Ticker · CUSIP 047649108

ATKR

ATKORE INC

Industrials·Electrical Equipment & Parts

···Share

Holders (tracked)

Combined shares

957,046

Combined value

$60.53M

Last close

$69.12

Quarter

2025Q4

Price is +9.3% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$69.12+11.81 (+20.61%)H $78.39 · L $53.01 · Avg Vol 483K

Tracked holders · last 8 quarters

+1 vs previous quarter over the last 8.

SEC event timeline

21 events

Ken Griffin (Citadel Advisors) added2026-02-17
+49,171 shares · 2025Q4
Position
Two Sigma Investments added2026-02-17
+38,333 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−20,189 shares · 2025Q4
Position
T. Rowe Price trimmed2026-02-17
−2,637 shares · 2025Q4
Position
Wellington Management trimmed2026-02-17
−25,606 shares · 2025Q4
Position
D.E. Shaw & Co. trimmed2026-02-17
−38,147 shares · 2025Q4
Position
Jeremy Grantham (GMO) trimmed2026-02-17
−3,688 shares · 2025Q4
Position
AQR Capital Management trimmed2026-02-17
−4,914 shares · 2025Q4
Position
Norges Bank (Norway SWF) opened position2026-02-10
+89,623 shares · 2025Q4
Position
Mario Gabelli (GAMCO) trimmed2026-02-05
−700 shares · 2025Q4
Position
Two Sigma Investments added2025-11-14
+113,757 shares · 2025Q3
Position
D.E. Shaw & Co. added2025-11-14
+84,437 shares · 2025Q3
Position
Wellington Management trimmed2025-11-14
−69,300 shares · 2025Q3
Position
AQR Capital Management trimmed2025-11-14
−62,581 shares · 2025Q3
Position
Lee Ainslie (Maverick Capital) exited2025-11-14
−14,371 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+1,155 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+25,166 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−6,623 shares · 2025Q3
Position
Jeremy Grantham (GMO) trimmed2025-11-13
−8,692 shares · 2025Q3
Position
Norges Bank (Norway SWF) trimmed2025-11-12
−11,675 shares · 2024Q3
Position
Mario Gabelli (GAMCO) trimmed2025-11-12
−550 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for ATKR →

Follow-the-investor returns

If you'd copied each holder of ATKR…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
T. Rowe Price	2017Q3	$31.61	+118.7%	$2.3M
Wellington Management	2018Q1	$63.00	+9.7%	$13.0M
D.E. Shaw & Co.	2017Q1	$63.36	+9.1%	$346K
D.E. Shaw & Co.	2017Q1	$63.36	+9.1%	$346K
Ken Griffin (Citadel Advisors)	2016Q2	$63.38	+9.1%	$10.2M
Ken Griffin (Citadel Advisors)	2016Q2	$63.38	+9.1%	$10.2M
Ken Griffin (Citadel Advisors)	2016Q2	$63.38	+9.1%	$10.2M
AQR Capital Management	2017Q3	$67.33	+2.7%	$3.4M
Two Sigma Investments	2016Q4	$67.92	+1.8%	$15.2M
Mario Gabelli (GAMCO)	2025Q2	$70.55	-2.0%	$338K
Izzy Englander (Millennium Mgmt)	2016Q2	$87.14	-20.7%	$2.3M
Jeremy Grantham (GMO)	2018Q4	$166.23	-58.4%	$488K
Norges Bank (Norway SWF)	2016Q2	$228.07	-69.7%	$6.2M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions1

Norges Bank (Norway SWF)
+89,623
$5.7M

Added to2

Ken Griffin (Citadel Advisors)
+49,171
$3.1M
Two Sigma Investments
+38,333
$2.4M

Trimmed7

D.E. Shaw & Co.
−38,147
$2.4M
Wellington Management
−25,606
$1.6M
Izzy Englander (Millennium Mgmt)
−20,189
$1.3M
AQR Capital Management
−4,914
$311K
Jeremy Grantham (GMO)
−3,688
$233K
Mario Gabelli (GAMCO)
−700
$44K
T. Rowe Price
−2,637
$167

