X0708 D LIVE 0002080138 Fathom Water Corp 6507 102ND AVE NE KIRKLAND WA WASHINGTON 98033 425-380-6470 DELAWARE None None Corporation true 2025 Nathan Scott Haralson c/o Fathom Water Corporation 6507 102nd Ave NE Kirkland WA WASHINGTON 98033 Executive Officer Director Anthony Schena c/o Fathom Water Corporation 6507 102nd Ave NE Kirkland WA WASHINGTON 98033 Director Other Technology Decline to Disclose 06b false 2026-10-16 false true true false 0 5399997 4299999 1099998 Total Offering Amount and Total Amount Sold include the conversion of SAFEs. false 10 0 0 0 true false Fathom Water Corp /s/ Nathan Scott Haralson Nathan Scott Haralson President 2026-10-28