Exhibit 10.1

SEATTLE GENETICS, INC.

Senior Executive Annual Bonus Plan

This Senior Executive Annual Bonus Plan (the “Plan”) is intended to enhance
stockholder value by promoting a connection between the performance of Seattle
Genetics, Inc. (the “Company”) and the compensation of senior executives of the
Company and to promote retention of participating senior executives.

1. Executives of the Company at the Vice President level and above
(“Participants”) are eligible to receive annual bonuses for each calendar year
(each, a “Plan Year”) according to this Plan. The Plan will be administered by
the Compensation Committee of the Board of Directors of the Company (the
“Committee”). The Committee shall have all powers and discretion necessary to
administer the Plan including any adjustments, amendments and modifications to
the Plan or its application to all or any participants and to control its
operation and may delegate responsibilities to Company officers as it deems
appropriate. Participants are eligible to receive bonuses for each Plan Year
based on their individual performance and the Company’s performance during such
Plan Year. A Participant who does not demonstrate satisfactory individual
performance (50% or higher) during any Plan Year, however, will not be eligible
for any portion of his or her bonus for such Plan Year, including the portion
based on Company performance.

2. For each Plan Year, Company performance shall be determined by the Committee
based on the Company’s ability to meet or exceed Company goals for such Plan
Year, as set forth by the Board of Directors of the Company, which may include
such factors as: sales or commercial goals; research, development and clinical
activities, milestones and go/no go decisions; hiring, retention, development of
plans and other operational goals; strategic alliances and acquisitions;
acquisitions and licensing or partnering transactions; international expansion
goals, government affairs and public policy goals; manufacturing and supply
goals; quality goals; regulatory goals; expense and cost reduction goals; debt
reduction; improvement in or attainment of working capital levels; financings;
implementation or completion of projects or processes; and financial metrics,
including stock price performance, profitability, cash flow or net income. For
clarification, the Committee may determine in its sole discretion that the
Company did not satisfactorily complete enough goals for the applicable Plan
Year and in that case, the Committee may determine that no bonus shall be paid
to Participants for such Plan Year. For each Plan Year, individual performance
of the Participants who are senior executives on the Executive Committee and, if
applicable, any other employee who is an “officer” within the meaning of Rule
16a-1(f) under the Exchange Act (each, an “Executive Officer”), shall be
determined by the Committee upon review and recommendation to the Committee by
the Head of Human Resources and the Chief Executive Officer, except for the
individual performance of the Chief Executive Officer, which shall be determined
by the Committee. For each Plan Year, individual performance of Participants who
are not Executive Officers (“Other Officers”) will be reviewed and determined by
the CEO. In all cases, awards shall be based on the individual Participant’s
satisfactory completion of individual performance goals established for the
applicable Plan Year (if and to the extent applicable) and/or the individual
Participant’s contribution to the Company’s success in achieving the Company
goals for such Plan Year.

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3. To be eligible for a bonus for any Plan Year, a Participant must be on the
Company’s payroll prior to November 1 of such Plan Year and must be employed by
the Company as of the date of payment of the bonus. A Participant hired after
commencement of any Plan Year shall be eligible for a pro-rated bonus for such
Plan Year. A Participant who, during any Plan Year, is promoted into a position
with a higher bonus target will have a pro-rated bonus based on his or her time
in each position during such Plan Year and the applicable individual performance
targets for such positions for such Plan Year, but calculated based on the
Participant’s annual base pay as of the last day of such Plan Year.

4. A Participant who has taken an approved leave of absence pursuant to the
Company’s policies of longer than 90 calendar days during any Plan Year shall
receive a pro-rated bonus for such Plan Year, calculated by excluding the number
of days that exceed 90 calendar days during such Plan Year that he or she was on
an approved leave of absence. For example, a person on an approved leave of
absence for 100 days is eligible for a pro-rated bonus by subtracting 10 days
from the bonus calculation.

5. A Participant who is on an approved leave of absence on the date the bonus
payment for any Plan Year is made will be eligible to receive a bonus for such
Plan Year on the bonus payment date, provided that such bonus will be pro-rated
as calculated above if he or she was on an approved leave of absence for longer
than 90 calendar days during such Plan Year.

