Jean I. Liu - 14 Nov 2022 Form 4 Insider Report for Seagen Inc.

Role: Chief Legal Officer
Signature: By: /s/ Jennifer Prosba For: Jean I. Liu
Issuer symbol: N/A
Transactions as of: 14 Nov 2022
Net transactions value: +$99,995
Form type: 4
Filing time: 16 Nov 2022, 17:22:29 UTC
Previous filing: 01 Sep 2022
Next filing: 18 Nov 2022
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SGEN	Common Stock	Options Exercise	$99,995	+1,301	+1.5%	$76.86	85,691	14 Nov 2022	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SGEN	Incentive Stock Option (right to buy)	Options Exercise	$0	-1,301	-100%	$0.000000^*	0	14 Nov 2022	Common Stock	1,301	$76.86	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Amount of securities beneficially owned following reported transactions includes restricted stock units subject to vesting.
F2	Options vested at a rate of 25% on 8/30/19 and monthly thereafter until all the options were fully vested on 8/30/22.