Ownership group is ‘CRU’ for 4 files.
https://www.uspto.gov/sites/default/files/documents/inter_parte_historical_stats_roll_up.pdf
https://www.uspto.gov/sites/default/files/documents/Streamlined-Reexam-Filings.pdf
https://www.uspto.gov/sites/default/files/documents/term_reexam_proceed.pdf
https://www.uspto.gov/sites/default/files/patents/Best_Practices_and_FAQs_for_filing_reexaminations_5_10_10.pdf