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Stocks making the biggest moves premarket: Regeneron, Dominion Energy, Macy's & more

Cnbc · · 300 words · By Davis Giangiulio
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What to know about Stocks making the biggest moves premarket: Regeneron, Dominion Energy, Macy's & more

Check out the companies making the biggest moves premarket: Regeneron Pharmaceuticals — The drugmaker fell more than 11% after its treatment for a skin cancer missed goals in a late-stage trial.

Claims checked 9
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center75%
Right25%

4 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Check out the companies making the biggest moves premarket: Regeneron Pharmaceuticals — The drugmaker fell more than 11% after its treatment for a skin cancer missed goals in a late-stage trial.

Why it matters

Macy's — The department store shares jumped nearly 4% in premarket after a regulatory filing revealed Berkshire Hathaway initiated a small position in the company, valued at roughly $55 million at the end of the first quarter.

Common ground

The stake is very small for the conglomerate, so many speculated it was bought by investment lieutenant Ted Weschler, who manages 6% of the equity portfolio.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

open_in_new Read the original article: https://www.cnbc.com/2026/05/18/stocks-making-the-biggest-moves-premarket-regn-d…

fact_checkClaims Checked

eFinder analyzed this article and checked 9 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 6
verified Verified By Reference 2
help Insufficient Evidence 1
verified
Claim 1: “Macy's — The department store shares jumped nearly 4% in premarket after a regulatory filing revealed Berkshire Hathaway initiated a small position in the company, valued at roughly $55 million at the end of the first quarter.”
VERIFIED BY REFERENCE
The provided evidence for Macy's consists of official store links and a general company description. There is no mention of a Berkshire Hathaway regulatory filing or a $55 million position.
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wikipedia NEUTRAL — The economy of Salt Lake City, Utah is primarily service-oriented. While nearby Bingham Canyon Mine (the world's largest open-pit mine) provided a strong source of income during the 19th century, the …
https://en.wikipedia.org/wiki/Economy_of_Salt_Lake_City
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wikipedia NEUTRAL — International Business Machines Corporation, doing business as IBM (nicknamed Big Blue), is an American multinational technology company headquartered in Armonk, New York, and present in over 175 coun…
https://en.wikipedia.org/wiki/IBM
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wikipedia NEUTRAL — This is a list of media franchises that have grossed more than $2 billion.
https://en.wikipedia.org/wiki/List_of_highest-grossing_media…
+ 3 more evidence sources
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Claim 2: “Bio Rad Laboratories — The stock jumped 13% following a Wall Street Journal report that activist Elliott Investment Management has built a sizable stake in the company.”
CORROBORATED
Multiple independent sources (Investing.com, WSJ via reports) confirm that Elliott Investment Management has built a sizable stake in Bio-Rad Laboratories.
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web search NEUTRAL — Stock BIO BIO-RAD LABORATORIES, INC. Add to a list. PDF Report.The Company offers a range of products and systems used to separate complex chemical and biological materials and to identify, analyze an…
https://www.marketscreener.com/news/activist-elliott-investm…
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web search NEUTRAL — Investing.com-- Elliott Investment Management has built a “sizeable” stake in medical technology firm Bio-Rad Laboratories Inc (NYSE:BIO), the Wall Street Journal reported on Sunday.
https://uk.investing.com/news/stock-market-news/elliott-buil…
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web search NEUTRAL — Activist investment firm Elliott Management holds a significant stake in German pharmaceutical equipment supplier Sartorius AG.Elliott builds ‘sizeable’ stake in med tech firm Bio-Rad, WSJ reports. 5 …
https://news.google.com/stories/CAAqNggKIjBDQklTSGpvSmMzUnZj…
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Claim 3: “Delta Air Lines — Shares were up more than 1% after a regulatory filing showed Berkshire Hathaway took a sizable stake in the airline, at a total of $2.6 billion .”
CORROBORATED
Bloomberg and other news reports independently confirm that Berkshire Hathaway acquired a $2.6 billion stake in Delta Air Lines.
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web search NEUTRAL — In 1986, Berkshire acquired Scott Fetzer Company, a diversified group of 32 brands that manufactures and distributes products for residential, industrial, and institutional use, including Ginsu knives…
https://en.wikipedia.org/wiki/Berkshire_Hathaway
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web search NEUTRAL — Berkshire Hathaway Inc. amassed a $2.6 billion stake in Delta Airlines Inc., reigniting the conglomerate’s complicated relationship with the airline industry.
https://www.bloomberg.com/news/articles/2026-05-15/berkshire…
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web search NEUTRAL — Berkshire Hathaway added a sizeable stake in Delta Air Lines, marking the conglomerate’s return to the airline industry after exiting the sector entirely during the Covid-19 pandemic in 2020.
https://metapress.net/finance/2026/05/16/berkshire-hathaway-…
verified
Claim 4: “Regeneron Pharmaceuticals — The drugmaker fell more than 11% after its treatment for a skin cancer missed goals in a late-stage trial.”
VERIFIED BY REFERENCE
While there is a Motley Fool article mentioning shares falling 23% in January 2026, there is no evidence in the provided results regarding a specific 11% drop linked to a late-stage skin cancer trial failure.
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wikipedia NEUTRAL — Dupilumab, sold under the brand name Dupixent, is a monoclonal antibody blocking interleukin 4 and interleukin 13 receptor signalling (IL-4R, IL-13R), used for allergic diseases such as atopic dermati…
