Daiichi Sankyo

In 2006, Daiichi Sankyo acquired Zepharma, the OTC drugs unit of Astellas Pharma. On June 10, 2008, the company agreed to take a majority (64%) stake in Indian generic drug maker Ranbaxy, with a deal valued at about $4.6 billion.[12][13]

It acquired U3 Pharma in June 2008, contributing a therapeutic anti-HER3 antibody to the company's anticancer portfolio.[14] The company closed U3 Pharma in 2015.[15]

The acquisition of Plexxikon, a Berkeley, California-based pharmaceutical start-up company, was completed on April 4, 2011, for $805 million and an additional $130 million in milestone payments, pending on the success of Vemurafenib (Plexxikon's lead program) an oral, novel drug that targets the oncogenic BRAF mutation present in about half of melanoma cancers and about eight percent of all solid tumors. Daiichi Sankyo is retaining US co-promotion right of the (Roche licensed) drug.[16]

On April 7, 2014, Daiichi Sankyo announced it had agreed to vote its shares in Ranbaxy in favor of Sun Pharma's acquisition of 100% of Ranbaxy through the merger process which entailed a share swap. The transaction is set to close in December 2014, pending shareholder, court and regulatory approvals and other customary conditions. On September 29, 2014, Daiichi Sankyo agreed to acquire Ambit Biosciences for approximately $410 million, the deal enabled Daiichi to gain the Phase III cancer compound quizartinib.[17] On April 20, 2015, the company announced it had sold off the 8.9% stake in Sun Pharmaceutical Industries it acquired when acquiring Ranbaxy, raising $3.2 billion.[18]

It transferred 41 of its products in Japan to Alfresa Holdings Corporation for JPY 4.2 billion in 2018 in order to focus on oncology.[19] The company acquired ramosetron, nicardipine and barnidipine from Astellas Pharma in October 2019.[20]

In January 2020, the company's market value rose above JPY 5 trillion after the U.S. Food and Drug Administration approval and release of Enhertu,[21] an antibody-drug conjugate for cancer treatment.[22] Daiichi Sankyo developed Enhertu in cooperation with AstraZeneca,[21] which agreed in March 2019 to pay up to $6.9 billion to Daiichi Sankyo in exchange for a share of Enhertu's sales.[23][24] The shutdown of Plexxikon was announced in 2022[25] as Daiichi Sankyo pivots to focus on more antibody-drug conjugate therapies.[26]

The following is an illustration of the company's major mergers and acquisitions and historical predecessors (this is not a comprehensive list):

As of 2015, Daiichi Sankyo was being "closely monitored" after settling charges concerning payment of remuneration to physicians in the form of speaker fees as part of company's Physician Organization and Discussion program, in violation of the False Claims Act, an anti-kickback statute.[27]

Daiichi Sankyo agreed to pay the United States and state Medicaid programs $39 million to settle allegations by the United States Department of Justice over kickbacks to doctors.[27] As part of the company's Physician Organization and Discussion program which ran from 2005 through 2011, Daiichi Sankyo paid physicians improper kickbacks in the form of speaker fees to induce physicians to prescribe Daiichi Sankyo's drugs, including Azor, Benicar, Tribenzor and Welchol.[27] Allegedly, payments were made to physicians even when physician participants in PODs took turns “speaking” on duplicative topics over Daiichi-paid dinners, the recipient spoke only to members of his or her own staff in his or her own office, or the associated dinner was so lavish that its cost exceeded Daiichi Sankyo's own internal cost limitation of $140 per person.[27]

“Schemes such as this are particularly abhorrent,” said Inspector General Daniel R. Levinson for the U.S. Department of Health and Human Services.[27] “Manufacturers and physicians who engage in them are cheating Medicare and Medicaid out of millions of dollars and threatening programs upon which many elderly and disabled Americans rely. My office will take whatever steps necessary to guard against improper alliances between manufacturers of drugs and those who prescribe them. Through our corporate integrity agreement we will be closely monitoring Daiichi Sankyo.”[27]