Stocks making the biggest moves midday: Bloom Energy, Costco Wholesale, Alphabet & more

January 8, 2026

TL;DR

Alphabet shares hit a new all-time high, boosted by AI capabilities and new Gemini AI features in Gmail.
Costco reported an 8.5% increase in net sales for December, leading to a 5% rise in its stock price.
Karman's stock jumped 10% on news of its acquisition of two maritime defense tech companies for approximately $220 million.
Bloom Energy shares rallied over 13% after American Electric Power exercised an option to purchase solid oxide fuel cells for about $2.65 billion.
Data storage stocks like Western Digital, Sandisk, and Seagate Technology tumbled as investors cashed in.
Defense stocks, including Lockheed Martin, L3Harris Technologies, and Northrop Grumman, gained following a call for a $1.5 trillion defense budget.
Applied Digital's shares moved higher after beating earnings and revenue expectations for its fiscal second quarter.
Gap added more than 6% following an upgrade to 'buy' at UBS, anticipating a turnaround in sales and earnings.
Alcoa fell 3% after a downgrade to 'underweight' by JPMorgan due to uncertainty around tariffs and valuation.
Generac rose 2% on an upgrade to 'buy' from Citigroup, which believes the stock's recent pullback is overdone.
Constellation Brands added nearly 2% following better-than-expected third-quarter results.
Shell's stock fell more than 3% after issuing a weaker fourth-quarter outlook, particularly for its Chemicals & Products segment.

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