Atkore CFO transfers 33,486 shares to issuer

Prysmian S.p.A. became Atkore's parent when Atkore survived the merger as its wholly owned subsidiary.

Rhea-AI Filing Summary

Atkore Inc. VP, CFO John Michael Deitzer reported that 14,558 shares underlying unvested performance restricted stock units became earned in connection with the October 19, 2026 merger. He also reported a disposition to the issuer of 33,486 shares at $95.00 per share. The merger terms provided cash consideration for common shares converted and cash payments for outstanding restricted stock units and earned performance units.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Deitzer John Michael

Role VP, CFO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1, F2	14,558.2926	$0.00	$0.00
Disposition	Common Stock F1, F3, F4, F5	33,486.3428	$95.00	$3.18M

Holdings After Transaction: Common Stock — 0 shares (Direct)

Footnotes (5)

1. F1. On October 19, 2026 (the "Closing Date"), pursuant to the Agreement and Plan of Merger, dated August 2, 2026 (the "Merger Agreement"), by and among Atkore Inc. ("Atkore" or the "Company"), Prysmian S.p.A., a company organized under the laws of the Republic of Italy ("Buyer"), Trinity Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Buyer ("Merger Sub"), and, solely as provided in certain sections of the Merger Agreement, Prysmian Cables and Systems USA, LLC, a Delaware limited liability company, Merger Sub merged with and into the Company (the "Merger"), with the Company surviving the Merger as a wholly owned subsidiary of Buyer (the "Surviving Corporation").
2. F2. Represents the number of shares of Common Stock underlying unvested performance restricted stock units (a "PSU"), that became earned in connection with the Merger (including any amounts accrued for dividend equivalent units), determined in accordance with the terms of each such PSU.
3. F3. At the effective time of the Merger (the "Effective Time"), each share of common stock of Atkore, par value $0.01 per share ("Common Stock") issued and outstanding immediately prior to the Effective Time, was (except as otherwise provided in the Merger Agreement) converted into the right to receive $95.00 in cash, without interest (the "Merger Consideration").
4. F4. Includes restricted stock units ("RSUs") and any amounts accrued for dividend equivalent units thereon. Under the Merger Agreement, at the Effective Time, each outstanding RSU, whether vested or unvested, was deemed fully vested and canceled and converted into the right to receive a cash payment from the Surviving Corporation equal to the product of (A) the Merger Consideration and (B) the total number of shares of Common Stock underlying such RSU.
5. F5. Includes PSUs and any amounts accrued for dividend equivalent units thereon. Under the Merger Agreement, at the Effective Time, each outstanding PSU that became earned in connection with the Merger was canceled and converted into the right to receive a cash payment from the Surviving Corporation equal to the product of (A) the Merger Consideration and (B) the total number of shares of Common Stock underlying such PSU, as determined in accordance with the terms of each such PSU.

Key Figures

Shares underlying unvested performance restricted stock units earned: 14,558 shares Shares disposed to issuer: 33,486 shares Reported transaction price: $95.00 per share

3 metrics

Shares underlying unvested performance restricted stock units earned 14,558 shares In connection with the merger on October 19, 2026

Shares disposed to issuer 33,486 shares October 19, 2026

Reported transaction price $95.00 per share Disposition to issuer on October 19, 2026

Key Terms

performance restricted stock units, Merger Consideration, dividend equivalent units, Effective Time

4 terms

performance restricted stock units financial

"unvested performance restricted stock units (a "PSU")"

Performance restricted stock units (PRSUs) are promises to deliver company shares to employees or executives only if the business meets specific performance targets and any time-based holding rules. Think of them as a bonus that converts into stock only after set goals are reached, so investors watch PRSUs for two reasons: they can dilute existing shares if paid out, and they signal how closely management’s pay is tied to company performance.

