Magnetar Financial’s Atkore ATKR Stock Holding History

Magnetar Financial’s Portfolio ATKR Stock Details ATKR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$1.5M	Buy	25,460 +6,223	+32%	+$405K	0.02%	375
2025 Q4	$1.22M	Buy	+19,237	New	+$1.26M	0.01%	411
2025 Q3	–	Sell	-9,243	Closed	-$652K	–	894
2025 Q2	$652K	Buy	+9,243	New	+$599K	﹤0.01%	503
2025 Q1	–	Sell	-11,848	Closed	-$989K	–	733
2024 Q4	$989K	Sell	11,848 -31,243	-73%	-$2.75M	0.02%	278
2024 Q3	$3.65M	Buy	43,091 +11,382	+36%	+$1.24M	0.08%	180
2024 Q2	$4.28M	Buy	+31,709	New	+$5.05M	0.09%	134
2023 Q4	–	Sell	-4,925	Closed	-$735K	–	378
2023 Q3	$735K	Buy	+4,925	New	+$743K	0.02%	279
2022 Q4	–	Sell	-30,128	Closed	-$2.34M	–	782
2022 Q3	$2.34M	Buy	30,128 +18,963	+170%	+$1.64M	0.03%	541
2022 Q2	$927	Buy	+11,165	New	+$1.11M	0.01%	998
2017 Q2	–	Sell	-10,455	Closed	-$275K	–	784
2017 Q1	$275K	Buy	+10,455	New	+$269K	﹤0.01%	590

Other funds holding ATKR

GCM

Gates Capital Management New York $3.66B AUM 12.63% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

LSV Asset Management Chicago, Illinois $46.4B AUM 27.74% 1-Year Est. Return

CCM

Coliseum Capital Management Rowayton, Connecticut $1.22B AUM 18.72% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Magnetar Financial's ATKR Position: Q1 2026 in Review

Magnetar Financial increased its Atkore (ATKR) stake by 32% in Q1 2026, buying an estimated $405K and bringing the position to 25,460 shares worth $1.5M. The position accounts for 0.02% of the portfolio, ranked #375.

Magnetar Financial first reported a position in ATKR in Q1 2017 and has held it in 10 quarters since. The position peaked at $4.28M in Q2 2024. 303 funds tracked by Wall St. Rank hold ATKR as of Q1 2026.

Magnetar Financial held 25,460 shares of Atkore worth $1.5M as of Q1 2026.
Magnetar Financial bought 6,223 Atkore shares in Q1 2026, an estimated $405K.
Atkore made up 0.02% of Magnetar Financial's portfolio in Q1 2026, its #375 holding.
Magnetar Financial first reported a position in Atkore in Q1 2017 and has held it in 10 quarters since.
Magnetar Financial's Atkore position peaked at $4.28M in Q2 2024.
303 funds tracked by Wall St. Rank held Atkore as of Q1 2026.

Based on Magnetar Financial's 13F filing for Q1 2026, filed 13 May 2026.