RIVERSIDE — The sale of Merck's Cherokee plant to a Philadelphia-based labor force management company was completed Friday, according to unofficial reports.

Merck said last week its biggest tariff exposure is through Keytruda and it has enough US inventory for this year. It estimated $200 million in additional costs for the levies implemented to date.

RIVERSIDE — Though Merck is phasing out its Cherokee Plant in Riverside, the company recently acquired a parcel of land adjacent to the plant.

Drugmaker Merck said Tuesday it is investing $1 billion in a new Delaware plant to expand domestic production as it prepares to deal with President Trump’s tariffs. The new facility will produce ...