Burning Rock Biotech Limited primarily develops and provides cancer therapy selection tests in the People's Republic of China. It operates in three segments: Central Laboratory Business, In-Hospital Business, and Pharma Research and Development Services.

Neuronetics, Inc., a commercial stage medical technology company, designs, develops, and markets products for patients with neurohealth disorders in the United States and internationally.

Sera Prognostics, Inc., a women's health diagnostic company, discovers, develops, and commercializes biomarker tests for improving pregnancy outcomes. The company develops PreTRM test, a blood-based biomarker test to predict the risk of spontaneous preterm birth in asymptomatic singleton pregnancies.

FONAR Corporation, together with its subsidiaries, engages in the research, development, production, and marketing of magnetic resonance imaging (MRI) scanners for the detection and diagnosis of human diseases in the United States.

Biodesix, Inc. operates as a data-driven diagnostic solutions company in the United States. The company offers blood-based lung tests, including Nodify XL2 and Nodify CDT tests, together marketed as part of Nodify Lung Nodule Risk Assessment testing strategy, to assess the risk of lung cancer and help in identifying the appropriate treatment pathway and help physicians in reclassifying risk of malignancy in patients with suspicious lung nodules.

Exagen Inc. develops and commercializes various testing products based on its cell-bound complement activation products technology under the AVISE brand in the United States.

Psychemedics Corporation provides testing services for the detection of drugs of abuse through the analysis of hair samples in the United States, Brazil, and internationally.