The Business Week
Following the sale of the magazine by McGraw-Hill to Bloomberg, the magazine received a very minor change to the logo, with the Bloomberg logo inserted in to the previous look. This was used for a very brief time-span of 5 months.
The magazine received an extensive and drastic redesign in April 2010, thanks to designer Richard Turley, which introduced a new custom variant of Helvetica called Neue Haas Grotesk (also used in the logos of Verizon and Pinterest) and changed the magazine's approach in design to something more unique and, often, humorous.
The magazine received another redesign in June 2017, which simplifies the previous design and made it much more formal in tone. The actual logo stays the same, however it appears much more smaller on the magazine covers now.