What was the source of the shares in question? If it was a family gift or something like that then no, you would not be entitled to any portion of it. Gifts are separate property.
If it had to do with compensation from his employment, then see Tranq's response.
I had Hug as a brief in law school (Community Property assigned cases.) and created a spreadsheet and a MS Publication on the process. The professor uses both as a resource to classes he now teaches. (Lousy law school, no doubt. Worst tier of acceptance.Just saying.)
EVEN WITH THE MATH ONE CAN CALCULATE between the interaction between the cases and life, the real answer is what is fair. I only add this because LdiJ's response has me remember things. For a moment, a very long time ago, I figured myself a top expert in the particular question. Times change, I have not specifically followed case law and, do not have many real facts to make a claim. Certainly, without any doubt, if the shares were a gift where the OP/spouse did no work in a capital-type situation, the husband has nothing that devolves to the OP. To me, it seems the "shares" (whatever that means) are a result of work by the husband. If so, read the cases.
They are hard. But, if you read them again and again, you get it. It's kinda fair. It is the way it should be. However, other cases decide differently based on facts that seem indistinguishable. The real issue is to argue what SHOULD be done. You can tilt it towards the law if you want. What should be done is the real answer.
So, it depends.