Vlookup? Pivot Table? How do I match column A and B to contents in column C?

Its more complicated than the title leads on...


Column A has the Name of the Company, Column B has the Company's unique record number. These two columns must stay alligned. Because Column C through I, have tasks performed by these companies but only a record number to identify them and they are not in any particular ascending order. Also there are thousands more tasks then there are companies. Some of the tasks are from companies not listed in column A&B and if that is the case I need to get rid of whatever tasks does not match up with columns A&B. Then there will be multiple tasks per company.

example of problem.xlsx

But first, I need to match column A and B to column C without moving C through I or if I do I need to make sure the rows from C through I stay together.

My spreadsheet has lines in the 200k's, its huge. What is the best way to go about finding a solution. If you have one can you please list it! I'm desperate and in a hurry!

Angela B.

ps I've attached a sample