Prospectus supplement

Summary

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• Parker-Hannifin is offering 700,000,000 euros of 3.800% senior notes due 2030, 800,000,000 euros of 4.040% senior notes due 2032, and 525,000,000 euros of 4.375% senior notes due 2036.
• Net proceeds of approximately 2,015,663,250 euros, together with a concurrent US$2.4 billion US Dollar notes offering and cash on hand, will repay borrowings under the 364-Day Credit Agreement incurred for the Filtration Group Corporation (FGC) acquisition.
• The FGC Acquisition closed on August 13, 2026 for a cash purchase price of $9.25 billion, funded with Term Loans, commercial paper, and cash on hand.
• Interest on all three tranches accrues from September 14, 2026, paid annually, with a change of control triggering event requiring an offer to purchase the notes at 101% of principal plus accrued interest.
• Parker announced a definitive agreement to acquire CIRCOR International's Commercial and Defense Aerospace business for approximately $2.55 billion in cash, backed by a planned CIRCOR Credit Agreement of up to $2.0 billion.
• Application has been made to admit the notes to the Official List of Euronext Dublin and to trading on its Global Exchange Market, with settlement on or about September 14, 2026.

Why it mattersThe euro notes plus a concurrent US$2.4 billion dollar offering refinance the term loans used to fund Parker's $9.25 billion Filtration Group acquisition. The filing also discloses a pending $2.55 billion purchase of CIRCOR's aerospace and defense business.