After-Hours Stock Movers:

McDonald's (NYSE:MCD)

McDonald's fell 9% after the CDC reported a severe E Coli outbreak linked to the chain, resulting in 49 illnesses and one death.

Starbucks (NASDAQ:SBUX)

Starbucks declined 4% after releasing preliminary fourth quarter results that fell below consensus estimates, mainly due to a 6% drop in U.S. comparable store sales.

Seagate Technology (STX)

Seagate Technology saw a 3% decline despite exceeding EPS and revenue consensus estimates, as lackluster guidance dampened investor sentiment.

Enphase Energy (NASDAQ:ENPH)

Enphase Energy fell 7% after its third quarter results missed consensus, with fourth quarter revenue guidance failing to meet average analyst expectations.

Stride Inc. (NYSE:LRN)

Stride Inc. surged 22% following better-than-expected quarterly results, with first quarter enrollments reaching 222.6K, an 18.5% increase from the previous year.

Alto Neuroscience (ANRO)

Alto Neuroscience plummeted 57% after announcing that ALTO-100 did not improve depressive symptoms compared to placebo in patients with a specific cognitive biomarker.