2. **Mayo Clinic** – Mayo Clinic conducts medical research and may sponsor H1B visas for qualified researchers.
3. **Fred Hutchinson Cancer Research Center** – This Seattle-based research center focuses on cancer and related diseases.
4. **Cleveland Clinic** – The Cleveland Clinic Foundation is a nonprofit academic medical center that conducts research and may sponsor H1B visas.
5. **Dana-Farber Cancer Institute** – A Boston-based research institute specializing in cancer research.
6. **Memorial Sloan Kettering Cancer Center** – An organization dedicated to cancer research and treatment.
7. **St. Jude Children’s Research Hospital** – A pediatric research hospital located in Memphis, Tennessee.
8. **The Scripps Research Institute** – A nonprofit American medical research facility that conducts scientific research in various fields.
9. **Children’s Hospital of Philadelphia (CHOP)** – A leading pediatric hospital involved in research and healthcare.
10. **American Cancer Society** – A nonprofit organization dedicated to cancer research, education, and advocacy.
11. **Joslin Diabetes Center** – A diabetes research center affiliated with Harvard Medical School.
12. **Sanford Burnham Prebys Medical Discovery Institute** – A nonprofit research institute focused on medical and scientific research.
13. **California Institute of Technology (Caltech)** – A world-renowned research university that sponsors H1B visas for research positions.
14. **The Salk Institute for Biological Studies** – A prominent nonprofit research institute in biological sciences.
15. **Broad Institute of MIT and Harvard** – A collaborative research institute focused on genomics and medical research.
16. **Whitehead Institute for Biomedical Research** – A nonprofit research institute affiliated with MIT.
17. **Woods Hole Oceanographic Institution** – A nonprofit research organization dedicated to ocean science and exploration.
18. **Fred Rogers Center for Early Learning and Children’s Media** – Focuses on children’s media research and education.
19. **International Food Policy Research Institute (IFPRI)** – An organization focused on agricultural and food policy research.
20. **RAND Corporation** – A nonprofit global policy think tank that conducts research on various policy issues.
21. **Urban Institute** – A nonprofit organization conducting research on social and economic policy issues.
22. **Pew Research Center** – A nonpartisan think tank that conducts research on various issues, including social and demographic trends.
23. **Kaiser Family Foundation** – A nonprofit organization that conducts research on healthcare issues.
24. **Guttmacher Institute** – A nonprofit organization focused on sexual and reproductive health research.
25. **Brookings Institution** – A think tank that conducts research on economic and policy issues.
Please note that the availability of H1B sponsorship can change over time, and it’s essential to verify the current status with the respective organizations and the USCIS. Additionally, there are many other nonprofit research organizations in the United States, and this list is not exhaustive.