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  4. [Form 4] Atkore Inc. Insider Trading Activity

Atkore executive granted 47 dividend stock units

Atkore Inc. (ATKR) reported that officer Mark F. Lamps, President, Safety & Infrastructure, acquired 47.2682 shares of Common Stock on 2026-08-28 through a grant/award transaction.

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Atkore Inc. (ATKR) reported that officer Mark F. Lamps, President, Safety & Infrastructure, acquired 47.2682 shares of Common Stock on 2026-08-28 through a grant/award transaction. The filing explains this represents dividend equivalent units accrued on unvested restricted stock units (RSUs). After this accrual, his direct holdings, including unvested RSUs and related dividend equivalent units, total 35,849.8057 shares.

Positive

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Insider Lamps Mark F.
Role Pres. Safety & Infrastructure
Type Security Shares Price Value
Grant/Award Common Stock F1, F2 47.2682 $0.00 $0.00
Holdings After Transaction: Common Stock — 35,849.8057 shares (Direct)
Footnotes (2)
  1. F1. Represents dividend equivalent units accrued on unvested restricted stock units ("RSUs").
  2. F2. Includes unvested restricted stock units ("RSUs") and amounts accrued for dividend equivalent units on such RSUs.
Shares acquired 47.2682 shares of Common Stock Grant/award (dividend equivalent units) on 2026-08-28
Price per share $0.0000 per share Reporting value for the grant/award acquisition
Total shares following transaction 35,849.8057 shares Direct holdings after the 2026-08-28 transaction, including unvested RSUs and dividend equivalent units
Buy transactions 0 No open-market purchases; only one grant/award acquisition reported
dividend equivalent units financial
"Represents dividend equivalent units accrued on unvested 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.
restricted stock units ("RSUs") financial
"Includes unvested restricted stock units ("RSUs") and amounts accrued"
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.
grant/award acquisition financial
"transaction_action: grant/award acquisition"
Rule 10b5-1 regulatory
"aff_10b5_one is the filing's document-level Rule 10b5-1 checkbox"
Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

What insider transaction did Atkore Inc. (ATKR) report for Mark F. Lamps?
Atkore reported that Mark F. Lamps acquired 47.2682 shares of Common Stock on 2026-08-28 via a grant/award transaction representing dividend equivalent units accrued on unvested RSUs.

How many Atkore (ATKR) shares does Mark F. Lamps hold after this transaction?
After the transaction, Mark F. Lamps directly holds 35,849.8057 shares of Atkore Common Stock, which the filing states includes unvested RSUs and amounts accrued for dividend equivalent units on those RSUs.

What is the nature of the 47.2682 Atkore (ATKR) shares acquired by Mark F. Lamps?
The 47.2682 shares represent dividend equivalent units accrued on unvested restricted stock units (RSUs), rather than a cash purchase on the open market.

Was the reported Atkore (ATKR) insider transaction under a Rule 10b5-1 plan?
No. The filing’s Rule 10b5-1 checkbox is not checked, and there is no footnote indicating that the 2026-08-28 award to Mark F. Lamps was made under a trading plan.

Did Mark F. Lamps sell any Atkore (ATKR) shares in this Form 4?
No. The Form 4 reports only an acquisition of 47.2682 shares as a grant/award of dividend equivalent units. There are no reported sales or dispositions in this filing.

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SEC Form 4
FORM 4UNITED 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)
Director10% Owner
XOfficer (give title below)Other (specify below)
Pres. Safety & Infrastructure
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/28/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock08/28/2026A47.2682(1)A$035,849.8057(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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. Lamps08/31/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR