Directory Inc.

ManpowerGroup (formerly known as Manpower Inc.) is a Fortune 500 American multinational corporation headquartered in Milwaukee, Wisconsin. Founded in 1948 by Elmer Winter and Aaron Scheinfeld, ManpowerGroup is the third-largest staffing firm in the world behind Swiss firm Adecco and Dutch firm Randstad.[9] The company provides administrative & support services, professional services, and business services through its four primary brands: Manpower (contingent staffing & permanent recruitment), Experis (professional resourcing and project-based solutions[buzzword]), Right Management (career management, workforce consulting, and training & development), and ManpowerGroup Solutions (managed services and outsourcing).

Marathon Petroleum Corporation is an American petroleum refining, marketing, and transportation company headquartered in Findlay, Ohio. The company was a wholly owned subsidiary of Marathon Oil until a corporate spin-off in 2011. Following its acquisition of Andeavor on October 1, 2018, Marathon Petroleum became the largest petroleum refinery operator in the United States, with 16 refineries and over 3 million barrels per day of refining capacity.[2] Marathon Petroleum ranked No. 41 on the 2018 Fortune 500 list of the largest United States corporations by total revenue.

Marriott International is an American multinational diversified hospitality company that manages and franchises a broad portfolio of hotels and related lodging facilities. Founded by J. Willard Marriott, the company is now led by his son, Executive Chairman Bill Marriott, and President and Chief Executive Officer Arne Sorenson. Marriott International is the third largest hotel chain in the world.[3] It has 30 brands with 7,003 properties in 131 countries and territories around the world,[1][2][4] over 1,332,826 rooms (as of March 31, 2019),[1] including 2,035 that are managed with 559,569 rooms, 4,905 that are franchised or licensed with 756,156 rooms, and 63 that are owned or leased with 17,101 rooms,[1] plus an additional 475,000 rooms in the development pipeline and an additional 25,000 rooms approved for development but not yet under signed contracts.[1][5][6][7] It is headquartered in Bethesda, Maryland, in the Washington, D.C. metropolitan area.[8] In 2017, Marriott was ranked #33 on Fortune's "100 Best Companies to Work For" list, its twentieth appearance on the list.

Masco Corporation is a manufacturer of products for the home improvement and new home construction markets. Comprising more than 20 companies, the Masco conglomerate operates nearly 60 manufacturing facilities in the United States and over 20 in other parts of the world. Since 1969 it trades on the NYSE. Under the leadership of Richard Manoogian, the company grew exponentially and subsequently joined the Fortune 500 list of largest U.S. corporations. As of 2007, Masco employed approximately 32,500 employees and has approximately 6,000 shareholders. The company is currently ranked at 373 on the Fortune 500. As of December 31, 2007, Masco had a little over ten billion dollars in assets, and the company’s total revenue was $11.77 billion. Total sales for the company in 2009 were 7.8 billion. In 2010, the company had worldwide sales of $7.6 billion and approximately 90 manufacturing facilities. The current CEO is Keith J. Allman.

Mastercard Incorporated (stylized as MasterCard from 1979 to 2016 and mastercard from 2016) is an American multinational financial services corporation headquartered in the Mastercard International Global Headquarters in Purchase, New York, United States. The Global Operations Headquarters is located in O'Fallon, Missouri, United States, a municipality of St. Charles County, Missouri. Throughout the world, its principal business is to process payments between the banks of merchants and the card issuing banks or credit unions of the purchasers who use the "Mastercard" brand debit, credit and prepaid to make purchases. Mastercard Worldwide has been a publicly traded company since 2006. Prior to its initial public offering, Mastercard Worldwide was a cooperative owned by the more than 25,000 financial institutions that issue its branded cards. Mastercard, originally known as "Interbank" from 1966 to 1969 and "Master Charge" from 1969 to 1979, was created by an alliance of several regional bankcard associations in response to the BankAmericard issued by Bank of America, which later became the Visa credit card issued by Visa Inc.

McDonald's Corporation is an American fast food company, founded in 1940 as a restaurant operated by Richard and Maurice McDonald, in San Bernardino, California, United States. They rechristened their business as a hamburger stand, and later turned the company into a franchise, with the Golden Arches logo being introduced in 1953 at a location in Phoenix, Arizona. In 1955, Ray Kroc, a businessman, joined the company as a franchise agent and proceeded to purchase the chain from the McDonald brothers. McDonald's had its original headquarters in Oak Brook, Illinois, but moved its global headquarters to Chicago in early 2018.[5][6][7] McDonald's is the world's largest restaurant chain by revenue,[8] serving over 69 million customers daily in over 100 countries[9] across 37,855 outlets as of 2018.[10][11] Although McDonald's is best known for its hamburgers, cheeseburgers and french fries, they also feature chicken products, breakfast items, soft drinks, milkshakes, wraps, and desserts. In response to changing consumer tastes and a negative backlash because of the unhealthiness of their food,[12] the company has added to its menu salads, fish, smoothies, and fruit. The McDonald's Corporation revenues come from the rent, royalties, and fees paid by the franchisees, as well as sales in company-operated restaurants. According to two reports published in 2018, McDonald's is the world's second-largest private employer with 1.7 million employees (behind Walmart with 2.3 million employees).

