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

Role
CFO and CBO
Signature
/s/ Mina Kim, Attorney-in-fact
Stock symbol
SLRN
Transactions as of
May 9, 2023
Transactions value $
$131,508
Form type
4
Date filed
5/11/2023, 08:51 PM
Previous filing
May 4, 2023
Next filing
Jun 15, 2023

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction SLRN Common Stock Purchase $100K +5.56K $18.00 5.56K May 9, 2023 Direct F1
transaction SLRN Common Stock Purchase $15.8K +875 $18.00 875 May 9, 2023 See footnote F1, F2
transaction SLRN Common Stock Purchase $15.8K +875 $18.00 875 May 9, 2023 See footnote F1, F3

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 -674K -100% $0.00* 0 May 9, 2023 Class A Common Stock 674K $5.88 Direct F4, F5
transaction SLRN Employee Stock Option (right to buy) Other $0 +674K $0.00 674K May 9, 2023 Common Stock 674K $5.88 Direct F4, F5
transaction SLRN Employee Stock Option (right to buy) Other $0 -85.2K -100% $0.00* 0 May 9, 2023 Class A Common Stock 85.2K $18.00 Direct F4, F6
transaction SLRN Employee Stock Option (right to buy) Other $0 +85.2K $0.00 85.2K May 9, 2023 Common Stock 85.2K $18.00 Direct F4, F6
* 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 one of the Reporting Person's children.
F3 The shares are held of record by another one of the Reporting Person's children.
F4 Each share of Class A Common Stock was reclassified into one share of Common Stock immediately prior to the completion of the IPO.
F5 1/4 of the shares subject to the option vest on November 15, 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.
F6 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.