Melanie Gloria - 09 May 2023 Form 4 Insider Report for ACELYRIN, Inc. (SLRN)

Signature
/s/ Mina Kim, Attorney-in-fact
Issuer symbol
SLRN
Transactions as of
09 May 2023
Net transactions value
$0
Form type
4
Filing time
11 May 2023, 20:56:25 UTC
Previous filing
04 May 2023
Next filing
18 Aug 2023

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 -330,181 -100% $0.000000* 0 09 May 2023 Class A Common Stock 330,181 $4.04 Direct F1, F2
transaction SLRN Employee Stock Option (right to buy) Other $0 +330,181 $0.000000 330,181 09 May 2023 Common Stock 330,181 $4.04 Direct F1, F2
transaction SLRN Employee Stock Option (right to buy) Other $0 -187,988 -100% $0.000000* 0 09 May 2023 Class A Common Stock 187,988 $5.88 Direct F1, F3
transaction SLRN Employee Stock Option (right to buy) Other $0 +187,988 $0.000000 187,988 09 May 2023 Common Stock 187,988 $5.88 Direct F1, F3
transaction SLRN Employee Stock Option (right to buy) Other $0 -232,436 -100% $0.000000* 0 09 May 2023 Class A Common Stock 232,436 $18.00 Direct F1, F4
transaction SLRN Employee Stock Option (right to buy) Other $0 +232,436 $0.000000 232,436 09 May 2023 Common Stock 232,436 $18.00 Direct F1, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each share of Class A Common Stock was reclassified into one share of Common Stock immediately prior to the completion of the Issuer's initial public offering of Common Stock.
F2 1/4 of the shares subject to the option vested on November 8, 2022 and 1/48 of the shares subject to the option vest in equal monthly installments thereafter, subject to the Reporting Person's continued service.
F3 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.
F4 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.