ACK Asset Management’s Core & Main CNM Stock Holding History

ACK Asset Management’s Portfolio CNM Stock Details CNM Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$52.6M	Buy	1,090,000 +190,000	+21%	+$9.39M	6.14%	6
2026 Q1	$44.5M	Hold	900,000	–	–	5.55%	7
2025 Q4	$46.8M	Hold	900,000	–	–	5.87%	5
2025 Q3	$48.4M	Buy	+900,000	New	+$54.5M	6.06%	7
2024 Q3	–	Sell	-1,352,000	Closed	-$66.2M	–	20
2024 Q2	$66.2M	Hold	1,352,000	–	–	8.17%	5
2024 Q1	$77.4M	Hold	1,352,000	–	–	9.02%	1
2023 Q4	$54.6M	Buy	1,352,000 +47,000	+4%	+$1.59M	6.57%	7
2023 Q3	$37.6M	Buy	1,305,000 +150,000	+13%	+$4.63M	5.47%	8
2023 Q2	$36.2M	Buy	1,155,000 +330,000	+40%	+$8.84M	4.51%	11
2023 Q1	$19.1M	Buy	+825,000	New	+$18.2M	2.91%	14

Other funds holding CNM

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Select Equity Group New York $20.2B AUM 17.52% 1-Year Est. Return

Royal London Asset Management United Kingdom $54.3B AUM 39.21% 1-Year Est. Return

ACK Asset Management's CNM Position: Q2 2026 in Review

ACK Asset Management increased its Core & Main (CNM) stake by 21% in Q2 2026, buying an estimated $9.39M and bringing the position to 1,090,000 shares worth $52.6M. The position accounts for 6.14% of the portfolio, ranked #6.

ACK Asset Management first reported a position in CNM in Q1 2023 and has held it in 10 quarters since. The position peaked at $77.4M in Q1 2024. 454 funds tracked by Wall St. Rank hold CNM as of Q2 2026.

ACK Asset Management held 1,090,000 shares of Core & Main worth $52.6M as of Q2 2026.
ACK Asset Management bought 190,000 Core & Main shares in Q2 2026, an estimated $9.39M.
Core & Main made up 6.14% of ACK Asset Management's portfolio in Q2 2026, its #6 holding.
ACK Asset Management first reported a position in Core & Main in Q1 2023 and has held it in 10 quarters since.
ACK Asset Management's Core & Main position peaked at $77.4M in Q1 2024.
454 funds tracked by Wall St. Rank held Core & Main as of Q2 2026.

Based on ACK Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.