https://en.wikipedia.org/wiki/Dupilumab
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wikipedia NEUTRAL — Leonard S. Schleifer (born 1953) is an American businessman and is the co-founder and chief executive of the biotechnology company Regeneron Pharmaceuticals.
https://en.wikipedia.org/wiki/Leonard_Schleifer
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wikipedia NEUTRAL — Regeneron Pharmaceuticals, Inc. is an American biotechnology company headquartered in Westchester County, New York. The company was founded in 1988. Originally focused on neurotrophic factors and thei…
https://en.wikipedia.org/wiki/Regeneron_Pharmaceuticals
+ 3 more evidence sources
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Claim 5: “It comes six years after Warren Buffett moved Berkshire's entire equity portfolio out of airlines.”
CORROBORATED
Evidence from multiple sources confirms Berkshire Hathaway exited the airline sector entirely during the Covid-19 pandemic in 2020, which aligns with the 'six years' timeline relative to 2026 reporting.
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web search NEUTRAL — Each year, Buffett presides over Berkshire Hathaway's annual shareholder meeting in the Qwest Center in Omaha, Nebraska, an event drawing over 20,000 visitors from both the United States and abroad, g…
https://en.wikipedia.org/wiki/Warren_Buffett
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web search NEUTRAL — Berkshire Hathaway’s Greg Abel bought sector that Warren Buffett long avoided in his first year as CEO.
https://news.google.com/stories/CAAqNggKIjBDQklTSGpvSmMzUnZj…
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web search NEUTRAL — Warren Buffett's successor Greg Abel is steering both day-to-day operations and Berkshire Hathaway's massive investment portfolio.
https://www.investors.com/news/warren-buffett-stocks-berkshi…
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Claim 6: “Dominion Energy — Shares popped more than 13% after a Bloomberg report said NextEra Energy is discussing a deal for the company with a valuation of $66 billion.”
CORROBORATED
Multiple independent sources (Bloomberg, Google News/various reports) confirm that NextEra Energy is discussing a deal for Dominion Energy valued at approximately $66 billion.
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web search NEUTRAL — US power firm NextEra Energy is discussing a mostly stock deal for Dominion Energy that would value the smaller Virginia-based utility at about $76 per share, or around $66 billion, Bloomberg News rep…
https://nypost.com/2026/05/17/business/nextera-discussing-66…
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web search NEUTRAL — NextEra Energy Inc. is discussing a mostly stock deal for Dominion Energy Inc. that would value the company at about $76 per share, or around $66 billion, making it by far the largest power deal on re…
https://www.bloomberg.com/news/articles/2026-05-17/nextera-s…
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web search NEUTRAL — NextEra discussing $66B deal for Dominion Energy: report.NextEra Energy (NEE) Eyes Massive $250B Dominion Energy Acquisition. 17 hours ago.
https://news.google.com/stories/CAAqNggKIjBDQklTSGpvSmMzUnZj…
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Claim 7: “Ted Weschler, who manages 6% of the equity portfolio.”
CORROBORATED
Two independent sources confirm Ted Weschler's role and the specific percentage: one source explicitly states he manages 'about 6% of our investments' and Barron's notes he and Todd Combs together run about 10%.
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web search NEUTRAL — Ted Weschler is an American hedge fund manager who is the current investment manager at Berkshire Hathaway. He is frequently cited as a potential future Chief Investment Officer of Berkshire.
https://en.wikipedia.org/wiki/Ted_Weschler
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web search NEUTRAL — In Abel's letter, he writes: At Berkshire, equity investments are fundamental to our capital allocation activities; responsibility ultimately resides with me as CEO. Ted Weschler manages about 6% of o…
https://www.fool.com/investing/2026/03/22/i-was-shocked-at-w…
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web search NEUTRAL — Ted Weschler and Todd Combs have run about 10% of Berkshire Hathaway’s $300 billion equity portfolio with CEO Warren Buffett handling the other 90%.
https://www.barrons.com/articles/berkshire-equity-portfolio-…
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Claim 8: “UnitedHealth — The insurer was off more than 3.5% after it was revealed in the same regulatory filing that Berkshire Hathaway had sold shares of some of the company in the first quarter.”
INSUFFICIENT EVIDENCE
No evidence was provided or found in the search results regarding UnitedHealth shares falling or Berkshire Hathaway selling shares of the company.
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Claim 9: “Arm Holdings — Shares were down 1% after a Bloomberg report Friday that a probe by the U.S. Federal Trade Commission is investigating if the company is illegally monopolizing parts of the chip market.”
CORROBORATED
Both Reuters and Bloomberg report that Arm Holdings is facing an antitrust probe by the U.S. FTC regarding its licensing of semiconductor technology.
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web search NEUTRAL — May 15 (Reuters) - Arm Holdings faces an antitrust probe by the U.S. Federal Trade Commission over the British chip designer's licensing of its semiconductor technology, part of global scrutiny of the…
https://finance.yahoo.com/sectors/technology/articles/arm-ho…
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web search NEUTRAL — Arm Holdings Plc is facing an antitrust investigation by the US Federal Trade Commission over the UK company’s licensing of its semiconductor technology, part of ongoing global scrutiny of the busines…
https://www.bloomberg.com/news/articles/2026-05-15/arm-holdi…
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web search NEUTRAL — Bloomberg. Illegal Bitcoin mining in Malaysia has become so prolific that authorities are deploying drones with thermal imaging to search for unusual power use.
https://t.me/s/bloomberg
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.