Company · Ownership research

Atkore Inc. ATKR

CIK 0001666138 · CUSIP 047649108

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 047649108 (ATKR), not CUSIP 047649908 (ATKR), CUSIP 047649958 (ATKR), and does not merge CUSIPs.

This page lists the top 20 of 304 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Gates Capital Management, Inc. CIK 1312908 · View history	$158.22M 2,685,718 shares	5.46%	-47.43K(-1.70%)Reduced	SEC filing ↗ May 15, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$154.74M 2,626,791 shares	0.00%	+71.09K(+2.80%)Added	SEC filing ↗ May 13, 2026	▾
03	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$123.15M 2,090,469 shares	0.01%	—	SEC filing ↗ May 8, 2026	▾
04	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$89.26M 1,515,110 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
05	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$84.78M 1,439,116 shares	0.04%	+185.57K(+14.80%)Added	SEC filing ↗ May 15, 2026	▾
06	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$72.34M 1,227,991 shares	0.02%	+97.51K(+8.60%)Added	SEC filing ↗ May 7, 2026	▾
07	FIRST TRUST ADVISORS LP CIK 1125816 · View history	$72.27M 1,226,840 shares	0.05%	-158.90K(-11.50%)Reduced	SEC filing ↗ May 13, 2026	▾
08	LSV ASSET MANAGEMENT CIK 1050470 · View history	$61.97M 1,051,861 shares	0.13%	+91.41K(+9.50%)Added	SEC filing ↗ May 11, 2026	▾
09	Coliseum Capital Management, LLC CIK 1409751 · View history	$55.79M 947,070 shares	4.57%	+137.76K(+17.00%)Added	SEC filing ↗ May 15, 2026	▾
10	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$50.36M 854,731 shares	0.00%	+52.52K(+6.50%)Added	SEC filing ↗ May 15, 2026	▾
11	STATE STREET CORP CIK 93751 · View history	$49.20M 835,156 shares	0.00%	+7.63K(+0.90%)Added	SEC filing ↗ May 15, 2026	▾
12	EARNEST PARTNERS LLC CIK 1102578 · View history	$45.83M 777,905 shares	0.19%	-5.83K(-0.70%)Reduced	SEC filing ↗ May 15, 2026	▾
13	Hill City Capital, LP CIK 1837343 · View history	$42.90M 728,206 shares	1.53%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
14	Harding Loevner LP CIK 928196 · View history	$41.54M 704,862 shares	0.43%	-27.89K(-3.80%)Reduced	SEC filing ↗ May 15, 2026	▾
15	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$41.13M 698,134 shares	0.02%	-6.53K(-0.90%)Reduced	SEC filing ↗ May 14, 2026	▾
16	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. CIK 1705339 · View history	$31.40M 532,992 shares	0.04%	+181.71K(+51.70%)Added	SEC filing ↗ May 15, 2026	▾
17	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$27.23M 462,278 shares	0.00%	+42.59K(+10.10%)Added	SEC filing ↗ May 18, 2026	▾
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$24.60M 417,644 shares	0.00%	+6.67K(+1.60%)Added	SEC filing ↗ May 15, 2026	▾
19	GENDELL JEFFREY L CIK 1056581 · View history	$23.58M 400,214 shares	0.32%	+13.01K(+3.40%)Added	SEC filing ↗ May 15, 2026	▾
20	VICTORY CAPITAL MANAGEMENT INC CIK 1040188 · View history	$22.34M 379,274 shares	0.01%	-113.04K(-23.00%)Reduced	SEC filing ↗ May 15, 2026	▾

Showing 20 / 304 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

304

Cancelled or null records excluded

Disclosed shares

32,489,726

Not deduplicated across managers

Disclosed value

$1.91B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Atkore Inc. · Q1 2026

Explore all 304 reporting institutions.

This page includes 20 of 304 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.