OS Therapies: Funding, Investors & Team (Oct 2026)
OS Therapies operates as a clinical-stage therapeutic company focused on the identification, development, and commercialization of treatments for osteosarcoma and other solid tumors. It was launched to meet the significant unmet need for new treatments for cancers of the bone in kids and adults. The company has expanded the pipeline beyond Osteosarcoma with OST-HER2 into other solid tumors with the same recurrence mechanism of action, including breast, esophageal, and lung cancer.
OS Therapies has raised $23.0M across 4 funding rounds on record, the most recent an undisclosed round of $5.3M announced in Apr 2026.
That round is in line with the $5.0M median round size for Health Care companies tracked on FundedIQ over the last two years.
OS Therapies Company Profile and Key Stats
Latest funding round on record: Apr 2026.
OS Therapies Funding Rounds
OS Therapies raised $6.0M in an undisclosed round announced in Dec 2024.
7 months later, an undisclosed round of $4.2M was announced in Jul 2025.
6 months later, an undisclosed round of $7.5M was announced in Jan 2026.
3 months later, an undisclosed round of $5.3M was announced in Apr 2026.
OS Therapies Founders and Leadership Team
Contact details for the OS Therapies team: 1 of 1 has an email address on file.
Start 14-day free trial →OS Therapies Funding Compared to Other Health Care Startups
OS Therapies' latest round of $5.3M is in line with the median round in Health Care. Medians cover the last 24 months of disclosed rounds.
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OS Therapies Funding FAQs
What does OS Therapies do?
OS Therapies operates as a clinical-stage therapeutic company focused on the identification, development, and commercialization of treatments for osteosarcoma and other solid tumors. It was launched to meet the significant unmet need for new treatments for cancers of the bone in kids and adults. The company has expanded the pipeline beyond Osteosarcoma with OST-HER2 into other solid tumors with the same recurrence mechanism of action, including breast, esophageal, and lung cancer.
How much funding has OS Therapies raised?
OS Therapies has raised $23.0M across 4 rounds on record. The most recent is an undisclosed round of $5.3M announced in Apr 2026.
When did OS Therapies last raise funding?
OS Therapies' most recent funding round on record is an undisclosed round of $5.3M, announced in Apr 2026.
Who founded OS Therapies?
FundedIQ lists Paul Romness (Founder) at OS Therapies.
Where is OS Therapies headquartered?
OS Therapies is based in Rockville, Maryland, United States.
How many employees does OS Therapies have?
OS Therapies is in the 1-10 employee band.
How does OS Therapies' funding compare to other Health Care startups?
OS Therapies' latest round of $5.3M is in line with the $5.0M median round size for Health Care companies on FundedIQ across 3,660 tracked companies over the last two years.
About FundedIQ's OS Therapies Funding Data
FundedIQ tracks announced funding rounds and refreshes this profile every week. Round dates, stages and amounts are normalised to a single format, converted to US dollars, and de-duplicated: two records of the same round announced days apart are merged, and two genuinely different rounds are kept apart on the amounts they disclose. Amounts shown are the disclosed figures only — a round announced without a number is listed and excluded from the total rather than estimated.
Employee counts are reported bands, not exact headcounts. Founder and executive names carry the job title on record. Anything we do not hold for OS Therapies is left off this page rather than filled in.
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