Atkore director granted 48.3504 RSU dividend units

Atkore Inc. (ATKR) reported that director A. Mark Zeffiro acquired 48.3504 shares of common stock in the form of dividend equivalent units on unvested or deferred restricted stock units (RSUs) on 2026-08-28.

Rhea-AI Filing Summary

Atkore Inc. (ATKR) reported that director A. Mark Zeffiro acquired 48.3504 shares of common stock in the form of dividend equivalent units on unvested or deferred restricted stock units (RSUs) on 2026-08-28. After this award, his directly held position, including unvested or deferred RSUs and accrued dividend equivalents, is 23,993.8064 shares.

Insider Trade Summary

Grant/Award: 48.3504 shares

Grant/Award 1 txn

Insider Zeffiro A Mark

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1, F2	48.3504	$0.00	$0.00

Holdings After Transaction: Common Stock — 23,993.8064 shares (Direct)

Footnotes (2)

1. F1. Represents dividend equivalent units accrued on unvested or deferred restricted stock units ("RSUs").
2. F2. Includes unvested or deferred restricted stock units ("RSUs") and amounts accrued for dividend equivalent units on such RSUs.

Key Figures

Shares acquired: 48.3504 shares of Common Stock Price per share: $0.0000 Total shares following transaction: 23,993.8064 shares

3 metrics

Shares acquired 48.3504 shares of Common Stock Dividend equivalent units accrued on unvested or deferred RSUs on 2026-08-28

Price per share $0.0000 Grant/award acquisition of dividend equivalent units

Total shares following transaction 23,993.8064 shares Direct holdings after acquisition, including unvested/deferred RSUs and dividend equivalents

Key Terms

restricted stock units ("RSUs"), dividend equivalent units, Grant, award, or other acquisition

3 terms

restricted stock units ("RSUs") financial

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

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

dividend equivalent units financial

"Represents dividend equivalent units accrued on unvested or deferred restricted stock units"

Dividend equivalent units are bookkeeping credits that mirror cash dividends paid on actual shares, granted to holders of stock-based awards such as restricted stock units or deferred compensation. They matter to investors because they increase a company’s reported employee compensation cost and can lead to issuance of more shares or cash payouts over time, similar to extra pay linked to ownership that affects shareholder dilution and corporate cash flow.

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition"

FAQ

What insider transaction did ATKR director A. Mark Zeffiro report?

A. Mark Zeffiro reported an acquisition of 48.3504 shares of Atkore Inc. common stock on 2026-08-28, representing dividend equivalent units accrued on unvested or deferred RSUs.

How many ATKR shares does A. Mark Zeffiro hold after this Form 4 transaction?

Following the reported transaction, A. Mark Zeffiro directly holds 23,993.8064 shares of Atkore Inc. common stock, including unvested or deferred RSUs and amounts accrued for dividend equivalent units on such RSUs.

Was the ATKR Form 4 transaction a market purchase or a grant?

The transaction was a grant/award acquisition (code A), representing dividend equivalent units on unvested or deferred RSUs, not an open-market purchase or sale.

Did A. Mark Zeffiro sell any ATKR shares in this Form 4?

No. The Form 4 reports only an acquisition of 48.3504 shares via dividend equivalent units. There are no reported sales or dispositions in this filing.

Are the reported ATKR shares held directly or indirectly by A. Mark Zeffiro?

The reported holdings are characterized as direct ownership. The total includes unvested or deferred RSUs and associated dividend equivalent units.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/31/2026 - 06:09 PM Accepted by SEC EDGAR 08/31/2026 - 06:09 PM Learn about SEC filing dates

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^*

Zeffiro A Mark

(Last) (First) (Middle)

16100 SOUTH LATHROP AVENUE

(Street)

HARVEY ILLINOIS 60426

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/28/2026

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	08/28/2026		A		48.3504(1)	A	$0	23,993.8064(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	08/31/2026
	** 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)