Beth C. Seidenberg - May 4, 2023 Form 3 Insider Report for ACELYRIN, Inc. (SLRN)

Role
Director, 10%+ Owner
Signature
/s/ Mina Kim, Attorney-in-fact
Stock symbol
SLRN
Transactions as of
May 4, 2023
Transactions value $
$0
Form type
3
Date filed
5/4/2023, 07:32 PM
Previous filing
Apr 3, 2023
Next filing
May 11, 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
holding SLRN Series A Redeemable Convertible Preferred Stock May 4, 2023 Class A Common Stock 4.06M See footnote F1, F2, F3
holding SLRN Series B Redeemable Convertible Preferred Stock May 4, 2023 Class A Common Stock 2.45M See footnote F1, F2, F3
holding SLRN Series C Redeemable Convertible Preferred Stock May 4, 2023 Class A Common Stock 2.04M See footnote F1, F2, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each share of preferred stock is convertible into one share of Class A Common Stock or, subject to and in accordance with certain provisions set forth in the Issuer's certificate of incorporation, Class B Common Stock, and has no expiration date. Immediately prior to the completion of the Issuer's initial public offering of Common Stock (the "IPO"), all shares of preferred stock will automatically convert into shares of Common Stock.
F2 Each share of Class A Common Stock shall be reclassified into one share of Common Stock immediately prior to the completion of the IPO.
F3 Shares held directly by Westlake BioPartners Fund II, L.P., or Westlake Fund II. Westlake BioPartners GP II, LLC, or Westlake GP II, is the general partner of Westlake Fund II. Westlake GP II may be deemed to have sole voting and dispositive power with regard to the shares held directly by Westlake Fund II. The Reporting Person and Sean E. Harper are the Managing Directors of Westlake GP II and share voting and dispositive power over the shares held by Westlake Fund II, each of whom disclaims beneficial ownership of the shares held by Westlake Fund II except to the extent of such person's pecuniary interest therein, if any.

Remarks:

Exhibit 24 - Power of Attorney