This week, the executive leadership team of Sephora has descended on New York for its first global brand summit, where chief executive officer Guillaume Motte will share his strategic vision with about 200 brands. “We think it’s important to share our optimism with our brand partners,” Motte said during an exclusive interview prior to the global gathering on Thursday. While Latin America, the United Kingdom and Middle East have all had positive market share gains, challenges in other key markets are proving thornier. China continues to be a pain point, while in Australia, Mecca continues to have a commanding market share. “We still have a lot of room to improve in terms of market share,” he said.