Noah's was owned by a Jewish family. It was bought in 1995 by Einstein Bros Bagels and is now part of the over 500 bagel stores nationwide owned by the Einstein/Noah Bagel Corp. (which is in turn 50% owned by the Boston Chicken Corp., owners of the Boston Market restaurant chain).
While much of what was good about Noah's still survives, corporatization has taken it's toll on some of Noah's traditions, such as having all stores certified Kosher (some still are, but many aren't) and shutting the entire chain down for Passover (since you can't make an unleavened bagel).