Check out the companies making the biggest moves in pre-market trading:

American steel
Shares fell 7% after President-elect Donald Trump said late Monday that he will block Japan’s Nippon Steel from buying the steelmaker. At the end of 2023, an agreement was reached for Nippon Steel to purchase U.S. Steel. Steel, but has since encountered political opposition.

AT&T
Mobile phone stocks rose nearly 4% after saying it anticipates more than $18 billion in free cash flow in 2027. AT&T on Tuesday laid out its three-year vision, which includes plans to double its wireless Internet availability. fiber and improve your 5G network.

Axon Company
The maker of Tasers used by police departments added nearly 2% after an upgrade at Morgan Stanley to overweight from equal weight. The investment bank said artificial intelligence could help expand Axon Enterprise’s total addressable market.

Financial synchronicity
The Stamford, Connecticut-based credit card issuer rose more than 1% after an upgrade to overweight from the same weight in Wells Fargo. The bank said Synchrony is trading at a cheap valuation and could benefit from regulatory changes under the incoming Trump administration.

Upstart holdings
AI Lending Market shares rose 1.5% following an upgrade in Redburn Atlantic to Buy. The company sees a significant market opportunity with Upstart’s combination of artificial intelligence and a scalable technology platform.

Credo Technology Group
The technology company soared 32% after earnings beat analyst estimates late Monday and issued strong revenue guidance for the current quarter. Adjusted earnings were 7 cents per share on $72 million in revenue in the fiscal second quarter versus Street estimates of 5 cents per share on revenue of $67 million, according to LSEG.

zscaler
The cloud security company’s fiscal second-quarter revenue forecast nearly matched analyst estimates, sending shares down 7% in early trading. Zscaler reported better-than-expected earnings and adjusted revenue in its fiscal first quarter.

CVS Health
Shares rose 1.4% after Deutsche Bank upgraded the pharmacy chain and pharmacy benefit manager to buy from hold. The investment bank believes earnings will rebound and beat consensus estimates.

clean spark
Shares fell nearly 8% after the bitcoin miner reported fiscal 2024 revenue that missed expectations. Revenue of $379 million missed the consensus estimate of $395 million, according to FactSet.

super microcomputer
The maker of artificial intelligence servers rose nearly 8%, adding to its 29% gain on Monday, when a special board committee said it found no evidence of misconduct, nor “any substantial concerns about the integrity of the senior officials of Supermicro.” management or Audit Committee, or its commitment to ensuring that the Company’s financial statements are materially accurate.

CNBC’s Jesse Pound, Hakyung Kim, Sarah Min and Pia Singh contributed reporting.