Power of Attorney for Andrew Partridge

This filing indicates that Andrew Partridge, Chief Growth Officer at GRAIL, Inc., has granted power of attorney to specific company officers. This delegation allows them to execute and submit Section 16 reports (Forms 3, 4, and 5) to the SEC on his behalf. The power of attorney is effective until Mr. Partridge is no longer required to file these forms, or until he revokes it in writing. This arrangement facilitates compliance with SEC reporting requirements regarding his securities holdings and transactions in the company.