UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date: December 6, 2018 1:00 P.M.
Form: S-3
CIK: 0001084991
Company Name: NATURAL GAS SERVICES GROUP INC
File Number: 333-228350
CIK: 0001758627
Company Name: NGSG Properties, Inc.
File Number: 333-228350-01