Best fortune 500 companies in Washington, DC

AmTrust Financial Services, Inc., is a New York City-based multinational property and casualty insurance company, offering workers' compensation, general liability, business owners policies, cyber liability, EPLI and more.

For more than 100 years, business, government, and military leaders have turned to Booz Allen Hamilton to solve their most complex problems. They trust us to bring together the right minds: those who devote themselves to the challenge at hand, who speak with relentless candor, and who act with courage and character. They expect original solutions where there are no roadmaps. They rely on us because they know that—together—we will find the answers and change the world.

A biotechnology innovator since 1980, Amgen has grown to be one of the world's leading independent biotechnology companies, has reached millions of patients around the world and is developing a pipeline of medicines with breakaway potential. Amgen focuses on areas of high unmet medical need and leverages its expertise to strive for solutions that improve health outcomes and dramatically improve people's lives. Amgen is committed to unlocking the potential of biology for patients suffering from serious illnesses by discovering, developing, manufacturing and delivering innovative human therapeutics. This approach begins by using tools like advanced human genetics to unravel the complexities of disease and understand the fundamentals of human biology. Our belief—and the core of our strategy—is that innovative, highly differentiated medicines that provide large clinical benefits in addressing serious diseases are medicines that will not only help patients, but also will help reduce the social and economic burden of disease in society today.

Exelon Corporation is an American energy producer, trader, and distributor. The company provides services for energy generation businesses in the United States. The company owns, contracts, and invests in electric generating facilities such as nuclear, fossil, and hydroelectric generation facilities, as well as wind and solar facilities. It is also involved in the wholesale and retail customer supply of electric and natural gas products and services including renewable energy products, risk management services, natural gas exploration, and production activities. In addition, the company is engaged in the purchase and regulated retail sale of electricity and the provision of distribution and transmission services in northern Illinois, southeastern Pennsylvania, and central Maryland. It is also involved in the purchase and regulated retail sale of natural gases and the provision of distribution services in the Pennsylvania counties surrounding the City of Philadelphia, as well as in central Maryland including the City of Baltimore. Exelon Corporation operates through nine segments: Mid-Atlantic, Midwest, New England, New York, ERCOT, other regions, ComEd, PECO, and BGE. It sells electricity, natural gases, and other related products and solutions to various customers including distribution utilities, municipalities, and cooperatives, as well as to commercial, industrial, governmental, and residential customers. Founded in 1887, Exelon Corporation is headquartered in Chicago, Illinois.

American Tower Corporation is a holding company. The company conducts its operations through its directly and indirectly owned subsidiaries and joint ventures. It is a wireless and broadcast communications infrastructure company that owns, operates and develops communications sites. Its primary business includes leasing antenna space on multi-tenant communications sites to wireless service providers, radio and television broadcast companies, wireless data providers, government agencies and municipalities and tenants in a number of other industries. This business is its rental and management operations. It also offer tower-related services domestically, including site acquisition, zoning and permitting services and structural analysis services, which primarily support its site leasing business and the addition of new tenants and equipment on its sites. In January 2012, the Company merged with and into American Tower REIT, Inc.

Dell is transforming computing and providing high quality solutions that empower people to do more all over the world.

Vistra Energy is a premier Texas-based energy company focused on the competitive energy and power generation markets through operation as the largest retailer and generator of electricity in the growing Texas market. Our integrated portfolio of competitive businesses consists primarily of TXU Energy and Luminant. TXU Energy sells retail electricity and value-added services (primarily through our market-leading TXU Energy™ brand) to approximately 1.7 million residential and business customers in Texas. Luminant generates and sells electricity and related products from our diverse fleet of generation facilities totaling approximately 18,000 MW of generation in Texas, including 2,300 MW fueled by nuclear power, 8,000 MW fueled by coal and 7,500 MW fueled by natural gas, and is a large purchaser of renewable power including wind and solar-generated electricity.

Established in 1989, Laser Concepts has earned a reputation for excellence as a service provider and offers exceptionally high-quality products. They provide inks, printers, fax machines, and copiers, to name a few. Aside from production, they also offer services.

