Shares of Novo Nordisk ( NVO 2.48%) are falling this week, down 33% as of 3:27 p.m. ET on Friday. The drop comes as the S&P 500 lost 2.4%, and the Nasdaq-100 lost 2.2%. The Danish pharmaceutical giant's stock was hit after it released disappointing earnings showing that sales of its blockbuster GLP-1 drugs remain weaker than hoped.

Partially as a result, Novo Nordisk stock has steadily declined since last summer. Over the past year, NVO shares are down more than 57%. And since the beginning of 2025, the company’s share price has declined more than 35%. As of the time of this writing, NVO shares are down just over 20% this morning to $55.17 per share.

Shares in Novo Nordisk fell as much as 6% on Friday before recovering some ground later in the session, extending recent losses that threaten to wipe out all the gains since the drugmaker launched its blockbuster weight-loss treatment Wegovy four years ago.