A war of words between Elon Musk and Sam Altman escalated on social media Thursday, as two of the most powerful men in tech sparred over their rival artificial intelligence initiatives. 

The latest exchange began after OpenAI, where Altman is CEO, was revealed as a key player in Stargate, the AI infrastructure project President Donald Trump announced this week that is coming with a massive investment push.

“They don’t actually have the money,” Musk wrote in a long post on his social platform, X, about the new venture. It was not immediately clear whom Musk was initially referring to, but he soon followed up, naming SoftBank, Stargate’s main financial backer.

“SoftBank has well under $10B secured. I have that on good authority,” he said, without elaborating. Neither Musk nor his electronic car company Tesla have publicized any formal links.   

Altman responded praising Musk — “I genuinely respect your accomplishments and think you are the most inspiring entrepreneur of our time,” he wrote on X — but he called his SoftBank claim wrong. 

“I realize what is great for the country isn’t always what’s optimal for your companies, but in your new role i hope you’ll mostly put [America] first,” he added, using an American flag emoji.

In remarks to reporters Thursday, Trump weighed in on the dispute but gave no indication that Altman’s or OpenAI’s status on the project were threatened.

Without mentioning Altman by name, Trump mentioned Musk while referring to ‘one of the people he happens to hate.’

‘But I have certain hatreds of people, too,’ he said.

The spat has its roots in a pending lawsuit filed by Musk, a co-founder of OpenAI, over control of the company; it was rekindled after Trump’s announcement this week that OpenAI would be part of the $500 billion Stargate initiative designed to make the United States a world leader in AI.

Late Wednesday and into Thursday, Musk continued to hammer Altman, repeatedly citing posts during Trump’s 2016 presidential run in which Altman appeared to denounce Trump. 

By 8:30 p.m., Altman posted that he’d recently had a change of heart about the president: “watching @potus more carefully recently has really changed my perspective on him (i wish i had done more of my own thinking” he said in part. “i’m not going to agree with him on everything, but i think he will be incredible for the country in many ways!”

On Thursday morning, Altman posted, responding to Musk: “just one more mean tweet and then maybe you’ll love yourself…”

The tit-for-tat between Musk and Altman is a sign of both the struggle within the tech community to curry favor with Trump and how the AI race is driving the push for tech dominance. If putting out new, consumer-friendly devices was once the way for a tech company to gain power, the struggle to create the most advanced form of AI has almost completely taken over.   

The situation also points to the tension of Musk’s role as both a top Trump adviser and one of the world’s most powerful — and combative — business moguls. Musk has his own interest in AI through the X, which debuted Grok, its rival to OpenAI’s ChatGPT, in November.

The simmering Altman-Musk feud goes back years, well before Musk’s emergence in the U.S. political scene and even before the recent explosion of artificial intelligence technology. Companies have rushed to invest in AI infrastructure and development, so much so that it has accounted for a significant part of recent U.S. economic growth. A Goldman Sachs paper published in June, well before the announcement of the Stargate project, projected that AI capital expenditure could top $1 trillion.

OpenAI had generally been considered the leader in AI development, though it faces major competition from other startups, as well as most major tech giants that are believed to have closed the gap. That competition has made securing investments and partnerships all the more important in large part because of the sizable hardware and energy needs required to hone the models at the core of advanced AI.

Store closures in the U.S. last year hit the highest level since the pandemic — and even more locations are expected to shutter this year, as shoppers’ dollars increasingly go to a few industry winners, according to an analysis by Coresight Research.

Major retailers, including Party City and Macy’s, closed 7,325 stores in 2024, according to the retail advisory group’s data. That’s the sharpest jump since retailers in the U.S. shuttered almost 10,000 stores in 2020, the year when the Covid pandemic began.

So far this year, closures continue to climb. Retailers have already announced 1,925 store closures so far in 2025 — and that was only as of Jan. 10. The five retailers that have announced the most closures this year are Party City, Big Lots, Walgreens Boots Alliance, 7-Eleven and Macy’s, respectively.

