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

JD.com, Inc. is an online direct sales company in China.

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 (JnJ) researches, develops, manufactures and sells a wide range of products in the field of health care.