They’re a relatively young brand but a fully integrated manufacturer.
https://www.bobswatches.com/rolex-blog/resources/history-parmigiani-fleurier.html
The Origins Of Parmigiani Fleurier
In the mid-1970s, smack in the middle of the Quartz Crisis, a young watchmaker named Michel Parmigiani opened a workshop to restore antique and vintage timepieces. His reputation quickly gained him an illustrious list of clients including Patek Philippe (who entrusted Michel Parmigiani to restore important pieces for its museum), Breguet, Vacheron Constantin, and others.
Another one of Michel Parmigiani’s customers included the Sandoz Family Foundation (of Novartis Pharmaceuticals fame), founded by sculptor Edouard-Marcel Sandoz as an institution to promote Swiss entrepreneurship. The watch restorer was tasked to maintain the foundation’s large collection of clocks and automata.
This encounter proved to be significant, as it was due to the Sandoz Family Foundation’s encouragement and investment dollars that paved the way for the birth of the Parmigiani Fleurier brand in 1996. Fleurier is a small town in Switzerland where the brand is headquartered.