The retail advisory firm projects that retailers will close about 15,000 stores this year as some legacy brands shrink and file for bankruptcy protection, or liquidating companies shutter locations.

The striking numbers reflect the stark divide between retailers that are gaining market share and those that have lost ground. Amazon, Costco and Walmart have gotten bigger as shoppers seek value and convenience. On the other hand, some smaller chains and specialty retailers have struggled to keep doors open or been forced to downsize.

A spike in bankruptcies contributed to the high number of closures in 2024. According to Coresight’s data, there were 51 retail bankruptcies in 2024, up from 25 in 2023. Some of those, such as Party City, have most of their closures taking place in 2025.

Consumer spending has stayed strong — but a larger share of the dollars has gone to fewer retailers. Holiday sales increased 4% year over year to $994.1 billion for Nov. 1 through Dec. 31, according to the National Retail Federation, the industry’s major trade group. That total excludes auto dealers, gas stations and restaurants.

That’s about in line with pre-pandemic holiday spending, which rose an average of 3.6% from 2010 to 2019.

The number of jobs in the industry also did not appear to fall despite the closures. Employment in the retail trade “changed little” last year, after the industry added about 10,000 jobs per month in 2023, the Bureau of Labor Statistics said earlier this month.

Specialty retailers in particular have struggled: In December, The Container Store filed for bankruptcy protection. Big Lots’ new owner is in the middle of an effort to keep some stores open, after the discount retailer said in December that it would start going-out-of-business sales across all stores. Fabrics and craft retailer Joann filed for bankruptcy protection earlier this month for the second time in a year.

But it wasn’t just specialty stores. Last year, the highest number of closures came from Dollar Tree-owned Family Dollar, CVS Health, Conn’s, rue21 and Big Lots, respectively. Conn’s, a home goods and furniture retailer, and rue21, a teen apparel retailer, closed all stores after the parent company filed for bankruptcy protection in 2024.

John Mercer, Coresight’s head of global research, said competitive threats, not a decline in demand, is to blame.

“Demand may be strong among consumers, but where is some of that increased demand going? Where is it being channeled to?” he said.

Mercer said the retailers that are shuttering stores tend to fall in three categories: They are closing all locations as part of a liquidation, such as Party City; shutting down many of their stores after a Chapter 11 bankruptcy filing, such as The Container Store; or trimming back their footprint as they adapt to fast-changing consumer preferences, such as drugstores Walgreens and CVS and legacy department store Macy’s.

Macy’s, for example, is in the middle of closing about 150 of its namesake stores across the country by early 2027. The department store operator has been shuttering roughly 50 of those per year, since it made the announcement in early 2024. It is opening a limited number of shops that are smaller, off-mall versions of its namesake stores and new locations of its better-performing brands, Bloomingdale’s and beauty chain Bluemercury.

Some newcomers are chipping away at legacy retailers’ sales, Mercer said. Coresight estimates that Chinese e-commerce companies Shein and Temu pulled in a combined roughly $100 billion in sales last year, with the majority of that coming from outside of the U.S.

For example, more Americans are turning to sites like Temu for party balloons and storage tubs, which may have contributed to the bankruptcy filings of Party City and The Container Store last year, he said.

Even a small percentage drop in sales can be a blow to retailers’ stores, which come with high fixed costs like leases and labor, Mercer said.

Some unique factors have widened the gap between store openings and closures, according to David Silverman, a retail analyst at Fitch Ratings. When a major mall anchor like Macy’s closes, he said that can lead smaller retailers to exit, as well. As some stores in mall or strip shopping centers shutter, they’re also getting replaced by fitness studios, urgent care clinics or apartments instead of another retail store.

He added that population shifts during the Covid pandemic changed retailers’ store traffic patterns and shook up where they may want to be located.

