13F-HR filed by ACK Asset Management LLC
ACK Asset Management LLC filed this 13F-HR for the quarter ended 2025-12-31, filed 2026-02-13, with 23 holding rows worth $796,756,840.
- Accession
- 0001510940-26-000001
- Filer
- CIK 1510940
- Filed
- 2026-02-13
- Accepted by EDGAR
- acceptance time not in the bulk data set
- Ingested
- Source
- SEC quarterly data set
13F report for Q4 2025
A holdings report, 23 entries on the cover page, a total value of $796,756,840 stated on the cover page (in dollars after the unit check, H1), rows summing to $796,756,840 with VALUE read as dollars as filed, 13F file number 028-14060. The quarter's positions are built on this report. The resolved quarter.
The information table after summing rows of one CUSIP and put or call (H4), with the CUSIP and issuer name as filed. Values in dollars after the unit check (method).
| Issuer as filed | CUSIP | Class | Amount | Value | Value read as | Type |
|---|---|---|---|---|---|---|
| MATERION CORP | 576690101 | COM | 474,800 | $59,027,136 | dollars as filed | |
| GRANITE CONSTR INC COM | 387328107 | Stock | 500,000 | $57,675,000 | dollars as filed | |
| ADVANCED DRAIN SYS INC DEL COM | 00790R104 | Stock | 390,000 | $56,483,700 | dollars as filed | |
| ATS CORPORATION | 00217Y104 | COM | 1,846,196 | $50,844,238 | dollars as filed | |
| CORE & MAIN INC CL A | 21874C102 | Stock | 900,000 | $46,773,000 | dollars as filed | |
| ENERSYS COM | 29275Y102 | Stock | 304,324 | $44,659,547 | dollars as filed | |
| NOVANTA INC | 67000B104 | COM | 375,000 | $44,621,250 | dollars as filed | |
| JAMES HARDIE INDS PLC ORD SHS | G4253H101 | Stock | 2,100,000 | $43,575,000 | dollars as filed | |
| HELIOS TECHNOLOGIES INC | 42328H109 | COM | 780,378 | $41,742,419 | dollars as filed | |
| SITEONE LANDSCAPE SUPPLY INC | 82982L103 | COM | 330,000 | $41,104,800 | dollars as filed | |
| ROGERS CORP COM | 775133101 | Stock | 436,707 | $39,989,260 | dollars as filed | |
| EAGLE MATLS INC COM | 26969P108 | Stock | 165,000 | $34,102,200 | dollars as filed | |
| ASTEC INDS INC | 046224101 | COM | 786,500 | $34,071,180 | dollars as filed | |
| ASTRONICS CORP COM | 046433108 | Stock | 597,469 | $32,406,719 | dollars as filed | |
| ALBANY INTL CORP | 012348108 | CL A | 600,000 | $30,420,000 | dollars as filed | |
| APOGEE ENTERPRISES INC | 037598109 | COM | 813,000 | $29,601,330 | dollars as filed | |
| DXP ENTERPRISES INC | 233377407 | COM NEW | 240,000 | $26,349,600 | dollars as filed | |
| MASTERBRAND INC | 57638P104 | COMMON STOCK | 2,300,000 | $25,392,000 | dollars as filed | |
| CARDINAL INFRASTRUCTURE GR A | 14154A102 | COMMON STOCK | 844,591 | $20,422,210 | dollars as filed | |
| CLEARFIELD INC | 18482P103 | COMMON STOCK | 625,200 | $18,224,580 | dollars as filed | |
| ENERGY RECOVERY INC | 29270J100 | COM | 677,251 | $9,136,116 | dollars as filed | |
| AERO-SWX | H55555108 | COM | 154,851 | $5,526,772 | dollars as filed | |
| CUSTOM TRUCK ONE SOURCE INC | 23204X103 | COM CL A | 800,136 | $4,608,783 | dollars as filed |
Amendment chain
| Filing | Role | Filed | Accepted | Ingested |
|---|---|---|---|---|
| 13F-HR 0001510940-26-000001 | this filing | 2026-02-13 | acceptance time not in the bulk data set |