May 19 2025 |
Mergers and acquisitions (M&A) are business transactions in which companies combine operations or one company purchases another to achieve strategic goals, such as expanding into new markets, gaining competitive advantages, or acquiring new capabilities. Examining real-world mergers and acquisitions examples can help businesses and leaders understand what drives successful deals and why others fall short.
From strategic alignment and thorough due diligence to regulatory considerations and post-merger integration, the examples in this article highlight the key factors that can influence M&A outcomes. Explore famous deals, learn the lessons behind their successes and failures, and how businesses can apply these insights to future transactions.
These famous mergers and acquisitions examples include some of the biggest M&A success stories of all time.
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Famous mergers & acquisitions examples
ExxonMobil and Pioneer Natural Resources, $59.5 billion (2024)
In an all-stock transaction that closed in May 2024, ExxonMobil acquired Pioneer Natural Resources. The acquisition valued Pioneer at around $64.5 billion, including debt, and would significantly expand ExxonMobil’s presence in the Permian Basin, enhancing its oil production capabilities. The deal was received with a mixed response in the market, with analysts expressing some concerns about the valuation. The merger presents opportunities for enhanced environmental stewardship and accelerated emissions reduction, with ExxonMobil accelerating Pioneer’s Scope 1 and 2 emissions goals from 2050 to 2035.
Key takeaway:
An ESG deal can transfer responsibility for net-zero commitments to ensure resourcing and capability to achieve environmental outcomes.
Broadcom and VMWare, $69 billion (2023)
Broadcom (the continuing company from the 2016 Avago Technologies and Broadcom merger) acquired VMWare for $69 billion in a cash and stock transaction. Continuing as VMWare, Broadcom expands its offering with enterprise software focusing on multi-cloud services for apps and virtualization technology, building on its existing semiconductor and connectivity chip capabilities to address complex technological requirements.
Key takeaway
A smart acquisition of complementary technology can power up a company to advance its services and meet ever-changing customer demands in competitive markets.
Microsoft and Activision Blizzard, $75.4B (2023)
In October 2023, Microsoft completed an all-cash transaction at $95 per share to buy Activision Blizzard , gaining ownership of popular franchises including Call of Duty, Warcraft, Diablo, Overwatch and Candy Crush. This cross-border deal came under regulatory scrutiny in both the US and the UK , with Microsoft restructuring the deal to meet regulator requirements. The US Federal Trade Commission moved to block the deal but acquiesced after a Federal Judge ruled in favor of the acquisition.
Key takeaway:
Engaging with regulators and maintaining transparency is key in cross-border acquisitions.
S&P Global and IHS Markit, $44 billion (2022)
In a deal that closed on 28 February 2022 following 2 years of negotiation, S&P Global purchased IHS Markit in a definitive all-stock deal for around $44 billion. Before the transaction could be completed, IHS Markit sold Base Chemicals to NewsCorp to alleviate concerns about fair competition.
Key takeaway:
Divestiture may be required before a merger is allowed to ensure compliance with merger laws .
Pfizer and Seagen, $43 billion (2023)
In the largest transaction in the biopharma industry since 2019, Pfizer acquired Seagen, an antibody drug conjugate specialist, adding four FDA-approved cancer drugs to its list. To close the deal, Pfizer agreed to donate royalties on its US sales of bladder cancer drug Bavencio to the American Association for Cancer Research (AACR).
Key takeaway:
Environmental, social and governance (ESG) attributes are essential for buyers as well as sellers in modern deal-making, and may make the difference between losing a deal and closing a deal.
CVS Health and Aetna, $78 billion (2018)
This vertical merger combined CVS’s retail pharmacy network with Aetna’s health insurance portfolio in the US to simplify healthcare, with a stock and cash transaction. Critics raised anti-trust concerns, however, the transaction was approved by the Department of Justice. The first full year following the merger exceeded expectations, demonstrating successful post-merger integration .
Key takeaway:
Preparing for post-merger integration is key to realizing the potential of M&A .
Walt Disney and 20th Century Fox, $71.3 billion (2019)
Disney acquired 20th Century Fox in one of the biggest media mergers ever. The deal would expand Disney’s global presence even further, diversifying content on streaming service Disney+ and adding new franchises like X-Men, Avatar, and The Simpsons. Fox’s news and sports businesses were spun off into a newly formed Fox Corporation. Following the acquisition, layoffs and the closing of operations impacted staff morale and culture. In 2023, plans to cut costs by $5.5 billion and eliminate 7,000 jobs have raised questions about the financial sense of the deal.
Key takeaway:
During the due diligence process , financial modeling should account for a variety of outcomes to identify potential risks and synergies.
