If your corporation consists of business units, than your corporate presentation is likely to end up as a series of chapters, each talking about a different business unit. If the corporate centre is organised, then each chapter might have the same repetitive template/structure. Each business unit gets airtime based on how important it is (usually in terms of sales). The order of the chapters is probably in line with the seniority of the business unit leader. It all makes sense in the political structure of the company.
Your real story might be different though. A small business unit might have all the growth potential that your investors are curious about. A more junior manager might be a captivating speaker. The same presentation template might not fit the specific story of each business unit. Seeing exactly the same template 10 times is boring. And how do all the business unit stories link together to a bigger picture?
Sometimes it is better going top down than bottom up.