Wow, a lot of drivel has been spewed in this thread already! I'll start by verifying some assertions about Cold Steel and SOG.
U.S. Navy SEALs (along with many other U.S. special operations and other frontline soldiers, as well as some allied troops) are
issued and privately purchase Cold Steel knives, as evidenced in my thread here:
https://www.bladeforums.com/threads/cold-steel-knives-in-combat.1365808/
U.S. Navy SEALs (along with many other U.S. special operations and other frontline soldiers, as well as some allied troops) are
issued and privately purchase SOG knives, as evidenced in my thread here:
https://www.bladeforums.com/threads/soldiers-and-their-sog-knives.1616050/
Pinemoon, I find this topic very interesting, as well. The problem is, your questions get asked fairly frequently, with the same smattering of answers, half-answers, anecdotal answers, and non-answers. The people with a lot of knowledge on the topic have stopped bothering to respond. Plus, entire books have been written about the subject, with a lot more facts, details, and verifications than you're going to find here.
From my own studies, I can tell you that just about every major U.S. knife manufacturer has had a military procurement contract for some of its knives at one point or another, including:
Cold Steel
SOG Knives
Benchmade
Mission
Spyderco
Emerson Knives
Gerber
Buck
Case
Camillus
Ontario
Ka-Bar
Colonial
Strider
Hogue
CRKT
United (Smith & Wesson)
There have also been plenty of unit procurements made with these companies. Individual unit procurements also occur with lots of smaller suppliers. A few examples include:
Winkler Knives
Mad Dog Knives
Ox Forge
Ernest Emerson (customs)
Chris Reeve
Microtech
As for law enforcement, the answers are almost as varied, though contracts are almost never used. Small-batch procurements with most of the major companies tend to dominate. And it's often specialty and tactical teams doing the buying.
-Steve