It's one of those things that's technically true based on using statistics selectively. If you count all their investments, given that the top 1% control 43% of all wealth, they produce a large percentage of global emissions (but at 16%, not as large as their share of the wealth would suggest).

But it's irrelevant to climate change because there's nothing that you can do to them that would substantially decrease those emissions. It's not like they're causing a huge amount of pollution from their private jets and golf courses. If you redistribute their shares to someone poorer then the same amount of pollution will be produced, because a factory that produces five million tons of CO₂ does so regardless of the makeup of the owners.