Jan 20 (Reuters) – Japan’s Shionogi & Co said on Tuesday it ​would pay $2.13 billion for new ‌shares in ViiV Healthcare, its joint ‌venture with British drugmaker GSK, increasing its stake in the HIV drugmaker to 21.7% as U.S. drugmaker ⁠Pfizer exits ‌its 11.7% shareholding.

Under the agreement, Pfizer will receive $1.88 billion ‍for its 11.7% holding, and GSK will get a special dividend of $250 ​million as ViiV cancels the ‌U.S. drugmaker’s shares.

GSK will retain its 78.3% majority stake in ViiV Healthcare. The British firm established ViiV Healthcare with Pfizer in ⁠2009, with Shionogi ​joining as a shareholder ​in 2012.

The deal streamlines ownership of ViiV Healthcare at ‍a time ⁠when the company is advancing a pipeline of long-acting injectable ⁠HIV treatments and prevention medicines.

(Reporting by ‌Yadarisa Shabong in Bengaluru; Editing ‌by Rashmi Aich)