Hi. I posted something similar yesterday, but I have learned a little more about my data set and am trying again. I have attached an example of the data. I need to create a new field (column D) that will include the Security (column C) for that row plus anything above in the hierarchy. So for Level 3 Review Industry Example Application, I need the new column to list Review Industry Example Application, Review Trail Reporting Guide (Level 2), and Review Trail Guide (Level 1). I started building this with a multi-row formula tool but there are so many combinations (source file is over 1 million rows) that I think I may need help building an iterative macro.