X0609 4 2026-05-19 0 0001833197 Latham Group, Inc. SWIM 0001430183 Cline James E false C/O LATHAM GROUP, INC. 787 WATERVLIET SHAKER ROAD LATHAM NY 12110 1 0 0 0 0 Common stock, par value $0.0001 per share 2026-05-19 4 P 0 50000 4.84 A 100000 I Held by Cynthia L. Cline Revocable Trust Common stock, par value $0.0001 per share 455883 I Held by James E. Cline Revocable Trust Common stock, par value $0.0001 per share 211978 D Weighted average price. These shares were purchased in multiple transactions at prices ranging from $4.805 to $4.84 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth above. /s/ Patrick M. Sheller, Attorney-in-Fact 2026-05-20