JB Hi-Fi Limited is a music and electronic goods retailer in Australia.

Japara Healthcare Limited, is a provider of aged care and retirement living services in Australia.

Janus Henderson Group plc operates as an investment management company.

James Hardie Industries plc manufactures building products for new home construction and remodeling.

Jumbo Interactive Limited develops e-commerce and online retailing technologies.

Jupiter Mines Limited operates as a mining company.

Johnson & Johnson (J&J) is an American multinational corporation founded in 1886 that develops medical devices, pharmaceuticals, and consumer packaged goods. Its common stock is a component of the Dow Jones Industrial Average and the company is ranked No. 36 on the 2021 Fortune 500 list of the largest United States corporations by total revenue. Johnson & Johnson is one of the world's most valuable companies and is one of only two U.S.-based companies that have a prime credit rating of AAA.