How it works in a data room
Rows list the folders of the index and columns list the user groups, or the other way round. Each cell holds an access level: hidden, view, print, download, edit. Many platforms present permissions this way natively and let administrators change several cells at once, copy a column from one bidder to another, or export the matrix to a spreadsheet for sign-off. Advisers often draft the matrix before the room opens and attach it to the process plan.
Why it matters in a deal
Rights scattered across folder settings are hard to review. A single grid makes mistakes visible: a bidder column that differs from the others, a sensitive folder open to everyone, a lender who can download HR files. Sellers and their counsel can approve the matrix as a document, and the data room administrator can compare it against the live room before each phase. It turns granular permissions into something a partner can read in two minutes.
Example
Before opening the second round of a sale of a Belgian logistics firm, the adviser exports the permission matrix and sends it to the seller’s general counsel. She notices that one bidder, a direct competitor, still has view access to the pricing folder intended only for financial sponsors. The cell is changed before the round opens, and the signed matrix goes into the deal file. The private equity guide discusses why sponsors and trade buyers are often treated differently.