Armalite. They designed the darn thing*.
*Yes, I know the current Armalite has only passing connection to the original Armalite, but the current Armalite is STILL the most innovative M/AR-15 manufacturer in terms of advancing the design. And the Armalite NM is a SWEET shooter.
if by passing you mean in name only.
How about KAC? Didn't Eugene Stoner work for them later in life?