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	12	5,157,418	$55.89B	—
2022Q2	12	5,363,096	$38.37B	—
2022Q3	15	5,675,720	$441.6M	+3
2022Q4	15	5,439,144	$616.9M	—
2023Q1	18	4,936,522	$693.5M	+3
2023Q2	15	5,796,425	$903.9M	-3
2023Q3	15	5,564,961	$830.2M	—
2023Q4	12	6,031,231	$965.0M	-3
2024Q1	13	5,996,554	$1.14B	+1
2024Q2	13	5,840,265	$788.0M	—
2024Q3	17	2,764,276	$234.2M	+4
2024Q4	16	1,809,900	$151.0M	-1
2025Q1	15	1,747,642	$104.8M	-1
2025Q2	14	885,879	$62.5M	-1
2025Q3	12	927,800	$58.2M	-2
2025Q4	13	957,046	$60.5M	+1

Who owns ATKR

13 super-investors · 2025Q4

Tracked stake

957.0K

Combined value

$61M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New1Added4Trim8

#	Manager	Shares	Value	% of book	Last action
1	Two Sigma Investments	219.3K	$14M	0.0%	Added+38.3K
2	Wellington Management	188.3K	$12M	0.0%	Trim−25.6K
3	Ken Griffin Citadel Advisors	147.7K	$9M	0.0%	Added+49.2K
4	D.E. Shaw & Co.	113.1K	$7M	0.0%	Trim−38.1K
5	Norges Bank Norway SWF	89.6K	$6M	0.0%	New+89.6K
6	AQR Capital Management	49.7K	$3M	0.0%	Trim−4.9K
7	Ken Griffin Citadel Advisors	49.2K	$3M	0.0%	Added+49.2K
8	Izzy Englander Millennium Mgmt	33.2K	$2M	0.0%	Trim−20.2K
9	T. Rowe Price	32.8K	$2M	0.0%	Trim−2.6K
10	Ken Griffin Citadel Advisors	17.2K	$1M	0.0%	Added+49.2K
11	Jeremy Grantham GMO	7.1K	$446K	0.0%	Trim−3.7K
12	D.E. Shaw & Co.	5.0K	$316K	0.0%	Trim−38.1K
13	Mario Gabelli GAMCO	4.9K	$309K	0.0%	Trim−700

Recent moves

20 transactions

TRIMIzzy Englander (Millennium Mgmt)
−20,189 · 2025Q4
TRIMAQR Capital Management
−4,914 · 2025Q4
ADDTwo Sigma Investments
+38,333 · 2025Q4
TRIMWellington Management
−25,606 · 2025Q4
ADDKen Griffin (Citadel Advisors)
+49,171 · 2025Q4
TRIMT. Rowe Price
−2,637 · 2025Q4
TRIMJeremy Grantham (GMO)
−3,688 · 2025Q4
TRIMD.E. Shaw & Co.
−38,147 · 2025Q4
NEWNorges Bank (Norway SWF)
+89,623 · 2025Q4
TRIMMario Gabelli (GAMCO)
−700 · 2025Q4
TRIMAQR Capital Management
−62,581 · 2025Q3
ADDD.E. Shaw & Co.
+84,437 · 2025Q3
ADDT. Rowe Price
+1,155 · 2025Q3
ADDTwo Sigma Investments
+113,757 · 2025Q3
SOLDLee Ainslie (Maverick Capital)
−14,371 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+25,166 · 2025Q3
TRIMWellington Management
−69,300 · 2025Q3
TRIMJeremy Grantham (GMO)
−8,692 · 2025Q3
SOLDNorges Bank (Norway SWF)
−6,623 · 2025Q3
TRIMNorges Bank (Norway SWF)
−11,675 · 2024Q3

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