Tranche Update on Quest Diagnostics Incorporated's Equity Buyback Plan announced on October 20, 2010.

GSK plc is a global biopharma company. The Company’s segments include Commercial Operations and Research and Development. It develops cancer medicines for patients, including ovarian cancer, endometrial cancer, and multiple myeloma. It has developed monoclonal antibodies to help treat different diseases. Its product areas include vaccines, specialty medicines, and general medicine. It is also focused on addressing the unmet treatment needs of patients with respiratory and inflammatory conditions. Its vaccine portfolio includes more than 20 vaccines that help to protect people from a range of diseases and infections, including meningitis, shingles and flu, among others. Its specialty medicines include medicines for immune-mediated conditions. Its specialty medicines are also engaged in developing medicines for respiratory disease and HIV. Its general medicines include inhaled medicines for asthma and chronic obstructive pulmonary disease, antibiotics, and medicines for skin diseases.