AB InBev and SABMiller, $100 billion (2016)
In a long-awaited deal and reportedly the third-largest acquisition in history (largest ever in Britain), AB InBev acquired SABMiller. Combining two of the world’s leading beer companies, the merged company Newbelco divested key brands to comply with anti-trust law. While AB InBev achieved rapid initial cost savings, growth following the merger did not meet expectations, leaving the company with a large debt burden.
Key takeaway:
Following complex merger negotiations and court settlements, once combined the new company divested key brands to meet regulator concerns about maintaining fair competition.
Vodafone and Mannesmann, $190 billion (2000)
On February 4, 2000, Vodafone AirTouch PLC acquired Mannesmann AG for more than US $190 billion, in a deal that reshaped the mobile telecom marketplace. At the time, the cross-border transaction was the largest merger in history. Vodafone Airtouch PLC engaged Goldman Sachs, which created the world’s largest telecom provider, as a financial advisor throughout the transaction. The M&A deal was also unique as the first unsolicited cross-border acquisition of a German company.
Key takeaway:
Seek expert financial advice from an industry leader to confidently execute complex acquisitions.
Exxon and Mobil, $80 billion (1998)
Exxon Corp. and Mobil Corp. - the first and second largest oil producers in the United States announced their merger in 1998, closing the deal in just 282 days. The megadeal closed at $80 billion, with investors quite literally quadrupling their money in the process. Both brands continued to exist, with no noticeable change for motorists.
Key takeaway:
Horizontal mergers can benefit investors with a better return on capital, without disrupting consumers.
Famous mergers and acquisitions: an example that failed
11. AOL and Time Warner, $182 billion (2000)
America Online Inc. (AOL) acquired Time Warner Inc. for some $182 billion in stock and debt. The result was a $350 billion mega-corporation, AOL Time Warner. However, within a few months, a recession hit, the dot-com bubble burst, and the AOL-Time Warner deal was dubbed “the worst merger in history .”
Key takeaway:
Sometimes even the experts don’t predict the pace of new technology adoption, resulting in an investment that doesn’t pay off.
3 successful mergers and acquisitions examples
Disney and Pixar (2006) & Disney and Marvel (2009)
Mass media conglomerate Disney found enormous success with two very famous acquisitions; first, of animation heavyweight Pixar, then Marvel Entertainment. Through both of these acquisitions, Disney focused on keeping the elements that made the acquisitions a success intact — including the company culture. Walt Disney Co. acquired Pixar in 2006 for $7.4 billion and has since seen tremendous success with films like WALL-E, Finding Dory and Toy Story 3 – each of which has generated billions of dollars in revenue for the company. One of the main reasons for the success of this acquisition was the access it gave Disney to Pixar’s advanced animation technology. By keeping Pixar’s culture distinct, Disney was able to generate significant value without destroying what made Pixar unique or successful. Shortly after, Disney acquired Marvel Entertainment, paying $4 billion for the entertainment company in 2009. With a highly lucrative string of Marvel films premiering at the box office since then, they have already made their money back – with more to come, no doubt.
Google and Android, approx. $50 million (2005)
In 2005, Google purchased the relatively unknown Android, a mobile startup that had been founded only a few years prior. While the exact sum is undisclosed, it’s estimated that the deal was worth approximately $50 million - a fraction of the $130 million Google spent on acquisitions that year. Google spent $1.65 billion purchasing YouTube just over a year later. Android gave Google the mobile operating system (OS) it needed to compete with the likes of Apple and Microsoft in the growing mobile market and expand its reach far beyond desktops. Android has easily been Google’s most successful acquisition; when it comes to smartphones, their estimated market share is a whopping 85% (IDC). Be inspired: Smaller M&A deals create more long-term value
Famous mergers and acquisitions: An example that failed
AOL and Time Warner, $182 billion (2000)
America Online Inc. (AOL) acquired Time Warner Inc. for some $182 billion in stock and debt. The result was a $350 billion mega-corporation, AOL Time Warner. However, within a few months, a recession hit, the dot-com bubble burst, and the AOL-Time Warner deal was dubbed “the worst merger in history .”
Key takeaway:
Sometimes even the experts don’t predict the pace of new technology adoption, resulting in an investment that doesn’t pay off.
