Only 15.2% of ChatGPT topic categories had a clear brand owner across related buyer questions, according to a Semrush analysis. That means about 85% of categories had no dominant brand. Appearing in one prompt didn’t mean a brand appeared consistently across related questions in the same topic. How ownership was defined. Semrush defined a category owner as the brand with the highest share of mentions, appearing in at least four of five related prompts and leading the runner-up by at least 5 percentage points. Only 15.2% of the 1,094 categories met that standard. Another 31.2% had an emerging leader, with one brand appearing in at least three…
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