An omz file extension is related to the market apps and used for their data files.
OMZ file extension - Market data
What is omz file? How to open omz files?
File type specification:
The omz file extension is associated with the market applications.
The omz file contains stocks, future, indexes data.
Seems to be very rare used or obsolete file format without support from developer.
This omz file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.