Which tech giant underwent a complete rebranding in 2015, changing its corporate structure and introducing a new minimalist, multicolored logo to replace its serif-font predecessor?

In the fast-paced world of technology and innovation, company logos often evolve to reflect changing times, market positions, and corporate visions. Some of the most significant tech companies have undergone remarkable logo transformations that coincided with pivotal moments in their development. This trivia explores a fascinating moment when a major tech company's visual identity shift marked a turning point in its business strategy and market perception.

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Google (becoming a subsidiary of Alphabet Inc.)
Microsoft (following Satya Nadella becoming CEO)
Apple (after reaching $1 trillion market valuation)
IBM (during its cognitive computing transformation)