Sarah Najmark Net Worth (Estimated)

Who is Sarah Najmark?

Sarah Najmark is a founder at Osium AI, a startup part of Y Combinator's Summer 2023 cohort.

About Osium AI

Our AI-powered software enables materials R&D engineers to design new materials much faster.

To date, manufacturing companies rely on trial-and-error and manual approaches to develop new materials. This is a tedious and time-consuming process. Yet, carbon neutrality requirements urge manufacturers to adopt greener and lighter materials to decarbonize the industry.

Model inputs

• Stage: seed
• Valuation tier: raise-10x
• Funding input: reported raise $2.6M
• Valuation note: Leftover $2.6M matches the TC seed. Do not lock the €1M Bpifrance add-on, CB Insights $3M scrape, or lifetime ~$3.5M.
• Research as-of: 2026-09-14
• Funding source: https://techcrunch.com/2023/11/22/osium-ai-uses-artificial-intelligence-to-speed-up-materials-innovation/

FAQ: Sarah Najmark net worth and Osium AI valuation

What is Sarah Najmark's net worth?

Sarah Najmark's estimated net worth / paper wealth is $13.0M (range $9.1M–$19.5M) as of 2026. Entrepreneurial Check publishes an independent model-based estimate from public company and role data.

Sarah Najmark net worth

Sarah Najmark's estimated net worth / paper wealth is $13.0M (range $9.1M–$19.5M) as of 2026. This Sarah Najmark net worth figure is estimated paper wealth, not a verified statement of assets.

How much is Sarah Najmark worth?

Sarah Najmark's estimated net worth / paper wealth is $13.0M (range $9.1M–$19.5M) as of 2026. How much Sarah Najmark is worth here means estimated paper wealth from public company and role data — not financial advice.

How rich is Sarah Najmark?

Sarah Najmark's estimated net worth / paper wealth is $13.0M (range $9.1M–$19.5M) as of 2026. “How rich is Sarah Najmark” here means estimated paper wealth from public company and role data — not verified net worth or financial advice.

Sarah Najmark fortune

Sarah Najmark's estimated net worth / paper wealth is $13.0M (range $9.1M–$19.5M) as of 2026. This Sarah Najmark fortune figure is estimated paper wealth only, not a verified statement of assets.

Sarah Najmark equity value

Sarah Najmark's estimated net worth / paper wealth is $13.0M (range $9.1M–$19.5M) as of 2026. Sarah Najmark equity value on this page is modeled paper wealth from estimated ownership — not a disclosed cap table or verified net worth.

What is Osium AI valuation?

Osium AI's estimated valuation on Entrepreneurial Check is $26.0M. Independent model output, not a verified appraisal or official mark.

What is Osium AI post-money valuation?

Osium AI's estimated valuation on Entrepreneurial Check is $26.0M. That figure is a modeled post-money mark when a public raise is available — not a verified appraisal or official mark.

What is Osium AI funding?

Osium AI funding, when a public raise is available, is a model input on this Entrepreneurial Check profile. How much Osium AI raised is not a complete cap table — figures are estimates only.

How much did Osium AI raise?

How much Osium AI raised, when disclosed, informs the estimated Osium AI valuation and founder paper-wealth figures on this page. Independent estimate only — not a complete cap table or financial advice.

How much money did Osium AI raise?

How much money Osium AI raised, when a public figure is available, is a model input for the estimated Osium AI valuation on this profile. Estimates only — not a complete cap table.

What is Osium AI series funding?

Osium AI series funding, when a public raise is disclosed, informs the estimated Osium AI valuation here. Not a complete financing history.

What company is Sarah Najmark building?

Sarah Najmark is Founder at Osium AI, a Y Combinator-backed startup (batch S23).

What does Osium AI do?

Osium AI — Speed up materials innovation with Artificial Intelligence

What YC batch is Sarah Najmark from?

Sarah Najmark is associated with Y Combinator batch S23.

Where is Sarah Najmark based?

Public directory data lists Sarah Najmark's region as France.

What industry is Sarah Najmark in?

Sarah Najmark is listed under B2B.

How big is Osium AI?

Public data lists Osium AI's team size as 2.

Is Entrepreneurial Check affiliated with Y Combinator?

No. Entrepreneurial Check is an independent informational site and is not affiliated with, endorsed by, or sponsored by Y Combinator or the profiled companies.