Primary care stocks are on the run.

All on news Amazon is set to add 1Life Healthcare (ONEM) to its growing healthcare unit for $3.9 billion, or $18 a share.

After all, according to Grand View Research:

“Primary care is the center of the U.S. healthcare system, reforms in the healthcare coverage will reenergize the infrastructure and aid the rebuilding of the primary care payment and delivery model. The comprehensive care provided by primary care physicians (PCPs) and the continuous patient and physician relationship is essential to improve the quality of care which will lead to positive patient outcomes in the long run.”

ONEM isn’t the only primary care stock moving on the news.

Oak Street Health (OSH) is up about 9%, or $2.24 on the news.  OSH is a network of value-based primary care centers for adults on Medicare. The company operates an innovative healthcare model focused on quality of care over volume of services, and assumes the full financial risk of its patients. Oak Street Health currently operates more than 140 centers across 20 states.