Mina Kim - Jan 23, 2025 Form 4 Insider Report for ACELYRIN, Inc. (SLRN)

Role: Chief Executive Officer, Director
Signature: /s/ Eddie Kim, Attorney-in-fact
Stock symbol: SLRN
Transactions as of: Jan 23, 2025
Transactions value $: $0
Form type: 4
Date filed: 1/24/2025, 06:02 PM
Previous filing: May 28, 2024
Next filing: Mar 19, 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SLRN	Common Stock	Award	$0	+575K	+501.14%	$0.00	690K	Jan 23, 2025	Direct	F1, F2

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

Explanation of Responses:

Id	Content
F1	Represents Restricted Stock Units (RSUs) that vest in twelve (12) equal quarterly installments over three (3) years, beginning on March 15, 2025, and continuing on June 15, September 15, and December 15, 2025, and on the same dates in each subsequent year, subject to the Reporting Person's continued service through each vesting date.
F2	Includes 4,000 shares of Common Stock acquired pursuant to the Issuer's 2023 Employee Stock Purchase Plan (ESPP) for the purchase period from June 15, 2024, to December 14, 2024. This transaction is exempt under Rule 16b-3(c). In accordance with the ESPP, these shares were purchased at a price equal to 85% of the closing price of the Issuer's Common Stock on December 13, 2024, the last trading day immediately preceding the purchase period end date.

Content

Represents Restricted Stock Units (RSUs) that vest in twelve (12) equal quarterly installments over three (3) years, beginning on March 15, 2025, and continuing on June 15, September 15, and December 15, 2025, and on the same dates in each subsequent year, subject to the Reporting Person's continued service through each vesting date.

Includes 4,000 shares of Common Stock acquired pursuant to the Issuer's 2023 Employee Stock Purchase Plan (ESPP) for the purchase period from June 15, 2024, to December 14, 2024. This transaction is exempt under Rule 16b-3(c). In accordance with the ESPP, these shares were purchased at a price equal to 85% of the closing price of the Issuer's Common Stock on December 13, 2024, the last trading day immediately preceding the purchase period end date.