Private company

Chiron Corporation

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American biotechnology firm (1981–2006)

Chiron Corporation ( KY-ron) was an American multinational biotechnology firm founded in 1981, based in Emeryville, California, that was acquired by Novartis on April 20, 2006. It had offices and facilities in eighteen countries on five continents. Chiron's business and research was in three main areas: biopharmaceuticals, vaccines, and blood testing.2 It was founded by Pablo DT Valenzuela and William J. Rutter.1 It employed 5,400 people in 2005.1 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

1981Founded1

Chiron Corporation ( KY-ron) was an American multinational biotechnology firm founded in 1981, based in Emeryville, California, that was acquired by Novartis on April 20, 2006. It had offices and facilities in eighteen countries on five continents. Chiron's business and research was in three main areas: biopharmaceuticals, vaccines, and blood testing. Chiron's vaccines and blood testing units were combined to form Novartis Vaccines and Diagnostics, while Chiron BioPharmaceuticals was integrated into Novartis Pharmaceuticals. In 2014, Novartis completed the sale of its blood transfusion diagnostics unit to Grifols and announced agreements for the sale of its vaccines unit to GlaxoSmithKline.2

Corporate structure

Chiron Corporation is part of a group headed by Novartis. 52 entities, 20 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

  • Novartis Basel, Switzerland
    • Chiron Corporation Emeryville
      • Novartis-MIT Center for Continuous Manufacturing Subsidiary · Cambridge, United States
    • Alcon Subsidiary · Fribourg, Switzerland
      • Alcon (Canada) Subsidiary
      • Alcon (China) Subsidiary
      • Alcon (France) Subsidiary
      • Alcon (South Korea) Subsidiary
      • Alcon (United Kingdom) Subsidiary
      • Alcon Japan Subsidiary · Minato, Japan
      • Alcon (India) Subsidiary · India
      • Alcon (Ireland) Subsidiary · Ireland
      • Alcon (United States) Subsidiary · United States
      • ALCON LABORATORIES (INDIA) PRIVATE LIMITED Subsidiary · Bangalore, India
      • Alcon Laboratories Belgium Subsidiary · Puurs-Sint-Amands, Belgium
      • ALCON MANAGEMENT SA Subsidiary · Vernier, Switzerland
      • ALCON PHARMACEUTICALS LTD Subsidiary · Fribourg, Switzerland
      • ALCON SINGAPORE MANUFACTURING PTE. LTD. Subsidiary · Singapore, Singapore
    • Ciba Vision Subsidiary · Duluth
    • Novartis (Austria) Subsidiary · Vienna, Austria
    • Novartis (Canada) Subsidiary · Mississauga, Canada
    • Novartis (France) Subsidiary · Rueil-Malmaison, France
    • Novartis (Germany) Subsidiary · Nuremberg, Germany
    • Novartis (Italy) Subsidiary · Origgio, Italy
    • Novartis (Japan) Subsidiary · Tokyo, Japan
    • Novartis (Mexico) Subsidiary · Mexico City
    • Novartis (Netherlands) Subsidiary · Arnhem, Netherlands
    • Novartis (United Kingdom) Subsidiary · Frimley, United Kingdom
    • Novartis Gene Therapies Subsidiary
    • Novartis Healthcare (India) Subsidiary · Hyderabad, India
    • Novartis Baltics, SIA Subsidiary · 100% · Latvia
    • Alcon Ophthalmika GmbH Subsidiary · Wien, Austria
    • Avidity Biosciences Subsidiary
    • EBEWE Pharma Ges.m.b.H. Nfg.KG Subsidiary · Unterach am Attersee, Austria
    • Medicines Company (United States) Subsidiary · United States
    • Novartis (China) Subsidiary · China
    • Novartis (Singapore) Subsidiary · Singapore
    • Novartis (Slovenia) Subsidiary · Slovenia
    • NOVARTIS BIOVENTURES AG Subsidiary · Basel, Switzerland
    • NOVARTIS CAPITAL CORPORATION Subsidiary · Wilmington, Delaware, United States
    • NOVARTIS HEALTHCARE PRIVATE LIMITED Subsidiary · Mumbai, India
    • and 8 more

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

The story

Founded by Pablo DT Valenzuela and William J. Rutter in 1981.1

Chiron was founded in 1981 by chairman, William J. Rutter, president and chief executive, Professor Edward Penhoet, and vice president for research, Pablo DT Valenzuela. All were academics from the University of California; Penhoet at Berkeley, where he continued to lecture, and the others from San Francisco.

