This recent article from Silvergrain Classics on the 'State of the photochemical industry in 2023' has some interesting detail on the complexities surrounding Tetenal 1847 and ORWO.
silvergrainclassics.com
The rest of the article holds no surprises, although Fuji is notable for its absence, even as a supplier of C-41 and RA4 process chemistry and paper

The State of the Photochemical Industry in 2023
The State of the Photochemical Industry in 2023: Which Companies to Support, and Why

The rest of the article holds no surprises, although Fuji is notable for its absence, even as a supplier of C-41 and RA4 process chemistry and paper