GlaxoSmithKline (NYSE and LSE: GSK) and Genmab A/S (OMX: GEN) announced today an amendment to the ofatumumab co-development and commercialisation agreement. Under the terms of the amendment, GSK will take responsibility for developing ofatumumab in autoimmune indications whilst continuing to jointly develop ofatumumab with Genmab in oncology indications.

Genmab will receive an upfront payment of GBP 90 million (DKK 815 million) from GSK. Genmab's future funding commitment for the development of ofatumumab in oncology indications will be capped at a total of GBP 145 million (DKK 1,314 million), including a yearly spending cap of GBP 17 million (DKK 154 million) for each of the next six years starting with 2010. Future milestones due to Genmab under the oncology development programme will be reduced by 50%. There will be no change in royalty tiers to Genmab in the oncology programme.

GSK is currently planning a number of Phase II clinical studies to take ofatumumab forward in autoimmune indications. "Autoimmune diseases represent an area of high unmet medical need. GSK's growing biopharmaceutical capabilities coupled with our deep therapy area expertise will greatly facilitate the development of ofatumumab in these indications," said Ian Tomlinson, Senior Vice President, Biopharmaceutical R&D, GSK. GSK will be solely responsible for funding the development in these indications. As a result, Genmab will forego development milestones for autoimmune indications and the first two sales milestones while retaining a double digit royalty on sales.

"The amendment to the ofatumumab agreement clearly highlights Genmab and GSK's commitment to further develop this important product," said Prof. Jan G.J. van de Winkel, Ph.D., Chief Executive Officer Genmab. "We have a really excellent partner in GSK. Their flexibility has allowed us to not only ensure that we extract the best possible value from ofatumumab, but also strengthen the financial security of Genmab."

The amendment to the ofatumumab agreement is expected to have a material impact on Genmab's 2010 financial guidance which will be updated with the company's second quarter report on 17 August 2010.

The financial terms of the amendment to the ofatumumab co-development and commercialisation agreement are denominated in British Pounds (GBP). Solely for the convenience of the reader, this press release contains a conversion of such GBP amounts into Danish Kroner (DKK) using the Danish Central Bank closing rate on 1 July 2010 which was GBP 1.00 = DKK 9.0600.

GlaxoSmithKline – one of the world's leading research-based pharmaceutical and healthcare companies – is committed to improving the quality of human life by enabling people to do more, feel better and live longer.

Genmab A/S - is a leading international biotechnology company focused on developing fully human antibody therapeutics for the potential treatment of cancer. Genmab's world class discovery and development teams are using cutting-edge technology to create and develop products to address unmet medical needs. Our primary goal is to improve the lives of patients who are in urgent need of new treatment options.

GlaxoSmithKline Cautionary statement regarding forward-looking statements

Under the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995, GSK cautions investors that any forward-looking statements or projections made by GSK, including those made in this announcement, are subject to risks and uncertainties that may cause actual results to differ materially from those projected. Factors that may affect GSK' s operations are described under 'Risk Factors' in the 'Business Review' in the company' s Annual Report on Form 20-F for 2009.

Genmab Forward Looking Statement

This Stock Exchange Release contains forward looking statements. The words "believe", "expect", "anticipate", "intend" and "plan" and similar expressions identify forward looking statements. Actual results or performance may differ materially from any future results or performance expressed or implied by such statements. The important factors that could cause our actual results or performance to differ materially include, among others, risks associated with product discovery and development, uncertainties related to the outcome and conduct of clinical trials including unforeseen safety issues, uncertainties related to product manufacturing, the lack of market acceptance of our products, our inability to manage growth, the competitive environment in relation to our business area and markets, our inability to attract and retain suitably qualified personnel, the unenforceability or lack of protection of our patents and proprietary rights, our relationships with affiliated entities, changes and developments in technology which may render our products obsolete, and other factors. For a further discussion of these risks, please refer to the section "Risk Management" in Genmab's Annual Report, which is available on website. Genmab does not undertake any obligation to update or revise forward looking statements in this Stock Exchange Release nor to confirm such statements in relation to actual results, unless required by law.

Source: GlaxoSmithKline plc

Press Releases

GlaxoSmithKline and Genmab Announce Amendment to Ofatumumab Agreement

London and Denmark Jul 1, 2010

London and Denmark
Jul 1, 2010