| KIKloepfer INC | Paul | ID | — | ◐ LIKELY ACTIVE |
| KSKlotz Sand CO. (asphalt Plant) (portable) (air) | Portable | KS | — | ◐ LIKELY ACTIVE |
| KRKnife River | Parkston, City of | SD | — | ◐ LIKELY ACTIVE |
| KPKnights Precast INC | Summerville | SC | — | ◐ LIKELY ACTIVE |
| KRKnights Redi Mix Moncks Corner Plant 1 | Moncks Corner | SC | — | ◐ LIKELY ACTIVE |
| KMKokosing Materials, Inc. | Fredericktown | OH | 100–499 | ◐ LIKELY ACTIVE |
| KMKokosing Materials INC | East Claridon | OH | — | ◐ LIKELY ACTIVE |
| KMKokosing Materials INC 510 | London | OH | — | ◐ LIKELY ACTIVE |
| KMKokosing Materials, INC. - Plant No 530 | Columbia Station | OH | — | ◐ LIKELY ACTIVE |
| KMKokosing Materials - Plant 521 (0372002004) | Woodville | OH | — | ◐ LIKELY ACTIVE |
| KMKokosing Materials Plant 523 (1667000081) | Brimfield Twp. | OH | — | ◐ LIKELY ACTIVE |
| KMKoss Materials Company LLC (#233) | Portable | KS | — | ◐ LIKELY ACTIVE |
| KRKotter Ready Mix | Paducah | KY | — | ◐ LIKELY ACTIVE |
| KMKrm Midlands LLC - Sumter Plant 14 | Sumter | SC | — | ◐ LIKELY ACTIVE |
| KCKuhlman Corporation - Yard 1 | Toledo | OH | 20–99 | ◐ LIKELY ACTIVE |
| LNLafarge North America INC Andover Ready Mix | Andover | KS | — | ◐ LIKELY ACTIVE |
| LWLafarge West, INC - Lippmann Crusher | Denver | CO | — | ◐ LIKELY ACTIVE |
| LPLake Placid Cbp | Lake Placid | FL | — | ◐ LIKELY ACTIVE |
| LCLakes Concrete Plus | Bemidji | MN | 20–99 | ◐ LIKELY ACTIVE |
| LRLakeside Ready Mix INC. - Plant No 1 | Abingdon | VA | — | ◐ LIKELY ACTIVE |
| LRLakeside Ready Mix INC - Plant No 2 | Marion | VA | — | ◐ LIKELY ACTIVE |
| LCLALC Custom Building Products | Plant City | FL | 20–99 | ◐ LIKELY ACTIVE |
| LCLane Construction | Lee | MA | — | ◐ LIKELY ACTIVE |
| LCLangman Construction | Rock Island | IL | — | ◐ LIKELY ACTIVE |
| LCLasiter Construction | Little Rock | AR | — | ◐ LIKELY ACTIVE |
| LPLASP Pavestone | Las Vegas | NV | 20–99 | ◐ LIKELY ACTIVE |
| LALawaski Asphalt Future Development | Lawrenceburg | TN | — | ◐ LIKELY ACTIVE |
| LRLawrence Redi Mix | Bridgewater | MA | — | ◐ LIKELY ACTIVE |
| LPLbv Prof Svc Llc/montoursville Boro Crem | Montoursville | PA | — | ◐ LIKELY ACTIVE |
| LBLee Brick & Block | Bowling Green | KY | — | ◐ LIKELY ACTIVE |
| LHLee Hy Construction LLC - Warsaw Plant 1 | Warsaw | VA | — | ◐ LIKELY ACTIVE |
| LHLee Hy Paving Corporation - New Kent Facility | Providence Forge | VA | — | ◐ LIKELY ACTIVE |
| LHLee Hy Paving Corporation - Warsaw Plant 1 | Warsaw | VA | — | ◐ LIKELY ACTIVE |
| LMLee Masonry Products INC | Lexington | KY | — | ◐ LIKELY ACTIVE |
| LALeeward Asphalt/palmyra Twp | Hawley | PA | — | ◐ LIKELY ACTIVE |
| LRLehman Roberts | Arlington | TN | — | ◐ LIKELY ACTIVE |
| LRLehman Roberts Company- Plant 7 | Batesville | MS | 1–19 | ◐ LIKELY ACTIVE |
| LCLenawee CO Road Commission | Addison | MI | — | ◐ LIKELY ACTIVE |
| LJLeo Journagan Construction CO | Hollister | MO | — | ◐ LIKELY ACTIVE |
| LDLeoterra Development ** Inactive ** | Greensboro | NC | — | ◐ LIKELY ACTIVE |
| LALewis Aggregates, LLC | Midland City | AL | — | ◐ LIKELY ACTIVE |
| LML-g Materials LLC - Farriston Asphalt Plant | London | KY | — | ◐ LIKELY ACTIVE |
| LSLigonier Stone & Lime Concrete | Latrobe | PA | 1–19 | ◐ LIKELY ACTIVE |
| LCLincoln CO Ready Mix INC | Stanford | KY | — | ◐ LIKELY ACTIVE |
| LRLincoln Ready-mix Concrete | Lincoln | MO | — | ◐ LIKELY ACTIVE |
| LRLincoln Road Builders, INC. | Lewisburg | TN | — | ◐ LIKELY ACTIVE |
| LPLindsay Precast INC. | Franklinton | NC | 20–99 | ◐ LIKELY ACTIVE |
| LPLindsay Precast SC | Rock Hill | SC | 20–99 | ◐ LIKELY ACTIVE |
| LPLindy Paving Inc/zelienople Plt | Zelienople | PA | — | ◐ LIKELY ACTIVE |
| LPLindy Paving - Plant 991 (second Ave) | Pittsburgh | PA | — | ◐ LIKELY ACTIVE |