374WATER INC. Special Meeting Summary

Event: Special Stockholder Meeting on December 15, 2025 (Virtual).

Key Investor Focus: Proposal 1

• Seeks approval for an amendment allowing the Board to enact a reverse stock split between a 1-for-8 and 1-for-20 ratio, effective before December 26, 2025.
• The specific ratio will be determined by the Board without further stockholder approval.
• The Board recommends voting ‘FOR’ this proposal.

Important Deadlines:

• Record Date: October 24, 2025.
• Voting Deadline: December 14, 2025.

This communication is a notice; vo