These are the largest manufacturing companies in Louisiana, ranging from industrial machinery and shipbuilding to specialized components and food products. Many are well-established firms, with a significant number founded before the 1970s. Key players include Laitram, a global manufacturing leader with extensive patents, and Intralox, a global leader in conveyance solutions. Stuller, Inc. is a major jewelry manufacturer, while Bollinger Shipyards specializes in offshore and inland vessel construction.
A notable pattern among these companies is the diverse range of manufacturing activities, reflecting a broad industrial base. For example, Hardware Resources manufactures kitchen and bath products, while Metro Aviation, Inc. is an aircraft completion center. Another trend is the presence of companies with long histories, such as MECO, founded in 1928, and Reily Foods Company, established in 1902.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Laitramlaitram.com
A global manufacturing leader with over 3,800 employees, 1300 patents, and 11 locations worldwide, committed to integrity, teamwork, and innovation |
2,789 | |||
| 2 |
Intraloxintralox.com
Global leader in conveyance solutions offering innovative technologies for various industries in over 100 countries, backed by strong guarantees and global support |
2,292 | |||
| 3 |
Hardware Resourceshardwareresources.com
Manufacturer of kitchen cabinet, bath, and closet products since 1990 Offers decorative hardware, vanities, organizers, LED lighting, custom drawer boxes, and more |
1,362 | |||
| 4 |
Stuller, Inc.stuller.com
A jewelry manufacturing company based in Lafayette, Louisiana, offering a wide range of products including bridal jewelry, diamonds, gemstones, tools, and supplies worldwide |
1,206 | |||
| 5 |
Bollinger Shipyardsbollingershipyards.com
Specializes in new construction, repair, and conversion of offshore and inland vessels with steel fabrication across multiple shipyards. |
1,032 | |||
| 6 |
Metro Aviation, Inc.metroaviation.com
Aircraft completion center specializing in installing kits and avionics for air medical, law enforcement, and VIP/corporate customers Also operates aircraft for hospitals |
816 | |||
| 7 |
EPIC Pipingoneepic.com
Leading global industrial pipe fabrication organization with over 500 years of combined experience, offering turn-key solutions for various industries with cutting-edge technology |
675 | |||
| 8 |
DelVal Flow Controlsdelvalflow.com
DelVal Flow Controls offers a diverse range of high-quality valves, actuation accessories, and control systems for various industries worldwide with ISO 9001-2015 compliance |
613 | |||
| 9 |
MECO (Mechanical Equipment Company, Inc.)meco.com
A global leader in designing advanced water purification systems for various industries with locations worldwide, offering valuable and sustainable solutions |
510 | |||
| 10 | 
PT. Soho Industri Pharmasisoho.co.id
A pharmaceutical company based in Shreveport, LA, United States, specializing in the industrial production of medications |
464 | |||
| 11 |
McElroy Metalmcelroymetal.com
A third-generation family-owned metal components company with a national presence, offering quality products and services to the construction industry |
456 | |||
| 12 |
Lion Elastomerslionelastomers.com
A premier manufacturer of high-quality elastomeric polymers, offering top-performing rubber materials and innovative solutions for customer needs and new product development |
397 | |||
| 13 |
Acadian Contractors, Inc.acadiancontractors.com
Provides fabrication and offshore services, including blast, paint, exotic metals, and field services, ensuring projects are completed efficiently and correctly. |
290 | |||
| 14 |
Reily Foods Companyreilyproducts.com
Family-owned food company based in New Orleans manufacturing and marketing a variety of quality food products nationwide, with a focus on growth and innovation |
258 | |||
| 15 |
Smitty's Supply, Inc.smittysinc.net
Leading manufacturer and distributor of lubricants and related products, offering high-quality products at competitive prices Distributes major brand products nationwide and internationally |
234 | |||
| 16 | 233 | ||||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 17 |
AGCOagcocorp.com
An American-based company providing products and services in a specific industry (specific industry not mentioned in the description) |
221 | |||
| 18 |
Calcasieu Refining Companycalcasieurefining.com
An oil and energy company located in Lake Charles, LA, specializing in refining processes and operations related to the oil industry |
118 | |||
| 19 |
CORTECuscortec.com
Design, manufacture, and service of flow control equipment for high-pressure, corrosive, and abrasive fluid applications, meeting API and ISO quality standards |
113 | |||
| 20 |
Alloy Piping Products (APP)alloypipingproducts.com
Integrated manufacturer and distributor of fittings and piping components, providing solutions for power, midstream, refining, chemical, and petrochemical industries worldwide |
82 | |||
| 21 |
GR.A.M.M. GRUPPO ALIMENTARE MEDITERRANEO MILO S.R.L.
Produces all forms of pasta, baked goods, bread substitutes, and gluten-free foods. Engages in local commercialization and wholesale trade. |
72 | |||
| 22 |
Frederick's Manufacturing LLCfredmach1.com
Specializing in CNC machining and manufacturing, this company in Louisiana serves marine, industrial, and oilfield customers with a focus on Sub Sea Structures and Wireline Tools |
51 | |||
| 23 |
MTP Drivetrain Servicesmtpdrivetrain.com
Specializing in remanufacturing drivetrain components for military tactical vehicles, offering immediate exchange and custom programs globally with vast inventory of surplus parts |
43 | |||
| 24 |
Magic Seasoning Blends, LLCmagicseasoningblends.com
A food production company located in Harahan, Louisiana, specializing in creating magic seasoning blends for a variety of culinary applications |
43 | |||
| 25 |
Steel Forgings, Inc.steelforgings.com
Steel Forgings, Inc is an oil & energy company based in Shreveport, LA, specializing in steel manufacturing for the oil industry |
32 | |||
| 26 |
WHITLIEJO SPECIALTY COMPANY, LLCwhitliejospecialty.com
API-6A licensed manufacturing company specializing in oil & energy products such as wellhead equipment, flanges, fittings, seals, and fasteners Located in Louisiana and Texas |
27 | |||
| 27 |
Honironhoniron.com
A global manufacturing solutions provider specializing in industrial process equipment for various industries, offering innovative and cost-effective solutions to operational challenges |
11 | |||
| 28 |
Richter Pumps and Valves USA - A Unit of IDEX Corporationrichter-ct.com
A pioneering manufacturer of lined pumps, valves, and ball valves for challenging production processes, ensuring safe and high-quality operation for over 65 years |
10 | |||
| 29 |
Impact Group- Impact Cooling Solutions, LLCimpactgroupusa.com
An energy solutions provider under the Impact Group, offering energy-saving solutions in the Americas with technical support, warehousing, and logistics services |
6 | |||
| 30 |
Tefsco, LLCtefsco.com
A leading provider of oil and gas energy services, drilling operations, production operations, and pipeline operations equipment and solutions worldwide |
5 | |||
| 31 |
Westport Welding Innovationswestportadditive.com
A materials research and engineering services company specializing in innovative welding techniques and solutions |
4 | |||
| 32 | 1 | ||||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 14, 2026.
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The same list elsewhere
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