Parker Hannifin

Parker-Hannifin Corporation

Company type	Public
Industry	Motion and control technology, manufacturing
Predecessor	Parker Appliance Company
Founded	1917 (1917)
Founder	Arthur L. Parker
Headquarters	Mayfield Heights, Ohio , United States
Area served	Worldwide
Key people	Thomas Williams (CEO)
Products	Motion control systems, aerospace components, filtration systems, fluid and gas management, hydraulics, pneumatics, process control, sealing technologies
Number of employees	61,000 (2024)
Website	www.parker.com

Parker-Hannifin Corporation, initially known as Parker Appliance Company, is a U.S.-based enterprise specializing in motion and control solutions. Its main office is located in Mayfield Heights, Ohio, within the Greater Cleveland area.

Established in 1917 by Arthur L. Parker, the company has been listed on the New York Stock Exchange since 1964 under the symbol PH. It stands as a prominent global producer in various motion control industries, including aerospace, climate control, electromechanical systems, filtration, fluid and gas management, hydraulics, pneumatics, process control, and sealing technologies. The organization employs around 61,000 individuals worldwide.

In 2024, Parker-Hannifin announced revenues totaling US$19.9 billion, with operating profits of US$3.81 billion and net earnings of US$2.84 billion, demonstrating robust financial results and expansion. That year, it secured the 216th position on the Fortune 500 ranking, highlighting its substantial market presence and competitive strength within manufacturing.

1917–1950

The Parker Appliance Company was founded by Arthur L. Parker in Ohio circa 1917 or 1918, initially focusing on pneumatic brake systems for buses, trucks, and trains. After a significant setback in 1919 when Parker’s inventory was lost due to a truck accident, he reestablished the business in 1924.

By 1927, the company had ventured into aerospace, providing essential parts for Charles Lindbergh’s Spirit of St. Louis, notably the system connecting its 16 fuel tanks. During World War II, Parker became a key supplier of valves and fluid connectors to the U.S. Air Force, employing approximately 5,000 workers by 1943.

Following Arthur Parker’s death in 1945 and a postwar demand decline that nearly caused bankruptcy, his wife Helen Parker assumed leadership. She restored stability by appointing new management and redirecting efforts toward civilian manufacturing.

1950s–1960s

In the early 1950s, company leaders aimed to establish Parker Hannifin as "the General Electric of fluid power," a vision largely realized over subsequent decades. In 1957, the acquisition of Hannifin—founded by Arthur Hannifin in 1917 and specializing in valves and cylinders—led to rebranding as Parker Hannifin. By 1979, the company had completed 40 acquisitions to broaden its market reach.

Patrick S. Parker, son of Arthur L. Parker, joined the firm full-time in 1953 and advanced to president in 1968, CEO from 1971 until 1983, and chairman through 1999. Under his guidance, revenues rose dramatically from $197 million in 1968 to more than $7 billion by 2005.

Parker Hannifin entered the New York Stock Exchange in 1964 with ticker PH and earned a spot on the Fortune 500 list by 1966. The firm supplied vital components for NASA's Apollo 11 mission in 1969, enhancing its reputation within the industry.

1970s–1990s

Confronted with an economic recession in 1970, Parker Hannifin diversified beyond hydraulics into automotive aftermarket and aerospace industries through targeted acquisitions of flight control and wheel brake manufacturers. By 1979, its workforce numbered around 20,000 employees across 100 facilities worldwide, offering a product range exceeding 90,000 items to some 60,000 customers globally.

In 1982, Paul G. Schloemer assumed the presidency while Patrick Parker retained roles as chairman and CEO. That year marked entry into Mexico; by 2008 the company operated eleven plants there primarily serving U.S. markets. Sales reached $2 billion by the late 1980s.

The first retail "ParkerStore" opened in Cleveland in 1993 and expanded to over 200 locations across the United States and more than 400 internationally within ten years. These outlets supply hydraulics, automation components, hoses, and fittings directly to industrial clients. The company's technology also played roles in notable projects such as the mechanical shark featured in Jaws (1975) and the Titanic replica (1997).

In 1997, headquarters were relocated to Mayfield Heights, Ohio. By 1999 sales neared $5 billion amid continued growth supported by acquisitions including Commercial Intertech for $366 million.