Merck & Co., Inc., d.b.a. Merck Sharp & Dohme (MSD) outside the United States and Canada, is an American multinational pharmaceutical company and one of the largest pharmaceutical companies in the world. Merck is incorporated in New Jersey. [4] The company was established in 1891 as the United States subsidiary of the German company Merck, which was founded in 1668 by the Merck family. Merck & Co. was expropriated by the US government during World War I and subsequently established as an independent American company in 1917. While it operates as Merck & Co. in North America, the original Merck based in Darmstadt holds the rights to the Merck name everywhere else. Merck & Co. is the world's seventh largest pharmaceutical company by market capitalization and revenue. Its headquarters is located in Kenilworth, New Jersey.[5] The company ranked No. 78 in the 2018 Fortune 500 list of the largest United States corporations by total revenue.[6] Merck & Co. publishes The Merck Manuals, a series of medical reference books for physicians, nurses, technicians, and veterinarians. These include the Merck Manual of Diagnosis and Therapy, the world's best-selling medical reference. The Merck Index, a compendium of chemical compounds, was formerly published by Merck & Co. before being acquired by the Royal Society of Chemistry in 2012.

MGM Resorts International is an American global hospitality and entertainment company operating destination resorts in Las Vegas, Detroit, Mississippi, Maryland, and New Jersey, including Bellagio, Mandalay Bay, MGM Grand, and Park MGM. In January 2019 the company took over Empire City Casino in Yonkers, NY and also recently opened MGM National Harbor in Maryland and MGM Springfield in Massachusetts. It has a majority interest in MGM China Holdings Limited, which owns the MGM Macau resort and casino, and is developing a gaming resort in Cotai. MGM Resorts owns 50 percent of CityCenter in Las Vegas, which features Aria Resort & Casino. It has a majority controlling interest in MGM Growth Properties, a real estate investment trust. The company began operations in 1987 as MGM Grand, Inc. and became MGM Mirage in 2000, after acquiring Mirage Resorts.

Microsoft Corporation is an American multinational technology company with headquarters in Redmond, Washington. It develops, manufactures, licenses, supports, and sells computer software, consumer electronics, personal computers, and related services. Its best known software products are the Microsoft Windows line of operating systems, the Microsoft Office suite, and the Internet Explorer and Edge Web browsers. Its flagship hardware products are the Xbox video game consoles and the Microsoft Surface lineup of touchscreen personal computers. As of 2016, it is the world's largest software maker by revenue,[3] and one of the world's most valuable companies.[4] The word "Microsoft" is a portmanteau of "microcomputer" and "software".[5] Microsoft is ranked No. 30 in the 2018 Fortune 500 rankings of the largest United States corporations by total revenue.[6] Microsoft was founded by Bill Gates and Paul Allen on April 4, 1975, to develop and sell BASIC interpreters for the Altair 8800. It rose to dominate the personal computer operating system market with MS-DOS in the mid-1980s, followed by Microsoft Windows. The company's 1986 initial public offering (IPO), and subsequent rise in its share price, created three billionaires and an estimated 12,000 millionaires among Microsoft employees. Since the 1990s, it has increasingly diversified from the operating system market and has made a number of corporate acquisitions, their largest being the acquisition of LinkedIn for $26.2 billion in December 2016,[7] followed by their acquisition of Skype Technologies for $8.5 billion in May 2011.[8] As of 2015, Microsoft is market-dominant in the IBM PC compatible operating system market and the office software suite market, although it has lost the majority of the overall operating system market to Android.[9] The company also produces a wide range of other consumer and enterprise software for desktops, laptops, tabs, gadgets, and servers, including Internet search (with Bing), the digital services market (through MSN), mixed reality (HoloLens), cloud computing (Azure), and software development (Visual Studio). Steve Ballmer replaced Gates as CEO in 2000, and later envisioned a "devices and services" strategy.[10] This unfolded with Microsoft acquiring Danger Inc. in 2008,[11] entering the personal computer production market for the first time in June 2012 with the launch of the Microsoft Surface line of tablet computers, and later forming Microsoft Mobile through the acquisition of Nokia's devices and services division. Since Satya Nadella took over as CEO in 2014, the company has scaled back on hardware and has instead focused on cloud computing, a move that helped the company's shares reach its highest value since December 1999.[12][13] In 2018, Microsoft surpassed Apple Inc. as the most valuable publicly traded company in the world after being dethroned by the tech giant in 2010.[14] In April 2019, Microsoft reached the trillion-dollar market cap, becoming the third U.S. public company to be valued at over $1 trillion after Apple and Amazon respectively.

Molina Healthcare is a managed care company headquartered in Long Beach, California, United States. The company provides health insurance to individuals through government programs such as Medicaid and Medicare.