Also, while it’s suspicious circumstances, we don’t know Apple stole the tech. The lawsuits are still ongoing (after mis-trialing) but Apple lost the appeal to sell the products during the trial. To make it even messier, courts (with a jury) have found that Masimo copied Apple about some design aspects. This is probably one of the messiest corporate litigations in a long time - Apple isn't known for making deals.

Note that the verdict is under appeal.