rwwine, I don't know the requirements concerning a company, their underwriters and the release of material information. I would assume the MNTA would be required to tell their underwriters of any material information that they knew about, as soon as they learned about it.
But any information that the underwriters knew about could have come from a number of sources. I doubt the underwriters are required to inform anyone about information they have.
When I read the rules in the past, they aren't precise, they use words like timely release of informtion.