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Atkore insider Mark Lamps receives 8,043 RSUs, 1,053 shares withheld

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

Rhea-AI Filing Summary

Atkore Inc. (ATKR) reported insider equity activity for its Pres. Safety & Infrastructure, Mark F. Lamps. On 11/17/2025, he received 8,043 restricted stock units (RSUs) of common stock at a stated price of $0. These RSUs vest in three equal installments on each anniversary of November 17, 2025, subject to continued employment, and will be settled in common stock no later than March 15 of the year following each vesting year.

On 11/18/2025, 1,053 shares of common stock were withheld at $65.10 per share to cover taxes on vested RSUs under Rule 16b-3. After these transactions, Lamps beneficially owned 36,913.126 shares, including unvested RSUs and related dividend equivalent units, held directly.

Positive

  • None.

Negative

  • None.
Insider Lamps Mark F.
Role Pres. Safety & Infrastructure
Type Security Shares Price Value
Tax Withholding Common Stock 1,053 $65.10 $69K
Grant/Award Common Stock 8,043 $0.00 --
Holdings After Transaction: Common Stock — 36,913.126 shares (Direct)
Footnotes (1)
  1. Represents restricted stock units ("RSUs"). The RSUs vest ratably in three installments on each anniversary of November 17, 2025, subject to continued employment. The RSUs settle into common stock of the Issuer no later than March 15th of the calendar year immediately following the calendar year in which vesting occurs. Includes unvested restricted stock units ("RSUs") and amounts accrued for dividend equivalent units on such RSUs. Securities withheld to pay withholding taxes on vested restricted stock units ("RSUs") exempt under Rule 16b-3.
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 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)
Director 10% Owner
X Officer (give title below) Other (specify below)
Pres. Safety & Infrastructure
3. Date of Earliest Transaction (Month/Day/Year)
11/17/2025
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 11/17/2025 A 8,043(1) A $0 37,966.126(2) D
Common Stock 11/18/2025 F 1,053(3) D $65.1 36,913.126(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 restricted stock units ("RSUs"). The RSUs vest ratably in three installments on each anniversary of November 17, 2025, subject to continued employment. The RSUs settle into common stock of the Issuer no later than March 15th of the calendar year immediately following the calendar year in which vesting occurs.
2. Includes unvested restricted stock units ("RSUs") and amounts accrued for dividend equivalent units on such RSUs.
3. Securities withheld to pay withholding taxes on vested restricted stock units ("RSUs") exempt under Rule 16b-3.
Remarks:
/s/ Daniel S. Kelly, Attorney-in-Fact for Mark F. Lamps 11/19/2025
** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Atkore (ATKR) report in this Form 4?

The filing shows that Mark F. Lamps, Pres. Safety & Infrastructure at Atkore Inc., received 8,043 restricted stock units (RSUs) of common stock and had shares withheld to cover taxes on vested RSUs.

How many Atkore (ATKR) RSUs were granted to Mark F. Lamps?

Mark F. Lamps was granted 8,043 RSUs of Atkore common stock on 11/17/2025, with a stated price of $0 per unit.

What is the vesting schedule for the Atkore (ATKR) RSUs?

The 8,043 RSUs vest ratably in three installments on each anniversary of November 17, 2025, subject to continued employment, and settle into common stock no later than March 15 of the calendar year immediately following the year of vesting.

Why were 1,053 Atkore (ATKR) shares withheld from Mark F. Lamps?

1,053 shares of Atkore common stock were withheld on 11/18/2025 at a price of $65.10 per share to pay withholding taxes on vested RSUs, in a transaction exempt under Rule 16b-3.

How many Atkore (ATKR) shares does Mark F. Lamps beneficially own after these transactions?

Following the reported transactions, Mark F. Lamps beneficially owned 36,913.126 shares of Atkore common stock, including unvested RSUs and dividend equivalent units, held directly.

Does this Atkore (ATKR) Form 4 involve derivative securities like options?

The table for derivative securities is present but does not list any specific derivative security transactions in the excerpt, while the detailed activity relates to common stock and RSUs.