Merger Consideration financial

"the "Merger Consideration""

Merger consideration is the total payment a company or buyer offers to shareholders of a target company in exchange for combining the two businesses, and can include cash, shares in the surviving company, debt assumption, or a mix of these. Investors care because the form and amount affect the deal’s value, tax consequences, immediate cash received versus future ownership, and the risk and upside of holding new shares — similar to choosing between cash now or stock that could grow later.

dividend equivalent units financial

"amounts accrued for dividend equivalent 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.

Effective Time financial

"At the effective time of the Merger (the "Effective Time")"

The exact clock time when a regulatory filing, approval, or corporate action formally becomes legally active; from that moment the change is binding and can be acted on. Investors care because the effective time marks when ownership, rights, trading rules, or new securities take effect — like a light switch turning on a contract or transaction — which determines when risks, benefits and market reactions begin.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many ATKR shares did John Michael Deitzer report as earned and disposed?

He reported 14,558 shares underlying unvested performance restricted stock units that became earned and a disposition to the issuer of 33,486 shares on October 19, 2026.

What merger consideration did ATKR report per share?

Each common share issued and outstanding immediately before the Effective Time, except as otherwise provided in the merger agreement, was converted into the right to receive $95.00 in cash, without interest. Outstanding RSUs and earned PSUs were converted into cash payments based on the merger consideration.

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

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Available on EDGAR 10/21/2026 - 04:49 PM EDT Accepted by SEC EDGAR 10/21/2026 - 04:45 PM EDT 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

X

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^*

Deitzer John Michael

(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)
	VP, CFO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/19/2026

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	10/19/2026		A(1)		14,558.2926(2)	A	$0	33,486.3428	D
Common Stock	10/19/2026		D(1)		33,486.3428	D	$95(3)(4)(5)	0	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. On October 19, 2026 (the "Closing Date"), pursuant to the Agreement and Plan of Merger, dated August 2, 2026 (the "Merger Agreement"), by and among Atkore Inc. ("Atkore" or the "Company"), Prysmian S.p.A., a company organized under the laws of the Republic of Italy ("Buyer"), Trinity Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Buyer ("Merger Sub"), and, solely as provided in certain sections of the Merger Agreement, Prysmian Cables and Systems USA, LLC, a Delaware limited liability company, Merger Sub merged with and into the Company (the "Merger"), with the Company surviving the Merger as a wholly owned subsidiary of Buyer (the "Surviving Corporation").

2. Represents the number of shares of Common Stock underlying unvested performance restricted stock units (a "PSU"), that became earned in connection with the Merger (including any amounts accrued for dividend equivalent units), determined in accordance with the terms of each such PSU.

3. At the effective time of the Merger (the "Effective Time"), each share of common stock of Atkore, par value $0.01 per share ("Common Stock") issued and outstanding immediately prior to the Effective Time, was (except as otherwise provided in the Merger Agreement) converted into the right to receive $95.00 in cash, without interest (the "Merger Consideration").

4. Includes restricted stock units ("RSUs") and any amounts accrued for dividend equivalent units thereon. Under the Merger Agreement, at the Effective Time, each outstanding RSU, whether vested or unvested, was deemed fully vested and canceled and converted into the right to receive a cash payment from the Surviving Corporation equal to the product of (A) the Merger Consideration and (B) the total number of shares of Common Stock underlying such RSU.

5. Includes PSUs and any amounts accrued for dividend equivalent units thereon. Under the Merger Agreement, at the Effective Time, each outstanding PSU that became earned in connection with the Merger was canceled and converted into the right to receive a cash payment from the Surviving Corporation equal to the product of (A) the Merger Consideration and (B) the total number of shares of Common Stock underlying such PSU, as determined in accordance with the terms of each such PSU.

Remarks:

The foregoing descriptions in the explanatory footnotes are qualified in their entirety by reference to the terms of the Merger Agreement. In the event of any conflict between the descriptions above and the terms set forth in the Merger Agreement, the terms set forth in the Merger Agreement shall control.

	/s/ Daniel S. Kelly, Attorney-in-Fact for John M. Deitzer	10/21/2026
	** 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)