Notice of Results

TRANSGLOBE ENERGY CORPORATION ANNOUNCES RELEASE DATE OF

SECOND QUARTER 2018 RESULTS AND CONFERENCE CALL

AIM & TSX: "TGL" & NASDAQ: "TGA"

Calgary, Alberta, August 7, 2018 - TransGlobe Energy Corporation ("TransGlobe") will announce its second quarter 2018 financial and operating results on Tuesday August 14, 2018 before the opening of the stock markets. A conference call and webcast to discuss the results will be held the same day:

Time: 8:00 a.m. Mountain Time (10:00 a.m. Eastern Time, 3:00 p.m. London, UK)

Dial-in:

Canada/US: (416) 340-2218 or toll-free at 1-800-377-0758

United Kingdom: 00-80065789868

International Dial-in: https://www.confsolutions.ca/ILT?oss=1P1R8003770758 

Webcast: http://www.gowebcasting.com/9329

Shortly after the conclusion of the call, a replay will be available by dialing (905) 694-9451 or toll-free at1-800-408-3053. The pass code is 6171132#. The replay will expire at 23:59 p.m. (Eastern Time) on August 20, 2018. Thereafter, a copy of the call can be accessed through a link on TransGlobe's website at www.trans-globe.com.

TransGlobe Energy Corporation is a Calgary-based, growth-oriented oil and gas exploration and development company whose current activities are concentrated in the Arab Republic of Egypt and Canada. TransGlobe's common shares trade on the Toronto Stock Exchange and the AIM market of the London Stock Exchange under the symbol TGL and on the NASDAQ Exchange under the symbol TGA.