Nostrum Oil & Gas Plc ABOUT OPERATIONS SUSTAINABILITY INVESTORS CAREERS MEDIA CONTACT 2020 Overview Financial KPIs Non–financial KPIs Nostrum has successfully built infrastructure and produced over 100m boe from the Chinarevskoye field. The Group employs tight financial discipline to maintain liquidity and safeguard our core business. CASH AT THE YEAR END (US$m) US$78.6m OPERATING COSTS PER BOE (US$ PER BOE) US$/boe3.91 G&A COSTS PER BOE (US$ PER BOE) US$/boe1.72 SELLING AND TRANSPORTATION COSTS PER BOE (US$ PER BOE) US$/boe3.57 Operating costs per boe are calculated as cost of sales minus DD&A plus/minus inventory adjustment, divided by production volumes. G&A costs per boe are calculated as general and administrative costs minus DD&A, divided by production volumes. Selling and transportation costs per boe are calculated as selling and transportation costs minus DD&A, divided by sales volumes. 2020 Overview Investment Case Summary Financials Regulatory News & Alerts Share Price Reports & Presentations Documents & Circulars Financial Calendar Analyst Coverage Bonds & Credit Ratings Total Voting Rights An Introduction to Nostrum Oil & Gas Nostrum Highlights Financial Calendar 9th Floor 20 Eastbourne Terrace London W2 6LG United Kingdom +44 20 3740 7430 Modern Slavery and Transparency Statement Privacy & Cookies Policy Disclaimer © 2021 Nostrum Oil & Gas Plc Website by BRIGHTER*IR follow us on linked in

Nostrum Oil & Gas Plc ABOUT OPERATIONS SUSTAINABILITY INVESTORS CAREERS MEDIA CONTACT Regulatory News & Alerts Regulatory News Email Alerts 2020 Overview Investment Case Summary Financials Regulatory News & Alerts Share Price Reports & Presentations Documents & Circulars Financial Calendar Analyst Coverage Bonds & Credit Ratings Total Voting Rights An Introduction to Nostrum Oil & Gas Nostrum Highlights Financial Calendar 9th Floor 20 Eastbourne Terrace London W2 6LG United Kingdom +44 20 3740 7430 Modern Slavery and Transparency Statement Privacy & Cookies Policy Disclaimer © 2021 Nostrum Oil & Gas Plc Website by BRIGHTER*IR follow us on linked in