Sec Form 4 Filing - Alta Partners Management VIII, LLC @ Allakos Inc. - 2023-08-16

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Alta Partners Management VIII, LLC 2. Issuer Name and Ticker or Trading Symbol Allakos Inc. [ ALLK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 115 W SNOW KING AVE, SUITE 101B 3. Date of Earliest Transaction (MM/DD/YY) 08/16/2023 (Street) JACKSON, WY83001 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 08/16/2023 J( 1 ) 6,448,053 D $ 0 0 I By Alta Partners VIII, L.P. ( 2 ) Common Stock 08/16/2023 J( 3 ) 1,463,378 A $ 0 1,463,378 D Common Stock 08/16/2023 J( 4 ) 1,463,378 D $ 0 0 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Alta Partners Management VIII, LLC 115 W SNOW KING AVE, SUITE 101B JACKSON, WY83001 X Alta Partners VIII, L.P. 115 W SNOW KING AVE, SUITE 101B JACKSON, WY83001 X Signatures Alta Partners Management VIII, LLC, By /s/ Daniel Janney, Managing Director 08/18/2023 Signature of Reporting Person Date Alta Partners Management VIII, LLC, By /s/ Daniel Janney, Managing Director, By Alta Partners Management VIII, LLC, its general partner, By /s/ Daniel Janney, Managing Director 08/18/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents a pro-rata in-kind distribution of common stock of the Issuer by Alta Partners VIII, L.P. ("Alta VIII") in connection with the winding down of its operations, without consideration, to its general partner and limited partners. ( 2 )The shares are directly held by Alta VIII. Alta Partners Management VIII, LLC ("Alta Management VIII") is the general partner of Alta VIII and, as such, may be deemed to share voting and investment control with respect to the shares held by Alta VIII. Alta Management VIII disclaims beneficial ownership of all shares held by Alta VIII, except to the extent of its pecuniary interest therein. ( 3 )Represents receipt of shares in the distribution in kind described in footnote (1). ( 4 )Represents a pro-rata in-kind distribution of common stock of the Issuer by Alta Management VIII, without consideration, to its members.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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