Chiron formed a partnership with the Swiss pharmaceutical giant, Ciba-Geigy Ltd., through the Biocine Company, to use genetic engineering to develop vaccines and to treat, prevent and diagnose diseases such as AIDS, herpes and malaria. Other partnerships included Thicon Inc. to develop a growth factor hormone for the treatment of wounds and Merck & Co to develop an improvement to their existing hepatitis B vaccine.

In 1986, Professor Penhoet said: "Our business strategy is to dominate small markets rather than take a small presence in a broad market." The niche that Chiron was focusing on was ophthalmology, which Mr. Penhoet said was "big enough to be interesting, but small enough to service with 40 salespeople." Professor Penhoet also stated that Chiron was set up to provide the enabling technology for others to use under license, and later saying that Chiron was "as close to a virtual corporation as you can be", with few fixed assets but more relationships.

From 1982–1988, intense successive molecular biology studies at the Chiron Emeryville research labs had been undertaken for the treatment of hepatitis. In 1987, Rutter and his research team at Emeryville produced the first commercial genetically engineered vaccine against hepatitis B. Two years later, in 1989, Dr. Michael Houghton, Dr. Qui-Lim Choo, and Dr. George Kuo, in collaboration with Dr. Daniel W. Bradley at the CDC, finally identified the genome of the viral agent responsible for 80 to 90% of non-A and non-B post-transfusion hepatitis—the agent called hepatitis C virus. For this ground breaking discovery, Michael Houghton was one of the winners of the 2020 Nobel Prize in Medicine.

From Wikipedia’s article on Chiron Corporation, shared under CC BY-SA 4.0.4

Leadership

Who has led Chiron Corporation, and when. Pick a name to see everywhere that person has worked.

Products and brands

  • biopharmaceutical

Listed on Wikidata.1

Agrippal

Begrivac

Fluad

Fluvirin

Read the full text

Proleukin

RabAvert/Rabipur

TOBI

From Wikipedia’s article on Chiron Corporation, shared under CC BY-SA 4.0.4

Subsidiaries and ownership

Parent company

Subsidiaries

  • Novartis-MIT Center for Continuous Manufacturing

From Wikidata.1

Acquisitions

In 1992, the company's first product, Proleukin, was approved in United States for the treatment of metastatic melanoma; previously it was only approved for use with kidney cancer. This was followed a year later by Betaseron, a beta interferon, the first treatment for relapsing-remitting multiple sclerosis and made by Berlex Laboratories Inc.

In 1997 Chiron provided the active ingredient, becaplermin, in Regranex, a topical treatment for diabetic foot ulcers, manufactured by Ortho-McNeil Pharmaceutical Inc. In 2001, Chiron acquired PathoGenesis for its antibiotic drug Tobi, the first inhaled antibiotic approved for treating lung infections in cystic fibrosis patients.

Having launched its first vaccine product, Fluad, an adjuvant influenza vaccine, in 1996, the vaccine line was expanded significantly in 1998 with the acquisition of the European vaccine businesses of Behring (Germany) and Sclavo (Italy). This was followed in 2003 by the acquisition of PowderJect, the UK-based vaccines company, making Chiron the second-largest flu vaccines provider and the fifth-largest vaccines business in the world.

In 1998, Chiron's nucleic acid testing (NAT) blood-testing business was launched in cooperation with Gen-Probe, followed a year later by the launch of the Procleix system, which detects viral RNA and DNA in donated blood and plasma during the very early stages of infection, when those infectious agents are present but cannot be detected by immunodiagnostic tests.

Read the full text

Chiron expanded its cancer drug portfolio in 2002 with the acquisition of Matrix Pharmaceuticals Inc and its product tezacitabine.

Chiron also manufactured the MMR vaccine (measles mumps and rubella) at its Liverpool plant. Chiron in conjunction with Crucell (now part of Johnson & Johnson) developed a pentavalent vaccine called Quinvaxem targeting 5 diseases in children.

From Wikipedia’s article on Chiron Corporation, shared under CC BY-SA 4.0.4

Employees over time

  • 20055,4001

Timeline

  1. Apr 2006Dissolved Dissolved1
  2. 1981Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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