Seattle Genetics’ shares rocketed after news broke of Merck making a major investment into the Bothwell, Washington-based company via two strategic oncology deals.

The U.S. drug regulator will give a speedy review to AstraZeneca Plc’s experimental breast cancer treatment trastuzumab deruxtecan.

Puma Biotechnology Inc. announced that the U.S. Food and Drug Administration approved a labeling supplement for Nerlynx (neratinib) for the extended adjuvant treatment of HER2-positive early stage breast cancer.

An experimental breast cancer drug being developed by British drugmaker AstraZeneca and Japan’s Daiichi Sankyo’s met the main goal in a mid-stage study, bolstering the companies’ position in a highly competitive oncology market.

AstraZeneca will pay up to $6.9 billion to work with Daiichi Sankyo on a hotly tipped experimental treatment for breast cancer, in a direct challenge to the world’s largest cancer drug maker Roche.

Roche aims to broaden the use of the Swiss drugmaker’s Kadcyla breast cancer treatment as rivals crowd into the market with biosimilar copies of the company’s older mainstay product Herceptin.