Berkshire Hathway Inc is USA based Conglomerate Company. Berkshire Hathway Business is into Diversified investments, Property & casualty Insurance, Utilities, Restaurants, Food processing, Aerospace, Toys, Media, Automotive, Sporting goods, Consumer products, Internet, Real estate.

3M is USA based Multi-National company and it manufactures Conusmer Goods, Healthcare Products, Products needed by Businesses, Products Needed by Consumers. 3M sells a variety of products in five major segments: Consumer, Healthcare, Industrial, Safety & Graphics and Electronics & Energy. Major brands include 3M Car Care, Scotchbrite, Post-It, Littmann, Nomad and Command. As on 2017, 3M has 91536 employees.

Conglomerate Business and Multi-Sector company with spread in Retail, Telecom, PetroChemicals, Energy, Textiles, Natural Resources with head quarters in Mumbai of India. Approximate Employee Count 188,000 as on 2017.

Multi-National Conglomerate Holding and Investment company with headquarters in Japan. Invests across various companies in various sectors across the world. Company operates in Telecom, Internet, Media and Marketing, Technology, Semiconductors, Financial, Investments and in many sectors. As of March 31, 2018 they had employee count of 74,952.

Siemens  is Germany based Multi-National Company  and it manufactures Technology Products. Engineering Products. Employee Count 377,000 as on Sep-30-2017. Siemens builds Software Solutions in the areas:

• Building Technologies
• Drive Technology
• Energy
• Healthcare
• Industrial Automation
• Mobility
• Financing
• Consumer Products
• Services
• Software

Real Estate company with headquarters in Hong Kong.

Mitsubishi Corporation is Japan based company with major business segments:

• Global Environmental & Infrastructure Business Group
• Industrial Finance, Logistics & Development Group
• Energy Business Group
• Metals Group
• Machinery Group
• Chemicals Group
• Living Essentials Group

They have around 60,000 employees as on 2018.

Investment company and financial service sector company with headquarters in Hong Kong. Company is State-Owned company.

Conglomerate Sector company with businesses in Retail, Infrastructure, Telecom, Energy and couple of other sectors. Headquarters in Hong Kong.

Conglomerate Company with businesses in Information & Telecommunication Systems, Social Infrastructure, Electronic Equipment, Construction Machinery, Automotive Systems etc.. with headquarters in Tokyo, Japan.