Google and Android, approx. $50 million (2005)
In 2005, Google purchased the relatively unknown Android, a mobile startup that had been founded only a few years prior. While the exact sum is undisclosed, it’s estimated that the deal was worth approximately $50 million - a fraction of the $130 million Google spent on acquisitions that year. Google spent $1.65 billion purchasing YouTube just over a year later. Android gave Google the mobile operating system (OS) it needed to compete with the likes of Apple and Microsoft in the growing mobile market and expand its reach far beyond desktops. Android has easily been Google’s most successful acquisition; when it comes to smartphones, their estimated market share is a whopping 85% (IDC). Be inspired: Smaller M&A deals create more long-term value
Successful mergers and acquisitions with Ansarada
With an unparalleled understanding of the requirements of modern deals, Ansarada provides software that keeps everything in one secure location, allowing you to concentrate on the finer details of the merger or acquisition process . Here are just two examples out of the many deals we’ve helped to facilitate:
PBL Media Ltd
In 2006, an Ansarada Data Room was used to facilitate the $5 billion recapitalization of James Packer’s company, PBL Media Limited. The deal saw the media giant sell half of its media assets, including the Nine television network, to private equity investors. The move allowed the company to ‘bankroll its ambitions in gaming and capitalize on the federal government’s changes to media ownership laws’ (Australian Financial Review ).
Westpac and St. George
In early 2008, Westpac and St. George banks outlined their intention to merge, and the deal was approved by shareholders and the Australian Federal Court in November of the same year. The combined entity was valued at over $66 billion in the megamerger executed in Ansarada’s Virtual Data Room. For more mergers and acquisitions examples, check out our Ansarada customer success stories page where you can read stories of successful M&A transactions that have been closed with confidence using Ansarada’s AI-powered platform.
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“I've been doing deals with Ansarada now for going on 12 years,” said Alex Jordan, Partner at Deloitte. “From the first deal I'd ever done; being able to have that visibility, see what bidders are doing and share information very seamlessly and securely – it’s amazing how something so simple can change your life, just in terms of being able to manage the process.”
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Frequently asked questions about mergers and acquisitions
What is an example of a merger?
The merger of Exxon and Mobil in 1999 is a well-known example of a merger between two major companies in the same industry. The transaction combined Exxon and Mobil to form ExxonMobil, creating a larger energy company with complementary operations. The deal illustrates how companies may merge to strengthen their competitive position, improve operational efficiency, and achieve economies of scale.
What is an example of an acquisition?
Disney’s acquisition of Pixar in 2006 is a notable example of an acquisition. Disney acquired Pixar in an all-stock transaction valued at approximately $7.4 billion, combining Pixar’s animation expertise and creative talent with Disney’s entertainment brands and distribution capabilities. The deal demonstrates how an acquisition can help a company gain valuable intellectual property, technology, and specialized expertise.
What is the difference between a merger and an acquisition?
A merger generally involves two companies combining to form a single business, while an acquisition occurs when one company purchases and gains control of another. In a merger, the companies may present the transaction as a combination of equals, although their ownership and management structures can differ. In an acquisition, the buyer typically takes control of the acquired company, which may continue operating as a subsidiary or be integrated into the buyer’s business. The legal structure and outcome depend on the terms of the transaction.
What makes an M&A deal successful?
A successful mergers and acquisitions (M&A) deal typically begins with a clear strategic rationale and a realistic assessment of the value the transaction can create. Thorough financial, legal, commercial, operational, and regulatory due diligence helps buyers identify risks before closing. After the deal closes, effective integration planning, clear communication, cultural alignment, and measurable performance goals help the combined business realize its intended benefits. Success should be evaluated against the deal’s original objectives and longer-term business results, not simply the completion of the transaction.
Why do mergers and acquisitions fail?
Mergers and acquisitions can fail when companies overestimate potential synergies, pay too much, overlook important risks during due diligence, or struggle to integrate their operations and cultures. Regulatory obstacles, unexpected market changes, unclear leadership responsibilities, and poor communication can also prevent a deal from achieving its objectives. For example, the AOL–Time Warner combination announced in 2000 is widely cited as a disappointing deal because the expected benefits of combining internet and media businesses did not materialize as anticipated. The case highlights the importance of realistic valuations, strategic fit, and effective post-merger integration.
What is the biggest merger or acquisition in history?
The answer depends on how transaction size is measured, including whether the comparison uses announced deal value, enterprise value, equity value, or inflation-adjusted figures. Vodafone’s acquisition of Germany’s Mannesmann, completed in 2000, is frequently cited among the largest corporate acquisitions, with a reported transaction value of approximately $181 billion. The AOL–Time Warner transaction, announced in 2000 and completed in 2001, is another landmark deal often cited among the largest mergers. Because rankings vary by methodology, it is important to specify the valuation measure and source when comparing the largest M&A transactions in history.
Which industry has the most M&A?
Leading sectors for M&A activity include technology, materials, defence and aerospace. Read expert predictions for 2025 for tech M&A or energy, utilities and mining .
