In this report, we use the terms "the Company," "we," "us" and "our" to refer to AECOM and its consolidated subsidiaries. Unless otherwise noted, references to years are for fiscal years. Our fiscal year consists of 52 or 53 weeks, ending on the Friday closest to September 30. For clarity of presentation, we present all periods as if the year ended on September 30. We refer to the fiscal year ended September 30, 2018 as "fiscal 2018" and the fiscal year ended September 30, 2019 as "fiscal 2019."
We are a leading fully integrated firm positioned to design, build, finance and operate infrastructure assets for governments, businesses and organizations throughout the world. We provide planning, consulting, architectural and engineering design services to commercial and government clients worldwide in major end markets such as transportation, facilities, environmental, energy, water and government markets. We also provide construction services, including building construction and energy, infrastructure and industrial construction, primarily in the Americas. In addition, we provide program and facilities management and maintenance, training, logistics, consulting, technical assistance, and systems integration and information technology services, primarily for agencies of the U.S. government and also for national governments around the world. According to Engineering News-Record's (ENR's) 2019 Design Survey, we are the second largest general architectural and engineering design firm in the world, ranked by 2018 design revenue. In addition, we are ranked by ENR as the leading firm in a number of design end markets, including transportation and general building.
We were formed in 1980 as Ashland Technology Company, a Delaware corporation and a wholly-owned subsidiary of Ashland, Inc., an oil and gas refining and distribution company. Since becoming independent of Ashland Inc., we have grown by a combination of organic growth and strategic mergers and acquisitions from approximately 3,300 employees and $387 million in revenue in fiscal 1991, the first full fiscal year of independent operations, to approximately 86,000 employees at September 30, 2019 and $20.2 billion in revenue for fiscal 2019. We completed the initial public offering of our common stock in May 2007 and these shares are traded on the New York Stock Exchange.