DONALDSON Co INC — Director's Dealing 2025

Dec 1, 2025

SEC Form 3/A — Form 3/A

Issuer: DONALDSON Co INC (DCI)
CIK: 0000029644
Period of Report: 2025-09-26

Reporting Person: Driesen Bart C. (President)

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	9996	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Employee Stock Option (right to buy)	$45.43	2027-09-22	Common Stock (4000)		Direct
Employee Stock Option (right to buy)	$59.18	2028-09-21	Common Stock (3000)		Direct
Employee Stock Option (right to buy)	$51.61	2029-09-26	Common Stock (4000)		Direct
Employee Stock Option (right to buy)	$46.06	2030-09-24	Common Stock (4000)		Direct
Employee Stock Option (right to buy)	$59.40	2031-09-23	Common Stock (4000)		Direct
Employee Stock Option (right to buy)	$50.89	2032-09-22	Common Stock (14500)		Direct
Employee Stock Option (right to buy)	$59.66	2033-09-21	Common Stock (15900)		Direct
Employee Stock Option (right to buy)	$73.17	2034-10-01	Common Stock (16800)		Direct

Footnotes

F1: The original Form 3, and one Form 4 filed by the reporting person after his original Form 3 was filed, understated the ownership of non-derivative securities on Table I by 4,835 shares.

F2: Fully vested

F3: The option vests in three equal annual installments beginning on September 21, 2024.

F4: The option vests in three equal annual installments beginning on October 1, 2025.