Stocks making the biggest moves after hours: Costco, Marvell Technology, Gap & more

Check out the companies making headlines in after-hours trading. Costco Wholesale — Shares of the big-box retailer dipped less than 1% in the after-hours session. Costco reported $4.58 cents per share in earnings on revenue of $69.6 billion in the fiscal second quarter, while analysts polled by LSEG expected $4.56 cents per share in earnings on revenue of $69.29 billion. Membership fees totaled $1.36 billion, reflecting a 13.6% gain year over year. Marvell Technology — The company, which makes integrated circuits and semiconductor products, saw shares surge 14% on the back of strong quarterly results led by artificial intelligence demand. For its fourth quarter, Marvell reported adjusted earnings of 80 cents per share on revenue of $2.22 billion. Analysts polled by LSEG were expecting earnings of 79 cents per share and revenue of $2.21 billion. Management said Marvell expects its year-over-year revenue growth to increase each quarter in fiscal 2027. Gap — The apparel maker’s stock slid almost 8% after Gap reported fourth-quarter earnings of 45 cents per share, just shy of analysts’ forecast of 46 cents a share, per LSEG. Gap’s revenue came in line with expectations at $4.24 billion. Samsara — Shares jumped more than 11% after the telematics software company reported rosy guidance. Samsara sees full-year adjusted earnings ranging from 65 cents to 69 cents per share and revenue between $1.97 billion and $1.98 billion. The LSEG consensus called for 59 cents per share in earnings and $1.92 billion in revenue. The company also said in a press release it’s now using AI to automate workflows and enhance operations. Guidewire Software — Shares gained about 4% after the software company for property and casualty insurers posted second quarter results that exceeded expectations. Guidewire Software posted earnings of $1.17 per share, on an adjusted basis, on revenue of $359.1 million. Analysts polled by LSEG anticipated earnings of 77 cents on revenue of $342 million. Cooper Companies – The medical device company added 3% in extended trading. Cooper raised guidance for the full year, calling for adjusted earnings of $4.58 to $4.66 per share. That tops the FactSet consensus for $4.52 per share. Profit in the first quarter came in ahead of the Street’s estimates, as well. — Alex Harring, Sarah Min, Davis Giangiulio and Darla Mercado contributed reporting.