US stock market movers on June 26 showed sharp rotation as streaming, AI analytics and healthcare software names gained, while semiconductor, AI-infrastructure and biotech-linked stocks faced heavy selling.

Key Highlights • fuboTV surged 22.50% as streaming M&A speculation and post-merger scale hopes lifted the stock. • FactSet jumped 10.97% after launching an AI-focused Portfolio Analytics MCP product ahead of earnings. • Veeva Systems rose 8.40% as investors rotated into healthcare software and AI-linked life-sciences tools. • ON Semiconductor, Maase, Omeros and Bloom Energy led the downside on deal risk, regulatory setbacks and AI valuation pressure.

Market Overview

US equities saw sharp single-stock volatility on June 26, 2026, with major movers spread across streaming, financial data, healthcare software, semiconductors, biotech, clean energy and AI infrastructure. The session was driven less by broad index direction and more by company-specific catalysts.

On the upside, investors rewarded companies with clearer growth or AI-product narratives. fuboTV rallied on renewed streaming consolidation speculation, FactSet gained after an AI product launch, and Veeva advanced as healthcare software demand remained resilient. On the downside, ON Semiconductor sold off after a major all-stock acquisition announcement, Maase reversed as AI-robotics enthusiasm cooled, Omeros dropped on a negative European regulatory opinion, and Bloom Energy fell as AI-infrastructure valuation concerns intensified.

Top Gainers

fuboTV Surges on Streaming M&A Speculation

fuboTV Inc. (NYSE:FUBO) rose 22.50% to close at $9.91, rebounding sharply after recently touching a fresh 52-week low. The move was supported by renewed speculation around streaming mergers and acquisitions after Roku completed its acquisition of Frndly TV.

Investors also focused on fuboTV’s larger post-merger profile following its combination with Hulu + Live TV. The deal gives the company greater scale, a broader subscriber base and a stronger profitability narrative. The rally suggested investors were reassessing fuboTV as a possible beneficiary of consolidation across connected TV and streaming.

FactSet Jumps After AI Product Launch

FactSet Research Systems Inc. (NYSE:FDS) climbed 10.97% to close at $231.74. The move came ahead of the company’s July 1 fiscal third-quarter earnings report and followed the launch of Portfolio Analytics MCP.

The new product extends FactSet’s performance and risk analytics into conversational and agentic AI workflows. That gave investors a fresh reason to focus on the company’s AI strategy, especially as financial-data providers compete to embed AI into research, portfolio construction and risk-management tools.

Veeva Gains on Healthcare Software and AI Momentum

Veeva Systems Inc. (NYSE:VEEV) advanced 8.40% to close at $171.36. The stock benefited from rotation into healthcare software and AI-linked life-sciences technology.

Investor attention remained on Veeva’s raised fiscal 2027 outlook and its Copli acquisition, now rebranded as Veeva Falcon ML. The tool is designed to reduce manual medical, legal and regulatory review work, giving the company a clearer AI-use case inside the life-sciences sector.

Other Notable Gainers

• Globallink Investment (NASDAQ:GLLI) surged 69.85% to $8.00.

• LiveWire Group (NYSE:LVWR) jumped 36.63% to $1.38.

• Cable One (NYSE:CABO) climbed 30.06% to $52.87.

• Pyxis Oncology (NASDAQ:PYXS) rose 24.22% to $2.77.

Top Losers

Maase Slides as AI-Robotics Rally Reverses

Maase Inc. (NASDAQ:MAAS) fell 26.82% to close at $12.77, leading the major decliners. The stock gave back part of its recent surge as investors reassessed the company’s pivot toward AI computing, mobile charging robots and smart hardware.

The sell-off reflected concerns around weak legacy financials, discontinued businesses, net losses and reduced cash reserves. The move showed how quickly speculative AI-linked rallies can reverse when investors shift focus from story-driven momentum back to balance-sheet quality and execution risk.

ON Semiconductor Drops After Synaptics Deal

ON Semiconductor Corporation (NASDAQ:ON) plunged 23.66% to close at $90.65 after announcing an all-stock acquisition of Synaptics valued at roughly $7 billion.

Under the deal structure, Synaptics shareholders would receive ON Semiconductor shares, raising investor concerns around dilution, valuation and integration risk. The market reaction suggested investors were not convinced that the strategic benefits outweighed near-term financial and execution uncertainty, especially during broader pressure across semiconductor stocks.

Omeros Falls After Negative European Opinion

Omeros Corporation (NASDAQ:OMER) dropped 19.12% to close at $8.67 after the European Medicines Agency’s CHMP issued a negative opinion on narsoplimab for TA-TMA.

The regulatory setback raised uncertainty around the company’s European commercialization path. Omeros said it plans to request re-examination and seek an independent review, but investors focused on the immediate delay risk and the weaker near-term outlook for approval in Europe.

Bloom Energy Hit by AI Infrastructure Valuation Reset

Bloom Energy Corporation (NYSE:BE) fell 18.49% to close at $52.02 as investors reassessed high-momentum AI infrastructure names. The stock had rallied sharply before the decline, leaving it vulnerable to profit-taking and valuation pressure.

The sell-off was tied to concerns around AI infrastructure spending, rising component costs and broader pressure on richly valued power and data-center-linked stocks. The move showed that investors remain interested in AI infrastructure, but are becoming more selective after large share-price gains.

Analog Devices and Keysight Slide With Semiconductor Weakness

Analog Devices Inc. (NASDAQ:ADI) declined 7.42% to close at $386.91, while Keysight Technologies Inc. (NYSE:KEYS) fell 8.72% to $328.66. Both stocks were caught in broader semiconductor and AI-linked hardware weakness.

The pressure reflected concerns around stretched valuations, memory-cost inflation and the durability of AI infrastructure demand. Keysight’s decline also showed that the sell-off extended beyond chipmakers into testing and measurement names exposed to technology capital spending.

Other Notable Losers

• WidePoint (NYSEAMERICAN:WYY) declined 17.22% to $16.72.

• TUTHURA Biosciences (NASDAQ:TUTH) slipped 16.60% to $2.95.

Why the Session Matters

The June 26 session showed that investors are still rewarding AI and software stories, but only when the catalyst appears tied to clear products, enterprise demand or operating scale. FactSet and Veeva gained because their AI exposure was linked to defined workflow tools, while fuboTV rallied on consolidation hopes in streaming.

The losers showed the other side of the same market. Maase and Bloom Energy were pressured as investors questioned speculative AI-linked valuations. ON Semiconductor fell because the Synaptics acquisition raised dilution and integration concerns. Omeros dropped because a regulatory setback changed the near-term approval outlook.

For market watchers, the session was a reminder that large percentage moves need to be judged by catalyst quality. Some moves were tied to confirmed corporate events, including ON Semiconductor’s deal and Omeros’ regulatory update. Others reflected positioning, valuation resets and changing risk appetite across AI-linked stocks.