Salesforce is the Customer Success Platform that, along with social and mobile cloud technologies such as flagship sales and CRM applications, helps companies connect with customers, partners, and employees. Its innovative cloud-based platform and great customer service helped Salesforce become the world's fourth-largest software company. The company was founded in 1999 and is based in San Francisco, CA.

Lockheed Martin Corporation is a global security company engaged in the research, design, development, manufacture, integration, and sustainment of advanced technology systems and products. It also provides a range of management, engineering, technical, scientific, logistic, and information services. The Company operates in four business segments: Aeronautics, Electronic Systems, Information Systems & Global Services, and Space Systems. Lockheed Martin was formed in 1995 from the merger of Lockheed Corporation and Martin Marietta. In September 2008, Lockheed Martin Corporation acquired Aculight Corporation. In January 2009, it completed its acquisition of Universal Systems & Technology, Inc. (UNITECH). In August 2009, it completed its acquisition of Gyrocam Systems LLC (Gyrocam). Gyrocam develops and supplies gyrostabilized optical surveillance systems and sustainment field services, principally to the United States military. Lockheed Martin Missiles and Fire Control, a unit of the Company's Electronic Systems business area, would manage the Gyrocam business.

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Microsoft is an American multinational corporation that develops, manufactures, licenses, supports, and sells a range of software products and services. Microsoft's devices and consumer (D&C) licensing segment licenses Windows operating system and related software; Microsoft Office for consumers; and Windows Phone operating system. The company's computing and gaming hardware segment provides Xbox gaming and entertainment consoles and accessories, second-party and third-party video games, and Xbox Live subscriptions; surface devices and accessories; and Microsoft PC accessories. Its phone hardware segment offers Lumia smartphones and other non-Lumia phones. Its D&C other segment provides Windows Store, Xbox Live transactions, and Windows phone store; search advertising; display advertising; Office 365 Home and Office 365 Personal; first-party video games; and other consumer products and services as well as operating retail stores. Microsoft's commercial licensing segments licenses server products, including Windows Server, Microsoft SQL Server, Visual Studio, System Center, and related Client Access Licenses (CALs); Windows Embedded; Windows operating system; Microsoft Office for business, including Office, Exchange, SharePoint, Lync, and related CALs; Microsoft Dynamics business solutions; and Skype. Its commercial other segment offers enterprise services, including premier support services and Microsoft consulting services; commercial cloud comprising Office 365 Commercial, other Microsoft Office online offerings, Dynamics CRM Online, and Microsoft Azure; and other commercial products and online services. The company markets and distributes its products through original equipment manufacturers, distributors, and resellers, as well as online. Microsoft Corporation was founded by Bill Gates and Paul Allen in 1974. It is based in Redmond, Washington.

Humana Inc., headquartered in Louisville, Kentucky, is a leading health care company that offers a wide range of insurance products and health and wellness services that incorporate an integrated approach to lifelong well-being. Since Humana's establishment in 1961, the company's main purpose has been to support people in their daily endeavors to live a healthy life, create innovative programs and partnerships that reflect the company's commitment.

The Goldman Sachs Group, Inc. provides investment banking, securities, and investment management services, as well as financial services to corporations, financial institutions, governments, and high-net-worth individuals worldwide. Its Investment Banking segment offers financial advisory services, including advisory assignments with respect to mergers and acquisitions, divestitures, corporate defense, risk management, and restructurings and spin-offs; and underwriting services comprising public offerings and private placements of a range of securities, loans and other financial instruments, and derivative transactions. The company's Institutional Client Services segment provides client execution services, such as fixed income, currency, and commodities client execution related to making markets in interest rate products, credit products, mortgages, currencies, and commodities; and equities related to making markets in equity products, as well as executes and clears institutional client transactions on stock, options, and futures exchanges. This segment also engages in securities services business providing financing, securities lending, and other brokerage services to institutional clients, including hedge funds, mutual funds, pension funds, and foundations. Its Investing and Lending segment originates longer-term loans; and invests in debt securities, loans, public and private equity securities, real estate, consolidated investment entities, distressed assets, currencies, commodities, and power generation facilities. The company's Investment Management segment provides investment products and services, as well as offers wealth advisory services, including portfolio management and financial counseling, and brokerage and other transaction services. The Goldman Sachs Group, Inc. was founded in 1869 and is headquartered in New York, New York.

