
Bally Manufacturing, later renamed Bally Entertainment, was an American company that began as a pinball and slot machine manufacturer, and later expanded into casinos, video games, health clubs, and theme parks. It was acquired by Hilton Hotels in 1996. Its brand name, and mid-20th century pinball & slot machine logo, are still used by several businesses with some trademark rights, most notably Bally Technologies and Bally's Corporation.

Bally Technologies, Inc. is an American manufacturer of slot machines and other gambling technology based in Enterprise, Nevada. It is owned by Scientific Games Corporation.
Finland's Slot Machine Association or RAY was a government-supervised and -owned nonprofit gaming (gambling) association in Finland. On January 1, 2017 RAY merged with the government-supervised and -owned nonprofit betting agency Veikkaus and Fintoto. The new company that was founded as a result is also called "Veikkaus". RAY was a gambling monopoly whose proceedings went to domestic charity such as pensioner care and gambling addiction treatment. While RAY was best known for its slot machines, the company also dealt in online gambling and controlled the only official casino in Finland, Casino Helsinki.

International Game Technology (IGT) was an American gaming company based in Las Vegas that manufactured and distributed slot machines and other gaming technology. It was acquired in 2015 by Gtech, which then adopted the IGT name for itself.

Jennings & Company was a leading manufacturer of slot machines in the United States and also manufactured other coin-operated machines, including pinball machines, from 1906 to the 1980s. It was founded by Ode D. Jennings as Industry Novelty Company, Incorporated of Chicago. On the death of its founder in 1953, the company was succeeded by Jennings & Company.

Konami Holdings Corporation is a Japanese entertainment conglomerate and video game company. In addition to being a video game developer and publisher, it also produces and distributes trading cards, anime, tokusatsu, pachinko machines, slot machines, and arcade cabinets. Konami has casinos around the world and operates health and physical fitness clubs across Japan.
NewGin Co. Ltd. is a privately owned Japanese manufacturer of pachinko and pachislot machines incorporated in May 1968 in Nagoya, Japan. The company slogan is "Serious Play" .

Ortiz Gaming is a multinational company specializing in Class II and Class III video bingo slot machines.

Scientific Games Corporation is an American corporation that provides gambling products and services to lottery and gambling organizations across the globe. The company is headquartered in Las Vegas, Nevada with lottery headquarters and production plant in Alpharetta, Georgia. Its products include computerized and mechanical slot machines, table game theme copyrights, electronic card shufflers, instant lottery games, lottery gaming systems, terminals and services, internet applications, server-based interactive gambling terminals, gambling control systems, social gaming, and sports betting.

Universal Entertainment Corporation, formerly known as Aruze Corporation , is a Japanese manufacturer of pachinko, slot machines, arcade games and other gaming products, and a publisher of video games. Aruze possesses licenses to both manufacture and distribute casino machines in the American states of Nevada, Mississippi and New Jersey. The company's corporate headquarters are in Tokyo. Aruze is also the licence holder of the video game franchise Shadow Hearts. Up until February 18, 2012, the company owned approximately 21% of Wynn Resorts. On November 1, 2009, Aruze Corporation changed its name to Universal Entertainment Corporation due to financial difficulties.

WMS Industries, Inc. is an American electronic gaming and amusement manufacturer in Enterprise, Nevada. It was merged into Scientific Games in 2016. WMS's predecessor was the Williams Manufacturing Company, founded in 1943 by Harry E. Williams. However, the company that became WMS Industries was formally founded in 1974 as Williams Electronics, Inc.