Exited company after 15 years. Part of 401K was invested in company stock fund. At exit, i received 1700 equivalent shares from the stock fund to leverage NUA.

If I sell these shares next month, will I be subject to LTCG taxes or STCG taxes in FY17? I've read that to qualify for LTCG taxes you have to have the investment asset for 1 year. I've had the stock fund for 15 years, so are the equivalent shares considered owned by me for more than a year or is the date of ownership of the stock the date the fund was converted to equivalent shares?

Appreciate clarification.