JPMorgan Chase & Co. is an American multinational investment bank and financial services holding company headquartered in New York City.

Facebook is an online social networking service that allows its users to connect with friends and family as well as make new connections. It provides its users with the ability to create a profile, update information, add images, send friend requests, and accept requests from other users. Its features include status update, photo tagging and sharing, and more. Facebook's profile structure includes a timeline, information related to the user, images of the user, images added by friends of the user, notes, pages, groups, and more. It enables its users to create pages related to entertainment, sports, business, finance, preferences, hobbies, culture, religion, causes, organizations, and a number of other categories. It also enables its users to join or create groups related to a vast number of categories. With millions of more users, Friendster attempted to acquire the company for $10 million in mid-2004. Facebook turned down the offer and subsequently received $12.7 million in funding from Accel Partners at a valuation of around $100 million. Facebook continued to grow opening up to high school students in September 2005 and adding a photo sharing feature the next month. The next spring, Facebook received $25 million in funding from Greylock Partners and Meritech Capital as well as previous investors Accel Partners and Peter Thiel . The pre-money valuation for this deal was about $525 million. Facebook subsequently opened up to work networks eventually amassing over 20,000 work networks. Finally in September 2006, Facebook was opened to anyone with an email address. Facebook continued to receive funding most notably in January 2011 receiving $1.5 billion and valuing the company at $50 billion. A year later in February 2012, Facebook announced that it was filing for its long-anticipated initial public offering. The company went public on May 18, 2012 opening in NASDAQ with shares trading at $42.05. Facebook announced positive numbers in February 2012 upon filing for its IPO. As of July 2013 over 1.15 billion users have logged into Facebook every month and 669 million users daily. Mobile users now make up half of Facebook's user base with 819 million monthly actives. Facebook is one of the most trafficked sites in the United States. Additionally, Facebook is the top photo sharing site with 250 million photos uploaded per day. The company has strategic partnership with AXA Group to develop marketing and commercial collaboration in the digital, social, and mobile sphere. Facebook is currently the owner of many applications and services such as Pagemodo Pagebuilder, RSS Graffiti , Huddle, and more. It is the world's largest social network with over 1.32 billion monthly active users. Facebook was founded by Mark Zuckerberg on February 4, 2004 in Menlo Park, California.

Jones Lang LaSalle is a financial and professional services firm that specializes in commercial real estate services and investment management. Its services include: tenant representation for organizations that lease office, industrial and retail spaces; consulting, which supports companies to develop workplace strategies such as occupancy planning, relocations, and energy and environmental sustainability initiatives; project and development services to manage ground-up creation, building construction, and major interior renovations; capital markets and real estate investment banking, which helps organizations buy and sell properties, and improve the financial impact of their real estate; facilities management for a variety of properties including office towers, retail and exhibition centers, and government, collegiate and industrial complexes; property management services, that provide on-site administration to help owners of office, industrial, retail and specialty properties reduce costs and enhance their property values; and valuations that provide impartial assessments of real estate worth through more than 200 corporate offices in 70 countries. Jones Lang LaSalle was formed by the merger of Jones Lang Wootton, a British firm with origins dating back to 1783, and LaSalle Partners, an American company formed from a predecessor launched in 1968. Jones Lang Wootton opened its first US office in New York in 1975. In 1997, the initial public offering was completed by LaSalle Partners for the company's common stock in the market.

Ball Corporation is headquartered in Broomfield, Colorado. They manufacture metal packaging for beverage, food and household products. The also provide aerospace and other technologies for commercial and government customers.

The Intercontinental Exchange is an American Fortune 500 company formed in 2000 that operates global exchanges, clearing houses and provides mortgage technology, data and listing services.