Donaldson president reports 6,506 direct shares

The two option positions have different exercise prices and vesting start dates, with expiration dates in 2035 and 2036.

Available on EDGAR 11/05/2026 - 04:11 PM EST Accepted by SEC EDGAR 11/05/2026 - 04:10 PM EST

Filing Impact

(Moderate)

Filing Sentiment

(Neutral)How Sentiment works

Sentiment and the balance of points

Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.

How Sentiment works How the balance works

Form Type

Rhea-AI Filing Summary

Donaldson Co. Inc. (DCI) reports President Jeffrey A. Stierman’s holdings as of November 2, 2026: 6,506 common shares directly and 95 indirectly through a Benefit Plan Trust. He also holds options for 9,600 common shares at an $82.08 exercise price, expiring October 1, 2035, and options for 8,000 common shares at $87.76, expiring October 1, 2036. The first option vests in three equal annual installments beginning October 1, 2026; the second begins vesting October 1, 2027.

Insider Trade Summary

Holdings reported, no transactions

Holdings

Insider Stierman Jeffrey A.

Role President

Type	Security	Shares	Price	Value
Holding	Employee Stock Option (right to buy) ^F1	--	--	--
Holding	Employee Stock Option (right to buy) ^F2	--	--	--
Holding	Common Stock	--	--	--
Holding	Common Stock	--	--	--

Holdings: Employee Stock Option (right to buy) — 17,600 contracts (Direct); Common Stock — 95 shares (Indirect, By Benefit Plan Trust); Common Stock — 6,506 shares (Direct)

Footnotes (2)

F1. The option vests in three equal annual installments beginning on October 1, 2026.
F2. The option vests in three equal annual installments beginning on October 1, 2027.

Key Figures

Common shares held directly: 6,506 shares Common shares held indirectly: 95 shares Option underlying shares: 9,600 shares +3 more

6 metrics

Common shares held directly 6,506 shares As of November 2, 2026

Common shares held indirectly 95 shares Held through a Benefit Plan Trust as of November 2, 2026

Option underlying shares 9,600 shares Options expire October 1, 2035 and vest in three equal annual installments beginning October 1, 2026

Exercise price $82.08 per share Options for 9,600 common shares

Option underlying shares 8,000 shares Options expire October 1, 2036 and vest in three equal annual installments beginning October 1, 2027

Exercise price $87.76 per share Options for 8,000 common shares

Key Terms

Employee Stock Option (right to buy), exercise price, vests in three equal annual installments, Benefit Plan Trust

4 terms

Employee Stock Option (right to buy) financial

"Employee Stock Option (right to buy)"

exercise price financial

"conversion or exercise price"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vests in three equal annual installments financial

"The option vests in three equal annual installments"

Benefit Plan Trust financial

"By Benefit Plan Trust"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many DCI shares does Jeffrey A. Stierman hold?

As of November 2, 2026, President Jeffrey A. Stierman reported 6,506 common shares held directly and 95 common shares held indirectly through a Benefit Plan Trust.

What stock options did DCI President Jeffrey A. Stierman report?

He reported options for 9,600 common shares at an $82.08 exercise price, expiring October 1, 2035, and options for 8,000 common shares at $87.76, expiring October 1, 2036. They vest in three equal annual installments, beginning October 1, 2026, and October 1, 2027, respectively.

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

Understanding Insider Trading Forms →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Stierman Jeffrey A.

(Last)

(First)

(Middle)

1400 WEST 94TH STREET

(Street)

BLOOMINGTON

MINNESOTA

55431-2303

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
11/02/2026

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

3a. Foreign Trading Symbol

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

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

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

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	95	I	By Benefit Plan Trust
Common Stock	6,506	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivative Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (right to buy)	⁽¹⁾	10/01/2035	Common Stock	9,600	$82.08	D
Employee Stock Option (right to buy)	⁽²⁾	10/01/2036	Common Stock	8,000	$87.76	D

Explanation of Responses:

1. The option vests in three equal annual installments beginning on October 1, 2026.

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

Remarks:

	Amy C. Becker, Attorney-in-Fact for Jeffrey A. Stierman	11/05/2026
	** 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 5 (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.
* Form 3: SEC 1473 (03-26)

Source: View Original Filing on SEC EDGAR