"The only way to sell them per SEC regulations is that both parties must be certified institutional investors (buyer and seller). "
Dan, I have to call the company out of this one and say that they are flat out WRONG!
I am sure that + 90% of the warrants out there are currently in an E*Trade, TD Ameritrade or other institution, which, in its capacity, can act as BOTH a broker and a dealer.
Warrants are a derivative that are traded in a similar way to options, in which the price is based on an underlying security (This being the current US Concrete stock). There is indeed a market out there for warrants, no matter how large or small the demand is. A company cannot dictate whether or not a warrant can be traded. The current holders of there warrants are recorded by the custodian, and anytime the warrants do trade hands, the custodian's responsibility is to keep track of the owners.
Bottom line, the company cannot control or dictate how options for the company are traded on the open market. What right do they have to dictate how or when the warrants are traded?
This is a potential lawsuit that the company has on its hands if they do not let these things trade for some strange reason. Mark my words.