Walmart (WMT) is a giant in the retail space. It is the second-largest retailer on the planet, behind Amazon (AMZN). As a seller of many vastly different products, Walmart has an extensive supply chain that consists of 2,800 suppliers worldwide. Being a supplier for Walmart is a profitable and unique relationship.

As Walmart continues to grow its operations, which as of January 2020 consisted of 11,501 stores in 27 countries and 2.2 million employees around the world, its suppliers grow as well. Walmart took in more than $510 billion in revenues in 2019, an increase of 2.3% from $496 billion in 2018.

The vast majority of its suppliers are in the United States. However, the supply chain for Walmart stores is global, with suppliers in the United Kingdom, Canada, China, Mexico, Taiwan, Hong Kong, France, and other countries. Of the top five suppliers who generate large portions of their revenues from Walmart, four are U.S. companies and one is based in Japan.

Plug Power Inc.

Plug Power (PLUG) is a leading developer of hydrogen fuel cell technology. Working with companies seeking to reduce emissions, power usage, and operational costs, Plug Power offers solution packages for creating hydrogen and fueling infrastructure relying on fuel cell technology. Plug Power derives the majority of its business from Walmart and Amazon. The companies use Plug Power's energy cells in their machinery, such as forklifts in their warehouses.

Walmart was the first large company to work with Plug Power to refine its technology and install it on a mass scale. In 2017, Walmart and PLUG penned a deal allowing Plug Power to acquire financing through Walmart in order to expand its network in a way that results in all power deals between the two to be cash flow positive from inception. Plug Power generated revenues of $230 million in 2019, and as of April 2020, it had a market capitalization of $1.1 billion.

Funai Electric Co.

Funai Electric (FUAIY) is a Japanese consumer electronics company based in Osaka, Japan, with a U.S.-based subsidiary in Torrance, California. Funai Electric primarily produces audiovisual equipment, including LCD TVs, DVD players, and related products. In 2019, Walmart accounted for 50.8% of Funai's overseas sales.

The company markets its products under other licensed brand names, such as Sylvania, Emerson Radio, Magnavox, and Phillips. Funai Electric is one of the largest suppliers of electronics to Walmart. In 2019, Funai Electric generated $950 million in revenues, and as of April 2020, its market capitalization was $141 million.

CCA Industries Inc.

CCA Industries (CAWW) generated around 41.5% of its revenue from Walmart in 2018, its largest client. CCA is a distributor of health and beauty products that include toothpaste, nail treatments, hair products, and dietary products that are found in over 40,000 stores. CCA mostly sells its products through major drug and food chains, warehouse clubs, and wholesale distributors. Walmart stores have been retailers for CCA products for over 20 years. CCA generated revenues of $16.6 million in 2018, and its market capitalization was $15 million as of April 2020.

Green Dot Corporation

Green Dot Corporation (GDOT) is one of the originators of the prepaid debit card designed to serve unbanked and underbanked consumers. In addition to being the largest provider of reloadable prepaid debit cards by market cap, Green Dot is the largest processor of tax refund disbursements in the U.S.

Green Dot has partnered with Walmart since 2007 to offer the MoneyCard program to Walmart customers. In 2014, they launched the GoBank checking account. In 2019, both companies announced that they will partner on launching an accelerator, called Tailfin Labs. The company will assist startups that focus on the retail and tech sector. Green Dot generated $1.1 billion in total revenue in 2019, and its market capitalization was $1.2 billion in April 2020.

Primo Water Corporation

North Carolina based Primo Water Corporation (PRMW) is one of the largest providers of refillable, self-service water dispensers, which are used at more than 25,000 retail locations. They supply Lowe's Home Improvement, The Home Depot, Meijer, Kroger, Office Depot, and others. The company generated $2.4 billion in revenue in 2019, and its market capitalization was $1.4 billion as of April 2020.