13F reference period
Q3 2026
Security Snapshot
Atkore Inc. - Common Stock (ATKR) Institutional Ownership
CUSIP: 047649108
13F Institutional Holders and Ownership History from Q2 2016 to Q3 2026
Institutions Reporting
144
Shares (Excl. Options)
16.28M
Full value: 16,278,311 · shares · 30 Sep 2026Price
$94.75
The headline uses the Q3 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended.
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- Security type / class
- Equity / Common Stock
- Symbol
- ATKR
- All holders as of 30 Sep 2026
- Q3 2026
- Total 13F shares
- 16,278,311
- Total 13F value
- $1,539,459,421
- Portfolio coverage rank
- 0%
- Share change
- +930,586
- Value change
- +$128,736,122
- Number of holders
- 144
- Shares outstanding
- 33,795,220
- SEC-reported price per share
- $94.75
- Insider filing price
- $94.75
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- ATKR - Atkore Inc. - Common Stock is tracked under CUSIP 047649108.
- 144 institutions reported positions in Q3 2026.
- 6 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 325 to 144 between Q2 2026 and Q3 2026.
- SEC-reported value moved from to
$2.5B
Full value: $2,498,974,859 · USD · 30 Jun 2026.$1.54B
Full value: $1,539,459,421 · USD · 30 Sep 2026
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 144 institutions filings for Q3 2026.
Security key
047649108
13F reference period
Q3 2026
13F holders
144
13D/G owners
6
CIK / CUSIP context first
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 047649108:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
6
Security
ATKR
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 7.3% | $154,504,335 | 2,462,609 | BlackRock, Inc. | 30 Sep 2025 | |||
| AMERICAN CENTURY INVESTMENT MANAGEMENT INC | 5.3% | $134,983,014 | 1,775,158 | American Century Investment Management, Inc. | 30 Jun 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.2% | $104,470,171 | 1,773,377 | Vanguard Capital Management | 31 Mar 2026 | |||
| Gates Capital Management, Inc. | 5.1% | -34% | $130,043,000 | -$69,804,492 | 1,710,192 | -35% | Gates Capital Management, L.P. | 30 Jun 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5% | -21% | $160,104,855 | -$40,527,986 | 1,689,761 | -20% | Vanguard Portfolio Management | 30 Sep 2026 |
| FIRST TRUST PORTFOLIOS LP | 3.9% | -22% | $81,974,453 | -$26,000,209 | 1,306,574 | -24% | First Trust Portfolios L.P. | 30 Sep 2025 |
As of 30 Sep 2026,
144
institutional investors reported holding
shares of
Atkore Inc. - Common Stock (ATKR).
This represents
48%
of the company’s total
outstanding shares.
16.28M
Full value: 16,278,311 · shares · 30 Sep 202633.8M
Full value: 33,795,220 · shares · Stored outstanding share count13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
44%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| AMERICAN CENTURY COMPANIES INC | 6.6% | 2,229,447 | +26% | 0.09% | $211,240,122 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5% | 1,675,565 | -21% | 0.01% | $158,759,784 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.5% | 1,523,829 | -0.03% | 0% | $144,382,798 |
| First Trust Capital Management L.P. | 3.9% | 1,333,296 | 6.1% | $126,329,796 | |
| STATE STREET CORP | 2.7% | 897,085 | -1% | 0% | $84,998,804 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.7% | 895,843 | -0.74% | 0% | $84,897,384 |
