Meta CEO Mark Zuckerberg Discloses $21.4M in Planned 10b5-1 Share Sales

Executive Summary

On September 28, 2026, a Form 4 filing was submitted on behalf of Mark Zuckerberg, Chairman and Chief Executive Officer of Meta Platforms, Inc. ($META). The filing discloses transactions executed on September 24, 2026, comprising the conversion of 17,140 shares of Class B Common Stock to Class A Common Stock and the subsequent open-market sale of 27,474 shares of Class A Common Stock across multiple entities for an aggregate value of approximately $21.36 million.

Transaction Details

All reported sales were executed pursuant to pre-established Rule 10b5-1 trading plans adopted on January 31, 2026:

1. CZI Holdings, LLC:

   • Converted 17,140 shares of Class B Common Stock into 17,140 shares of Class A Common Stock at $0 per share.
   • Sold 17,140 shares of Class A Common Stock in multiple tranches at weighted-average prices ranging from $775.3906 to $779.3263 per share, generating gross proceeds of approximately $13.33 million.
   • Following the sales, CZI Holdings, LLC retained 0 shares of Class A Common Stock and 100,102,127 shares of Class B Common Stock.

2. Chan Zuckerberg Biohub, Inc.:

   • Sold 10,334 shares of Class A Common Stock in multiple tranches at weighted-average prices ranging from $775.3185 to $779.2765 per share, generating gross proceeds of approximately $8.03 million.
   • The reporting person exercises voting and investment power over these shares but disclaims pecuniary interest.
   • CZ Biohub held 1,220,703 shares of Class A Common Stock following the reported transactions.

Strategic & Market Significance

• Routine Nature: These dispositions were executed strictly in accordance with a Rule 10b5-1 trading plan established on January 31, 2026, mitigating concerns regarding opportunistic or material non-public information trading.
• Significance Assessment: Rated Low. The combined sale of 27,474 shares represents a fraction of 1% of Mark Zuckerberg's total voting control and aggregate beneficial equity interest across various entities (which exceeds 290 million Class B shares).
• Impact: No operational or governance changes are implied, as the transactions represent ongoing philanthropic and planned estate liquidity programs.