Britain’s GlaxoSmithKline has asked its shareholders to vote at a meeting on December 18 on its proposed major deal with Switzerland’s Novartis, which will see the two pharmaceutical group trade more than $20 billion of assets.

The transaction, which includes GSK buying Novartis’ vaccines business, Novartis purchasing GSK’s cancer drugs, and the two groups tying up in consumer healthcare, was unveiled in April.

In a letter to shareholders endorsing the deal, GSK’s chairman Christopher Gent said approval would strengthen its franchises in vaccines and consumer healthcare to complement its leading position in respiratory and HIV.

“This is the most significant transaction for the company since the creation of GlaxoSmithKline in 2000,” he said.

Sign up to our free newsletters

Get the best updates straight to your inbox:
Please select at least one mailing list.

You can unsubscribe at any time by clicking the link in the footer of our emails. We use Mailchimp as our marketing platform. By subscribing, you acknowledge that your information will be transferred to Mailchimp for processing.