I am late to this … but, I have the same issue with the spin-off shares reported from Equity Trust. I also have some shares that are held under Morgan Stanley. On those, they provided the acquired date for the Honeywell Shares so that they were reported as long term. They also had a cost basis for me. Based on that, and the fact that the ET shares were held much longer, I went with a cost basis of 0 and used long term.