• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia

Trendingnow

1

Philanthropy leader at Warren Buffett and Bill Gates’ Giving Pledge says children of billionaires are pushing them to give their wealth away faster

2

Meet a 71-year-old who retired as a radiologist and professor, and now runs a banana-skewer business: ‘I never want to retire. Why would you do that?’

3

China suffers another setback in effort to de-dollarize global finance as anchor in the greenback's dominance quietly exits Beijing's payment scheme

1

Philanthropy leader at Warren Buffett and Bill Gates’ Giving Pledge says children of billionaires are pushing them to give their wealth away faster

2

Meet a 71-year-old who retired as a radiologist and professor, and now runs a banana-skewer business: ‘I never want to retire. Why would you do that?’

3

China suffers another setback in effort to de-dollarize global finance as anchor in the greenback's dominance quietly exits Beijing's payment scheme
FinanceVenture Capital

Proton therapy startup raises $200 million to treat cancer patients

By
Dan Primack
Dan Primack
Down Arrow Button Icon
By
Dan Primack
Dan Primack
Down Arrow Button Icon
August 4, 2015, 12:58 PM ET
Photograph by Mark McCarty
Google source logo
Add Fortune on Google for similar content.

Proton therapy developer Mevion Medical Systems yesterday withdrew its registration for an initial public offering. Today we learned why, as the Massachusetts-based company announced that it has raised $200 million in new equity funding led by Chinese investment firms HOPU Investments and YuanMing Capital.

This is on top of around $169 million in prior investment, and included participation by existing investors Caxton Alternative Management, ProQuest Investments, Venrock and CHL Medical Partners. No valuation information was disclosed, although a source close to the situation says the company is not yet in the unicorn club (i.e., valued at $1 billion or more).

Mevion CEO Joe Jachinowski says that the new deal is intended to help Mevion expand into China, which he calls “the second-largest radio therapy market in the world.” The leading investors not only will make introductions, but also will partner on (and provide additional capital to find) a new joint venture that will produce, sell and service proton therapy systems for the Chinese market. Specific financial terms for the JV are still being worked out.

As for Mevion’s stateside commercialization efforts, the company currently has four proton therapy systems already in the field, with Jachinowski saying that deployment typically takes around two to three years from the time a contract is signed. Clinical ramp-ups, however, are down to around three months.

Get Term Sheet, our daily newsletter on deals and deal-makers.

About the Author
By Dan Primack
See full bioRight Arrow Button Icon

Latest in Finance


Most Popular

Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • TikTok icon
  • YouTube icon

    Latest in Finance


    Most Popular

    © 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
    FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.