| # | Company | Employees |
|---|---|---|
| 1 |
Trend Technologiestrendtechnologies.com
A global provider of mechanical solutions specializing in metal stamping, fabrication, and injection molding for Fortune 500 companies Local source with 10 manufacturing locations worldwide |
757 |
| 2 |
Newport Corporationnewport.com
Provider of precision motion control, optical tables, vibration isolation, photonic instruments, optics, and opto-mechanical components for industrial markets. |
717 |
| 3 |
GNB KL Groupvacuumchamber.com
A leading manufacturer of vacuum hardware components for various industries such as semiconductors, medical systems, space exploration, and more |
543 |
| 4 |
Full-Circlefullcircleswivels.com
A leading manufacturer of swivel connectors for rotating liquefied gases and liquids like propane, ammonia, fuel oil, and diesel exhaust fluid |
475 |
| 5 |
Luxfer Gas Cylindersluxfercylinders.com
Manufacturer of light, durable, corrosion-resistant aluminum and composite cylinders for high-pressure gas storage across diverse global markets. |
389 |
| 6 |
Mechanical Engineering Professionals, LLCmechanicalengineeringpros.com
A full-service mechanical engineering design and manufacturing firm specializing in machine design, optics, robotics, medical devices, automation, and nanotechnology |
328 |
| 7 |
TLSturretlathe.com
A family-owned CNC machine shop in Southern California providing precision machining, CNC production, and tooling to aerospace, defense, and other industries since 1973 |
325 |
| 8 |
PENCOMpencomsf.com
A component solutions provider with innovative supply chain management, global manufacturing, inventory logistics, and automated inventory management for OEM design engineers |
318 |
| 9 |
MASS Precision, Inc.massprecision.com
Custom contract manufacturing of electronic chassis, frames, and assemblies with design, fabrication, machining, finishing, and logistics services for various industries. |
216 |
| 10 |
Energy Recovery, Inc.energyrecovery.com
Global leader in energy efficiency technology, specializing in pressure exchanger solutions for various industries to increase efficiency and cost savings |
211 |
| 11 |
Jonathan Engineered Solutionsjonathanengr.com
Manufacturer of precision ball-bearing slides, brackets, trays, sheet metal assemblies, cable management systems, plastic components, and custom engineered products for various industries worldwide |
197 |
| 12 |
McCrometer, Inc.mccrometer.com
A global leader in flow measurement solutions for various industries, offering accurate and reliable flow meters and wireless telemetry systems |
183 |
| 13 |
Hydraulics International, Inc.hiigroup.com
A California-based company supplying integrated products and services to military, aviation, commercial industries, government agencies, and prime contractors worldwide |
162 |
| 14 |
Frank M. Booth, Inc.frankbooth.com
The company offers a range of mechanical services including engineering, design, fabrication, plumbing, piping, and building automation systems for industrial and commercial buildings in Northern California |
153 |
| 15 | 153 | |
| 16 |
RIX Industriesrixindustries.com
Global leader specializing in hydrogen and gas generation, compression solutions, and cryogenic cooling technologies for critical infrastructure markets worldwide |
152 |
| 17 |
Trust Automation, Inc.trustautomation.com
Specializing in custom motors, linear drives, digital drives, and systems for Defense, Semiconductor, Industrial Automation, Greentech, and Medical industries with in-house design and manufacturing capabilities |
151 |
| 18 |
Source Engineering Servicessource-engineering.com
A specialized engineering services company offering design, project management, supplier sourcing, and end-to-end solutions with a focus on innovation and customer partnership |
147 |
| 19 |
Integrated Polymer Solutions (IPS)integratedpolymersolutions.com
A leading developer and manufacturer of advanced materials and engineered components for aerospace, defense, medical, robotics, energy, and industrial markets |
131 |
| 20 |
Enovityenovity.com
A firm of engineers optimizing facilities to maximize performance, energy efficiency, and sustainability, creating healthier environments for productivity and prosperity |
128 |
| 21 | 92 | |
| 22 |
IPD (Industrial Parts Depot, LLC)ipdparts.com
A global leader in manufacturing high-quality repair parts for diesel and natural gas engines, with a focus on innovation, service, and customer support |
80 |
| 23 |
Forecast 3Dforecast3d.com
A leading provider of custom manufacturing and 3D printing services for various industries, offering a wide range of additive manufacturing technologies |
80 |
| 24 |
Fabconfabcon.com
A vertically integrated manufacturing company providing engineering design, sheet metal, machining, assembly, paint, and logistics services to diverse industries worldwide |
78 |
| 25 |
BHI Manufacturing Solutionsbhisolutions.com
Custom metals manufacturer offering metal forming, springs, stampings, wire forms, and sheet metal fabrication with facilities in California and Mexico, specializing in cost-effective solutions |
76 |
| 26 |
Solid Concepts Incstratasys.com
This company combines advanced manufacturing services with engineering expertise from industry leaders to push the limits of design and innovation |
70 |
| 27 |
Verus Associatesverusaec.com
An automation and engineering firm focused on industrial automation, control systems, electrical engineering, and digital manufacturing for various industries |
69 |
| 28 |
Nikkiso America, Inc.nikkisoamerica.com
The company provides innovative technologies and products globally, focusing on aerospace, industrial, medical, and precision equipment divisions to meet customer demands |
65 |
| 29 |
Griswold Controls, LLCgriswoldcontrols.com
Innovative leader in HVAC and irrigation flow control technology, offering high-quality, reliable solutions for industry needs for over 60 years |
63 |
| 30 |
5th Axis Inc.fifthaxis.com
A world leader in automated production, manufacturing, and machining, providing turnkey solutions for product development, assembly, finishing, and logistics with expert mechanical engineering |
