Business services companies established in 1923

Ecolab Inc. is an American corporation headquartered in Saint Paul, Minnesota. It develops and offers services, technology and systems that specialize in treatment, purification, cleaning and hygiene of water in a wide variety of applications. Founded as Economics Laboratory in 1923 by Merritt J. Osborn, it was eventually renamed "Ecolab" in 1986.

Nielsen Holdings plc (or Nielsen) is an American media audience measurement firm. Nielsen operates in over 100 countries and employs approximately 15,000 people worldwide.

NIQ (also known as NielsenIQ, formerly known as ACNielsen or AC Nielsen) is a global marketing research firm, with worldwide headquarters in Chicago, United States. The company has approximately 30,000 employees and operates in more than 100 countries. NIQ acquired German market research firm GfK in 2023.

John Shorter Pty Ltd, commonly known as Shorters, was an Australian manufacturers’ importing agency company, best known as the Australasian agent for the British ceramics firms Royal Doulton and Mintons. John Shorter Pty Ltd remained the Doulton agents in Australia until 1979, when Royal Doulton Australia was established. The family and business were, through two generations, major donors to the Museum of Applied Arts & Sciences in Sydney.

Interflora is a flower delivery network, associated with over 58,000 affiliated flower shops in over 140 countries. It is a subsidiary of Teleflora, a subsidiary of The Wonderful Company.

Harte Hanks is a global marketing services company headquartered in Boston, Massachusetts. Harte Hanks services include analytics, strategy, marketing technology, creative services, digital marketing, customer care, direct mail, logistics, and fulfillment.

BayWa AG (until 1972: Bayerische Warenvermittlung landwirtschaftlicher Genossenschaften AG) is an internationally active group headquartered in Munich, Germany. Originally founded to support domestic agriculture, the company expanded its activities to the construction and energy sectors. BayWa is represented in more than 50 countries through its subsidiaries and holdings. The shareholder structure is still determined by the cooperative sector, which has shaped the corporate culture since its founding.

Valaris Limited (previously ENSCO-Rowan plc) is an offshore drilling contractor headquartered in Houston, Texas, and incorporated in Bermuda. It is the largest offshore drilling and well drilling company in the world, and owns 52 rigs, including 36 offshore jackup rigs, 11 drillships, and 5 semi-submersible platform drilling rigs.