ACK Asset Management LLC
CIK 1510940 · Holdings on Dec 31, 2023 · First reported Feb 13, 2024
Top ten holdings
Q4 2023- MTRN7.52%
- DY7.41%
- MTZ7.03%
- ENS6.95%
- ATKR6.93%
- ATS6.76%
- CNM6.57%
- ROG6.52%
- ZWS6.01%
- JBI5.33%
Share classes counted separately67.03%
Portfolio value by quarter
What changed this quarter?
Within preview · weight change- EMEWeight decreased · -2.37 pp7.03% → 4.66%Shares -50.00K (-21.74%)
- MTZWeight increased · +1.75 pp5.28% → 7.03%Shares +267.30K (+52.93%)
- ARRYWeight increased · +1.73 pp2.74% → 4.47%Shares +1.36M (+160.19%)
Weight = security value ÷ total reported holdings value. Changes are in percentage points; price moves also affect weights, so they are not trade sizes.
Top 10 holdings 21
USD · B = billion · M = million; expand a row for exact values| # | Security | Value | Weight | Quantity | Weight / quantity change | Activity | |
|---|---|---|---|---|---|---|---|
| 01 | MTRNMATERION CORP View history and evidence | $62.53M | 7.52% | 480.50K shares | 7.11% → 7.52%+0.41 pp 0 (0.00%) | Unchanged | ↗▾ |
| 02 | DYDYCOM INDUSTRIES INC View history and evidence | $61.63M | 7.41% | 535.50K shares | Prior unavailable +535.50K | New | ↗▾ |
| 03 | MTZMASTEC INC View history and evidence | $58.48M | 7.03% | 772.30K shares | 5.28% → 7.03%+1.75 pp +267.30K (+52.93%) | Added | ↗▾ |
| 04 | ENSENERSYS View history and evidence | $57.80M | 6.95% | 572.50K shares | 7.87% → 6.95%-0.92 pp 0 (0.00%) | Unchanged | ↗▾ |
| 05 | ATKRATKORE INC View history and evidence | $57.60M | 6.93% | 360.00K shares | 7.80% → 6.93%-0.87 pp 0 (0.00%) | Unchanged | ↗▾ |
| 06 | ATSATS CORP View history and evidence | $56.21M | 6.76% | 1.30M shares | 7.56% → 6.76%-0.80 pp +83.64K (+6.85%) | Added | ↗▾ |
| 07 | CNMCORE & MAIN INC-CLASS A View history and evidence | $54.63M | 6.57% | 1.35M shares | 5.47% → 6.57%+1.10 pp +47.00K (+3.60%) | Added | ↗▾ |
| 08 | ROGROGERS CORP View history and evidence | $54.18M | 6.52% | 410.20K shares | 7.07% → 6.52%-0.55 pp +40.20K (+10.86%) | Added | ↗▾ |
| 09 | ZWSZURN ELKAY WATER SOLUTIONS C View history and evidence | $50.00M | 6.01% | 1.70M shares | 6.92% → 6.01%-0.91 pp 0 (0.00%) | Unchanged | ↗▾ |
| 10 | JBIJANUS INTERNATIONAL GROUP IN View history and evidence | $44.30M | 5.33% | 3.39M shares | Prior unavailable +3.39M | New | ↗▾ |
Options overlay 0
No options reported this quarter.
Exited positions 3
| Security | Type | Shares out | Value out | Previous filing | This filing |
|---|---|---|---|---|---|
| HLIO HELIOS TECHNOLOGIES INC | Non-derivative | -535,000 | -$29.68M | SEC filing ↗ | SEC filing ↗ |
| VMI VALMONT INDUSTRIES | Non-derivative | -110,000 | -$26.42M | SEC filing ↗ | SEC filing ↗ |
| ERII ENERGY RECOVERY INC | Non-derivative | -877,400 | -$18.61M | SEC filing ↗ | SEC filing ↗ |
3 / 3 preview exits. Up to 30 exit records are previewed. Exit means absent from the current filing; execution date, price and proceeds are unknown.
Every number has a source.
CIK 1510940 · Period 2023-12-31
Data loaded 2026-09-23 · First reported 2024-02-13
Amendments and versions
{
"amendments_merged": null,
"prior_versions": null,
"cover_table_value": 831322503
}Take these holdings further.
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