Hi Zeke, I have owned and operated a fair number of businesses in my 65 year old life and the manufacturing sector has been quite a lot of it.
But having said that, IMO many corporations that make products are not listed on the big or small boards. They might be private or family owned, but successful.
A Pink company that is involved in the creation of a new and maybe very valuable product has it's shareholders as it's family.
It's future can ride not only on it's invention, but on it's success in raising the necessary money to bring it's creation to market. It should wear two hats at the same time, again IMO, or it will be forced to sell it's lifes bloods work at a cheap price.
As in, "we did all the hard work, now were broke". Peole will buy shares in a company that transparent, without giving away it's secrets. IMO.