or the right of either party thereafter to enforce each and every provision
of this Agreement. 
 6.7 Separability. If one or more provisions of this Agreement is finally determined to be invalid or
unenforceable, such provision will not affect or impair the other provisions of this Agreement, all of which will continue to be in effect and will be enforceable, provided, however, that any such invalid provisions shall, to the extent possible, be
reformed so as to implement insofar as practicable the intentions of the parties. 
 6.8 Term. The employment of Executive under this
Agreement shall be for an unspecified term. The Company and Executive acknowledge and agree that Executive’s employment is and shall continue to be at-will, as defined under applicable law, and that Executive’s employment with the Company
may be terminated by either party at any time for any or no reason, and with or without notice. If Executive’s employment terminates for any reason, Executive shall not be entitled to any payments, benefits, damages award or compensation other
than as provided in this Agreement. 
 6.9 Law. This Agreement shall be interpreted in accordance with the laws of the State of
Washington. 
 6.10 No Duty to Mitigate. Executive shall not be required to mitigate the amount of any payment
contemplated by this Agreement (whether by seeking new employment or in any other manner), nor, except as otherwise provided in this Agreement, shall any such payment be reduced by any earnings that Executive may receive from any other source.

 6.11 Legal Fees. In the event either party breaches this Agreement, the nonbreaching party shall be entitled to recover from the
breaching party any and all damages, costs and expenses, including without limitation, attorneys’ fees and court costs, incurred by the nonbreaching party as a result of the breach. 
 6.12 Counterparts. This Agreement may be executed in counterparts which when taken together will constitute one instrument. Any copy of
this Agreement with the original signatures of all parties appended will constitute an original. 
  

 -8- 

 IN WITNESS WHEREOF, the parties have executed this Agreement as of the day and year first above written.

  

			
	COMPANY:
	
	SEATTLE GENETICS, INC.
		
	By:	 	/s/ Clay B. Siegall
	Name:	 	Clay B. Siegall
	Title:	 	President & CEO
	
	EXECUTIVE
	
	/s/ Eric Dobmeier
	Eric Dobmeier

  

 -9-

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