DCI Form 4: Guillermo Briseno Reports 3,935-Share Acquisition

Rhea-AI Filing Summary

Guillermo Briseno, listed as President of Donaldson Co Inc (DCI), reported a transaction on 09/25/2025. The Form 4 shows he acquired 3,935 shares of common stock, bringing his total beneficial ownership to 29,244 shares. The reported price is listed as $0. The filing was submitted by Amy C. Becker as Attorney-in-Fact and is a single-person Form 4 submission.

Positive

• Officer acquisition recorded: 3,935 common shares acquired on 09/25/2025
• Increased beneficial ownership: Holdings rose to 29,244 shares following the transaction
• Clear, properly filed Form 4: Submission executed by an Attorney-in-Fact and filed as a single reporting person

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Company officer recorded an insider acquisition that modestly increases personal holdings; filing is routine and procedural.

The Form 4 documents an insider purchase by the company President, which is a normal disclosure under Section 16. The acquisition increases the reporting persons beneficial stake to 29,244 shares. The filing includes an Attorney-in-Fact signature, indicating the form was executed by a designated representative. There are no derivative transactions or dispositions disclosed. Overall this is a standard insider reporting event without accompanying contextual details in the filing.

Securities Analyst

TL;DR: Insider acquired 3,935 shares; transaction size appears modest relative to typical public-company stakes.

The disclosed acquisition of 3,935 common shares on 09/25/2025 increased the reporting person's total to 29,244 shares. The Form 4 shows the transaction price as $0 but provides no explanation for the price field within the filing. No options, warrants, or other derivative positions were reported. Absent additional context on company share count or recent trades, the transaction should be viewed as a routine insider disclosure.

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

1. Name and Address of Reporting Person^*

Briseno Guillermo

(Last) (First) (Middle)

PO BOX 1299

(Street)

MINNEAPOLIS MN 55440

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
09/25/2025

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	09/25/2025		A		3,935	A	$0	29,244	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

Explanation of Responses:

Remarks:

	Amy C. Becker, Attorney-in-Fact for Guillermo Briseno	09/25/2025
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transaction did Guillermo Briseno report on Form 4 for DCI?

The Form 4 reports that Guillermo Briseno acquired 3,935 shares of Donaldson Co Inc common stock on 09/25/2025.

What is Guillermo Brisenos total beneficial ownership of DCI after the reported trade?

After the reported acquisition, Briseno beneficially owns 29,244 shares of DCI common stock according to the filing.

What price was reported for the shares acquired by Briseno?

The Form 4 lists the transaction price as $0 for the reported acquisition; the filing does not provide further explanation within the document.

Who signed the Form 4 filing for Guillermo Briseno?

The filing was signed by Amy C. Becker, Attorney-in-Fact for Guillermo Briseno on 09/25/2025.

Were any derivative securities reported in this Form 4 for DCI?

No. Table II for derivative securities contains no reported transactions or holdings in this filing.