Committee Chair Maria Cantwell (D-Wash.) solicits advice from witnesses for additional authorities to conduct oversight of PBMs and pushes for a GAO study.

Former tops execs at GSK and Lilly are going to try their hand at running PBMs. If they need advice, they can ask their predecessors from the 1990s, when big pharma ran the big three PBMs.

Former GSK CEO Witty stood out among big pharma chief execs for his pessimistic outlook on US drug pricing, which shaped his diversification strategy at GSK. His experience as a pharma insider makes him an interesting choice to lead United's PBM and health services arm.

The health insurer Cigna is poised to acquire the largest independent PBM in the US. With other consolidation throughout the sector, this signals sweeping changes to the way drug distribution is managed.