Details: Pfizer, one of the largest pharmaceutical companies globally, acquired Seagen, a biotechnology company specializing in cancer therapies. The acquisition strengthens Pfizer’s oncology portfolio, allowing the company to innovate further in targeted cancer treatments. Details: Pfizer, one of the largest pharmaceutical companies globally, acquired Seagen, a biotechnology company specializing in cancer therapies. The acquisition strengthens Pfizer’s oncology portfolio, allowing the company to innovate further in targeted cancer treatments. Details: Pfizer, one of the largest pharmaceutical companies globally, acquired Seagen, a biotechnology company specializing in cancer therapies. The acquisition strengthens Pfizer’s oncology portfolio, allowing the company to innovate further in targeted cancer treatments.