6. The amount of a Participant’s bonus for each Plan Year is based on a target
percentage of such Participant’s annual base pay as of the last day of such Plan
Year. This target percentage shall be determined by the Committee in the case of
Executive Officers or the CEO in the case of a Participant who is an Other
Officer at the beginning of each Plan Year. The target percentage for such Plan
Year shall then be adjusted based on the Company’s performance and the
individual Participant’s performance over the course of such Plan Year to arrive
at a final performance percentage for such Plan Year. For all Participants who
are Other Officers, the final performance percentage for each Plan Year shall be
based 50% on the Company’s performance and 50% on each Participant’s individual
performance. For those Participants that are Executive Officers, other than the
Chief Executive Officer and the Chief Operating Officer, the final performance
percentage for each Plan Year shall be based 60% on the Company’s performance
and 40% on each Participant’s performance. The Chief Operating Officer’s final
performance percentage for each Plan Year shall be based 80% on the Company’s
performance and 20% on the Participant’s performance and the Chief Executive
Officer’s final performance percentage for each Plan Year shall be determined by
the Committee in its sole discretion. For any Plan Year, the Company performance
percentage and/or the individual performance percentage may exceed 100% in the
event the Company or the individual Participant exceeds expected goals, provided
that neither percentage may exceed 150%. For example, for an applicable Plan
Year, assuming the Company has met 100% of its goals, a Participant who is an
Other Officer, who has met 150% of his or her individuals goals, has a target
percentage of 25% and has a base pay rate of $100,000 will receive a bonus of
$31,250 for such Plan Year (100% x 0.5 + 150% x 0.5 = 125%; and 125% x 25% =
31.25%; and 31.25% of Participant’s base pay rate of $100,000 = $31,250). A
Participant’s bonus for any Plan Year may be paid in cash or stock or a
combination of both at the discretion of the Committee. All determinations and
decisions made by the Committee or the CEO as applicable shall be final,
conclusive and binding on all persons and shall be given the maximum deference
permitted by law.

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7. This Plan is effective as of January 1, 2017. Bonus payments for each Plan
Year will be made by February 15th following the end of such Plan Year.

8. The Company shall provide a copy of this Plan to each Participant and
communicate to each Participant his or her target percentage for each Plan Year
as determined by the Committee at the beginning of such Plan Year.

9. This Plan supersedes all prior bonus plans or any written or verbal
representations regarding the subject matter of this Plan and is the entire
understanding between the Company and the Participant regarding the subject
matter of this Plan. Participation in this Plan for any Plan Year will not
convey any entitlement to participate in this Plan for any future Plan Year or
in any future plans or to the same or similar future bonus payments. The
Committee may at any time amend, suspend, or terminate this Plan, including
amendment of the target percentages for each Participant and amendment so as to
ensure that no amount paid or to be paid hereunder shall be subject to the
provisions of Section 409(a)(1)(B) of the Internal Revenue Code of 1986, as
amended (the “Code”). For the avoidance of doubt, it is intended that the Plan
satisfy the exemption from the application of Section 409A of the Code and the
Treasury Regulations and other guidance issued thereunder and any state law of
similar effect provided under Section 1.409A-1(b)(4) of the Treasury
Regulations, and the Plan shall be administered and interpreted to the greatest
extent possible in compliance therewith.

10. The Company shall withhold all applicable taxes from any bonus payment,
including any federal, state and local taxes.

11. Nothing in this Plan shall interfere with or limit in any way the right of
the Company to terminate any Participant’s employment or service at any time,
with or without cause. Nothing in these guidelines should be construed as an
employment agreement or an entitlement to any Participant for any incentive
payment hereunder.

12. This Plan and all awards shall be construed in accordance with and governed
by the laws of the State of Washington, without regard to its conflict of law
provisions.

13. Payments under this Plan shall be unsecured, unfunded obligations of the
Company. To the extent a Participant has any rights under this Plan, the
Participant’s rights shall be those of a general unsecured creditor of the
Company.