Bloomberg publishes a weekly newsletter called BW Insider. Since the founding of Bloomberg in 1981 by Michael Bloomberg, Thomas Secunda, Duncan MacMillan, and Charles Zegar the company has grown to control one third of the financial information gathering market.

Business Week is now owned by Bloomberg. It was first published in September 1929.

Business Week has always expressed strong opinions and so does its newsletter. Business Week's circulation is over 4,800,000 in 140 different countries. BW Insider has a special emphasis on news from the United States, Poland and Lebanon.