- Most likely open it with Excel/Google Sheets/Open Office/Numbers? (More likely if an individual or small business).
- Upload it into some kind of database/Big Query/AWS (More likely if a company/data scientist working with journalists).
When you upload it and scroll down it looks like there is no data after row 190 which is weird and makes you thing something is very wrong. That turns out to be because 192 - 484 are indeed blank: