# The 26 largest companies in Port Washington

Tamtam tracks 26 companies headquartered in Port Washington. This list ranks all of them by number of employees on LinkedIn, led by Pall Corporation, KMC and Global Industrial Company. Their median headcount is 334. Half of them were founded in 1949 or later.

The companies in Port Washington are predominantly mid-sized firms, with a strong presence in manufacturing and wholesale. Many of these companies, such as Pall Corporation and KMC, have a long history, founded in the mid-20th century or earlier. This indicates a mature industrial base in the area.

Pall Corporation specializes in filtration solutions, while KMC manufactures custom metal products. Global Industrial Company provides industrial products and solutions, and Drive DeVilbiss Healthcare offers innovative healthcare solutions. A notable pattern among these companies is their focus on specialized industrial and wholesale activities.

🇺🇸 Port Washington · 26 companies · Updated Nov 13, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Pall Corporation](https://www.tamtam.ai/c/pall-corporation) (pall.com)<br>Filtration, separation, and purification solutions for health, safety, environment, improving product quality, protecting assets, minimizing emissions, and advancing technology. | Manufacturing | 🇺🇸 Port Washington | 5,067 | 1946 |
| 2 | [KMC](https://www.tamtam.ai/c/kmc) (kmcstampings.com)<br>Established in 1908, this company specializes in manufacturing custom and standard metal products for global OEMs with a focus on quality and innovation | Manufacturing | 🇺🇸 Port Washington | 2,091 | 1908 |
| 3 | [Global Industrial Company](https://www.tamtam.ai/c/global-industrial-company) (globalindustrial.com)<br>Providing diverse industrial products and solutions including material handling, janitorial, and maintenance supplies to businesses and institutions. | Wholesale | 🇺🇸 Port Washington | 1,534 | 1949 |
| 4 | [Pall Life Sciences](https://www.tamtam.ai/c/pall-life-sciences) (pall.com)<br>A global leader in filtration and purification solutions, helping diverse customers improve processes, protect patients, enhance manufacturing, and deliver sustainable benefits | Biotechnology Research | 🇺🇸 Port Washington | 1,480 | 1946 |
| 5 | [Drive DeVilbiss Healthcare](https://www.tamtam.ai/c/drive-devilbiss-healthcare) (drivemedical.com)<br>Provides innovative healthcare solutions, including mobility, rehabilitation, pressure prevention, respiratory, and homecare products, distributed globally across continents and numerous countries. | Medical Equipment Manufacturing | 🇺🇸 Port Washington | 929 | 2000 |
| 6 | [Franklin Energy](https://www.tamtam.ai/c/franklin-energy) (franklinenergy.com)<br>Provides comprehensive sustainability solutions focusing on lowering energy costs, reducing carbon emissions, minimizing waste, and supporting community and economic growth. | Business Consulting and Services | 🇺🇸 Port Washington | 866 | 1994 |
| 7 | [Kiss Beauty Group](https://www.tamtam.ai/c/kiss-beauty-group) (kissbeautygroup.com)<br>A global beauty care leader creating accessible, trend-forward products sold in over 100 countries, with a culture of passion and growth | Personal Care Product Manufacturing | 🇺🇸 Port Washington | 818 | 1989 |
| 8 | [The NPD Group](https://www.tamtam.ai/c/the-npd-group) (circana.com)<br>Provides data, expertise, and analytics to help businesses measure, predict, and improve performance across multiple industries and sales channels worldwide. | Market Research | 🇺🇸 Port Washington | 629 | 1966 |
| 9 | [Kleen Test Products Corporation](https://www.tamtam.ai/c/kleen-test-products-corporation) (kleentest.com)<br>A trusted contract manufacturer and packager for Fortune 500 companies, ensuring high-quality, cost-effective production of consumer products for over 70 years | Manufacturing | 🇺🇸 Port Washington | 457 | 1944 |
| 10 | [Actylis](https://www.tamtam.ai/c/actylis) (actylis.com)<br>Specializes in managing critical ingredients and raw materials through manufacturing, sourcing hubs, and global distribution with extensive industry experience. | Chemical Raw Materials Manufacturing | 🇺🇸 Port Washington | 455 | 1947 |
| 11 | [Systemax](https://www.tamtam.ai/c/systemax-port-washington) (systemax.com)<br>A leading multichannel marketer of brand name and private label products, offering a unique shopping experience with efficient distribution channels across the US, Canada, and France | Business Supplies & Equipment | 🇺🇸 Port Washington | 374 | 1949 |
| 12 | [Pall - Energy+](https://www.tamtam.ai/c/pall-energy) (pall.com)<br>Global leader in filtration, separation, and purification solutions for various industries, ensuring purity, efficiency, and safety while maximizing production output and protecting critical assets | Machinery Manufacturing | 🇺🇸 Port Washington | 347 | 1946 |
| 13 | [Safavieh](https://www.tamtam.ai/c/safavieh) (safavieh.com)<br>Global wholesaler based in Port Washington, NY specializing in home decor and furnishings | Wholesale | 🇺🇸 Port Washington | 334 | 1914 |
| 14 | [Palm Bay International](https://www.tamtam.ai/c/palm-bay-international) (palmbay.com)<br>A leading US wine and spirits company with a comprehensive global fine wine portfolio, focused on brand building and exceptional experiences #drinkpalmbay | Beverage Manufacturing | 🇺🇸 Port Washington | 319 | 1977 |
| 15 | [Allen Edmonds](https://www.tamtam.ai/c/allen-edmonds) (allenedmonds.com)<br>Manufacturing and retailing premium men's footwear and accessories through a handcrafted 212-step production process in Wisconsin for upscale global stores and online customers. | Retail Apparel and Fashion | 🇺🇸 Port Washington | 246 | 1922 |
| 16 | [The Hawthorne Gardening Company](https://www.tamtam.ai/c/the-hawthorne-gardening-company) (hawthorne-gardening.com)<br>A leading distributor of hydroponic products, providing a range of brands for growers of all sizes with research, development, distribution, and service solutions | Consumer Goods | 🇺🇸 Port Washington | 223 |  |
| 17 | [Advantage Communications Group](https://www.tamtam.ai/c/advantage-communications-group) (advantagecg.com)<br>Optimize network infrastructure through global partnerships, technology expertise, and software, managing procurement, provisioning, inventory, and expenses across communications solutions. | Telecommunications | 🇺🇸 Port Washington | 174 | 2001 |
| 18 | [Port Washington-Saukville School District](https://www.tamtam.ai/c/port-washington-saukville-school-district) (pwssd.k12.wi.us)<br>A K-12 school district in Port Washington and Saukville, educating 2,700 students to reach their greatest potential in Wisconsin | Primary and Secondary Education | 🇺🇸 Port Washington | 167 | 1845 |
| 19 | [Helen Keller National Center for Deaf-Blind Youths and Adults](https://www.tamtam.ai/c/helen-keller-national-center-for-deaf-blind-youths-and-adults) (hknc.org)<br>National program offering vocational, rehabilitation services exclusively to deaf-blind youths and adults through residential training, community services, field offices, and professional training seminars | Non-profit Organizations | 🇺🇸 Port Washington | 158 | 1967 |
| 20 | [Tweezerman International, LLC](https://www.tamtam.ai/c/tweezerman-international-llc) (tweezerman.com)<br>A leading beauty tool expert bringing high quality, innovative products to the professional beauty industry for over 40 years | Manufacturing | 🇺🇸 Port Washington | 149 | 1980 |
| 21 | [CareConnect](https://www.tamtam.ai/c/careconnect) (careconnectmobile.com)<br>AI-powered caregiver workflow optimization platform for Agencies, offering tools for compliance, caregiver-client matching, scheduling, HR compliance, eLearning, recruiting, and secure communication | Home Health Care Services | 🇺🇸 Port Washington | 93 | 2017 |
| 22 | [Shake-N-Go Fashion, Inc.](https://www.tamtam.ai/c/shake-n-go-fashion-inc) (snghair.com)<br>Specializing in human and synthetic hair products, this company designs and manufactures hair extensions, wigs, and accessories, founded in 1991 | Wholesale | 🇺🇸 Port Washington | 65 | 1991 |
| 23 | [Dejana Industries Inc](https://www.tamtam.ai/c/dejana-industries-inc) (outworxgroup.com)<br>A machinery company located in Port Washington, NY, specializing in industrial equipment and machinery services | Machinery Manufacturing | 🇺🇸 Port Washington | 20 |  |
| 24 | [Manhasset Bay Yacht Club](https://www.tamtam.ai/c/manhasset-bay-yacht-club) (manhassetbayyc.org)<br>Exclusive waterfront club with a classic clubhouse offering social rooms, inn accommodations, sailing, pool, tennis, and dining for members and guests | Hospitality | 🇺🇸 Port Washington | 11 | 1891 |
| 25 | [Jadair International, Inc.](https://www.tamtam.ai/c/jadair-international-inc) (jadair.com)<br>A machinery company located in Port Washington, WI, specializing in the manufacturing and distribution of industrial equipment and machinery | Machinery Manufacturing | 🇺🇸 Port Washington | 7 | 1969 |
| 26 | [Omnizant Interactive](https://www.tamtam.ai/c/omnizant-interactive) (omnizantinteractive.com)<br>A digital agency specializing in providing exceptional websites and client service for healthcare providers through a client-centered approach to online marketing | Advertising Services | 🇺🇸 Port Washington | 1 |  |

