X0609 4 2026-10-05 0 0001834622 Hayward Holdings, Inc. HAYW 0001851021 HOLLERAN KEVIN false HAYWARD HOLDINGS, INC. 1415 VANTAGE PARK DRIVE, SUITE 400 CHARLOTTE NC 28203 1 1 0 0 President and CEO 1 Common Stock 2026-10-05 4 M 0 50000 1.40 A 451234 D Common Stock 2026-10-05 4 S 0 50000 12.4009 D 401234 D Common Stock 700 I By Child Common Stock 300000 I By GRAT Stock Options (Right to Buy) 1.40 2026-10-05 4 M 0 50000 0 D 2021-08-12 2029-12-24 Common Stock 50000 1880236 D The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted on March 10, 2026. The price reported is a weighted average price. These shares were sold in multiple transactions ranging from $12.2450 to $12.5250, inclusive. The Reporting Person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. /s/ Susan Canning, attorney-in-fact 2026-10-07