07:59 AM EDT, 10/29/2025 (MT Newswires) -- Stride (LRN) shares were 42% lower pre-bell Wednesday after the company late Tuesday issued fiscal Q2 and full-year revenue guidance that trailed analysts' projections.

Varonis Systems ( VRNS ) was down 29%, a day after the company approved a $150 million share buyback program and reported lower Q3 earnings.

Fiserv ( FI ) shares were 30% lower after the company reported lower Q3 adjusted earnings and lowered its 2025 financial guidance.

Avantor ( AVTR ) stock was down 16% after the company reported lower Q3 adjusted earnings and sales.