DT Midstream (DTM) director Tumminello sells 2,002 common shares

Rhea-AI Filing Summary

DT Midstream, Inc. director Peter I. Tumminello reported an open-market sale of common stock. On February 26, 2026, he sold 2,002 shares of DT Midstream common stock at a price of $135.79 per share. After this transaction, he directly owned 11,386 shares of the company’s common stock.

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

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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^*

Tumminello Peter I

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

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	02/26/2026		S		2,002	D	$135.79	11,386	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:

	/s/ Andrew Hayner, Attorney-in-Fact	02/27/2026
	** 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.

FAQ

What insider transaction did DT Midstream (DTM) report for Peter I. Tumminello?

DT Midstream reported that director Peter I. Tumminello sold 2,002 shares of common stock. The transaction was an open-market sale at a reported price of $135.79 per share on February 26, 2026.

What was the sale price in Peter Tumminello’s DT Midstream (DTM) Form 4 filing?

The Form 4 shows that 2,002 DT Midstream common shares were sold at $135.79 per share. This transaction was coded as a sale in open market or private transaction, indicating a standard disposition of directly held shares.

How many DT Midstream (DTM) shares does Peter Tumminello hold after the reported sale?

After the reported transaction, Peter I. Tumminello directly owned 11,386 shares of DT Midstream common stock. The Form 4 indicates the ownership type as direct, reflecting his remaining stake following the 2,002-share open-market sale.

What transaction code and direction are reported in the DT Midstream (DTM) Form 4?

The Form 4 lists transaction code “S”, described as a sale in open market or private transaction. The normalized direction is sell, confirming that the filing reflects a disposition of 2,002 common shares by the reporting director.

Is Peter Tumminello’s DT Midstream (DTM) share sale classified as direct or indirect ownership?

The filing identifies Peter I. Tumminello’s ownership as direct, with the ownership code “D”. Both the sold 2,002 shares and the 11,386 shares held after the transaction are reported under direct ownership, with no indirect entities noted.