Regarding who makes what etc. It's really rather complicated and the more you know, they more you might get concerened???
Hodgdon does not make nor has ever made smokeless powder. They make Pyrodex, Triple 7 & White Hot. As previously gentleman have mentioned what they are is a distributor for many different branded powders. Now for the rest of the story.
General Dynamics purchased Olin/Winchester etc and produces the following spherical/ball & single base powders: In Quebec, Canada IMR 3031, 4007ssc, 4064, 4198, 4227, 4320, 4350, SR4756, SR4759, 4831, 4895, SR7625, 7828, PB & 7828ssc, and in St. Marks, Florida Hodgdons HP38, 110, 414, 380, Lil'gun, Hybrid100v, HS-6, H335, BL-c(2), titewad, titegroup, longshot, leverevolution, cfe223, us869, superperformance and also Winchester 231, 296, supertarget, superfield, aalite, superhandicap, 760, 748, supreme 780, auto comp.
The Thales Group (french company) purchased Australian defense industries in 2006. They produce in australia Hodgdons Extruded line H4895, 4198, Varget, 4350, 50bmg, 4831/4831sc, 1000, retumbo, 322, benchmark, trail boss, 8208xbr, also H4227 (AR2215)(not distributing H4227 in US anymore).
Group SNPE (french owned again...) formed a subsidary called EURENCO in 2004 they own most of the european powder produced in belgium, finland, france & sweden. This includes Vihatavauri, ramshot and most of the norma line & alliant reloader line (except RL-17 switzerland/german?).
The old alliant powders like red, blue, green dot, unique, bullseye, 2400 are still produced in the usa.
Chew on this for awhile...