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AAM

ACK Asset Management Portfolio holdings

AUM $801M
1-Year Est. Return 60.42%
This Fund
S&P 500
This Quarter Est. Return
+14.31%
1 Year Est. Return
+60.42%
3 Year Est. Return
+99.73%
5 Year Est. Return
+138.79%
10 Year Est. Return
+1,118.13%
AUM
$799M
AUM Growth
+$37.7M
Cap. Flow
-$14.2M
Cap. Flow %
-1.77%
Top 10 Hldgs %
65.85%
Holding
28
New
7
Increased
5
Reduced
2
Closed
8

Top Buys

Rank Stock Value
1
CNM icon
Core & Main
CNM
+$54.5M
2
JHX icon
James Hardie Industries
JHX
+$50.3M
3
HLIO icon
Helios Technologies
HLIO
+$36M
4
ASTE icon
Astec Industries
ASTE
+$30.7M
5
APOG icon
Apogee Enterprises
APOG
+$30.4M

Top Sells

Rank Stock Value
1
DY icon
Dycom Industries
DY
+$54.9M
2
MYRG icon
MYR Group
MYRG
+$48.1M
3
RRX icon
Regal Rexnord
RRX
+$39.9M
4
MRC
MRC Global
MRC
+$31.1M
5
ATRO icon
Astronics
ATRO
+$30.3M

Sector Composition

Rank Sector Weight
1 Industrials 69.2%
2 Materials 15.61%
3 Consumer Discretionary 8.86%
4 Utilities 3.64%
5 Technology 2.69%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ENS icon
1
EnerSys
ENS
$7.17B
$66M 8.26%
584,324
– –
MTRN icon
2
Materion
MTRN
$5.1B
$63.4M 7.93%
524,800
– –
GVA icon
3
Granite Construction
GVA
$5.43B
$59.8M 7.48%
545,000
– –
ATRO icon
4
Astronics
ATRO
$3.32B
$56.1M 7.02%
1,476,000
-996,000
-40% -$30.3M
WMS icon
5
Advanced Drainage Systems
WMS
$11.3B
$54.1M 6.77%
390,000
+45,000
+13% +$5.91M
JBTM
6
JBT Marel
JBTM
$6.98B
$49.2M 6.16%
350,546
– –
CNM icon
7
Core & Main
CNM
$8.47B
$48.4M 6.06%
+900,000
New +$54.5M
ATS icon
8
ATS Corp
ATS
$2.68B
$48.4M 6.05%
1,846,196
– –
AIN icon
9
Albany International
AIN
$2.11B
$40.5M 5.07%
760,000
+175,000
+30% +$11.1M
JHX icon
10
James Hardie Industries
JHX
$15B
$40.3M 5.05%
+2,100,000
New +$50.3M
HLIO icon
11
Helios Technologies
HLIO
$2.68B
$40.1M 5.02%
+770,000
New +$36M
SITE icon
12
SiteOne Landscape Supply
SITE
$4.6B
$36.1M 4.51%
280,000
+30,000
+12% +$4.07M
ASTE icon
13
Astec Industries
ASTE
$1.27B
$33.8M 4.23%
+701,500
New +$30.7M
APOG icon
14
Apogee Enterprises
APOG
$856M
$30.8M 3.86%
+708,000
New +$30.4M
MBC icon
15
MasterBrand
MBC
$1.11B
$30.3M 3.79%
+2,300,000
New +$28.4M
CTRI icon
16
Centuri Holdings
CTRI
$2.8B
$29.1M 3.64%
1,375,000
-657,000
-32% -$13.9M
CLFD icon
17
Clearfield
CLFD
$416M
$21.5M 2.69%
625,200
– –
EXP icon
18
Eagle Materials
EXP
$6.36B
$21M 2.62%
+90,000
New +$20.4M
NPKI
19
NPK International
NPKI
$1.21B
$17.8M 2.23%
1,576,808
+350,000
+29% +$3.41M
CTOS icon
20
Custom Truck One Source
CTOS
$2.35B
$12.4M 1.55%
1,925,000
+50,000
+3% +$290K
DXPE icon
21
DXP Enterprises
DXPE
$2.6B
– –
-75,600
Closed -$6.63M
DY icon
22
Dycom Industries
DY
$12.2B
– –
-224,700
Closed -$54.9M
MIR icon
23
Mirion Technologies
MIR
$3.91B
– –
-1,337,000
Closed -$28.8M
MRC
24
DELISTED
MRC Global
MRC
– –
-2,267,000
Closed -$31.1M
MTRX icon
25
Matrix Service
MTRX
$342M
– –
-1,087,100
Closed -$14.7M
1
2

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KWMG
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ACK Asset Management's Q3 2025 Portfolio in Review

As of Q3 2025, ACK Asset Management held 28 positions worth $799M, up 5% from $761M the previous quarter. Its ten largest holdings account for 66% of the portfolio.

ACK Asset Management's Q3 2025 filing shows 7 new, 5 increased, 2 reduced and 8 closed positions. Its largest new stake was Core & Main: 900,000 shares worth $48.4M. The largest sale was Dycom Industries, an estimated $54.9M.

By sector, the portfolio is most concentrated in Industrials at 69% of assets, down from 76% a quarter earlier, followed by Materials and Consumer Discretionary.

  • ACK Asset Management's largest Q3 2025 buy was Core & Main: 900,000 shares worth $48.4M.
  • ACK Asset Management added most to Albany International in Q3 2025, an estimated $11.1M increase.
  • ACK Asset Management's biggest Q3 2025 reduction was Astronics, cutting an estimated $30.3M.
  • ACK Asset Management fully exited Dycom Industries in Q3 2025, selling an estimated $54.9M.
  • ACK Asset Management's ten largest holdings make up 66% of its $799M portfolio in Q3 2025.
  • ACK Asset Management opened 7 new positions and closed 8 in Q3 2025.
  • ACK Asset Management's portfolio value rose 5% quarter-over-quarter to $799M.

Based on ACK Asset Management's 13F filing for Q3 2025, filed 14 Nov 2025.