Institutional portfolios / 13F
ACK Asset Management LLC
A closer look at the portfolio, one quarter at a time.
Sign in to follow Export portfolio ↓ Export quarterly changes ↓- Reported portfolio value
- $856,327,037 As of June 30, 2026
- Positions
- 21 Across disclosed securities
- Top 5 weight
- 33.7% Share of reported value
View SEC filing · Published 2026-08-13 15:08 UTC
Inside the portfolio
Reported holdings
Quarterly comparison unavailable: complete reports and corporate-action evidence are required. Reported holdings remain available below.
| Security | Shares / principal | Reported value | Weight | Adjusted quarterly change |
|---|---|---|---|---|
WMSCOM · WMS
Holding detailsReported CUSIP: 00790R104 Reported row 4 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
390,000 SH | $61,214,400 | 7.15% |
—Comparison unavailable |
HLIOCOM
Holding detailsReported CUSIP: 42328H109 Reported row 10 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
681,000 SH | $60,779,250 | 7.10% |
—Comparison unavailable |
LFUSCOM · LFUS
Holding detailsReported CUSIP: 537008104 Reported row 1 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
125,000 SH | $56,916,250 | 6.65% |
—Comparison unavailable |
JHXCOM
Holding detailsReported CUSIP: G4253H101 Reported row 16 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
2,100,000 SH | $54,978,000 | 6.42% |
—Comparison unavailable |
GTXCOM
Holding detailsReported CUSIP: 366505105 Reported row 14 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
1,500,000 SH | $54,345,000 | 6.35% |
—Comparison unavailable |
CNMCOM · CNM
Holding detailsReported CUSIP: 21874C102 Reported row 7 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
1,090,000 SH | $52,592,500 | 6.14% |
—Comparison unavailable |
EXPCOM · EXP
Holding detailsReported CUSIP: 26969P108 Reported row 2 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
220,000 SH | $49,500,000 | 5.78% |
—Comparison unavailable |
ATSCOM · ATS
Holding detailsReported CUSIP: 00217Y104 Reported row 13 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
1,500,000 SH | $43,170,000 | 5.04% |
—Comparison unavailable |
ASTECOM · ASTE
Holding detailsReported CUSIP: 046224101 Reported row 8 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
690,276 SH | $42,237,988 | 4.93% |
—Comparison unavailable |
MTRNCOM · MTRN
Holding detailsReported CUSIP: 576690101 Reported row 5 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
135,000 SH | $40,147,650 | 4.69% |
—Comparison unavailable |
BWACOM · BWA
Holding detailsReported CUSIP: 099724106 Reported row 6 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
600,000 SH | $39,840,000 | 4.65% |
—Comparison unavailable |
DNOWCOM · DNOW
Holding detailsReported CUSIP: 67011P100 Reported row 17 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
3,000,000 SH | $38,910,000 | 4.54% |
—Comparison unavailable |
MBCCOM · MBC
Holding detailsReported CUSIP: 57638P104 Reported row 18 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
3,700,000 SH | $38,073,000 | 4.45% |
—Comparison unavailable |
SITECOM · SITE
Holding detailsReported CUSIP: 82982L103 Reported row 3 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
330,000 SH | $37,755,300 | 4.41% |
—Comparison unavailable |
SWIMCOM · SWIM
Holding detailsReported CUSIP: 51819L107 Reported row 21 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
5,660,000 SH | $36,620,200 | 4.28% |
—Comparison unavailable |
CLFDCOM · CLFD
Holding detailsReported CUSIP: 18482P103 Reported row 12 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
810,200 SH | $32,237,858 | 3.76% |
—Comparison unavailable |
STCOM · ST
Holding detailsReported CUSIP: G8060N102 Reported row 9 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
600,000 SH | $28,644,000 | 3.34% |
—Comparison unavailable |
AERO-SWXCOM
Holding detailsReported CUSIP: H55555108 Reported row 11 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
1,082,500 SH | $28,460,408 | 3.32% |
—Comparison unavailable |
SHLSCOM · SHLS
Holding detailsReported CUSIP: 82489W107 Reported row 20 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
2,255,000 SH | $22,324,500 | 2.61% |
—Comparison unavailable |
EQPTCOM · EQPT
Holding detailsReported CUSIP: 29445S100 Reported row 15 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
1,064,830 SH | $20,934,558 | 2.44% |
—Comparison unavailable |
MEICOM · MEI
Holding detailsReported CUSIP: 591520200 Reported row 19 · 0001510940-26-000005 Quarterly change unavailable. Security identity or split coverage is incomplete. |
877,500 SH | $16,646,175 | 1.94% |
—Comparison unavailable |