Director A Mark Zeffiro adds RSU dividend units at Atkore (ATKR)

Rhea-AI Filing Summary

Atkore Inc. director A Mark Zeffiro reported an acquisition of 69.3056 shares of common stock on a Form 4. The filing describes these as dividend equivalent units accrued on unvested or deferred restricted stock units. After this grant, his direct holdings total 23,891.0225 shares, including RSUs and related dividend equivalents.

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)
02/27/2026

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	02/27/2026		A		69.3056(1)	A	$0	23,891.0225(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	03/03/2026
	** 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 transaction did Atkore (ATKR) report for A Mark Zeffiro?

Atkore reported that director A Mark Zeffiro acquired 69.3056 shares of common stock. The Form 4 explains these represent dividend equivalent units credited on unvested or deferred restricted stock units, increasing his directly held, RSU-related position in the company.

How many Atkore (ATKR) shares does A Mark Zeffiro hold after this Form 4?

After the reported transaction, A Mark Zeffiro directly holds 23,891.0225 Atkore shares. The filing notes this total includes unvested or deferred restricted stock units and amounts accrued as dividend equivalent units tied to those RSUs.

What is the nature of the 69.3056 Atkore (ATKR) shares acquired by A Mark Zeffiro?

The 69.3056 shares are described as dividend equivalent units on unvested or deferred RSUs. Dividend equivalents mirror dividends on underlying shares, accruing additional units instead of cash, and here they are reflected as common stock in Zeffiro’s reported holdings.

Was cash paid for the 69.3056 Atkore (ATKR) shares reported on the Form 4?

The Form 4 lists a price per share of 0.0000 for the 69.3056 shares. This indicates the acquisition was a grant or credit of dividend equivalent units related to restricted stock units, rather than an open-market purchase for cash.

Is A Mark Zeffiro’s Atkore (ATKR) ownership direct or indirect in this Form 4?

The filing classifies A Mark Zeffiro’s ownership as direct. The nature of ownership field is marked as direct, and the total 23,891.0225 shares reported include his unvested or deferred RSUs and associated dividend equivalent units held in his name.