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Yelp Inc. is an American company that develops the Yelp.com website and the Yelp mobile app, which publishes crowd-sourced reviews about businesses. It also operates Yelp Guest Manager, a table reservation service. It is headquartered in San Francisco.
Yelp said ReviewVio's ads, which include the Yelp logo, harmed its reputation by suggesting that businesses could pay fo Yelp can sue reputation company for promising to suppress bad reviews Skip ...
ULMA Construction is a Spanish company that produces and distributes industrialized formwork and scaffolding systems for building, civil works, and rehabilitation. Ulma is operating in 80 countries on five continents through the rental and sale of its services and products, technical project development, and on-site consultancy.
John Albert Overdeck (born 1969) is an American hedge fund manager.Overdeck is the co-founder and co-chairman of Two Sigma Investments, a New York City-based hedge fund that uses a variety of technological methods, including artificial intelligence, machine learning, and distributed computing, for its trading strategies.
Sigma-Aldrich was created in 1975 by the merger of Sigma Chemical Company and Aldrich Chemical Company. It grew through various acquisitions until it had over 9,600 employees and was listed on the Fortune 1000. The company has two United States headquarters, in St. Louis and Burlington, MA and has operations in approximately 40 countries. [7]
In 2019, the company had over 38,000 employees. [7] Brookfield Business Partners bought 45% of the company in September 2019. BrandSafway was valued at $6.7 billion at the time of the purchase. [8] The company is often contracted to provide safety equipment for complicated jobs.
Two Sigma Investments was founded in 2001 by John Overdeck, David Siegel and Mark Pickard. [2] [5] Siegel is a computer science Ph.D. from the Massachusetts Institute of Technology who worked for Tudor Investments, and Overdeck is an International Mathematical Olympiad Silver Medalist who subsequently studied mathematics at Stanford University and worked for Jeff Bezos in Amazon.com's early ...
Sigma Guitars is a guitar manufacturing brand originally released by C.F. Martin as a line of guitars at affordable prices to compete with the increasing number of imported guitars from Japan and elsewhere. The Sigma line was discontinued by Martin in 2007.