The Mckinsey Quarterly is the business journal of McKinsey & Company.
If you are interested in management, business strategy and corporate strategy, (and finance, marketing, operations, etc.) the The Mckinsey Quarterly website is the right place for you.

Most of the articles are available for free and with the free registration you can receive news on various topics by email.
The premium subscription allows you to receive the magazine plus it gives you full access to all articles in the website.

A great source of insights!