2000s–present

In 2000, Parker Hannifin completed its most substantial acquisition at that time by purchasing Commercial Intertech Corporation, a manufacturer specializing in hydraulic systems, for $366 million. Commercial Intertech had earlier acquired Oildyne Inc., which continues to operate as a division within Parker.

With Don Washkewicz as CEO in 2001, Parker embraced lean startup principles, resulting in a 60% reduction in price quote turnaround and a 25% decrease in product development cycle times, thereby improving operational productivity. In 2002, Craig Maxwell took over as head of engineering, allocating an annual $20 million budget toward innovation initiatives and creating software to oversee the company’s broad R&D activities. Maxwell also launched an internal business incubator in 2015 to encourage new business ventures.

In 2008, Parker secured contracts worth $2 billion to supply fuel and hydraulic systems for the Airbus A350, underscoring its significant presence in the aerospace sector. Additionally, Parker’s products were instrumental in the repair efforts of the Deepwater Horizon oil rig in 2010.

Thomas Williams succeeded Washkewicz as CEO in 2015. Under his leadership, the company grew through major acquisitions: Clarcor, a filtration systems producer, for $4.3 billion in 2016; Lord Corporation for $3.7 billion; and Exotic Metals Forming Company for $1.7 billion in 2019. These purchases expanded Parker’s product range and strengthened its competitive position within aerospace and industrial markets.

In August 2021, Parker announced plans to acquire Meggitt, a British aerospace and defense company, for £6.3 billion. After pledging to boost UK research and development investments, the UK government approved the transaction in July 2022 without conducting a full competition review. The acquisition finalized in September 2022, marking a major growth milestone for Parker’s global reach and industry influence.

In May 2022, Parker divested its aircraft wheel and brake division to Kaman Corporation for $440 million, allowing it to sharpen focus on its core aerospace and industrial product lines.

Aerospace

Parker Hannifin’s aerospace division develops and produces hydraulic systems, flight control components, fuel system parts, and high-temperature bleed air valves. Based in Irvine, California, Parker Aerospace operates worldwide facilities and maintains contracts with leading manufacturers such as Airbus, Rolls-Royce, and Commercial Aircraft Corporation of China.

In 1993, Parker Aerospace was contracted by the Federal Aviation Administration to create the Multi-Sensor Enroute Flight Inspection System for use on flight inspection aircraft.

Notable acquisitions include the Abex/NWL division of Pneumo Abex located in Kalamazoo, Michigan in 1996 and Shaw Aero Devices based in Naples, Florida in 2007. In 2012, Parker formed a joint venture with General Electric, Advanced Atomization Technologies—a 50/50 partnership focused on manufacturing fuel nozzles for commercial aircraft engines—enhancing its aerospace component offerings and market penetration.

Boeing 737 accidents and incidents

In 1995, several accidents involving Boeing 737 aircraft, such as United Airlines Flight 585 and USAir Flight 427, were associated with malfunctions in a servo unit provided by Parker Hannifin. In 2004, a jury in Los Angeles awarded $43 million to the families of victims from the 1997 SilkAir Flight 185 crash; Parker Hannifin later reached an out-of-court settlement. While the Indonesian National Transportation Safety Committee (NTSC) was unable to identify the crash cause due to insufficient evidence, the US National Transportation Safety Board (NTSB) determined that pilot actions were likely a contributing factor.

The Federal Aviation Administration (FAA) required all Boeing 737 rudder control systems to be upgraded by November 2002. Although Parker Hannifin maintained that its parts were among the safest available, the FAA’s directive remained in effect. In 2016, former NTSB investigator John Cox reaffirmed the agency’s conclusions, noting that no rudder reversal incidents had occurred since Boeing implemented its redesign, reflecting enhanced safety measures and regulatory adherence.

F-35 fueldraulic line failure

On January 18, 2013, the F-35B model of the Lockheed Martin F-35 Lightning II was grounded following a failure in the fueldraulic line within the propulsion system responsible for exhaust vectoring control. This event came shortly after a similar malfunction on January 16. The issue was traced back to Parker Hannifin's Stratoflex division, illustrating the complexities involved in producing vital aerospace components.