Tranche Update on Nabors Industries Ltd.'s Equity Buyback Plan announced on August 26, 2015.

Nabors Industries Ltd. owns and operates a land-based drilling rig fleet. The Company is a provider of offshore platform drilling rigs in the United States and international markets. The Company operates through five segments: U.S. Drilling, Canada Drilling, International Drilling, Drilling Solutions and Rig Technologies. Its services include tubular running services, wellbore placement solutions, directional drilling, measurement-while-drilling (MWD), logging-while-drilling (LWD) systems and services, equipment manufacturing, rig instrumentation and optimization software. Its United States fleet consists of approximately 171 alternating current (AC) rigs and 11 silicon-controlled rectifier (SCR) land rigs. Its international fleet consists of approximately 117 land-based drilling rigs located in approximately 14 countries. Through its Drilling Solutions, the Company offers specialized drilling technologies, such as patented steering systems and rig instrumentation software systems.