What is the best method to copy all matching text from a web page?

Background I have a live web dashboard for ticket numbers and their status updates. Each update and case number are in separate rows on this web page. To make this dashboard useful, I have to save it as offline HTML and import it into excel to copy one row of data like all case numbers.

Goal How do I search for a matching string on a page and copy all to clipboard in separate lines? EG, all my case numbers match the first two digits like “12.......” If I can manage to figure that out, I can make use of text in tools easier like Trello etc.