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Cover
Jun. 24, 2024
Cover [Abstract]  
Amendment Flag true
Entity Central Index Key 0001699031
Document Type 8-K/A
Document Period End Date Jun. 24, 2024
Entity Registrant Name GRAIL, Inc.
Entity Incorporation, State or Country Code DE
Entity File Number 001-42045
Entity Tax Identification Number 86-3673636
Entity Address, Address Line One 1525 O’Brien Drive
Entity Address, City or Town Menlo Park
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94025
City Area Code 833
Local Phone Number 694-2553
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.001 per share
Trading Symbol GRAL
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Entity Ex Transition Period false
Amendment Description On June 24, 2024 (the “Distribution Date”), GRAIL, Inc. (“GRAIL” or the “Company”) filed a Current Report on Form 8-K (the “Original 8-K”) in connection with the completion of the separation of the Company from Illumina, Inc. (“Illumina”) through Illumina’s pro rata distribution of 85.5% of the outstanding shares of the Company’s common stock to holders of record of Illumina common stock as of the close of business on June 13, 2024 (the “Distribution”). The Original 8-K made reference to certain information contained in the Company’s Information Statement, which is included as Exhibit 99.1 to Amendment No. 2 to the Company’s Registration Statement on Form 10 (File No. 001-42045) filed with the Securities and Exchange Commission on June 3, 2024 (the “Information Statement”).The Original 8-K reported, among other things, the effectiveness of the GRAIL, Inc. 2024 Incentive Award Plan (the “2024 Plan”) and the GRAIL, Inc. 2024 Employee Stock Purchase Plan (the “ESPP”), each as of June 21, 2024. The purpose of this amendment is to provide additional information regarding the 2024 Plan and the ESPP, and to add certain exhibits. No other changes have been made to the Original 8-K.