Donaldson director Trudy Rautio reports stock and option buys

Donaldson Company director Trudy Rautio reported acquiring additional company equity.

Accepted by SEC EDGAR 01/06/2026 - 02:16 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Donaldson Company director Trudy Rautio reported acquiring additional company equity. On January 2, 2026, she acquired 900 shares of common stock at a stated price of $0 per share and 311 shares of common stock at $89.93 per share. After these transactions, she beneficially owned 27,235 shares of Donaldson common stock held directly. The same day, she was also granted a stock option for 3,000 shares of Donaldson common stock at an exercise price of $89.93 per share, expiring on January 2, 2036. The option vests in three equal annual installments beginning January 2, 2027.

Insider Trade Summary

Grant/Award: 4,211 shares

Grant/Award 3 txns

Insider Rautio Trudy A.

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	3,000	$0.00	$0.00
Grant/Award	Common Stock	900	$0.00	$0.00
Grant/Award	Common Stock	311	$89.93	$28K

Holdings After Transaction: Stock Option (right to buy) — 3,000 contracts (Direct); Common Stock — 27,235 shares (Direct)

Footnotes (1)

1. F1. The option vests in three equal annual installments beginning on January 2, 2027.

FAQ

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What insider transaction did Donaldson (DCI) director Trudy Rautio report?

Trudy Rautio reported acquiring 900 shares of Donaldson common stock at a stated price of $0 per share and 311 shares at $89.93 per share on January 2, 2026.

How many Donaldson (DCI) shares does Trudy Rautio own after the reported Form 4 transactions?

Following the reported transactions on January 2, 2026, Trudy Rautio beneficially owned 27,235 shares of Donaldson common stock held directly.

What stock options were granted to Donaldson (DCI) director Trudy Rautio?

On January 2, 2026, Trudy Rautio received a stock option for 3,000 shares of Donaldson common stock with an exercise price of $89.93 per share, expiring on January 2, 2036.

When do Trudy Rautio’s new Donaldson (DCI) stock options vest?

The option for 3,000 shares vests in three equal annual installments beginning on January 2, 2027, as described in the filing.

What is Trudy Rautio’s relationship to Donaldson Company (DCI)?

Trudy Rautio is reported as a director of Donaldson Company, as indicated in the relationship section of the filing.

Are Trudy Rautio’s Donaldson (DCI) holdings direct or indirect?

The filing shows 27,235 shares of Donaldson common stock and 3,000 stock options as held with direct (D) ownership.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Rautio Trudy A.

(Last) (First) (Middle)

1400 WEST 94TH STREET

(Street)

BLOOMINGTON MN 55431

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
DONALDSON Co INC [ DCI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	01/02/2026		A		900	A	$0	26,924	D
Common Stock	01/02/2026		A		311	A	$89.93	27,235	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$89.93	01/02/2026		A		3,000		(1)	01/02/2036	Common Stock	3,000	$0	3,000	D

Explanation of Responses:

1. The option vests in three equal annual installments beginning on January 2, 2027.

Remarks:

	Amy C. Becker, Attorney-in-fact for Trudy Rautio	01/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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