SEC FORM 4

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

SIEGALL CLAY B

(Last)

(First)

(Middle)

21823 30TH DRIVE SE

(Street)

BOTHELL

98021

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
Seagen Inc. [ SGEN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
12/03/2020

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	12/03/2020		M		100	A	$15.46	715,309⁽¹⁾	D
Common Stock	12/03/2020		S⁽²⁾		100	D	$180.91	715,209⁽¹⁾	D
Common Stock	12/03/2020		M		10,936	A	$15.46	726,145⁽¹⁾	D
Common Stock	12/03/2020		S⁽²⁾		10,936	D	$180.14⁽³⁾	715,209⁽¹⁾	D
Common Stock	12/03/2020		M		4,844	A	$15.46	720,053⁽¹⁾	D
Common Stock	12/03/2020		S⁽²⁾		4,844	D	$179.14⁽⁴⁾	715,209⁽¹⁾	D
Common Stock	12/03/2020		M		3,253	A	$15.46	718,462⁽¹⁾	D
Common Stock	12/03/2020		S⁽²⁾		3,253	D	$178.16⁽⁵⁾	715,209⁽¹⁾	D
Common Stock	12/03/2020		M		1,120	A	$15.46	716,329⁽¹⁾	D
Common Stock	12/03/2020		S⁽²⁾		1,120	D	$177.28⁽⁶⁾	715,209⁽¹⁾	D
Common Stock	12/03/2020		M		1,000	A	$15.46	716,209⁽¹⁾	D
Common Stock	12/03/2020		S⁽²⁾		1,000	D	$176.18⁽⁷⁾	715,209⁽¹⁾	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Non-Qualified Stock Option (right to buy)	$15.46	12/03/2020		M			100	⁽⁸⁾	08/24/2021	Common Stock	100	$0.0	293,432	D
Non-Qualified Stock Option (right to buy)	$15.46	12/03/2020		M			10,936	⁽⁸⁾	08/24/2021	Common Stock	10,936	$0.0	282,496	D
Non-Qualified Stock Option (right to buy)	$15.46	12/03/2020		M			4,844	⁽⁸⁾	08/24/2021	Common Stock	4,844	$0.0	277,652	D
Non-Qualified Stock Option (right to buy)	$15.46	12/03/2020		M			3,253	⁽⁸⁾	08/24/2021	Common Stock	3,253	$0.0	274,399	D
Non-Qualified Stock Option (right to buy)	$15.46	12/03/2020		M			1,120	⁽⁸⁾	08/24/2021	Common Stock	1,120	$0.0	273,279	D
Non-Qualified Stock Option (right to buy)	$15.46	12/03/2020		M			1,000	⁽⁸⁾	08/24/2021	Common Stock	1,000	$0.0	272,279	D

Explanation of Responses:

1. Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting.

2. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan.

3. Reflects sales of common stock executed in multiple transactions at prices ranging from $179.77 to $180.72. The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected.

4. Reflects sales of common stock executed in multiple transactions at prices ranging from $178.73 to $179.64. The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected.

5. Reflects sales of common stock executed in multiple transactions at prices ranging from $177.73 to $178.70. The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected.

6. Reflects sales of common stock executed in multiple transactions at prices ranging from $176.72 to $177.61. The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected.

7. Reflects sales of common stock executed in multiple transactions at prices ranging from $175.59 to $176.54 The price reported reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request by the Securities and Exchange Commission staff, the Issuer or a security holder of the Issuer full information regarding the number of shares and prices at which the sales were effected.

8. Options vested at a rate of 25% on 8/24/12 and monthly thereafter until all the shares were fully vested on 8/24/15.

	By: /s/ Jean Liu For: Clay B. Siegall	12/04/2020
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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