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The logo of semiconductor design firm Arm on a chip.

Jakub Porzycki | Nurphoto | Getty Images

Exactly two years ago, Nvidia’s attempt to purchase chip designer Arm from SoftBank came to an end due to “significant regulatory challenges.”

Masayoshi Son, SoftBank’s billionaire founder, has never been so lucky.

That agreement would have involved selling Arm for $40 billion, or just $8 billion more than SoftBank paid in 2016. Instead, Arm went public last year, and the company is now worth over $116 billion after the stock soared 48% on Thursday.

SoftBank still owns roughly 90% of the outstanding stock, meaning its stake in Arm increased by over $34 billion in a day.

But the rally is somewhat confounding when looking at how the market values Arm. Wall Street may start to get a clearer sense of how much investors are willing to pay next month, when the 180-day lockup period expires and SoftBank will have its first opportunity to sell.

Analyst says Nvidia has 'significant amount of upside,' but gives his bear case

Chipmakers Nvidia and AMD have been Wall Street darlings of late due to their central position in the artificial intelligence boom. Nvidia makes the bulk of the processors used for cutting-edge AI models like those that power ChatGPT, while large tech companies have also indicated their interest in purchasing competitive chips from AMD as they hit the market.

But Arm is now being valued at a much higher earnings multiple than either of those companies. As of Thursday’s close, investors are valuing Arm at close to 90 times forward earnings. That compares to a forward price-to-earnings ratio of 33 for Nvidia and 46 for AMD, which both have significantly higher multiples than other major chip stocks like Intel and Qualcomm.

In reporting better-than-expected quarterly results on Wednesday, Arm gave investors some new data to suggest that its growth rate could persist through the next fiscal year. Arm said it was breaking into new markets thanks to AI demand, and that its primary market, smartphone technology, was recovering from a slump.

‘Gain market share’

Arm has a different business model than Nvidia and AMD in that it’s largely a technology licensing company. Arm said its royalties business, in which billions of chips manufactured each quarter result in a small fee to use the company’s architecture, was surprisingly strong. That’s because it can charge twice as much for its latest instruction set, called Arm v9, which accounted for 15% of the company’s royalties.

“Arm continues to gain market share in the growth markets of cloud servers and automotive which drive new streams of royalty growth,” the company said in its investor letter.

Arm’s revenue forecast for the current quarter points to 38% annual growth at the midpoint of the range, marking a significant acceleration from recent periods. But for Nvidia, analysts are expecting growth of over 200% for the January quarter and almost that level the next period.

AMD has been growing much slower and is expected to remain in the single digits until the back half of the year, when expansion is expected to accelerate.

Lisa Su, president and CEO of AMD, talks about the AMD EPYC processor during a keynote address at the 2019 CES in Las Vegas, Nevada, U.S., January 9, 2019. 

Steve Marcus | Reuters

While Arm has some AI chip development, its technology is oriented around the central processor, or CPU. AI chips are often graphics processors, or GPUs, which use a different approach to running multiple calculations at the same time.

Still, Arm says it stands to benefit from AI chips. CEO Rene Hass mentioned Nvidia’s Grace Hopper 200 chip, which will start shipping in finished systems in April, on a call with analysts. That chip combines one of Nvidia’s GPUs — an H100 — with a CPU that uses Arm’s Neoverse design.

“The drivers and direction of travel for Arm are as outlined at the time of its IPO, but the timing and slope is sooner and steeper due to AI.” wrote Citi analyst Andrew Gardiner in a note on Thursday. “Given we are in the very early innings of AI adoption, we expect Arm’s sales trends to remain robust into FY25/26.”

The company said that its backlog of expected licensing sales rose 42% on an annual basis to $2.4 billion.

For Son and SoftBank, the fortuitous scuttling of the Nvidia-Arm deal means an opportunity for the Japanese conglomerate to directly benefit from the growth in AI and the premium that Wall Street is placing on chip companies at the center of the action.

SoftBank on Thursday said its Vision Fund investment group logged a $4 billion gain in the latest quarter, after a brutal stretch of losses from bad bets like WeWork. SoftBank said in the December quarter that it booked an investment gain of $5.5 billion thanks to the Arm IPO.

