X0609 4 2026-09-09 0 0001326801 Meta Platforms, Inc. META 0001607459 Cox Christopher K false C/O META PLATFORMS, INC. 1 META WAY MENLO PARK CA 94025 0 1 0 0 Chief Product Officer 1 Class A Common Stock 2026-09-09 4 S 0 18578 650.2121 D 245938 I Christopher K. Cox Revocable Trust Class A Common Stock 2026-09-09 4 S 0 1422 651.1496 D 244516 I Christopher K. Cox Revocable Trust Class A Common Stock 55046 I Cox-Vadakan Irrevocable Remainder Trust The sales reported were effected pursuant to the Rule 10b5-1 trading plan adopted by the reporting person on May 19, 2026. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $650.00 to $650.93 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Shares held of record by Christopher K. Cox, Trustee of The Christopher K. Cox Revocable Trust. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $651.015 to $651.26 per share. The holder undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon written request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Shares held of record by Christopher K. Cox and Visra Vichit-Vadakan, Co-Trustees of The Cox-Vadakan Irrevocable Remainder Trust. /s/ Erin Guldiken, attorney-in-fact for Christopher K. Cox 2026-09-11