I always thought it was very strange that SIG bought Kavan and Graupner and then went out of business themselves. That is typically a sign of cash flow shortages and heavy debt.
As a local example, we had a grocery chain called Hagan's. They decided to buy Safeway...maybe Albertson's also...not sure about Albertson's. Anyway, it appears that Hagan's did buy Safeway but then went Tango Utah. I looked up Hagan's and found out they only had THREE stores. The Hagan's chain is gone now, but Safeway survived. Why the HELL would a 3 store chain decide they could buy out a mega store chain? Seems stupid to me!
Another local example, we had a local pharmacy chain called Bartell's. Some years ago, Rite Aid opened a bunch of stores, and then purchased Bartell's, followed by Rite Aid going bankrupt and closing down all their stores. Hmmm. Bartell's is still in existence, with fewer stores and the ones still open have a lot of empty shelves....indicating lack of cash/credit for inventory. Pretty sad; Bartell's are our favorite pharmacies.
I THINK that all three cases (including SIG, Kavan & Graupner) were cases of big loans and lack of cash flow. I wonder if maybe the banks involved...or lawyers...who were orchestrating the failures for some nefarious reasons or just not caring about their customers solvency and long term wellbeing. I guess if the bank makes out ok, they're happy. They often sell off debt to other lending institutions, so I could see that happening in these cases.

Steve