List of Reporting Style Codes

The following is a listing of reporting style codes for public companies.

#

CIK

Entity Registrant Name

Reporting Frame Code

1 0000353020 Aegion Corp COMID-BSN-CF1-ISM-IEMIB-OILY-SPEC8
2 0000875582 Northern Technologies International Corporation COMID-BSN-CF1-ISM-IEMIB-OILY-SPEC8