Investor Presentaiton

Highlights Transaction overview and key terms Proposed merger of Premier and Chrysaor ■ Premier to acquire Chrysaor through a reverse takeover ■ Premier's London listing retained - Completion anticipated during Q1 2021 - Creditor support received. Shareholder approval required Key terms ■ Premier's stakeholders will own up to 23% and Harbour plus other Chrysaor shareholders at least 77% ■ Premier's c.$2.7bn of gross debt and other liabilities repaid and cancelled: ■ - - - Creditors will receive $1.23bn in cash Refinancing of LCs of c.$400m Equity in Combined Group with a partial cash alternative Assuming full take up of the cash alternative, Premier's shareholders will have c.5.5% in Combined Group Governance ■ Board to consist of 11 directors - 3 Executive Directors: Linda Cook (CEO), Phil Kirk (President, CEO Europe), and CFO 2 Harbour Energy appointees 6 Independent Directors Pro forma ownership structure Other Chrysaor s/holders 44.9% PMO s/holders 5.5% PremierOil Existing PMO Creditors 10.6% Note: Assumes full take up by creditors of the partial cash alternative. Free float to be greater than 40%(2) Ownership Existing Premier Shareholders Existing Premier Creditors Harbour Energy Other Chrysaor Shareholders(1) Harbour Energy 39.0% Lock-up None Small holders (< 2.7%): none; Large holders: 3-6 months 12 months 6 months 1. Other pre-completion Chrysaor shareholders consist of global investors, sovereign wealth funds, pension funds and other asset managers 2. Shares held by investors located inside and outside the EEA November 2020 P4

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