3M CO (MMM) SVP exercises 1,441 RSUs; 517 shares withheld

Rhea-AI Filing Summary

3M CO senior vice president and chief accounting officer Theresa E. Reinseth reported routine equity compensation activity. She exercised 1,441 restricted stock units into an equal number of common shares at $142.50 per share, and 517 of those shares were withheld to cover tax obligations. After these transactions, she directly owned 3,521.6554 common shares and held 1,442 restricted stock units, each representing a contingent right to one share. She also indirectly held 571 common shares through a 401(k)/PAESOP trust, including shares acquired via 3M's dividend reinvestment plan.

Insider Trade Summary

1,441 shares exercised/converted

Mixed 4 txns

Insider Reinseth Theresa E

Role Sr Vice President & CAO

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	1,441	$0.00	--
Exercise	Common Stock	1,441	$142.50	$205K
Tax Withholding	Common Stock	517	$142.50	$74K
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 1,442 shares (Direct, null); Common Stock — 4,038.655 shares (Direct, null); Common Stock — 571 shares (Indirect, By 401k/paesop Trust)

Footnotes (1)

1. Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan. Each restricted stock unit represents a contingent right to receive one share of 3M common stock. The restricted stock units vest in three equal annual installments beginning on May 3, 2025.

Key Figures

RSUs exercised: 1,441 shares at $142.50 Shares withheld for taxes: 517 shares at $142.50 Direct common shares after transaction: 3,521.6554 shares +2 more

5 metrics

RSUs exercised 1,441 shares at $142.50 Common Stock acquired via derivative exercise on 2026-05-01

Shares withheld for taxes 517 shares at $142.50 Tax-withholding disposition (code F) on 2026-05-01

Direct common shares after transaction 3,521.6554 shares Direct ownership following transactions

Indirect common shares in 401(k)/PAESOP 571 shares Indirect ownership via 401k/PAESOP trust

Restricted Stock Units outstanding 1,442 units Each unit represents right to one share of 3M stock

Key Terms

Restricted Stock Units, Dividend Reinvestment Plan, tax-withholding disposition

3 terms

Restricted Stock Units financial

"The restricted stock units vest in three equal annual installments beginning on May 3, 2025."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Dividend Reinvestment Plan financial

"Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan."

A dividend reinvestment plan lets shareholders automatically use cash dividends to buy more shares of the same company instead of receiving the money. It matters to investors because it turns regular payouts into a steady way to grow ownership and take advantage of compound returns—like having your savings automatically buy additional slices of a pie over time—while often reducing transaction costs and smoothing purchase timing.

tax-withholding disposition financial

"Payment of exercise price or tax liability by delivering securities"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Form 4 Insider Transactions: What Each Field Means →

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^*

Reinseth Theresa E

(Last) (First) (Middle)

3M CENTER

(Street)

ST. PAUL MINNESOTA 55144

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
3M CO [ MMM ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Sr Vice President & CAO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/01/2026

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

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

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

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	05/01/2026		M		1,441	A	$142.5	4,038.6554	D
Common Stock	05/01/2026		F		517	D	$142.5	3,521.6554(1)	D
Common Stock								571	I	By 401k/paesop Trust

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
Restricted Stock Units	(2)	05/01/2026		M			1,441	(3)	(3)	Common Stock	1,441	$0	1,442	D

Explanation of Responses:

1. Includes shares acquired pursuant to 3M's Dividend Reinvestment Plan.

2. Each restricted stock unit represents a contingent right to receive one share of 3M common stock.

3. The restricted stock units vest in three equal annual installments beginning on May 3, 2025.

	/s/ Patricia L. Meagher, attorney-in-fact for Theresa E. Reinseth	05/04/2026
	** 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.
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 4: SEC 1474 (03-26)

FAQ

What insider equity transactions did 3M (MMM) executive Theresa Reinseth report?

Theresa Reinseth exercised 1,441 restricted stock units into 3M common stock at $142.50 per share and had 517 of those shares withheld to satisfy tax liabilities. The activity reflects routine equity compensation rather than an open-market trade.

How many 3M (MMM) shares does Theresa Reinseth hold after this Form 4?

Following the reported transactions, Theresa Reinseth directly holds 3,521.6554 shares of 3M common stock and indirectly holds 571 shares through a 401(k)/PAESOP trust. She also holds 1,442 restricted stock units, each representing a contingent right to receive one 3M share.

What does the tax-withholding transaction on 3M (MMM) shares mean in this Form 4?

The Form 4 shows 517 3M shares with transaction code F at $142.50 per share, indicating shares withheld to pay exercise price or taxes. This disposition is a non-market event used to satisfy obligations, not an open-market sale reflecting a trading decision.

How were 3M (MMM) restricted stock units treated in Theresa Reinseth’s filing?

The filing reports 1,441 restricted stock units converted into common stock, with each unit representing one share. After the conversion, 1,442 restricted stock units remained outstanding, vesting in three equal annual installments beginning May 3, 2025, according to the footnotes.

What indirect 3M (MMM) holdings does Theresa Reinseth report?

Theresa Reinseth reports 571 3M common shares held indirectly through a 401(k)/PAESOP trust. Footnotes state this amount includes shares acquired via 3M’s dividend reinvestment plan, indicating accumulation through retirement and reinvestment programs rather than active market purchases.