About CTSI
CTSI is a company based in Pittsburgh (United States) founded in 2006 by Peter Ellis and Stanley Marks, and was acquired by Varian Medical Systems in May 2019. Clinical and administrative solutions for cancer treatment are provided. CTSI has raised $2 million across 1 funding round from investors including Varian and TPG. The company has 5 employees.
Company details
CTSI was founded in 2006 in Pittsburgh, United States, within the healthcare sector focused on oncology. A network of cancer treatment facilities has been established, including the flagship American Oncology Institute. Services offered encompass radiation oncology, medical oncology, surgical oncology, diagnostics, and support care for complex diseases. Operations are centered on clinical and administrative solutions to support treatment processes.
- Headquarters Pittsburgh, United States
- Employees 5
- Founders Peter Ellis, Stanley Marks
- Stage Acquired
- Emailβ’β’β’β’β’β’β’β’
- Phoneβ’β’β’β’ β’β’β’β’
- Website cancertreatmentservices.com
- Acquired by Varian Medical Systems (May 2019)
- Total Equity Funding$2M (USD)
in 1 rounds
- Latest Funding Round$2M (USD), Seed
Mar 2009
- InvestorsVarian
& 1 more
- Employee Count5
- Acquired by
Funding Insights of CTSI
CTSI has successfully raised a total of $2M through 1 strategic funding round. The most recent funding activity was a Seed round of $2 million completed in March 2009. 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 $2M
- Total Rounds 1
- Last Round Seed β $2M
- First Round $2M
(Mar 2009)
All 1 funding rounds of CTSI 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 |
|---|---|---|---|---|---|
| Mar 2009 | $2M | Seed | β | β | β |
2 investors in total: 2 institutional.
Investors in CTSI
CTSI has secured backing from 2 investors, including institutional and venture fund investors. Prominent investors backing the company include Varian and TPG.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Fund of funds focused on pre-seed and seed-stage companies | 1992 | tpg.com | Fort Worth, United States | |
Varian is focused on developing cancer treatment technologies. | 1948 | varian.com | Palo Alto, United States |
Investor details for CTSI
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 CTSI
2 people are tracked at CTSI (2 in leadership); the tracked headcount is 5.
| Name | Role | Group |
|---|---|---|
Peter Ellis | Co-Founder & Director | Leadership |
Stanley Marks | Co-Founder & Chairman | Leadership |
Complete people profiles for CTSI
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 CTSI
4 dated milestones of CTSI across 13 years, from founding to its latest funding, stage changes and deals.
- Founded CTSI is founded.
- Funding First funding round of $2.0M.
- Exit Acquired by TPG.
- Exit Acquired by Varian Medical Systems.
Web traffic of CTSI
Websites that share an audience with CTSI (cancertreatmentservices.com).
Websites whose visitors overlap most with CTSI. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
| citizenshospitals.com | 30% | 72.9K | #549,039 | View details |
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Related news about Ctsi
Complete news archive for CTSI
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- Full article archive
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- Older coverage
- Brand-specific news history
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Frequently Asked Questions about CTSI
CTSI was founded in 2006 and raised its 1st funding round 3 years after it was founded.
CTSI is headquartered in Pittsburgh, United States. It is registered at Pittsburgh, Pennsylvania, United States.
CTSI is a funded company, having raised a total of $2M across 1 funding round to date. The company's 1st funding round was a Seed of $2M, raised on Mar 2009.
CTSI has 5 employees.
CTSI was founded in 2006 in Pittsburgh, United States, within the healthcare sector focused on oncology. A network of cancer treatment facilities has been established, including the flagship American Oncology Institute. Services offered encompass radiation oncology, medical oncology, surgical oncology, diagnostics, and support care for complex diseases. Operations are centered on clinical and administrative solutions to support treatment processes.
Yes. CTSI was acquired by Varian Medical Systems in May 2019.

