Reddit shares jump 6% as user growth hits fastest pace in 2026, despite upcoming audience measurement reset.

Reddit's stock surged 6% following third-party data showing its user base grew 8% month-over-month in August, marking the fastest growth this year. International users led the surge with a 29.3% year-over-year increase, supporting Reddit's goal of 1 billion daily global users. However, Piper Sandler warned of an upcoming 20% reset in reported audience size due to changes in Reddit's ads manager model, which could affect future reported numbers. Meanwhile, Pinterest and Snap also saw modest gains, indicating no sector-wide advertising reset. Investors should watch for Reddit's next quarterly report to see if growth holds under the new measurement system.