John M. Deitzer - 19 Oct 2026 Form 4 Insider Report for Atkore Inc. (ATKR)

Reporting relationship: VP, CFO
Issuer ticker: ATKR
Reported as of: 19 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 21 Oct 2026, 16:45:17 UTC
Prior SEC filing: 31 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel S. Kelly, Attorney-in-Fact for John M. Deitzer

Filing notes and source

Key filing fact

John M. Deitzer filed Form 4 for Atkore Inc. (ATKR) on 21 Oct 2026.

Key facts

This page summarizes John M. Deitzer's Form 4 filing for Atkore Inc. (ATKR).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 21 Oct 2026, 16:45.

Change

Previous filing in this sequence was filed on 31 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002035295 Primary reporting owner

Deitzer John Michael

Relationship: VP, CFO
Address: 16100 S. LATHROP AVENUE, HARVEY
Signature: /s/ Daniel S. Kelly, Attorney-in-Fact for John M. Deitzer
Signature date: 21 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ATKR transaction

Common Stock

Award

Transaction value
Shares: +14,558
Change %: +77%
Price: $0.000000^*
Shares after: 33,486
Date: 19 Oct 2026
Ownership: Direct
Footnotes: F1, F2

ATKR transaction

Common Stock

Disposed to Issuer

Transaction value
Shares: -33,486
Change %: -100%
Price: $95.00^*
Shares after: 0
Date: 19 Oct 2026
Ownership: Direct
Footnotes: F1, F3, F4, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

John M. Deitzer is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 5 footnotes

Footnote 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").

Footnote 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.

Footnote 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").

Footnote 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.

Footnote 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.

SEC 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.