Backblaze (BLZE) shares were up 46% in Tuesday premarket activity after the company reported late Monday a swing to Q1 non-GAAP net income and higher revenue.

3 E Network Technology (MASK) stock was 40% higher, a day after the company said it signed a securities purchase agreement with an institutional investor.

Pinterest (PINS) shares were up 18% after the company posted overnight higher Q1 non-GAAP earnings and revenue that also beat analysts' estimates.

Biodesix (BDSX) stock was 16% higher, a day after the company reported a narrower Q1 net loss and higher revenue.