“Most companies are not adding a significant number of square footage and even the ones that until recently were adding a lot, like the dollar stores, are rethinking their footprints,” he said.

Silverman said he expects more stores will continue to close than open in the U.S., as retailers’ growth comes from online sales and as larger companies take a bigger share of the market. Some of those, such as Walmart, add a lot more volume with one store than specialty retailers get from the dozens of locations they close, he added.

Investors will soon get an update on which retailers are outperforming and underperforming. Most major retailers will deliver their holiday-quarter results starting in mid-February.

Some retailers, including Kohl’s and Macy’s, announced their own plans for store closures before they shared full quarterly results. Kohl’s said earlier this month that it will close 27 underperforming stores by April, along with shuttering an e-commerce fulfillment center in San Bernardino, California, in May.

There’s some hopeful news for the retail industry, however: Store openings also accelerated last year in the U.S. to 5,970 — the highest number since Coresight began tracking store openings and closures in 2012. The firm anticipates that will stay about flat in 2025, with an estimated 5,800 stores opening.

Last year, Dollar General, Dollar Tree, 7-Eleven, Mexican convenience store Oxxo and Five Below tallied the most store openings.

So far this year, the top five retailers in terms of announced store openings in the U.S. are Aldi, JD Sports, Burlington Stores, Pandora and Barnes & Noble, respectively.

UnitedHealthcare on Thursday tapped company veteran Tim Noel as its new CEO following the targeted killing of its former top executive, Brian Thompson, in Manhattan in December. 

Noel was the head of Medicare and retirement at UnitedHealthcare, the largest private health insurer in the U.S. It is the insurance arm of UnitedHealth Group, the nation’s biggest health-care conglomerate based on revenue and its more than $480 billion market cap. 

Noel, who first joined the company in 2007, “brings unparalleled experience to this role with a proven track record and strong commitment to improving how health care works for consumers, physicians, employers, governments and our other partners,” UnitedHealth Group said in a statement.

The company is still reeling from the murder of Thompson, which unleashed a torrent of pent-up anger and resentment toward the insurance industry, renewed calls for reform and reignited a debate over health care in the U.S.

Amid concerns about physical safety, companies across the industry have beefed up security for their executives and removed their photos and much of their personal information from their websites. That includes UnitedHealth Group, which appears to no longer have an executive leadership page.

Luigi Mangione, who was charged in the deadly shooting, is currently being held without bond in Brooklyn, New York. Mangione, 26, faces charges including murder and terrorism, to which he has pleaded not guilty.

Noel oversaw a part of UnitedHealthcare’s business that includes Medicare Advantage plans, which have been the source of skyrocketing costs for insurers. 

Medicare Advantage, a privately run health insurance plan contracted by Medicare, has long been a key source of growth and profits for the insurance industry. But medical costs from Medicare Advantage patients have jumped over the last year as more seniors return to hospitals to undergo procedures they had delayed during the Covid-19 pandemic. 

UnitedHealthcare’s Medicare and retirement unit serves one-fifth of Medicare beneficiaries, or nearly 13.7 million patients, according to a fact sheet from the company. 

UnitedHealth Group CEO Andrew Witty said on an earnings call last week that the profit-driven U.S. healthcare system “needs to function better” and be “less confusing, less complex and less costly.”

Witty said members of the system benefit from high prices, noting that lower prices and improved services can be good for customers and patients but can “threaten revenue streams for organizations that depend on charging more for care.” However, Witty did not address to what extent UnitedHealth Group benefits from that model. 

In its first quarterly results since the killing, UnitedHealth Group reported fourth-quarter revenue that missed Wall Street’s expectations due to weakness in its insurance business.

The company’s 2024 revenue rose 8% to $400.3 billion, and it expects revenue to climb again this year to a range of $450 billion to $455 billion.

— CNBC’s Bertha Coombs contributed to this report