X0508 4 2025-12-16 0 0001713445 Reddit, Inc. RDDT 0001924278 Lee Benjamin Seong C/O REDDIT, INC. 303 2ND STREET, SOUTH TOWER, 5TH FLOOR SAN FRANCISCO CA 94107 0 1 0 0 Chief Legal Officer 1 Class A Common Stock 2025-12-16 4 M 0 50000 7.92 A 117613 D Class A Common Stock 2025-12-16 4 S 0 400 216.43 D 117213 D Class A Common Stock 2025-12-16 4 S 0 1063 217.89 D 116150 D Class A Common Stock 2025-12-16 4 S 0 2600 219 D 113550 D Class A Common Stock 2025-12-16 4 S 0 23040 219.97 D 90510 D Class A Common Stock 2025-12-16 4 S 0 4675 220.91 D 85835 D Class A Common Stock 2025-12-16 4 S 0 9270 222 D 76565 D Class A Common Stock 2025-12-16 4 S 0 4153 222.92 D 72412 D Class A Common Stock 2025-12-16 4 S 0 9804 223.93 D 62608 D Class A Common Stock 2025-12-18 4 M 0 18750 7.92 A 81358 D Class A Common Stock 2025-12-18 4 S 0 18750 240 D 62608 D Stock Option (Right to Buy) 7.92 2025-12-16 4 M 0 50000 0 D 2029-10-15 Class A Common Stock 50000 199500 D Stock Option (Right to Buy) 7.92 2025-12-18 4 M 0 18750 0 D 2029-10-15 Class A Common Stock 18750 180750 D The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 11, 2025. The sales were executed in multiple trades at prices ranging from $216.20 to $216.59. The price reported reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price within the ranges set forth in footnotes (2) to (9) to this Form 4. The sales were executed in multiple trades at prices ranging from $217.22 to $218.21. The sales were executed in multiple trades at prices ranging from $218.36 to $219.33. The sales were executed in multiple trades at prices ranging from $219.36 to $220.28. The sales were executed in multiple trades at prices ranging from $220.37 to $221.36. The sales were executed in multiple trades at prices ranging from $221.42 to $222.41. The sales were executed in multiple trades at prices ranging from $222.47 to $223.44. The sales were executed in multiple trades at prices ranging from $223.50 to $224.49. The stock option is fully vested and currently exercisable. /s/ Julie Rogers, Attorney-in-Fact 2025-12-18