If the stock can hold at these levels or even keep going up, more gains are in store.

“Arm is the biggest contributor to the global AI evolution,” SoftBank finance chief Yoshimitsu Goto said during an earnings presentation on Thursday. He even went so far as to call SoftBank’s investment pool an “AI-centric portfolio.”

— CNBC’s Arjun Kharpal contributed to this report

WATCH: CNBC’s full interview with Arm CEO Rene Haas

Watch CNBC's full interview with Arm Holdings CEO Rene Haas

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Tesla shares climb as Musk pledges to be ‘super focused’ on companies ahead of Starship launch

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Tesla shares climb as Musk pledges to be 'super focused' on companies ahead of Starship launch

Elon Musk listens as reporters ask U.S. President Donald Trump and South Africa President Cyril Ramaphosa questions during a press availability in the Oval Office at the White House on May 21, 2025 in Washington, DC.

Chip Somodevilla | Getty Images

Tesla shares gained about 5% on Tuesday after CEO Elon Musk over the weekend reiterated his intent to home in on his businesses ahead of the latest SpaceX rocket launch.

The billionaire wrote in a post to his social media platform X that he needs to be “super focused” on X, artificial intelligence company xAI and Tesla as they launch “critical technologies” on the heels of a temporary outage.

“As evidenced by the uptime issues this week, major operational improvements need to be made,” he wrote, adding that he would return to “spending 24/7” at work. “The failover redundancy should have worked, but did not.”

An outage over the weekend briefly shuttered the social media platform formerly known as Twitter for thousands of users, according to DownDetector. Earlier in the week, the platform suffered a data center outage. X has suffered a series of outages since Musk purchased the platform in 2022.

Read more CNBC tech news

Musk has previously indicated plans to step away from his political work and prioritize his businesses.

During Tesla’s April earnings call he said that he would “significantly” reduce his time running President Donald Trump‘s Department of Government Efficiency.

In the last election cycle, Musk devoted time and billions of dollars to political causes and toward electing Trump in 2024. However, a story over the weekend from the Washington Post, citing sources familiar with the matter, said that Musk has grown disillusioned with politics and wants to return to managing his businesses.

Last week, Musk said in an interview at the Qatar Economic Forum that he planned to spend “a lot less” on campaign donations going forward.

The comments from Musk precede SpaceX’s Starship rocket Tuesday evening. Pressure is on for the company after two Starship rockets exploded in January and March.

Ahead of the launch, Musk announced an all hands livestream on X at 1 p.m.

Tesla is still facing fallout from Musk’s political foray, with protests at showrooms and other brand damage.

In April, Tesla sold 7,261 cars in Europe, down 49% from last year, according to the European Automobile Manufacturers’ Association.

WATCH: Elon Musk: We have seen a major rebound in demand

Elon Musk: We have seen a major rebound in demand

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Trump advisor Hassett says ‘we don’t want to harm’ Apple with iPhone tariffs

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Trump advisor Hassett says 'we don't want to harm' Apple with iPhone tariffs

NEC Director Kevin Hassett on Trump's iPhone tariff threat: In the end, we don't want to harm Apple

National Economic Council Director Kevin Hassett said Tuesday that the Trump administration does not want to “harm Apple” with tariffs.

“Everybody is trying to make it seem like it’s a catastrophe if there’s a tiny little tariff on them right now, to try to negotiate down the tariffs,” Hassett told CNBC’s “Squawk Box” on Tuesday. “In the end, we’ll see what happens, we’ll see what the update is, but we don’t want to harm Apple.”

Hassett’s comments come after President Donald Trump said in a social media post that Apple will have to pay a tariff of 25% or more for iPhones made outside the U.S. Apple has historically manufactured its products in foreign countries including China, India and Vietnam.

“I have long ago informed Tim Cook of Apple that I expect their iPhone’s that will be sold in the United States of America will be manufactured and built in the United States, not India, or anyplace else,” Trump wrote in the post. “If that is not the case, a Tariff of at least 25% must be paid by Apple to the U.S. Thank your for your attention to this matter!”