61 |
| 31 |
OptoSigmaoptosigma.com
This company provides a wide range of optics, optomechanics, photonics, and other related products for physics laboratories and optical systems |
59 |
| 32 |
Bermingham Controls, Inc.bermingham.com
Provider of fluid control solutions for Southwest Steam and Process Industry with 60+ years experience, delivering engineering-driven, practical solutions and exceptional customer service |
58 |
| 33 |
Delta Hi-Tech Inc.deltahi-tech.com
A leader in precision manufacturing for over 20 years, offering CNC machining, laser cutting, sheet metal fabrication, welding, and assembly services ISO certified |
54 |
| 34 |
EVOLOHevoloh.com
A groundbreaking company revolutionizing clean hydrogen production through advanced liquid alkaline technology for cost-efficient electrolyzer manufacturing at gigawatt scale globally |
45 |
| 35 |
Mantlemantle3d.com
Innovative company in San Francisco utilizing TrueShape metal 3D printing technology to produce precision parts for manufacturing tools, molds, and dies |
43 |
| 36 |
Delafield Corporationdftcorp.com
Full line distributor specializing in engineering, manufacturing, and sales of products utilizing piping, pumps, hoses, valves, and tubing for fluid and gas movement |
43 |
| 37 |
Atlas Copco Mafi-Trench Company LLC
This company based in Santa Maria, California specializes in manufacturing machinery for various industries |
37 |
| 38 |
Asepcoasepco.com
Manufacturer specializing in high quality valves for the biopharmaceutical industry, developed in cooperation with industry experts Part of Watson-Marlow Fluid Technology Group |
32 |
| 39 | 30 | |
| 40 |
Rapid Precision Mfg., Inc.rapidprecision.us
OEM contract manufacturer offering machining services, mechanical assembly, and quality parts to customers with a focus on effective communication and efficient manufacturing solutions |
28 |
| 41 |
Select Equipment Sales, Inc.selectequipment.com
This company provides premium material handling solutions, lift trucks, and industrial vehicles, partnering with businesses to enhance efficiency and sustainability |
27 |
| 42 |
Hazlehurst Inc.hazlehurstinc.com
A high precision machining and manufacturing company specializing in investment casting, die casting, MIM, and assembly manufacturing across various industries worldwide |
27 |
| 43 |
SUTHERLAND & KC PRESSESsutherlandpresses.com
A global provider of high-quality, custom metal forming solutions and services, built-to-order with state-of-the-art components for a diverse range of clients |
27 |
| 44 |
ZPMC NORTH AMERICA INClinkedin.com
A mechanical and industrial engineering company located in Cypress, California, specializing in a wide range of engineering solutions and services |
23 |
| 45 |
Anaheim Automation Inc.anaheimautomation.com
The company specializes in designing, manufacturing, and distributing cost-effective motion control products and services to various industries globally |
22 |
| 46 |
Moseys'โ Production Machinists, Inc.moseys.com
Manufacturer specializing in machined metal and plastic components for various industries, offering value-added services like mechanical assembly, prototyping, and inventory management for turnkey products |
18 |
| 47 |
Staubli Corporationstaubli.com
A machinery company based in California, specializing in innovative solutions for various industries |
15 |
| 48 |
Do It American MFG Company, LLCdoitamerican.com
A manufacturing company in the United States specializing in providing cost-effective, high-quality products with exceptional service and responsiveness |
14 |
| 49 |
Precision Ferrites and Ceramics, Inc.semiceramic.com
A California-based company manufactures high-quality products using advanced ceramic and glass materials tailored to customer specifications for various markets |
14 |
| 50 |
Haig Precision Mfg. Corp.haigprecision.com
The company specializes in precision parts and assemblies for various industries, providing manufacturing options from prototype to production and offering engineering services |
12 |
| 51 |
J&J Machiningjnjmachining.com
Engineering and manufacturing company in Anaheim, CA specializing in precision product manufacturing for aerospace, medical, defense, automotive, and commercial industries Certified AS9100D/ISO9001, with expertise in mechanical design and CNC machining |
12 |
| 52 |
Fivalco Group Co., Limitedfivalco.com
Manufacturer of high-quality flow control products for fire protection, HVAC, water works, and general industries, with a focus on innovative engineering and superior construction |
10 |
| 53 |
Bright Ceramic Technologiesbright-ct.com
An advanced materials company developing cutting-edge components and systems in Palo Alto, California, to commercialize a unique technology platform |
10 |
| 54 |
Innovative Machine Solutionsims-eng.net
Engineering company specializing in precision motion control products and integration services, serving a wide range of industries worldwide with exceptional customer service and innovative solutions |
8 |
| 55 |
D&R MACHINE CO.dandrmachine.com
A privately owned company manufacturing parts, tooling, and automation machines with a focus on providing exceptional service and short lead times |
7 |
| 56 |
V M Techvm-tech.com
A mechanical/industrial engineering company located in California, specializing in providing innovative solutions to clients in various industries |
6 |
| 57 |
Baughn Engineering, Inc.baughneng.com
An engineering and manufacturing company based in Pomona, California, specializing in innovative solutions for various industries |
4 |
| 58 | 4 | |
| 59 |
Adamant Valvesadamantvalves.com
A leading manufacturer of high precision stainless steel sanitary valves, pumps, and fittings for various industries, with a focus on quality, performance, and innovation |
3 |
| 60 |
CHENBRO MICOMUSA INC
A machinery company located in Ontario, California, specializing in manufacturing various equipment and machinery for industrial applications |
3 |
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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 Oct 24, 2026.
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