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Jul 03

Top 10 Largest Merger & Acquisition Deals – June 2025

  • July 3, 2025
  • Merger & Acquisition ( M&A)

By June end, global M&A deal value hit $2.14 trillion, up 26% YoY, driven largely by megadeals over $10 billion, a 62% increase. Below are the top 10 largest M&A deals announced in the month, based on an analysis of the Intellizence Mergers & Acquisitions Dataset.   

The Los Angeles Lakers sold for $10 billion to  Guggenheim Partners CEO Mark Walter 

Transaction Value: $10 billion

Industry: Sports

The Buss family has agreed to sell a controlling interest in the Los Angeles Lakers to Mark Walter, the current owner of the L.A. Dodgers. He is currently the Chief Executive Officer of Guggenheim Partners and will assume majority ownership of the iconic franchise upon the deal’s finalization. Current owner Jeanie Buss will continue to represent the team in league matters. If it goes through, this will be the largest sale of a sports team in history. The previous was last year’s $6.1 billion sale of the Lakers’ rival, the Boston Celtics.

Brown & Brown acquires Accession Risk Management

Transaction Value: $9.8 billion

Industry: Insurance

Brown & Brown has acquired Accession Risk Management, the parent company of specialty brokerage firm Risk Strategies and wholesaler One80 Intermediaries, for about $9.8 billion. After the close of the transaction, expected in the third quarter, the Risk Strategies team will become part of Brown & Brown’s retail segment. Accession CEO John Mina will join the retail senior leadership team.

Sanofi to expand immunology offerings with Blueprint Medicines

Transaction Value: $9.1 billion

Industry: Energy & Utilities

Sanofi will acquire Blueprint Medicines, expanding its portfolio in rare immunological diseases and adding an early-stage pipeline in the field of immunology. Blueprint Medicines Corporation (Blueprint) is a U.S.-based, publicly traded biopharmaceutical company specializing in systemic mastocytosis (SM), a rare immunological disease, as well as other KIT-driven diseases. Under the terms of the acquisition, Sanofi will pay an equity value of approximately $9.1 billion.

Lone Star to sell Portugal’s Novo Banco to French BPCE

Transaction Value: $8.14 billion

Industry: Retail

U.S. private equity fund Lone Star plans to sell its 75% stake in Novo Banco to French banking group BPCE. The deal would value Portugal’s fourth-largest lender at around 7 billion euros ($8.14 billion). BPCE will support Novobanco’s growth into a leading financial institution in Portugal, serving individuals, SMEs, and large corporates across the country.

Digital Global Systems acquired by Casa del Fuego Family Office and Trust 

Transaction Value: $5 Billion

Industry: Technology

Digital Global Systems (DGS), the leader in patented spectrum optimization technologies and AI-driven spectrum management, has been acquired by Casa del Fuego Family Office and Trust for $5 billion. DGS will continue to operate independently as a wholly owned subsidiary following the acquisition. DGS is widely recognized for its pioneering role in applying artificial intelligence and machine learning to real-time RF data. The company holds the largest and most advanced patent portfolio globally for AI-based spectrum management.

Diamondback’s Viper Energy buys Sitio Royalties for $4.1 billion

Transaction Value: $4.1 Billion

Industry: Energy & Utilities

Viper Energy, a subsidiary of Diamondback Energy, will acquire Sitio Royalties in an all-equity transaction valued at approximately $4.1 billion. Sitio is a pure-play mineral and royalty company that acquires quality oil and gas mineral and royalty interests in productive U.S. basins. The transaction has received unanimous approval from the Board of Directors of both companies.

Keyera to acquire Plains’ Canadian NGL business

Transaction Value: C$5.15 Billion (USD$3.77 Billion)

Industry: Energy

Keyera will acquire all of Plains’ Canadian NGL business, as well as select U.S. assets, for a total cash consideration of C$5.15 billion. The buyout will expand Keyera’s liquids infrastructure platform across western and eastern Canada. This comes at a time when the U.S. has imposed tariffs on Canadian goods, with a 10% levy on energy imports, which include oil, natural gas, electricity, coal, uranium, and critical minerals. This acquisition will reduce dependence on the U.S. by expanding opportunities within the country or in other markets.

Ascension Health Expands Reach With $3.9 Billion AmSurg Deal

Transaction Value: $3.9 Billion

Industry: Biotechnology

 Ascension, one of the leading Catholic and non-profit health systems, is expanding its care delivery network through an agreement to acquire AMSURG. This strategic acquisition will add more than 250 ambulatory surgery centers across 34 states to Ascension’s network. AMSURG is recognized as a national leader in the development, management, and operation of ambulatory surgery centers.  

Allison Transmission acquires Dana’s Off-Highway Business

Transaction Value: $2.7 Billion

Industry: Automobile

Allison Transmission Holdings will acquire Dana Incorporated’s Off-Highway business for approximately $2.7 billion. This acquisition will help Allison expand its footprint in emerging markets, enhance core technologies, deliver strong financial results, and offer a broader range of commercial-duty powertrain and industrial solutions.

New Zealand’s Xero to buy US fintech Melio for $2.5 billion

Transaction Value: $2.5 Billion

Industry: Accounting, Audit & Tax

Xero has agreed to buy Melio Payments for $2.5 billion. This is by far the New Zealand-based company’s largest acquisition to date. The combined business is expected to accelerate US revenue growth, more than doubling Xero’s group revenue by 2028.

Want to keep track of the largest Mergers & Acquisitions (M&A) deals in 2024? Check out The Intellizence Mergers & Acquisitions (M&A) Deals. 

Check out last week’s five biggest M&A deals.

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