Arthur MacWaters Net Worth (Estimated)

Who is Arthur MacWaters?

Arthur MacWaters is a founder of Legion Health, a company that focuses on improving care for patients with chronic conditions. He is a Y Combinator graduate from the Summer 2021 batch.

Highlights:

• Y Combinator S21
• University of California, Berkeley
• Data science background

About Legion Health

Legion Health is building autonomous medical care, starting with psychiatry. Our AI-native care-delivery platform currently automates 95% of the administrative work required for us to deliver direct patient care. We also became the first company ever to receive regulatory authorization to let AI prescribe psychiatric medications, allowing us to not only collapse health care’s admin costs but also its clinical...

Model inputs

• Stage: seed
• Valuation tier: raise-10x
• Funding input: reported raise $6.3M
• Valuation note: Leftover $6.3M seed matches the published close. Do not lock the earlier $2M, Form D later marks, or a lifetime total.
• Research as-of: 2026-09-14
• Funding source: https://bhbusiness.com/2024/10/16/legion-health-pivots-to-digital-ai-enabled-psychiatry-raises-over-6m/

FAQ: Arthur MacWaters net worth and Legion Health valuation

What is Arthur MacWaters's net worth?

Arthur MacWaters's estimated net worth / paper wealth is $15.8M (range $11.0M–$23.6M) as of 2026. Entrepreneurial Check publishes an independent model-based estimate from public company and role data.

Arthur MacWaters net worth

Arthur MacWaters's estimated net worth / paper wealth is $15.8M (range $11.0M–$23.6M) as of 2026. This Arthur MacWaters net worth figure is estimated paper wealth, not a verified statement of assets.

How much is Arthur MacWaters worth?

Arthur MacWaters's estimated net worth / paper wealth is $15.8M (range $11.0M–$23.6M) as of 2026. How much Arthur MacWaters is worth here means estimated paper wealth from public company and role data — not financial advice.

How rich is Arthur MacWaters?

Arthur MacWaters's estimated net worth / paper wealth is $15.8M (range $11.0M–$23.6M) as of 2026. “How rich is Arthur MacWaters” here means estimated paper wealth from public company and role data — not verified net worth or financial advice.

Arthur MacWaters fortune

Arthur MacWaters's estimated net worth / paper wealth is $15.8M (range $11.0M–$23.6M) as of 2026. This Arthur MacWaters fortune figure is estimated paper wealth only, not a verified statement of assets.

Arthur MacWaters equity value

Arthur MacWaters's estimated net worth / paper wealth is $15.8M (range $11.0M–$23.6M) as of 2026. Arthur MacWaters equity value on this page is modeled paper wealth from estimated ownership — not a disclosed cap table or verified net worth.

What is Legion Health valuation?

Legion Health's estimated valuation on Entrepreneurial Check is $63.0M. Independent model output, not a verified appraisal or official mark.

What is Legion Health post-money valuation?

Legion Health's estimated valuation on Entrepreneurial Check is $63.0M. That figure is a modeled post-money mark when a public raise is available — not a verified appraisal or official mark.

What is Legion Health funding?

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

How much did Legion Health raise?

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

How much money did Legion Health raise?

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

What is Legion Health series funding?

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

What company is Arthur MacWaters building?

Arthur MacWaters is Founder at Legion Health, a Y Combinator-backed startup (batch S21).

What does Legion Health do?

Legion Health — Autonomous medical care

What YC batch is Arthur MacWaters from?

Arthur MacWaters is associated with Y Combinator batch S21.

Where did Arthur MacWaters go to school?

Public profiles associate Arthur MacWaters with Bachelor's degree from the University of California, Berkeley.

Where is Arthur MacWaters based?

Public directory data lists Arthur MacWaters's region as United States of America.

What industry is Arthur MacWaters in?

Arthur MacWaters is listed under Healthcare, Consumer Health and Wellness.

How big is Legion Health?

Public data lists Legion Health's team size as 11.

What else is notable about Arthur MacWaters?

Y Combinator S21.

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.