David Hannah McClelland

Sigma Aldrich Co. Ltd. engages in the science and technology company. Its products include analytical standards, gas chromatography, spectroscopy, acids and bases, catalysis and inorganics, organometallics, solvents, antibodies, biochemical and reagents, cell biology, microbiology, and polymer sciences. It also offers basic research, product and process development, manufacturing and production, and regulatory compliance services. The company was founded on December 10, 1987 and is headquartered in Gillingham, the United Kingdom.

Merck Serono Ltd. provides research and development services and manufactures medicinal drugs. The company is headquartered in Middlesex, the United Kingdom.

Ultrafine Ltd. researches and develops chemical compounds. The company was founded on March 12, 2004 and is headquartered in Gillingham, the United Kingdom.

Part of Merck KGaA, Millipore (U.K.) Ltd. is a British company that develops, manufactures, and supplies separation products, monoclonal antibodies, and bio-reagents for the pharmaceutical industry. The company is based in Middlesex, UK and was founded in 2000.

Part of Procter & Gamble Co., Procter & Gamble Health Ltd. is a holding company based in Weybridge, UK. Founded in 1979, the British company's subsidiaries provide management services.

Founded in 1996, SAFC Biosciences Ltd. is a British chemical product manufacturing company that is part of Merck KGaA. The company is based in Gillingham, UK.

Part of Merck KGaA, SAFC Hitech Ltd. is a British company that wholesales chemical products. The company is based in Gillingham, UK.

Founded in 1960, Merck Life Science UK Ltd. is a subsidiary of Merck KGaA. The company is based in Gillingham, UK. The British company provides advanced chemical materials for the manufacturing of LCD panels.

Part of Procter & Gamble Co., Lamberts Healthcare Ltd. is a leading supplier of vitamins, supplements, minerals, and nutritional supplements. The company was founded in 1982 and is based in Tunbridge Wells, UK. Lamberts ensures the quality of its products by including a best before end (BBE) date on all labels, which is based on extensive testing and supported by valid scientific rationale. The products maintain the nutrient levels detailed on the label until the BBE date, with a few percent difference permitted each way. Although supplements rarely become unsafe after the BBE date, they may become less potent due to the natural process of nutrient degradation.

Founded in 1935, Seven Seas Ltd. is a subsidiary of Procter & Gamble Co. specializing in the manufacture and marketing of vitamin supplements and health care products. The company is based in Weybridge, UK.

Part of Merck KGaA, Merck Performance Materials Services UK Ltd. is a company that provides investment services. The company is based in Middlesex, UK and was founded in 2004.

Part of Merck KGaA, Epichem Group Ltd. is a British company that produces and distributes biochemical and organic chemical products. The company is based in Gillingham, UK. The company was founded in 1989. Epichem Group was acquired by Sigma-Aldrich Corp., part of Merck KGaA from November 19, 2015 on February 12, 2007 for $60.03 million.

Part of Merck KGaA, Merck Holding Ltd. functions as an investment holding British company. The company is based in Feltham, UK and was founded in 2013.