Atkore Inc.
Atkore Inc. (ATKR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · ATKR · as of Sep 30, 2025
Ownership Breakdown
316
Institutional Holders
▲ 10 vs Q2
$2.03B
Total Inst. Value
▼ $295.24M vs Q2
33.77M
Shares Outstanding
freeFloat 90.87%
32.32M
13F Shares Held
▼ 477,517 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
ATKR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC miscellaneous electrical machinery, equipment & supplies | 3.63M | 10.79% | 10.79% | $227.91B | Nov 7, 2025 | ▲ 273.5K |
GATES CAPITAL MANAGEMENT, INC. miscellaneous electrical machinery, equipment & supplies | 2.94M | 8.75% | 8.75% | $184.71B | Nov 14, 2025 | ▲ 315.9K |
BLACKROCK, INC. miscellaneous electrical machinery, equipment & supplies | 2.61M | 7.76% | 7.76% | $163.84B | Nov 12, 2025 | ▼ 62.7K |
FIRST TRUST ADVISORS LP miscellaneous electrical machinery, equipment & supplies | 1.17M | 3.47% | 3.47% | $73.24B | Nov 12, 2025 | ▼ 590.4K |
AMERICAN CENTURY COMPANIES INC miscellaneous electrical machinery, equipment & supplies | 1.16M | 3.44% | 3.44% | $72.66B | Nov 12, 2025 | ▲ 144.8K |
DIMENSIONAL FUND ADVISORS LP miscellaneous electrical machinery, equipment & supplies | 1.04M | 3.08% | 3.08% | $65.00B | Nov 12, 2025 | ▲ 19.0K |
VICTORY CAPITAL MANAGEMENT INC miscellaneous electrical machinery, equipment & supplies | 1.00M | 2.98% | 2.98% | $62.98B | Nov 12, 2025 | ▼ 8.0K |
LSV ASSET MANAGEMENT miscellaneous electrical machinery, equipment & supplies | 907.6K | 2.70% | 2.70% | $56.94B | Nov 6, 2025 | ▲ 19.8K |
HARDING LOEVNER LP miscellaneous electrical machinery, equipment & supplies | 896.0K | 2.66% | 2.66% | $56.22B | Nov 14, 2025 | ▼ 442.2K |
STATE STREET CORP miscellaneous electrical machinery, equipment & supplies | 835.0K | 2.48% | 2.48% | $52.39B | Nov 14, 2025 | ▼ 38.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
26
Increased
+2.90M shares4
New Positions
first time holders19
Decreased
−2.77M shares0
Sold Out
fully exitedNet shares change (top 50)
+129.7K
+2.90M / −2.77M
Net new holders
+11
4 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
ATKR insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
1
Buy transactions
3
Sell transactions
0.33
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Edmonds Franklin S. Jr. director | May 29, 2026 | Award | 11.247 | — | — | 2.8K | Form 4 ↗ |
Zeffiro A Mark director | May 29, 2026 | Award | 54.434 | — | — | 23.9K | Form 4 ↗ |
WYNN BETTY R. director | May 29, 2026 | Award | 31.387 | — | — | 20.6K | Form 4 ↗ |
Kelly Daniel S VP, General Counsel and Sec. | May 29, 2026 | Award | 40.949 | — | — | 32.6K | Form 4 ↗ |
Lamps Mark F. Pres. Safety & Infrastructure | May 29, 2026 | Award | 53.215 | — | — | 36.1K | Form 4 ↗ |
James Wilbert W Jr director | May 29, 2026 | Award | 67.993 | — | — | 17.1K | Form 4 ↗ |
Edwards Barbara Joanne director | May 29, 2026 | Award | 20.407 | — | — | 6.1K | Form 4 ↗ |
Waltz William E Jr. President and CEO | May 29, 2026 | Award | 271.908 | — | — | 123.4K | Form 4 ↗ |
Isbell Jeri L director | May 29, 2026 | Award | 110.18 | — | — | 30.6K | Form 4 ↗ |
Deitzer John Michael VP, CFO | May 29, 2026 | Award | 53.259 | — | — | 18.9K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Atkore Inc. (ATKR) is primarily owned by institutional investors, who hold approximately 95.7% of total shares outstanding. Company insiders own approximately 9.13%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Atkore Inc. is VANGUARD GROUP INC, holding approximately 3.63 million shares — equal to 10.79% of outstanding shares — as of September 30, 2025.
A total of 316 institutional investors currently hold ATKR stock, with a combined institutional value of approximately $2.03 billion as of the most recent 13F filing period.
Frequently asked questions
ATKR ownershipAtkore Inc. (ATKR) is primarily owned by institutional investors, who hold approximately 95.7% of shares. The largest shareholder is VANGUARD GROUP INC with a 10.79% stake. Company insiders hold 9.13%. Data sourced from SEC Form 13F as of September 30, 2025.