0000950170-23-036124.txt : 20230731 0000950170-23-036124.hdr.sgml : 20230731 20230731214407 ACCESSION NUMBER: 0000950170-23-036124 CONFORMED SUBMISSION TYPE: 144 PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20230731 DATE AS OF CHANGE: 20230731 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: Icosavax, Inc. CENTRAL INDEX KEY: 0001786255 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] IRS NUMBER: 000000000 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 144 SEC ACT: 1933 Act SEC FILE NUMBER: 001-40655 FILM NUMBER: 231129349 BUSINESS ADDRESS: STREET 1: 1930 BOREN AVE., SUITE 1000 CITY: SEATTLE STATE: WA ZIP: 98101 BUSINESS PHONE: (206) 737-0085 MAIL ADDRESS: STREET 1: 1930 BOREN AVE., SUITE 1000 CITY: SEATTLE STATE: WA ZIP: 98101 REPORTING-OWNER: COMPANY DATA: COMPANY CONFORMED NAME: Holtzman Douglas CENTRAL INDEX KEY: 0001874371 FILING VALUES: FORM TYPE: 144 MAIL ADDRESS: STREET 1: 1616 EASTLAKE AVENUE E. STREET 2: SUITE 208 CITY: SEATTLE STATE: WA ZIP: 98102 144 1 primary_doc.xml 144 0001874371 XXXXXXXX LIVE 0001786255 Icosavax, Inc. 001-40655 1930 Boren Avenue Suite 1000 Seattle WA 98101 206-737-0085 Douglas Andrew Holtzman Officer Common Stock Morgan Stanley Smith Barney LLC

Executive Financial Services 1 New York Plaza, 38th Floor New York NY 10004

10375 95138.75 41426850 07/31/2023 NASDAQ Common Stock 07/28/2023 Shares acquired upon vesting of restricted stock units Issuer N 10375 07/30/2021 N/A N DOUGLAS HOLTZMAN

1930 Boren Avenue Suite 1000 Seattle WA 98101

Common Stock 07/03/2023 16356 144742.42 Reflects shares to be sold to cover withholding taxes upon vesting of restricted stock unit awards pursuant to a Rule 10b5-1 instruction letter dated December 5, 2021, and shares to be sold pursuant to a Rule 10b5-1 Trading Plan dated December 2, 2022. 07/31/2023 12/02/2022 /s/ Douglas Holtzman