Ronald Oyston - May 9, 2023 Form 4 Insider Report for ACELYRIN, Inc. (SLRN)

Role
Chief People Officer
Signature
/s/ Mina Kim, Attorney-in-fact
Stock symbol
SLRN
Transactions as of
May 9, 2023
Transactions value $
$18,468
Form type
4
Date filed
5/11/2023, 09:00 PM
Previous filing
May 4, 2023
Next filing
Aug 18, 2023

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SLRN Common Stock Purchase $18K +1K $18.00 1K May 9, 2023 Direct F1
transaction SLRN Common Stock Purchase $468 +26 $18.00 26 May 9, 2023 See footnote F1, F2

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 SLRN Employee Stock Option (right to buy) Other $0 -165K -100% $0.00* 0 May 9, 2023 Class A Common Stock 165K $4.04 Direct F3, F4
transaction SLRN Employee Stock Option (right to buy) Other $0 +165K $0.00 165K May 9, 2023 Common Stock 165K $4.04 Direct F3, F4
transaction SLRN Employee Stock Option (right to buy) Other $0 -2.15K -100% $0.00* 0 May 9, 2023 Class A Common Stock 2.15K $4.04 Direct F3, F5
transaction SLRN Employee Stock Option (right to buy) Other $0 +2.15K $0.00 2.15K May 9, 2023 Common Stock 2.15K $4.04 Direct F3, F5
transaction SLRN Employee Stock Option (right to buy) Other $0 -23.4K -100% $0.00* 0 May 9, 2023 Class A Common Stock 23.4K $5.88 Direct F3, F6
transaction SLRN Employee Stock Option (right to buy) Other $0 +23.4K $0.00 23.4K May 9, 2023 Common Stock 23.4K $5.88 Direct F3, F6
transaction SLRN Employee Stock Option (right to buy) Other $0 -16.6K -100% $0.00* 0 May 9, 2023 Class A Common Stock 16.6K $5.88 Direct F3, F7
transaction SLRN Employee Stock Option (right to buy) Other $0 +16.6K $0.00 16.6K May 9, 2023 Common Stock 16.6K $5.88 Direct F3, F7
transaction SLRN Employee Stock Option (right to buy) Other $0 -132K -100% $0.00* 0 May 9, 2023 Class A Common Stock 132K $18.00 Direct F3, F8
transaction SLRN Employee Stock Option (right to buy) Other $0 +132K $0.00 132K May 9, 2023 Common Stock 132K $18.00 Direct F3, F8
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Reflects shares purchased through a directed share program in the Issuer's initial public offering of Common Stock (the "IPO").
F2 The shares are held of record by the Reporting Person's child.
F3 Each share of Class A Common Stock was reclassified into one share of Common Stock immediately prior to the completion of the IPO.
F4 1/4 of the shares subject to the option vested on November 1, 2022, and 1/48 of the shares subject to the option vests in equal monthly installments thereafter, subject to the Reporting Person's continued service.
F5 1/4 of the shares subject to the option vested on January 20, 2023, and 1/48 of the shares subject to the option vest in equal monthly installments thereafter, subject to the Reporting Person's continued service.
F6 1/4 of the shares subject to the option vest on October 1, 2023, and 1/48 of the shares subject to the option vests in equal monthly installments thereafter, subject to the Reporting Person's continued service.
F7 1/4 of the shares subject to the option vest on November 17, 2023, and 1/48 of the shares subject to the option vests in equal monthly installments thereafter, subject to the Reporting Person's continued service.
F8 1/4 of the shares subject to the option vest on May 4, 2024, and 1/48 of the shares subject to the option vest in equal monthly installments thereafter, subject to the Reporting Person's continued service.