Atkore (ATKR) executive awarded additional RSU dividend equivalent units in Form 4

Rhea-AI Filing Summary

Atkore Inc. executive Mark F. Lamps received an automatic share-based compensation adjustment rather than making an open-market trade. On May 29, 2026, he acquired 53.2152 shares of common stock as dividend equivalent units tied to unvested restricted stock units (RSUs). After this grant, his directly held and unvested RSU-related position totals 36,102.5375 shares, including prior RSUs and accrued dividend equivalents.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Lamps Mark F.

Role Pres. Safety & Infrastructure

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	53.215	$0.00	--

Holdings After Transaction: Common Stock — 36,102.538 shares (Direct, null)

Footnotes (1)

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

Key Figures

Dividend equivalent units granted: 53.2152 shares Shares following transaction: 36,102.5375 shares Open-market buys: 0 shares +1 more

4 metrics

Dividend equivalent units granted 53.2152 shares Common Stock credited as dividend equivalent units on unvested RSUs on May 29, 2026

Shares following transaction 36,102.5375 shares Total direct holdings including unvested RSUs and dividend equivalent units after grant

Open-market buys 0 shares transactionSummary shows no buy transactions in this Form 4

Open-market sells 0 shares transactionSummary shows no sell transactions in this Form 4

Key Terms

dividend equivalent units, restricted stock units ("RSUs"), Common Stock

3 terms

dividend equivalent units financial

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

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.

restricted stock units ("RSUs") financial

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

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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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

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^*

Lamps Mark F.

(Last) (First) (Middle)

16100 S. 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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Pres. Safety & Infrastructure

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/29/2026

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	05/29/2026		A		53.2152(1)	A	$0	36,102.5375(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 restricted stock units ("RSUs").

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

Remarks:

	/s/ Daniel S. Kelly, Attorney-in-Fact for Mark F. Lamps	06/02/2026
	** 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)

FAQ

What did Atkore (ATKR) executive Mark F. Lamps report in this Form 4 filing?

Mark F. Lamps reported an automatic acquisition of 53.2152 shares of Atkore common stock. These represent dividend equivalent units credited on his unvested RSUs, rather than an open-market stock purchase or sale.

Was the Atkore (ATKR) Form 4 transaction a buy or sell of common stock?

The Form 4 shows an acquisition, but not a market buy. Lamps received 53.2152 dividend equivalent units on unvested RSUs, coded as a grant or award, with no cash purchase or open-market sale involved.

How many Atkore (ATKR) shares does Mark F. Lamps hold after this Form 4 transaction?

After the reported transaction, Lamps holds 36,102.5375 shares of Atkore common stock directly. This figure includes both unvested RSUs and amounts accrued as dividend equivalent units on those RSUs, as described in the filing footnotes.

What are dividend equivalent units on Atkore (ATKR) RSUs in this Form 4?

Dividend equivalent units are additional share units credited on unvested RSUs to mirror cash dividends. In this filing, the 53.2152 shares reported represent such accrued units, increasing Lamps’ RSU-related holdings without a cash transaction.

Does the Atkore (ATKR) Form 4 indicate any options or derivative exercises?

No derivative exercises are reported in this Form 4. The transaction summary shows no option exercises and no derivative transactions; the only activity is a grant of 53.2152 dividend equivalent units on existing unvested RSUs.

Is the Atkore (ATKR) insider transaction routine compensation or a discretionary trade?

The transaction appears as routine compensation. It is coded as a grant or award, reflecting dividend equivalent units on unvested RSUs, rather than a discretionary open-market buy or sell decision by the executive.