Filed: 8/13/2026ACC: 0001510940-26-000005
📋 What this filing means
ACK ASSET MANAGEMENT LLC filed this quarterly 13F‑HR report disclosing 21 equity positions with a total reported market value of $856.33M. This filing provides a transparent view of the manager's long equity holdings as of the quarter end.
21
Positions
$856.33M
Total AUM (reported)
28.41M
Total Shares
Allocation by class
COM$856.33M100.0%
Portfolio Concentration
Top 3$178.91M20.9%
4–10$336.97M39.4%
11–25$340.45M39.8%
Top 3 weight
20.9%
Top 10 weight
60.2%
Voting Authority Distribution
Total shares with voting rights: 28.41M
Sole
Full voting authority
28.41M
shares
% of voting shares100.0%
Shared
Joint voting authority
0.00
shares
% of voting shares0.0%
None
No voting authority
0.00
shares
% of voting shares0.0%
Investment Discretion (by position count)
Sole21
Shared0
Other0
Dominant voting typeSole · 100.0% of voting shares
Institutional Holdings21
Rows:
WMS
SOLEShares390K
TypeSH
Market value$61.21M
7.15%
Sole
390K
Shared
0.00
None
0.00
HLIO
SOLEShares681K
TypeSH
Market value$60.78M
7.10%
Sole
681K
Shared
0.00
None
0.00
LFUS
SOLEShares125K
TypeSH
Market value$56.92M
6.65%
Sole
125K
Shared
0.00
None
0.00
JHX
SOLEShares2.10M
TypeSH
Market value$54.98M
6.42%
Sole
2.10M
Shared
0.00
None
0.00
GTX
SOLEShares1.50M
TypeSH
Market value$54.34M
6.35%
Sole
1.50M
Shared
0.00
None
0.00
CNM
SOLEShares1.09M
TypeSH
Market value$52.59M
6.14%
Sole
1.09M
Shared
0.00
None
0.00
EXP
SOLEShares220K
TypeSH
Market value$49.50M
5.78%
Sole
220K
Shared
0.00
None
0.00
ATS
SOLEShares1.50M
TypeSH
Market value$43.17M
5.04%
Sole
1.50M
Shared
0.00
None
0.00
ASTE
SOLEShares690.28K
TypeSH
Market value$42.24M
4.93%
Sole
690.28K
Shared
0.00
None
0.00
MTRN
SOLEShares135K
TypeSH
Market value$40.15M
4.69%
Sole
135K
Shared
0.00
None
0.00
BWA
SOLEShares600K
TypeSH
Market value$39.84M
4.65%
Sole
600K
Shared
0.00
None
0.00
DNOW
SOLEShares3M
TypeSH
Market value$38.91M
4.54%
Sole
3M
Shared
0.00
None
0.00
MBC
SOLEShares3.70M
TypeSH
Market value$38.07M
4.45%
Sole
3.70M
Shared
0.00
None
0.00
SITE
SOLEShares330K
TypeSH
Market value$37.76M
4.41%
Sole
330K
Shared
0.00
None
0.00
SWIM
SOLEShares5.66M
TypeSH
Market value$36.62M
4.28%
Sole
5.66M
Shared
0.00
None
0.00
CLFD
SOLEShares810.20K
TypeSH
Market value$32.24M
3.76%
Sole
810.20K
Shared
0.00
None
0.00
ST
SOLEShares600K
TypeSH
Market value$28.64M
3.34%
Sole
600K
Shared
0.00
None
0.00
AERO-SWX
SOLEShares1.08M
TypeSH
Market value$28.46M
3.32%
Sole
1.08M
Shared
0.00
None
0.00
SHLS
SOLEShares2.25M
TypeSH
Market value$22.32M
2.61%
Sole
2.25M
Shared
0.00
None
0.00
EQPT
SOLEShares1.06M
TypeSH
Market value$20.93M
2.44%
Sole
1.06M
Shared
0.00
None
0.00
MEI
SOLEShares877.50K
TypeSH
Market value$16.65M
1.94%
Sole
877.50K
Shared
0.00
None
0.00
| Issuer | Class | Shares | Type | Value / Portfolio % | Voting — Sole | Shared | None |
|---|---|---|---|---|---|---|---|
WMSSOLE | COM | 390K | SH | $61.21M 7.15% | 390K | 0.00 | 0.00 |
HLIOSOLE | COM | 681K | SH | $60.78M 7.10% | 681K | 0.00 | 0.00 |
LFUSSOLE | COM | 125K | SH | $56.92M 6.65% | 125K | 0.00 | 0.00 |
JHXSOLE | COM | 2.10M | SH | $54.98M 6.42% | 2.10M | 0.00 | 0.00 |
GTXSOLE | COM | 1.50M | SH | $54.34M 6.35% | 1.50M | 0.00 | 0.00 |
CNMSOLE | COM | 1.09M | SH | $52.59M 6.14% | 1.09M | 0.00 | 0.00 |
EXPSOLE | COM | 220K | SH | $49.50M 5.78% | 220K | 0.00 | 0.00 |
ATSSOLE | COM | 1.50M | SH | $43.17M 5.04% | 1.50M | 0.00 | 0.00 |
ASTESOLE | COM | 690.28K | SH | $42.24M 4.93% | 690.28K | 0.00 | 0.00 |
MTRNSOLE | COM | 135K | SH | $40.15M 4.69% | 135K | 0.00 | 0.00 |
BWASOLE | COM | 600K | SH | $39.84M 4.65% | 600K | 0.00 | 0.00 |
DNOWSOLE | COM | 3M | SH | $38.91M 4.54% | 3M | 0.00 | 0.00 |
MBCSOLE | COM | 3.70M | SH | $38.07M 4.45% | 3.70M | 0.00 | 0.00 |
SITESOLE | COM | 330K | SH | $37.76M 4.41% | 330K | 0.00 | 0.00 |
SWIMSOLE | COM | 5.66M | SH | $36.62M 4.28% | 5.66M | 0.00 | 0.00 |
CLFDSOLE | COM | 810.20K | SH | $32.24M 3.76% | 810.20K | 0.00 | 0.00 |
STSOLE | COM | 600K | SH | $28.64M 3.34% | 600K | 0.00 | 0.00 |
AERO-SWXSOLE | COM | 1.08M | SH | $28.46M 3.32% | 1.08M | 0.00 | 0.00 |
SHLSSOLE | COM | 2.25M | SH | $22.32M 2.61% | 2.25M | 0.00 | 0.00 |
EQPTSOLE | COM | 1.06M | SH | $20.93M 2.44% | 1.06M | 0.00 | 0.00 |
MEISOLE | COM | 877.50K | SH | $16.65M 1.94% | 877.50K | 0.00 | 0.00 |