X0609 4 2026-04-08 0001703399 Sea Ltd SE 0002114135 Ma David Y true C/O 1 FUSIONOPOLIS PLACE, #17-10, GALAXIS SINGAPORE SINGAPORE U0 138522 SINGAPORE true false false false true Class A ordinary shares 2026-04-08 4 S false 38981 85.66 D 1414411 I By BVI entity Class A ordinary shares 2026-04-08 4 S false 56880 86.83 D 1357531 I By BVI entity Class A ordinary shares 2026-04-08 4 S false 48740 87.43 D 1308791 I By BVI entity Class A ordinary shares 2026-04-08 4 S false 8186 88.36 D 1300605 I By BVI entity Class A ordinary shares 2026-04-08 4 S false 7493 89.33 D 1293112 I By BVI entity Class A ordinary shares 2026-04-08 4 S false 500 91.59 D 1292612 I By BVI entity Class A ordinary shares 2026-04-08 4 S false 2689 92.26 D 1289923 I By BVI entity Class A ordinary shares 2026-04-09 4 S false 14536 85.31 D 1275387 I By BVI entity Class A ordinary shares 10000 D The shares were sold pursuant to a Rule 10b5-1 trading plan adopted by a BVI entity controlled by an immediate family member sharing the same household as the Reporting Person on December 12, 2025. Represents the weighted average price of shares sold at prices that ranged from $85.15 to $86.145. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares sold at each separate price within the ranges set forth in this Form 4. Represents the weighted average price of shares sold at prices that ranged from $86.15 to $87.14. Represents the weighted average price of shares sold at prices that ranged from $87.15 to $88.145. Represents the weighted average price of shares sold at prices that ranged from $88.15 to $88.59. Represents the weighted average price of shares sold at prices that ranged from $89.20 to $89.55. Represents the weighted average price of shares sold at prices that ranged from $91.58 to $91.65. Represents the weighted average price of shares sold at prices that ranged from $92.26 to $92.48. Represents the weighted average price of shares sold at prices that ranged from $85.00 to $85.50. /s/ Mark Tang, attorney-in-fact for David Y Ma 2026-04-10