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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
+2.67%
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
$797M
AUM Growth
-$2.38M
Cap. Flow
-$17.3M
Cap. Flow %
-2.17%
Top 10 Hldgs %
61.06%
Holding
26
New
6
Increased
5
Reduced
6
Closed
3

Top Buys

Rank Stock Value
1
NOVT icon
Novanta
NOVT
+$42.7M
2
ROG icon
Rogers Corp
ROG
+$37.5M
3
DXPE icon
DXP Enterprises
DXPE
+$26.1M
4
CDNL
Cardinal Infrastructure Group
CDNL
+$20.8M
5
EXP icon
Eagle Materials
EXP
+$16.6M

Top Sells

Rank Stock Value
1
JBTM
JBT Marel
JBTM
+$49.2M
2
ENS icon
EnerSys
ENS
+$37.4M
3
ATRO icon
Astronics
ATRO
+$31.8M
4
CTRI icon
Centuri Holdings
CTRI
+$29.1M
5
NPKI
NPK International
NPKI
+$17.8M

Sector Composition

Rank Sector Weight
1 Industrials 62.24%
2 Materials 17.16%
3 Technology 12.91%
4 Consumer Discretionary 7%
5 Utilities 0%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MTRN icon
1
Materion
MTRN
$5.1B
$59M 7.41%
474,800
-50,000
-10% -$6.17M
GVA icon
2
Granite Construction
GVA
$5.43B
$57.7M 7.24%
500,000
-45,000
-8% -$4.84M
WMS icon
3
Advanced Drainage Systems
WMS
$11.3B
$56.5M 7.09%
390,000
– –
ATS icon
4
ATS Corp
ATS
$2.68B
$50.8M 6.38%
1,846,196
– –
CNM icon
5
Core & Main
CNM
$8.47B
$46.8M 5.87%
900,000
– –
ENS icon
6
EnerSys
ENS
$7.17B
$44.7M 5.61%
304,324
-280,000
-48% -$37.4M
NOVT icon
7
Novanta
NOVT
$5.3B
$44.6M 5.6%
+375,000
New +$42.7M
JHX icon
8
James Hardie Industries
JHX
$15B
$43.6M 5.47%
2,100,000
– –
HLIO icon
9
Helios Technologies
HLIO
$2.68B
$41.7M 5.24%
780,378
+10,378
+1% +$559K
SITE icon
10
SiteOne Landscape Supply
SITE
$4.6B
$41.1M 5.16%
330,000
+50,000
+18% +$6.33M
ROG icon
11
Rogers Corp
ROG
$2.36B
$40M 5.02%
+436,707
New +$37.5M
EXP icon
12
Eagle Materials
EXP
$6.36B
$34.1M 4.28%
165,000
+75,000
+83% +$16.6M
ASTE icon
13
Astec Industries
ASTE
$1.27B
$34.1M 4.28%
786,500
+85,000
+12% +$3.88M
ATRO icon
14
Astronics
ATRO
$3.32B
$32.4M 4.07%
716,963
-759,037
-51% -$31.8M
AIN icon
15
Albany International
AIN
$2.11B
$30.4M 3.82%
600,000
-160,000
-21% -$8.29M
APOG icon
16
Apogee Enterprises
APOG
$856M
$29.6M 3.72%
813,000
+105,000
+15% +$3.97M
DXPE icon
17
DXP Enterprises
DXPE
$2.6B
$26.3M 3.31%
+240,000
New +$26.1M
MBC icon
18
MasterBrand
MBC
$1.11B
$25.4M 3.19%
2,300,000
– –
CDNL
19
Cardinal Infrastructure Group
CDNL
$1.42B
$20.4M 2.56%
+844,591
New +$20.8M
CLFD icon
20
Clearfield
CLFD
$416M
$18.2M 2.29%
625,200
– –
ERII icon
21
Energy Recovery
ERII
$444M
$9.14M 1.15%
+677,251
New +$10.3M
CTOS icon
22
Custom Truck One Source
CTOS
$2.35B
$4.61M 0.58%
800,136
-1,124,864
-58% -$6.87M
CTRI icon
23
Centuri Holdings
CTRI
$2.8B
– –
-1,375,000
Closed -$29.1M
NPKI
24
NPK International
NPKI
$1.21B
– –
-1,576,808
Closed -$17.8M
JBTM
25
JBT Marel
JBTM
$6.98B
– –
-350,546
Closed -$49.2M

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ACK Asset Management's Q4 2025 Portfolio in Review

As of Q4 2025, ACK Asset Management held 26 positions worth $797M, down 0.3% from $799M the previous quarter. Its ten largest holdings account for 61% of the portfolio.

ACK Asset Management's Q4 2025 filing shows 6 new, 5 increased, 6 reduced and 3 closed positions. Its largest new stake was Novanta: 375,000 shares worth $44.6M. The largest sale was JBT Marel, an estimated $49.2M.

By sector, the portfolio is most concentrated in Industrials at 62% of assets, down from 69% a quarter earlier, followed by Materials and Technology.

  • ACK Asset Management's largest Q4 2025 buy was Novanta: 375,000 shares worth $44.6M.
  • ACK Asset Management added most to Eagle Materials in Q4 2025, an estimated $16.6M increase.
  • ACK Asset Management's biggest Q4 2025 reduction was EnerSys, cutting an estimated $37.4M.
  • ACK Asset Management fully exited JBT Marel in Q4 2025, selling an estimated $49.2M.
  • ACK Asset Management's ten largest holdings make up 61% of its $797M portfolio in Q4 2025.
  • ACK Asset Management opened 6 new positions and closed 3 in Q4 2025.
  • ACK Asset Management's portfolio value fell 0.3% quarter-over-quarter to $797M.

Based on ACK Asset Management's 13F filing for Q4 2025, filed 13 Feb 2026.