Parker-Hannifin Corp

1917–1950

Parker-Hannifin was founded by Arthur L. Parker in 1917 or 1918 as the "Parker Appliance Company". In its early years, it built pneumatic brake systems for buses, trucks, and trains. In 1919, Parker's truck slid over a cliff, causing the company to lose its entire inventory and forcing Arthur Parker to return to his previous job for five years.

Arthur Parker re-founded the company in 1924. By 1927, the firm had expanded into airplanes. For his flight across the Atlantic Ocean, Charles Lindbergh requested Parker parts be used in the construction of his aircraft Spirit of St. Louis. The firm contributed the system that linked the aircraft's 16 fuel tanks.

During World War II, Parker experienced a boom in business when it became the primary supplier of valves and fluid connectors to the U.S. Army Air Forces, the forerunner of the U.S. Air Force. By 1943, the firm employed 5,000 Cleveland, Ohio, residents. After Arthur Parker's death in 1945 and the end of the war, the company neared bankruptcy due to the sudden drop in demand. Arthur Parker's wife, Helen Parker, assumed control of the company and prevented its liquidation. She hired new management staff and directed the company's focus back to civilian manufacturing.

1950s–1960s

In the early 1950s, the firm's executives set a goal to make Parker, as The New York Times put it, "the General Electric of fluid power ", a goal it generally achieved in the coming decades. In 1957, the company purchased Hannifin, founded by Arthur Hannifin in 1917, a producer of valve and cylinder products, and changed its name to Parker Hannifin. Many more acquisitions followed, with the company reaching 40 acquisitions by the year 1979.

In 1953, Arthur Parker's son Patrick S. Parker began working full-time at the company. He rose to become its president in 1968, and served as CEO from 1971 to 1983 and as chairman from 1977 to 1999. During and after his tenure, the firm grew dramatically, with revenues rising from $197 million in 1968 to over $7 billion in 2005.

The company debuted on the New York Stock Exchange in 1964, under the ticker symbol PH. In 1966, the company joined the Fortune 500. The company designed parts for the craft used in NASA 's first crewed Moon landing in 1969.

1970s–1990s

An economic downturn in 1970 forced the company to expand beyond its focus on hydraulic systems. In the following years it began to expand into the automotive aftermarket, considered a more stable industry. The company also directed itself toward growth in aerospace, acquiring companies that created flight controls and wheel brake equipment for airplanes. By 1979, Parker Hannifin employed 20,000 people in 100 plants, selling 90,000 items for machinery, airplanes, cars and construction equipment to 60,000 customers. The company made some of the equipment inside the mechanical shark in the 1975 movie Jaws.

In 1982, Paul G. Schloemer replaced Patrick Parker as the company's president (although Patrick Parker remained chairman and CEO). That same year, the firm entered the Mexican market. By 2008, Parker Hannifin Mexico would come to operate 11 plants in the country, seven of which made parts exclusively for the U.S. market. In 1988, the company reached $2 billion in sales.

The firm opened its first retail "ParkerStore" in Cleveland in 1993. Within 10 years, the network of stores expanded to 200 locations in the U.S. and more than 400 worldwide. ParkerStores offer a variety of Parker products, including hydraulics, automation, and hose and fitting components, at locations close to industrial product buyers. Parker Hannifin systems helped control the massive replica of the Titanic in the 1997 film of the same name. In 1997, the firm moved its headquarters from Cleveland to a new building in Mayfield Heights, a suburb of Cleveland. In 1999, the company's sales reached approximately $5 billion.

2000s–present

Parker Hannifin acquired Commercial-Intertech Corporation, a maker of hydraulic systems, in 2000. Commercial-Intertech had previously acquired Oildyne Inc., a well known hydraulic manufacturer. Parker has an Oildyne division today. With a cost of $366 million, this was at the time Parker Hannifin's biggest acquisition.

In 2001, CEO Don Washkewicz introduced lean startup methods to company operations and has said that over the decade this reduced the time to obtain price quotes by 60% and cut product development lead times by 25%.

In 2002 the company appointed Craig Maxwell as head of engineering; Maxwell brought a focus on innovation as well as rigor; he argued for and was given a $20M annual budget to fund blue sky inventions made by engineers and has given engineers time to pursue them; at the same time his team developed software that allows tracking each of the company's 1700 ongoing R&D projects graded by risk and potential reward, and closely managing their progress. In 2011 he hired Ryan Farris out of Vanderbilt University and licensed patents covering a powered exoskeleton that Farris had worked on at Vanderbilt. In 2015 the company opened an internal business incubator that Maxwell had proposed when he was first hired.

The company won $2 billion in contracts to build fuel and hydraulic systems for Airbus A350 airliners in 2008 Two years later, its products were used in repairing the Deepwater Horizon oil rig.

Thomas Williams took over the CEO role from Washkewicz in 2015. In 2016, the company completed its largest acquisition to date, buying Clarcor, a filtration systems manufacturer, for $4.3 billion. In 2019, Parker bought Lord Corporation for $3.7 billion and Kent, WA based Exotic Metals Forming Company for $1.7 billion.

In August 2021, the company agreed to buy British aerospace and defense company Meggitt for £6.3 billion. In July 2022, after making commitments to the UK government including increasing research and development spending in Britain, the Secretary of State for Business, Energy and Industrial Strategy approved the takeover without being referred for a full Competition and Markets Authority investigation. The acquisition completed in September 2022.

In May 2022, it was announced Parker Hannifin has sold its aircraft wheel and brake division to the Bloomfield -headquartered aerospace company, Kaman Corporation for US$440 million.

In November 2025, Parker Hannifin announced a deal to buy Filtration Group, a privately held filtration-technologies manufacturer, for $9.25 billion. The deal is expected to create one of the largest industrial filtration businesses in the world.

In May 2026, the company announced the acqusition of Circor's commercial and defense aerospace unit from KKR & Co. for $2.55 billion.