About TomoTherapy
TomoTherapy is a Healthcare company based in Madison (United States) founded in 1997 by Thomas Rock, and was acquired by Accuray in March 2011. Radiation therapy systems for treating various cancers are developed. TomoTherapy has raised $17.74 million across 3 funding rounds from investors including Accuray, The Endeavor Group and Ascension Ventures. TomoTherapy offers products and services including Radixact System, CyberKnife, and TomoTherapy. Its focus areas include Life Sciences, Oncology, Medical Devices and Therapies. Its legal entity is TomoTherapy, Inc. Its competitors include RefleXion, Mevion Medical Systems and ZAP-X; 3 of its 3 listed competitors have raised funding.
Company details
TomoTherapy was founded in 1997 in Madison, United States, as a developer of radiation therapy systems within the medical devices sector. Operations focus on integrating CT imaging with conformal radiation therapy to treat cancers while minimizing exposure to healthy tissues. The Hi-Art system is provided as a key solution for diverse cancer types. Co-founder Thomas Rock contributed to its establishment, with activities centered in oncology applications.
- Headquarters Madison, United States
- Founders Thomas Rock
- Stage Acquired
- SectorsHealthcare
- Website tomotherapy.com
- Social LinkedIn
- Acquired by Accuray (Mar 2011)
- Legal Name Tomotherapy, Inc
Products & Services of TomoTherapy
TomoTherapy offers a comprehensive portfolio of products and services, including Radixact System, CyberKnife, and TomoTherapy.
Delivers precise radiation for cancer treatment using imaging guidance.
Provides non-invasive robotic treatment for tumors.
Offers integrated system for comprehensive cancer care delivery.
Funding Insights of TomoTherapy
TomoTherapy has successfully raised a total of $17.74M across 3 strategic funding rounds. The most recent funding activity was a Series B round of $7 million completed in February 2004. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $17.74M
- Total Rounds 3
- Last Round Series B — $7M
- First Round $9M
(Sep 2002)
- Investors Count 5
All 3 funding rounds of TomoTherapy with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Feb 2004 | $7M | Series B | – | – | |
| Dec 2003 | $1.74M | Series B | – | – | – |
| Sep 2002 | $9M | Series B | – | – |
6 investors in total: 6 institutional.
Investors in TomoTherapy
TomoTherapy has secured backing from 6 investors, including venture fund and institutional investors. Prominent investors backing the company include Accuray, The Endeavor Group and Ascension Ventures.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Strategic investments in healthcare technologies and data innovations. | ascensionventures.org | |||
Private equity investment firm | advantagecap.com | New Orleans, United States | ||
Private equity fund management is provided by Open Prairie. | openprairie.com | Effingham, United States | ||
Multiple sectors focused seed & early stage VC firm investing in the US, Europe & Asia | ventureinvestors.com | Madison, United States | ||
Management consulting services | 2001 | theendeavorgroup.com | ||
Developer of AI-based robotic radiosurgery planning and delivery systems | 1990 | accuray.com | Sunnyvale, United States |
Investor details for TomoTherapy
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
- Complete investor list
- Round participation
- Investor portfolios
- Co-investor network
Verified entity values are shown only after access is granted.
People of TomoTherapy
5 people are tracked at TomoTherapy (3 in leadership, 2 in team).
| Name | Role | Group |
|---|---|---|
Thomas Rock | Co-Founder | Leadership |
Fred Robertson | CEO | Leadership |
Jerry Lentz | Director Of Global Field Operations | Leadership |
Dan Burdick | Field Service Engineer | Team |
Charles Thomas | Sr Field Service Engineer | Team |
Complete people profiles for TomoTherapy
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
- Full employee list
- Team structure
- Board tenure
- Professional contacts
Verified entity values are shown only after access is granted.
Timeline of TomoTherapy
5 dated milestones of TomoTherapy across 14 years, from founding to its latest funding, stage changes and deals.
- Founded TomoTherapy is founded.
- Funding First funding round of $9.0M.
- Funding Latest funding round, Series B, of $7.0M.
- IPO Lists on the stock exchange (IPO).
- Exit Acquired by Accuray.
