Denver-based Synergy will initially offer 14 million shares of common stock, with another 2.1 million shares set aside for underwriters should they choose to exercise their 30-day purchase options.
Book-runners include Credit Suisse, BofA Merrill Lynch and Citigroup.
The offering is expected to close on 27 January 2016.
Synergy - a darling among energy-stock analysts due to its solid position in a top-tier unconventional play and efficient operating abilities - said it intends to use the net proceeds for general corporate purposes.
