Atkore (ATKR) director discloses dividend-equivalent RSU accrual

Rhea-AI Filing Summary

Atkore Inc. director A. Mark Zeffiro reported a small increase in his equity holdings through dividend-related stock units. On 12/17/2025, he acquired 67.7319 shares of Atkore common stock at a price of $0, recorded as an acquisition rather than a sale.

The filing explains that these shares represent dividend equivalent units accrued on unvested or deferred restricted stock units (RSUs). After this transaction, Zeffiro beneficially owns a total of 21,546.7169 shares, which include his unvested or deferred RSUs and the dividend equivalents tied to them, all held directly.

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^*

Zeffiro A Mark

(Last) (First) (Middle)

16100 SOUTH LATHROP AVENUE

(Street)

HARVEY IL 60426

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Atkore Inc. [ ATKR ]

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)
12/17/2025

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	12/17/2025		A		67.7319(1)	A	$0	21,546.7169(2)	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:

1. Represents dividend equivalent units accrued on unvested or deferred restricted stock units ("RSUs").

2. Includes unvested or deferred restricted stock units ("RSUs") and amounts accrued for dividend equivalent units on such RSUs.

Remarks:

	/s/ Daniel S. Kelly, Attorney-in-Fact for A. Mark Zeffiro	12/19/2025
	** 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 insider transaction did Atkore (ATKR) report for A. Mark Zeffiro?

Atkore reported that director A. Mark Zeffiro acquired 67.7319 shares of common stock on 12/17/2025 at a price of $0, recorded as an acquisition.

How many Atkore (ATKR) shares does A. Mark Zeffiro now beneficially own?

Following the reported transaction, A. Mark Zeffiro beneficially owns 21,546.7169 shares of Atkore common stock, held directly.

What are the 67.7319 Atkore (ATKR) shares reported in this Form 4?

The 67.7319 shares represent dividend equivalent units that accrued on unvested or deferred restricted stock units (RSUs) held by A. Mark Zeffiro.

Does the Atkore (ATKR) Form 4 involve restricted stock units (RSUs)?

Yes. The filing states that the reported amount represents dividend equivalent units on unvested or deferred restricted stock units (RSUs), and that Zeffiro’s total includes such RSUs and accrued dividend equivalents.

Is A. Mark Zeffiro a director or officer of Atkore (ATKR)?

The filing identifies A. Mark Zeffiro’s relationship to Atkore as a Director, with the director box checked and no officer title indicated.

Was the Atkore (ATKR) transaction a purchase or a sale of shares?

The transaction is coded as an acquisition of 67.7319 shares at $0, reflecting dividend equivalent units rather than an open-market purchase or sale.