Competitors of TomoTherapy
TomoTherapy has 3 listed competitors in our database, 3 of them funded. They include RefleXion, Mevion Medical Systems and ZAP-X.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| reflexion.com | 2009 | Hayward, United States | $553.91M | 257 | Biology-guided radiotherapy systems are provided for cancer treatment. | |
| mevion.com | 2004 | Littleton, United States | $500.18M | 136 | Proton therapy systems are supplied for cancer radiation treatment. | |
| zapsurgical.com | 2014 | San Carlos, United States | $159M | Developer of gyroscopic radiosurgery platform |
Detailed competitors of TomoTherapy
The full competitor set, operating metrics and side-by-side benchmarks require an active premium plan.
- Full competitor set
- Operating metrics
- Benchmarks
- Competitive positioning
Verified entity values are shown only after access is granted.
Web traffic of TomoTherapy
Websites that share an audience with TomoTherapy (tomotherapy.com).
Websites whose visitors overlap most with TomoTherapy. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
patientresource.com | patientresource.com | 100% | #2,164,456 | – | |
| wmcc.org | 95% | 5.7K | #3,437,985 | View details | |
| mskcc.org | 66% | 3.6M | #15,559 | View details | |
crccmd.com | crccmd.com | 60% | – | ||
barrenriverregionalcancercenter.com | barrenriverregionalcancercenter.com | 58% | – | ||
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
| •••••••••• | ••••••.com | ••% | •.•M | #••••• | – |
All 7 similar websites and full traffic analytics for TomoTherapy
The complete similar-websites list, audience overlap and engagement analytics require an active premium plan.
- 7 similar websites
- Audience overlap
- Engagement analytics
- Traffic by brand
Verified entity values are shown only after access is granted.
Top companies in Oncology
3 companies that operate in the same segment as TomoTherapy (Oncology) in United States, ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
mRNA-based therapeutics for diseases including cancer and infections are developed. | 2010 | Cambridge, Massachusetts, United States | USD 2.78 B | USD 1.94 B | 5,800 | |
Digital sequencing technology for cancer detection is developed. | 2012 | Redwood City, California, United States | USD 557.5 M | USD 982.02 M | 4,867 | |
Circulating tumor DNA is screened for early cancer detection. | 2016 | Menlo Park, California, United States | USD 2 B | USD 147.17 M | 1,141 |
Unlock complete access to The Company Check
Get unrestricted viewing across everything we track — from companies and brands to investors, funding rounds, acquisitions, financials, and more.
- Unlimited viewing on all profiles Companies, investors, financials, funding, acquisitions & directors
- Full access to every database India & global coverage, advanced filters and rich profile details
- Always-on access from your team account Single premium plan for everything you see on the portal
Related news about Tomotherapy
Complete news archive for TomoTherapy
Full article history, source details, and older brand coverage require an active premium plan.
- Full article archive
- Source and publication date
- Older coverage
- Brand-specific news history
Verified entity values are shown only after access is granted.
Frequently Asked Questions about TomoTherapy
TomoTherapy was founded in 1997 and raised its 1st funding round 5 years after it was founded.
TomoTherapy is headquartered in Madison, United States. It is registered at Madison, Wisconsin, United States.
TomoTherapy is a funded company, having raised a total of $17.74M across 3 funding rounds to date. The company's 1st funding round was a Series B of $9M, raised on Sep 2002.
TomoTherapy was founded in 1997 in Madison, United States, as a developer of radiation therapy systems within the medical devices sector. Operations focus on integrating CT imaging with conformal radiation therapy to treat cancers while minimizing exposure to healthy tissues. The Hi-Art system is provided as a key solution for diverse cancer types. Co-founder Thomas Rock contributed to its establishment, with activities centered in oncology applications.
TomoTherapy's top competitors include RefleXion, ZAP-X and Mevion Medical Systems.
TomoTherapy offers Radixact System, CyberKnife, and TomoTherapy.
TomoTherapy has 6 investors. Key investors include Accuray, The Endeavor Group, Ascension Ventures, Advantage Capital, and Open Prairie.
TomoTherapy operates through Tomotherapy, Inc.
Yes. TomoTherapy was acquired by Accuray in March 2011.