Stock Markets July 7, 2026 06:12 AM

A Decade of Major U.S. Pharma and Biotech Deals, From Obesity Drugs to Rare Diseases

A compiled chronology of high-value acquisitions by U.S.-based pharmaceutical and biotech firms from 2015 through 2026

By Leila Farooq
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Vertex Pharmaceuticals' agreement to acquire Crinetics Pharmaceuticals for about $10 billion is the latest in a string of high-profile transactions by U.S. drugmakers and biotechs. Over the past decade, companies have pursued acquisitions across oncology, neurology, rare diseases, obesity and diagnostics, frequently paying billions to broaden pipelines or secure manufacturing and testing capabilities.

A Decade of Major U.S. Pharma and Biotech Deals, From Obesity Drugs to Rare Diseases
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Key Points

  • Acquirers paid multibillion-dollar prices to expand pipelines and capabilities
  • Deals covered oncology, immunology, rare diseases, obesity, diagnostics and manufacturing
  • Transactions have implications for diagnostics, bioprocessing and specialty manufacturing sectors

Vertex Pharmaceuticals' proposed purchase of Crinetics Pharmaceuticals for about $10 billion, announced July 7, extends Vertex's reach from blood disorders and pain into rare endocrine and hormonal diseases. That transaction is the most recent in a wave of large-scale deals by U.S. pharmaceutical and biotech companies over the past decade that target promising programs across multiple therapeutic areas.

Below is a year-by-year compilation of major deals involving U.S.-based acquirers and biotech or pharmaceutical targets, presented with the value and the transaction rationale as reported.


2026

  • Vertex Pharmaceuticals - Crinetics Pharmaceuticals - About $10 billion - To expand its portfolio in rare hormonal diseases.
  • Merck KGaA - Bio-Tech - $11.3 billion - To expand its presence in the life sciences market with access to research and bioprocessing tools.
  • AbbVie - Apogee Therapeutics - $10.9 billion - To expand immunology pipeline.
  • GSK - Nuvalent - $10.6 billion - To expand late-stage cancer drug pipeline.
  • Boston Scientific - Penumbra - $14.5 billion - To expand vascular pipeline.

2025

  • Abbott (N:ABT) - Exact Sciences - up to $23 billion - To gain access to Exact Sciences' cancer tests, including flagship colorectal cancer test Cologuard.
  • Merck - Cidara Therapeutics - $9.2 billion - To gain access to Cidara’s experimental drug for flu prevention.
  • Pfizer - Metsera - $10 billion - To gain a foothold in the fast-growing obesity treatment market.
  • Merck & Co - Verona Pharma - About $10 billion - Strengthens Merck’s respiratory portfolio amid looming Keytruda patent cliff.
  • Johnson & Johnson - Intra-Cellular Therapies - $14.6 billion - Expands J&J’s footprint in brain disease treatments.

2024

  • Novo Holdings - Catalent - $16.5 billion - Boosts manufacturing (including g debt).
  • Novo Nordisk - $11.5 billion - Nordisk’s popular obesity drug Wegovy (excluding g debt).

2023

  • Merck & Co - Prometheus Biosciences - $10.8 billion - Adds experimental treatment for ulcerative colitis and Crohn’s disease and builds up presence in immunology.
  • Bristol Myers Squibb - Karuna Therapeutics - $14 billion - BMY gains a promising antipsychotic medicine as patents on its older therapies near their expiry.
  • Pfizer - Seagen - $43 billion - Builds Pfizer’s cancer portfolio amid decline in sales for COVID-related products and generic competition.

2022

  • Amgen - Horizon Therapeutics - $27.8 billion - Buyout strengthens rare diseases portfolio; largest deal in the sector in 2022.
  • Pfizer - Biohaven Pharmaceutical Holding - $11.6 billion - Pfizer bets big on a new class of migraine drugs.

2021

  • Merck & Co - Acceleron Pharma - About $11.5 billion - Diversifies Merck’s portfolio beyond cancer.
  • Ginkgo Bioworks - Soaring Eagle Acquisition Corp - $17.5 billion - Ginkgo goes public through a merger with a blank-check vehicle.

