Sage Therapeutics' financials indicate a need for additional funding in 2025, risking dilution and further financial instability. Learn more on SAGE stock here.

Sage stock rose 35% to $7.51 in premarket trading Monday; it closed at $5.55 on Friday. Biogen shares dipped 0.5% to $48.01. Sage’s board will now review and evaluate the offer,

Sage Therapeutics Inc. (NASDAQ:SAGE) confirmed that Biogen Inc. (NASDAQ:BIIB) submitted an unsolicited, nonbinding proposal to acquire all of the outstanding shares of Sage Therapeutics not already owned by Biogen for $7.

Today's sure has SAGE on track for its largest single-day percentage gain since January 2019. Though further removed from their Nov. 20 record low of $4.62, the shares are still down 72% year over year.