James Paul Rickey - Nov 30, 2023 Form 4 Insider Report for ALPINE IMMUNE SCIENCES, INC. (ALPN)

Role: Senior Vice President, Chief Financial Officer and Corporate Secretary
Signature: /s/ James Paul Rickey
Stock symbol: ALPN
Transactions as of: Nov 30, 2023
Transactions value $: -$8,939
Form type: 4
Date filed: 12/1/2023, 05:00 PM
Previous filing: Nov 8, 2023
Next filing: Dec 6, 2023

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALPN	Common Stock	Options Exercise	$2.26K	+700		$3.23	700	Nov 30, 2023	Direct	F1
transaction	ALPN	Common Stock	Sale	-$11.2K	-700	-100%	$16.00	0	Nov 30, 2023	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	ALPN	Stock Option (Right to buy)	Options Exercise	$0	-700	-0.77%	$0.00	90.3K	Nov 30, 2023	Common Stock	700	$3.23	Direct	F1, F2

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

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id	Content
F1	The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 12, 2023.
F2	Twenty-five percent (25%) of the shares subject to the Option shall vest on the one (1) year anniversary of January 23, 2020 (the "Vesting Commencement Date") and one forty-eighth (1/48th) of the shares subject to the Option shall vest each month thereafter on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month), subject to the Reporting Person continuing to be a Service Provider through each such date.

Content

The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 12, 2023.

Twenty-five percent (25%) of the shares subject to the Option shall vest on the one (1) year anniversary of January 23, 2020 (the "Vesting Commencement Date") and one forty-eighth (1/48th) of the shares subject to the Option shall vest each month thereafter on the same day of the month as the Vesting Commencement Date (and if there is no corresponding day, on the last day of the month), subject to the Reporting Person continuing to be a Service Provider through each such date.

Remarks:

Senior Vice President, Chief Financial Officer and Corporate Secretary