## 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 13, 2026.

## The same list elsewhere in United States

- [The largest companies in the United States](https://www.tamtam.ai/l/largest-companies-united-states) (104,977)
- [The largest companies in California](https://www.tamtam.ai/l/largest-companies-california) (15,259)
- [The largest companies in New York State](https://www.tamtam.ai/l/largest-companies-new-york-state) (12,430)
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- [The largest companies in Illinois](https://www.tamtam.ai/l/largest-companies-illinois) (4,685)
- [The largest companies in Pennsylvania](https://www.tamtam.ai/l/largest-companies-pennsylvania) (3,427)
- [The largest companies in Massachusetts](https://www.tamtam.ai/l/largest-companies-massachusetts) (3,419)
- [The largest companies in Georgia](https://www.tamtam.ai/l/largest-companies-georgia) (2,965)
- [The largest companies in Ohio](https://www.tamtam.ai/l/largest-companies-ohio) (2,909)
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- [The largest companies in Virginia](https://www.tamtam.ai/l/largest-companies-virginia) (2,761)
- [The largest companies in Michigan](https://www.tamtam.ai/l/largest-companies-michigan) (2,600)
- [The largest companies in North Carolina](https://www.tamtam.ai/l/largest-companies-north-carolina) (2,409)
- [The largest companies in Alabama](https://www.tamtam.ai/l/largest-companies-alabama) (2,156)
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- [The largest companies in New York](https://www.tamtam.ai/l/largest-companies-new-york) (8,171)
- [The largest companies in San Francisco](https://www.tamtam.ai/l/largest-companies-san-francisco) (2,410)
- [The largest companies in Houston](https://www.tamtam.ai/l/largest-companies-houston) (1,987)
- [The largest companies in Chicago](https://www.tamtam.ai/l/largest-companies-chicago) (1,860)

## The same list elsewhere

- [The largest companies in the world](https://www.tamtam.ai/l/largest-companies-in-the-world) (415,089)
- [The largest companies in North America](https://www.tamtam.ai/l/largest-companies-in-north-america) (119,525)

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Source: https://www.tamtam.ai/l/largest-companies-port-washington