The power to stop cancer.
The experience to know how.
The dedication to make a difference.

Our purpose

We are bringing the power of precision radiopharmaceuticals into a new era.

Radiopharmaceuticals – a class of precision oncology medicines – are poised to transform the treatment of solid tumors. By hitching a radioisotope to a small molecule, these potent therapies can selectively deliver the proven power of radiation directly to tumors throughout the body.

We are applying our deep drug discovery and development expertise against novel cancer targets from a broad class of surface receptors to produce targeted small molecule radiopharmaceuticals. We seek to create effective new treatments for cancer patients that enable us to go far beyond what’s been done before – bringing us closer to the day we can say “cure.”

Innovative approach, immense possibilities

First-in-class targets for cancer

Targeting GPCRs, a vast and largely unexplored class for radiopharmaceuticals

Differentiated small molecule approach

Broadly enabling foundational platform based on decades of drug development experience

Modular flexible platform

Agnostic to alpha- or beta-emitting radioisotopes

Extensive pipeline

Moving multiple programs rapidly towards clinical development

Dual purpose enabling a targeted medicine approach

The versatile utility of radiopharmaceuticals is core to our development strategy.

Part of a treatment strategy known as theragnostics, radiopharmaceuticals can be used for both therapy and diagnosis.

Radiopharmaceuticals, when tethering a radionuclide suitable for imaging, create a map of cancerous tumors in the body that provides precise diagnostic information. From the imaging results, the patients who are most likely to respond are identified and treated with individualized regiments of the therapeutic version of the same radiopharmaceutical. This precision medicine approach seeks to make substantial improvements in clinical outcomes.


Broadly enabling technology to dramatically expand the application of radiopharmaceuticals.
We deliver targeted effects of radiation via optimal drug design.
small-molecule radiopharmaceutical targeting GPCR
We have built the only platform for the rapid discovery and development of novel small molecule radiopharmaceuticals that bind to GPCRs overexpressed on cancer cells.

Small molecules, tethered with powerful radioisotopes, are designed to exquisitely bind to receptors overexpressed in cancer and deliver powerful radiation to kill tumors, without affecting normal tissue.

Our unique approach marries a vast knowledge of GPCR biology with unrivaled proficiency in small molecule medicinal chemistry to develop potent and highly selective radiopharmaceuticals. We take a fit-for-purpose approach, pinpointing the precise target and selecting the ideal small molecule ligand paired with the optimal radioisotope to achieve a therapeutic effect.

Novel targets for solid tumors

GPCR family tree showing 132 peptide and protein GPCRs
GPCRs – expansive and largely unexplored target space for radiopharmaceuticals

Largest gene family in humans

132 known protein/receptor pairs

>65 with increased tumor expression

Given GPCR overexpression in many tumors, they can be targeted in a vast range of cancer indications, from common to rare tumors.

and investors

The Radionetics platform was built and incubated within Crinetics (CRNX), a leader in GPCR-targeted drug development, prior to our spin out and financing by 5AM Ventures and Frazier Healthcare in October 2021. Our continued collaboration with Crinetics accelerates our early discovery efforts.

Crinetics Pharmaceuticals
5AM Ventures
Frazier Healthcare Partners


Scott Struthers, Ph.D.
Chairman; CEO
Dan Estes, Ph.D.
General Partner
Frazier Healthcare Partners
Andy J. Schwab
Managing Partner
5AM Ventures
Zachary Hornby
Boundless Bio
Nishan de Silva, M.D.
Radionetics Oncology


join us

Join a fast-growing company with a deep foundation and vast opportunity, where every contribution matters.

Our location in the heart of San Diego’s thriving life sciences community means our team is made up of industry-leading experts in a range of disciplines and from a variety of backgrounds, united by a shared passion for turning science into meaningful discoveries for cancer patients.



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Umesh Gangadharmath

Umesh Gangadharmath, Ph.D

Senior Vice President, Technical Operations

Umesh Gangadharmath, Ph.D is Senior Vice President, Technical Operations and has focused his career on radiopharmaceutical development and manufacturing in both academic and commercial settings. He has over 16 years of experience in researching and developing novel radiopharmaceuticals in the areas of oncology, cardiology and neurology for use in positron emission tomography (PET) imaging and has established GMP radiopharmaceutical manufacturing sites globally to support clinical trials. Dr. Gangadharmath’s breadth of expertise spans from preclinical development, support of CMC sections for IND submissions, early clinical research, through full clinical production. Most recently, he was Chief Operating Officer at Optimal Tracers, a CDMO with the responsibility of supporting radiopharmaceutical production for biopharmaceutical companies. He spent the last 10 years building Optimal Tracers from concept to a mature, fully functioning GMP radiopharmaceutical manufacturing facility. Dr. Gangadharmath and his team at Optimal Tracers were also involved in establishing a fully GMP radiopharmaceutical manufacturing facility for clinical research at University Hospitals Cleveland Medical Center. Dr. Gangadharmath has held previous roles as Director for the biomedical cyclotron facility at UCLA and as Senior Scientist, Radiochemistry at Siemens Molecular Imaging Biomarker Research. He was part of the team that invented TAUVID during his work at Siemens Molecular Imaging Biomarker Research (Flortaucipir; Avid Radiopharmaceuticals, Inc., a wholly owned subsidiary of Eli Lilly and Company) for imaging tau pathology and is well-published in the field of radiopharmaceuticals. He also has served as a member of United States Pharmacopeia (USP) Radioactive Drugs Expert Panel and played a key role in setting up a molecular imaging program at Loma Linda University Medical Center. He received his M.Sc. and Ph.D in Inorganic Chemistry from Karnatak University Dharwad, India and completed a postdoctoral fellowship at UCLA under the supervision of Dr. Hartmuth Kolb.

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