2026 Q2 Portfolio Activity
In 2026 Q2, ACK Asset Management LLC maintained a portfolio of 27 distinct positions. The most significant new addition was GTX, now representing 6.35% of the total fund value. They heavily accumulated shares in JHX, increasing the position by 153.0%. Conversely, ACK Asset Management LLC completely exited their position in ROG.
Position History
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Total Positions
27
Quarter
2026 Q2
Top Holding
WMS (7.1%)
Top 10 Concentration
60.2%
Turnover Rate
23.4%
Sector HHI
0.18
Items per page:
Showing 1-27 of 27
ACK Asset Management LLC Full Holdings List — 2026 Q2
| Stock | History | Sector / Type | Port % | Prev % | Rank / Prev | Conviction | Change | % Change | Influence | Shares | Mkt Value | Avg Cost | Price Held | 1st Owned | Source | Source Date | Date Reported | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
WMS
WMS
|
Industrials | 7.15% | 6.68% |
#1
1
Prev: #2
|
5.9 |
—
|
no change | no change |
P
S
|
390,000 | $61,214,400 | 2014 Q3 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
HLIO
HLIO
|
Industrials | 7.10% | 6.30% |
#2
3
Prev: #5
|
4.8 |
—
|
-99,378 | -12.7% |
P
S
|
681,000 | $60,779,250 | 2020 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
LFUS
LFUS
|
Technology | 6.65% | 5.72% |
#3
3
Prev: #6
|
4.2 |
—
|
-10,000 | -7.4% |
P
S
|
125,000 | $56,916,250 | 2026 Q1 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
N/A
JHX
|
|
Unknown | 6.42% | 4.96% |
#4
7
Prev: #11
|
4.1 |
—
|
no change | no change |
P
S
|
2,100,000 | $54,978,000 | — | 13F Filing | 2026-06-30 | 2026-08-13 | ||
|
GTX
GTX
|
Consumer Cyclical | 6.35% | — |
#5
Prev: #—
|
6.5 |
—
|
1,500,000 | — |
NEW
|
1,500,000 | $54,345,000 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
CNM
CNM
|
Industrials | 6.14% | 5.55% |
#6
1
Prev: #7
|
5.0 |
—
|
190,000 | 21.1% |
P
S
|
1,090,000 | $52,592,500 | 2023 Q1 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
EXP
EXP
|
Basic Materials | 5.78% | 3.90% |
#7
7
Prev: #14
|
4.8 |
—
|
55,000 | 33.3% |
P
S
|
220,000 | $49,500,000 | 2015 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
ATS
ATS
|
Industrials | 5.04% | 6.50% |
#8
5
Prev: #3
|
2.5 |
—
|
-346,196 | -18.8% |
P
S
|
1,500,000 | $43,170,000 | 2022 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
ASTE
ASTE
|
Industrials | 4.93% | 5.29% |
#9
1
Prev: #10
|
2.5 |
—
|
-96,224 | -12.2% |
P
S
|
690,276 | $42,237,988 | 2014 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
MTRN
MTRN
|
Basic Materials | 4.69% | 8.57% |
#10
9
Prev: #1
|
1.9 |
—
|
-339,800 | -71.6% |
P
S
|
135,000 | $40,147,650 | 2012 Q1 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
BWA
BWA
|
Consumer Cyclical | 4.65% | — |
#11
Prev: #—
|
5.4 |
—
|
600,000 | — |
NEW
|
600,000 | $39,840,000 | 2024 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
DNOW
DNOW
|
Industrials | 4.54% | — |
#12
Prev: #—
|
5.3 |
—
|
3,000,000 | — |
NEW
|
3,000,000 | $38,910,000 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
MBC
MBC
|
Consumer Cyclical | 4.45% | 3.84% |
#13
2
Prev: #15
|
2.8 |
—
|
no change | no change |
P
S
|
3,700,000 | $38,073,000 | 2024 Q3 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
SITE
SITE
|
Industrials | 4.41% | 5.48% |
#14
5
Prev: #9
|
2.8 |
—
|
no change | no change |
P
S
|
330,000 | $37,755,300 | 2025 Q1 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
SWIM
SWIM
|
Industrials | 4.28% | 3.46% |
#15
3
Prev: #18
|
3.7 |
—
|
500,000 | 9.7% |
P
S
|
5,660,000 | $36,620,200 | 2021 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
CLFD
CLFD
|
Technology | 3.76% | 2.43% |
#16
4
Prev: #20
|
3.5 |
—
|
75,000 | 10.2% |
P
S
|
810,200 | $32,237,858 | 2023 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
ST
ST
|
Technology | 3.34% | — |
#17
Prev: #—
|
4.8 |
—
|
600,000 | — |
NEW
|
600,000 | $28,644,000 | 2012 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
N/A
AERO-SWX
|
|
Unknown | 3.32% | 3.35% |
#18
1
Prev: #19
|
3.8 |
—
|
252,500 | 30.4% |
P
S
|
1,082,500 | $28,460,408 | — | 13F Filing | 2026-06-30 | 2026-08-13 | ||
|
SHLS
SHLS
|
Technology | 2.61% | — |
#19
Prev: #—
|
4.5 |
—
|
2,255,000 | — |
NEW
|
2,255,000 | $22,324,500 | 2026 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
N/A
EQPT
|
|
Unknown | 2.44% | — |
#20
Prev: #—
|
4.5 |
—
|
1,064,830 | — |
NEW
|
1,064,830 | $20,934,558 | — | 13F Filing | 2026-06-30 | 2026-08-13 | ||
|
MEI
MEI
|
Technology | 1.94% | — |
#21
Prev: #—
|
4.3 |
—
|
877,500 | — |
NEW
|
877,500 | $16,646,175 | 2016 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
CTS
CTS
|
Technology | 0.00% | 3.48% |
Sold All 😨
(Was: #17) |
0.0 |
—
|
-584,000 | -100.0% |
CLOSED
|
— | $— | 2022 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
GVA
GVA
|
Industrials | 0.00% | 3.74% |
Sold All 😨
(Was: #16) |
0.0 |
—
|
-250,000 | -100.0% |
CLOSED
|
— | $— | 2011 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
CDNL
CDNL
|
Industrials | 0.00% | 4.33% |
Sold All 😨
(Was: #13) |
0.0 |
—
|
-874,000 | -100.0% |
CLOSED
|
— | $— | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
DXPE
DXPE
|
Industrials | 0.00% | 4.53% |
Sold All 😨
(Was: #12) |
0.0 |
—
|
-260,000 | -100.0% |
CLOSED
|
— | $— | 2025 Q2 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
NOVT
NOVT
|
Technology | 0.00% | 5.53% |
Sold All 😨
(Was: #8) |
0.0 |
—
|
-375,000 | -100.0% |
CLOSED
|
— | $— | 2025 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 | |||
|
ROG
ROG
|
Technology | 0.00% | 6.36% |
Sold All 😨
(Was: #4) |
0.0 |
—
|
-475,000 | -100.0% |
CLOSED
|
— | $— | 2010 Q4 | 13F Filing | 2026-06-30 | 2026-08-13 |
Showing 1-27 of 27 holdings