2020

  • AstraZeneca - Alexion Pharmaceuticals - $39 billion - AstraZeneca’s largest-ever deal to diversify away from its cancer business, betting on rare-disease and immunology drugs.
  • Bristol Myers Squibb - MyoKardia - About $13 billion - Bolsters Bristol’s portfolio of heart disease treatments.
  • Gilead Sciences - Immunomedics - $21 billion - Strengthens Gilead’s cancer portfolio.

2019

  • Mylan - Pfizer’s Upjohn business - About $12 billion - Mylan’s acquisition of Pfizer’s Upjohn business was structured as a stock-based merger, resulting in the formation of Viatris; Upjohn was essentially spun off to Pfizer shareholders and then merged with Mylan.
  • AbbVie - Allergan - $63 billion - AbbVie gains control of Botox and diversifies beyond Humira (including g debt).
  • Pfizer - Array Biopharma - $11.4 billion - Pfizer gains oncology asset.
  • Bristol Myers Squibb - Celgene Corp - $74 billion - One of the largest pharmaceutical mergers in history.

2017

  • Johnson & Johnson - Actelion - $30 billion - Johnson’s subsidiary, Janssen Holding, acquires Actelion; Actelion’s R&D unit spun off into Idorsia.
  • Gilead Sciences - Kite Pharma - $11.9 billion - Strengthens Gilead’s position in cell therapy, particularly CAR-T treatments for cancer.

2016

  • Pfizer - Medivation - $14 billion - Pfizer acquires blockbuster prostate cancer drug Xtandi.

2015

  • Shire - Baxalta - $32 billion - Catapults Shire to a leading position in treating rare diseases.
  • AbbVie - Pharmacyclics - $21 billion - AbbVie gets access to what is expected to be one of the world’s top-selling cancer drugs and expands its oncology reach.
  • Valeant Pharmaceuticals (now Bausch Health) - Salix Pharmaceuticals - $14.5 billion - Makes Valeant a leader in gastrointestinal drugs.
  • Pfizer - Hospira - $15 billion - Deal creates a leading global established pharmaceutical business for Pfizer.

The list above reflects the major, high-value transactions involving U.S. acquirers and a variety of biotech and pharmaceutical targets, as reported. Collectively, these deals show continued appetite from large drugmakers to acquire late-stage assets, expand into new therapeutic areas, secure diagnostics and testing capabilities, and strengthen manufacturing and rare disease portfolios.

Summary

The acquisition of Crinetics by Vertex follows a decade-long pattern of multi-billion-dollar transactions by U.S. drugmakers. Targets have ranged from diagnostics firms to developers of oncology, neurology, immunology, obesity and rare-disease treatments. Several purchases were positioned to broaden pipeline diversity or to shore up manufacturing and testing capacity.

Key points

  • Major acquirers have repeatedly paid multi-billion-dollar premiums to gain late-stage assets and new therapeutic capabilities.
  • Transactions span a wide set of therapeutic areas, including oncology, immunology, rare diseases, neurology, obesity and diagnostics.
  • The deals can affect related sectors such as medical diagnostics, bioprocessing and specialty manufacturing.

Risks and uncertainties

  • Patent expirations and patent cliffs are cited in transaction rationale - for example, acquisitions described as strengthening respiratory or oncology portfolios were made amid concerns about future patent losses.
  • Some deals were framed in the context of declining sales for specific product lines, such as COVID-related products, and increased generic competition.
  • Certain transactions reference debt or financial structuring (parenthetical notes in reported descriptions), indicating potential balance-sheet and financing considerations for acquirers.

Note: Where the reported transaction descriptions contained abbreviated or parenthetical fragments, the wording above preserves those elements as presented in the compiled report rather than expanding on incomplete phrases.

Risks

  • Patent expirations and patent cliffs cited as drivers and risks for acquiring companies (affecting pharmaceutical and biotech sectors)
  • Declining sales for specific products and growing generic competition noted in deal rationales (impacting drugmakers' revenue profiles)
  • Some transactions referenced debt or financing considerations, indicating balance-sheet risks for acquirers (affecting corporate finance and credit markets)

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