| Hill City Capital, LP | 2.1% | 724,106 | 0% | 2.3% | $68,609,044 |
| DIMENSIONAL FUND ADVISORS LP | 2.1% | 722,951 | -44% | 0.01% | $68,499,774 |
| Magnetar Financial LLC | 1.9% | 636,351 | +11111% | 0.59% | $60,294,257 |
| FIL Ltd | 1.8% | 612,000 | 0.04% | $57,987,000 | |
| Qube Research & Technologies Ltd | 1.6% | 546,384 | +207% | 0.05% | $51,769,884 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.2% | 409,918 | -15% | 0.02% | $38,839,731 |
| PICTON MAHONEY ASSET MANAGEMENT | 1% | 351,809 | +639553% | 0.27% | $33,333,917 |
| GENDELL JEFFREY L | 0.93% | 315,350 | -21% | 0.31% | $29,879,413 |
| Grantham, Mayo, Van Otterloo & Co. LLC | 0.76% | 257,110 | +3754% | 0.05% | $24,361,173 |
| SOROS FUND MANAGEMENT LLC | 0.68% | 231,148 | 0.34% | $21,901,273 | |
| VANGUARD FIDUCIARY TRUST CO | 0.66% | 223,913 | -0.03% | 0% | $21,215,757 |
| MORGAN STANLEY | 0.55% | 186,572 | -51% | 0% | $17,677,793 |
| WATER ISLAND CAPITAL LLC | 0.54% | 182,000 | 1.8% | $17,244,500 | |
| RENAISSANCE TECHNOLOGIES LLC | 0.47% | 158,100 | 0.02% | $14,979,975 | |
| Chicago Capital Management, LLC | 0.39% | 130,451 | 8.5% | $9,426,393 | |
| GABELLI FUNDS LLC | 0.37% | 125,413 | 0.08% | $11,882,882 | |
| GARDNER LEWIS ASSET MANAGEMENT L P | 0.37% | 124,586 | 2.8% | $11,804,524 | |
| Transmarket Holdings LP | 0.31% | 106,084 | 5.6% | $10,051,459 | |
| NATIXIS | 0.31% | 105,742 | 0.04% | $10,019,055 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
42
Headline period
Q3 2026
Rows shown
1-25 of 42
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 16,278,311 | $1,539,459,421 | +$128,736,122 | $94.75 | 144 |
| 2026 Q2 | 32,896,878 | $2,498,974,859 | +$54,711,841 | $76.04 | 325 |
| 2026 Q1 | 32,489,711 | $1,914,258,390 | -$16,557,553 | $58.91 | 302 |
| 2025 Q4 | 31,988,936 | $2,023,652,713 | -$23,825,100 | $63.25 | 306 |
| 2025 Q3 | 32,263,319 | $2,024,894,475 | -$44,046,024 | $62.74 | 295 |
| 2025 Q2 | 32,795,224 | $2,321,952,503 | -$48,513,360 | $70.55 | 290 |
| 2025 Q1 | 33,550,272 | $2,012,730,322 | -$304,894,543 | $59.99 | 291 |
| 2024 Q4 | 37,323,975 | $3,111,923,794 | +$91,408,379 | $83.45 | 325 |
| 2024 Q3 | 36,054,204 | $3,055,403,985 | -$433,225,562 | $84.74 | 359 |
| 2024 Q2 | 39,520,389 | $5,334,744,181 | -$58,627,328 | $134.93 | 443 |
| 2024 Q1 | 39,260,233 | $7,474,224,397 | +$92,664,569 | $190.36 | 447 |
| 2023 Q4 | 39,277,126 | $6,283,627,517 | +$45,736,485 | $160.00 | 438 |
| 2023 Q3 | 38,822,549 | $5,791,038,643 | -$12,062,658 | $149.19 | 408 |
| 2023 Q2 | 38,767,298 | $6,044,399,356 | +$65,868,945 | $155.94 | 404 |
| 2023 Q1 | 38,340,558 | $5,385,793,882 | -$86,569,697 | $140.48 | 388 |
| 2022 Q4 | 39,441,763 | $4,475,639,060 | -$185,135,193 | $113.42 | 362 |
| 2022 Q3 | 41,162,279 | $3,203,299,572 | +$33,234,386 | $77.81 | 288 |
| 2022 Q2 | 40,809,864 | $3,389,233,466 | -$74,233,562 | $83.01 | 308 |
| 2022 Q1 | 41,789,145 | $4,121,533,124 | -$113,479,329 | $98.44 | 314 |
| 2021 Q4 | 42,895,506 | $4,766,357,492 | -$268,496,052 | $111.19 | 308 |
| 2021 Q3 | 43,793,954 | $3,812,339,996 | -$14,461,364 | $86.92 | 271 |
| 2021 Q2 | 43,848,485 | $3,113,322,980 | -$92,455,728 | $71.00 | 250 |
| 2021 Q1 | 45,149,585 | $3,247,306,884 | +$33,845,469 | $71.90 | 237 |
| 2020 Q4 | 45,116,690 | $1,855,129,814 | -$41,454,962 | $41.11 | 185 |
| 2020 Q3 | 46,405,771 | $1,054,955,378 | -$488,269 | $22.73 | 176 |