Atkore International Group Inc
Ownership
Ownership Structure
Who owns Atkore International Group Inc (ATKR)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 94.2% of the shares are freely tradable; institutional investors hold 98.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 9.23 | 3,116,222 | +18.6 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 6.28 | 2,122,380 | +1.5 | 06/30/2026 |
| American Century Companies Inc | 5.26 | 1,775,158 | +23.4 | 06/30/2026 |
| Gates Capital Management Inc | 5.06 | 1,710,192 | -36.3 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.51 | 1,524,252 | +0.6 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 3.85 | 1,299,786 | +5.8 | 06/30/2026 |
| LSV Asset Management | 3.24 | 1,093,590 | +4.0 | 06/30/2026 |
| State Street Corp | 2.68 | 906,421 | +8.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Avantis US Small Cap Value ETF | 5.56 | 1,879,302 | +0.3 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.20 | 1,081,920 | +0.3 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 19, 2026 | Deitzer John Michael | VP, CFO | Other | 33,486 | 95.00 | 3,181,170 |
| Oct 19, 2026 | Deitzer John Michael | VP, CFO | Other | 14,558 | 0.00 | – |
| Oct 19, 2026 | Alvey James William | Chief Accounting Officer | Other | 6,449 | 95.00 | 612,655 |
| Oct 19, 2026 | Alvey James William | Chief Accounting Officer | Other | 1,000 | 0.00 | – |
| Oct 19, 2026 | Edmonds Franklin S. Jr. | Director | Other | 2,844 | 95.00 | 270,180 |
| Oct 19, 2026 | Pregenzer John W | COO & President, Electrical | Other | 80,228 | 95.00 | 7,621,660 |
| Oct 19, 2026 | Pregenzer John W | COO & President, Electrical | Other | 18,817 | 0.00 | – |
| Oct 19, 2026 | Lowe LeAngela W. | VP, Chief HR Officer | Other | 46,361 | 95.00 | 4,404,295 |
| Oct 19, 2026 | Lowe LeAngela W. | VP, Chief HR Officer | Other | 10,298 | 0.00 | – |
| Oct 19, 2026 | Lamps Mark F. | Pres. Safety & Infrastructure | Other | 49,238 | 95.00 | 4,677,610 |
| Oct 19, 2026 | Lamps Mark F. | Pres. Safety & Infrastructure | Other | 13,388 | 0.00 | – |
| Oct 19, 2026 | Edwards Barbara Joanne | Director | Other | 6,099 | 95.00 | 579,405 |
| Oct 19, 2026 | Kershaw Justin A | Director | Other | 18,750 | 95.00 | 1,781,250 |
| Oct 19, 2026 | James Wilbert W Jr | Director | Other | 17,191 | 95.00 | 1,633,145 |
| Oct 19, 2026 | Waltz William E Jr. | President and CEO | Other | 36,836 | 95.00 | 3,499,420 |
| Oct 19, 2026 | Waltz William E Jr. | President and CEO | Other | 191,623 | 95.00 | 18,204,185 |
| Oct 19, 2026 | Waltz William E Jr. | President and CEO | Other | 67,970 | 0.00 | – |
| Oct 19, 2026 | Kelly Daniel S | VP, General Counsel and Sec. | Other | 42,964 | 95.00 | 4,081,580 |
| Oct 19, 2026 | Kelly Daniel S | VP, General Counsel and Sec. | Other | 10,298 | 0.00 | – |
| Oct 19, 2026 | Zeffiro A Mark | Director | Other | 23,994 | 95.00 | 2,279,430 |
| Oct 19, 2026 | Wynn Betty R. | Director | Other | 20,616 | 95.00 | 1,958,520 |
| Oct 19, 2026 | Muse Scott H | Director | Other | 32,724 | 95.00 | 3,108,780 |
| Oct 19, 2026 | Isbell Jeri L | Director | Other | 30,656 | 95.00 | 2,912,320 |
| Oct 19, 2026 | Schrock Michael V | Director | Other | 22,187 | 95.00 | 2,107,765 |
| Aug 28, 2026 | Deitzer John Michael | VP, CFO | Other | 47 | 0.00 | – |
| Aug 28, 2026 | Alvey James William | Chief Accounting Officer | Other | 9 | 0.00 | – |
| Aug 28, 2026 | Edmonds Franklin S. Jr. | Director | Other | 10 | 0.00 | – |
| Aug 28, 2026 | Pregenzer John W | COO & President, Electrical | Other | 82 | 0.00 | – |
| Aug 28, 2026 | Lowe LeAngela W. | VP, Chief HR Officer | Other | 36 | 0.00 | – |
| Aug 28, 2026 | Lamps Mark F. | Pres. Safety & Infrastructure | Other | 47 | 0.00 | – |
| Aug 28, 2026 | Edwards Barbara Joanne | Director | Other | 18 | 0.00 | – |
| Aug 28, 2026 | Kershaw Justin A | Director | Other | 66 | 0.00 | – |
| Aug 28, 2026 | James Wilbert W Jr | Director | Other | 60 | 0.00 | – |
| Aug 28, 2026 | Waltz William E Jr. | President and CEO | Other | 242 | 0.00 | – |
| Aug 28, 2026 | Kelly Daniel S | VP, General Counsel and Sec. | Other | 36 | 0.00 | – |
| Aug 28, 2026 | Zeffiro A Mark | Director | Other | 48 | 0.00 | – |
| Aug 28, 2026 | Wynn Betty R. | Director | Other | 28 | 0.00 | – |
| Aug 28, 2026 | Muse Scott H | Director | Other | 95 | 0.00 | – |
| Aug 28, 2026 | Isbell Jeri L | Director | Other | 98 | 0.00 | – |
| Aug 28, 2026 | Schrock Michael V | Director | Other | 8 | 0.00 | – |
| Aug 10, 2026 | Lamps Mark F. | Pres. Safety & Infrastructure | Sell | 300 | 93.75 | 28,125 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 16, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.