Shire offered US$64 (47.32 EUR) per share, or approximately US$2.6 billion (1.92 billion EUR), for New River in February.
"Consummation of the tender offer now remains subject only to certain customary conditions," the company said in a statement.
The tender offer will expire on Tuesday.
Shire shares gained 0.1 percent to 64.28 pence (US$1.27; 0.94 EUR) on the London Stock Exchange.
Russian Finance Minister Anton Siluanov announced a possible move that Russia can take in response to new US sanctions
When the bill was submitted to Congress on August 2, the reason for imposing the new sanctions on Russia was based on Russia's alleged interference in the US presidential election in 2016, but then something clicked
The Central Bank of Turkey announced measures to protect the financial market of Turkey against the background of the collapse of the Turkish lira and conflict of interests with the United States of America