[Form 4] DT Midstream, Inc. Insider Trading Activity

Rhea-AI Filing Summary

DT Midstream, Inc. Chief Accounting Officer Joseph Peter Finland reported equity transactions on March 5, 2026 related to restricted stock units (RSUs). He exercised or converted 965 RSUs, each representing a right to receive one share of common stock, with fractional shares paid in cash.

This conversion delivered 1,033 shares of common stock, after which a portion of shares was used to cover obligations. 412 shares of common stock were disposed of at $141.77 per share to satisfy exercise price or tax liabilities, leaving 1,657 common shares held directly after the transactions.

Footnotes state that the RSU award totals 1,930 units, of which 965 vested on March 5, 2026 and 965 are scheduled to vest on March 5, 2027, together with associated dividend equivalents, subject to Finland’s continued employment. The holdings also include shares acquired under the issuer’s dividend reinvestment plan.

Insider Trade Summary

965 shares exercised/converted

Mixed 3 txns

Insider Finland Joseph Peter

Role Chief Accounting Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	965	$0.00	--
Exercise	Common Stock	1,033	$0.00	--
Tax Withholding	Common Stock	412	$141.77	$58K

Holdings After Transaction: Restricted Stock Units — 965 shares (Direct); Common Stock — 2,069 shares (Direct)

Footnotes (1)

1. Includes shares of the Issuer's common stock acquired under the Issuer's dividend reinvestment plan. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock with any fractional shares being paid in cash. Restricted stock units of which 965 vested on March 5, 2026 and 965 vest on March 5, 2027, together with associated dividend equivalents, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting dates.

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

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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).

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^*

Finland Joseph Peter

(Last) (First) (Middle)

500 WOODWARD AVE., SUITE 2900

(Street)

DETROIT MI 48226

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
DT Midstream, Inc. [ DTM ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/05/2026

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	03/05/2026		M		1,033(1)	A	(2)	2,069(1)	D
Common Stock	03/05/2026		F		412	D	$141.77	1,657	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
Restricted Stock Units	(2)	03/05/2026		M			965	(3)	(3)	Common Stock	965	$0	965	D

Explanation of Responses:

1. Includes shares of the Issuer's common stock acquired under the Issuer's dividend reinvestment plan.

2. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock with any fractional shares being paid in cash.

3. Restricted stock units of which 965 vested on March 5, 2026 and 965 vest on March 5, 2027, together with associated dividend equivalents, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting dates.

	/s/ Andrew Hayner, Attorney-in-Fact	03/09/2026
	** 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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FAQ

What insider transactions did DT Midstream (DTM) report for Joseph Peter Finland?

Joseph Peter Finland reported RSU vesting, share issuance, and related share dispositions. On March 5, 2026, 965 restricted stock units vested and converted into 1,033 common shares, and 412 common shares were delivered to cover exercise price or tax liabilities, leaving 1,657 shares directly held.

How many DT Midstream (DTM) restricted stock units vested for Joseph Peter Finland?

965 restricted stock units vested for Joseph Peter Finland on March 5, 2026. These RSUs represent contingent rights to receive one share of DT Midstream common stock each, with any fractional shares settled in cash according to the company’s equity award terms.

What DT Midstream (DTM) share disposal did Joseph Peter Finland report for tax or exercise obligations?

Finland reported disposing of 412 DT Midstream common shares for obligations. On March 5, 2026, 412 common shares were delivered at a price of $141.77 per share to pay the exercise price or tax liability associated with his equity award transactions.

How many DT Midstream (DTM) shares does Joseph Peter Finland hold after these transactions?

Joseph Peter Finland directly holds 1,657 DT Midstream common shares after the transactions. This post-transaction balance reflects RSU conversion into common stock and the delivery of 412 shares to satisfy exercise price or tax liabilities on March 5, 2026.

What future restricted stock unit vesting is scheduled for Joseph Peter Finland at DT Midstream (DTM)?

An additional 965 restricted stock units are scheduled to vest on March 5, 2027. These units, together with associated dividend equivalents, will vest only if Finland remains employed by DT Midstream through the applicable vesting date, according to the award’s conditions.

Do Joseph Peter Finland’s DT Midstream (DTM) holdings include dividend reinvestment plan shares?

Yes, his holdings include shares acquired through DT Midstream’s dividend reinvestment plan. A footnote explains that the reported common stock position encompasses shares obtained under the issuer’s plan, in addition to shares received from restricted stock unit vesting events.