By some estimates, a U.S.-made iPhone could cost as much as $3,500.

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“If you think that Apple has a factory some place that’s got a set number of iPhones that it produces and it needs to sell them no matter what, then Apple will bear those tariffs, not consumers, because it’s an elastic supply,” Hassett said.

Hasset’s comments continue the administration’s push to pressure companies to shoulder the cost burden of Trump’s tariffs, instead of raising prices for consumers.

Earlier this month, Trump told retail giant Walmart to “EAT THE TARIFFS” after the company warned it would have to pass those added costs on.

Shares of Apple were up more than 1% Tuesday.

Apple did not immediately respond to CNBC’s request for comment.

WATCH: NEC Director Kevin Hassett on Trump’s iPhone tariff threat: In the end, we don’t want to harm Apple

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Ambience announces OpenAI-powered medical coding model that outperforms physicians

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Ambience announces OpenAI-powered medical coding model that outperforms physicians

Dr. Priti Patel, CMIO at John Muir Health, uses Ambience before starting a patient encounter.

Courtesy of Ambience Healthcare

Artificial intelligence startup Ambience Healthcare on Tuesday announced a new medical coding model that outperforms doctors by 27%.

Ambience uses AI to draft clinical notes in real-time as doctors consensually record their visits with patients. The company used tools from OpenAI to build the new model.

The startup is part of a fiercely competitive market that has taken off as health-care executives search for solutions to help reduce staff burnout and daunting administrative workloads. 

The company’s new model can listen to patient encounters and identify ICD-10 codes, which are internationally standardized classifications for different diseases and conditions. There are about 70,000 ICD-10 codes that are regularly updated and used to facilitate billing and other reporting processes in health care. 

Ambience said its new ICD-10 model can reduce billing mistakes and help clinicians and professional coders work more efficiently. The model notched a “27% relative improvement over physician benchmarks,” according to a release on Tuesday.  

“We’re not replacing doctors or coders,” Brendan Fortuner, Ambience’s head of engineering, told CNBC in an interview. “What we’re doing is we’re liberating them from administration, and we’re fixing mistakes that help make health care better, safer, more cost-effective.”

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Documenting ICD-10 codes has traditionally been a labor-intensive task in health care, but it’s a crucial way to track outcomes, mortalities and morbidities in a standardized way, said Dr. Will Morris, the chief medical officer of Ambience.

“If you think about it from a data perspective, it’s how you can compare and contrast clinician A to B, or health system A to B,” Morris said in an interview. “It’s the cornerstone for quality.”

Ambience’s technology is used at more than 40 health-care organizations, like Cleveland Clinic and UCSF Health. It has raised more than $100 million, according to PitchBook, from investors including Kleiner Perkins, Andreessen Horowitz and the OpenAI Startup Fund. 

The company is reportedly seeking fresh capital at a valuation of over $1 billion, according to a report from The Information. Ambience declined to comment on the report. 

Ambience trained its new AI model using OpenAI’s reinforcement fine-tuning technology. This technology allows companies to tune OpenAI’s best reasoning models for very specific domains, like health care. 

To validate the model, Ambience tested it against a “gold panel” set of labels, the company said. The labels were established by a group of expert clinicians who evaluated complex clinical cases and came to an agreement on what the right codes were. 

Ambience’s AI platform for compliant documentation, CDI, and coding.

Courtesy of Ambience Healthcare

The company then recruited 18 different board-certified doctors and compared their performance on ICD-10 coding accuracy to the model’s performance. That comparison showed the Ambience technology performed 27% better than the physician baseline. 

“It shows for the first time that an AI system can actually surpass clinician experts at a very, very important administrative task, especially in coding,” Fortuner said. 

Ambience already has similar capabilities available for other medical codes like Current Procedural Terminology (CPT) codes, and Fortuner said it’s exploring how to tackle other areas like prior authorizations, utilization management and clinical trial matching. 

The company’s new ICD-10 model will roll out to customers over the summer.

“Getting it right at the point of care is a fundamental change,” Morris said.

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