Thanks for the replies.SherlockHow do I create a ESPP security? The only way I know of is to actually make a ESPP purchase of a security. I don't work for them any more and there hasn't been an ESPP purchase of the new company.. A corporate acquisition of the regular shares aren't a problem, but ESPP shares are not in the list to chose from to be converted.mshigginsThere are no tax consequences, just .45 shares of the new for every one of the old, the total cost basis doesn't change, just the cost basis per share. There are 11 open lots of ESPP shares and two of regular shares. The old is Engility and new is SAIC. I can do a conversion manually (I already have) and go into each ESPP purchase and change it to what a SAIC purchase would have been, but as I said I would like to have a record of the original purchases..