Stericycle has always been in the medical waste handling/mitigation/disposal business, and they still are. I just read today where Waste Management wants to buy them.
Back in the day, Stericycle decided they wanted to expand their footprint. In/around 2010 they bought the product retrieval part of RQA, and in 2011 they bought Corporate Research International (CoRI), a MS provider. Many of you might remember how CoRI would start shop fees for pennies and then according to some algorithm would systematically raise shop fees, seemingly daily. It was always a gamble on whether to take a shop for today's fee or wait until tomorrow to see if the fee would rise.
Stericycle did not provide mystery shopping services for very long. I do not know whether they sold off the MS division or simply closed up shop on the MS division.
Stericycle did acquire the product retrieval part of RQA in/around 2010. However, they ended up in court over the purchase price. From what I read it seems that the purchase price was contingent on Stericycle being able to hit certain revenue numbers with what they purchased from RQA, and they didn't reach those numbers. When Stericycle attempted to recoup some of the original purchase price from RQA they ended up in court.
At that time RQA restarted their product retrieval business. I guess that RQA figured that the sales and non-compete agreements were voided due to the lawsuit. The result was that now 2 companies were offering the same product recall and retrieval services, and there still are 2.
Both Stericycle and RQA used the same website management platform for their fieldworkers, which was another part of the court proceedings since RQA had sold the website management platform to Stericycle. Eventually RQA switched a different platform, while Sedgwick still uses the same Servicemanager platform that RQA started using 25 years and 3 companies ago.
In 2020 Sedgwick bought the recall/retrieval part of Stericycle and still operates it along with the medical waste division.