The information previously provided in response to Item 4 is hereby amended and supplemented with the following:
On December 4,2019, First Reserve XII and FR XIIA sold an additional 603,241 shares of Common Stock pursuant to the Underwriting Agreement dated November 21,2019 with the Company and Pareto Securities AS in connection with the exercise in full on December 3,2019 of Pareto’s option to purchase additional shares. The shares of Common Stock were offered and sold pursuant to the Issuer’s registration statement on Form S3 (Registration No. 333233939).
The responses set forth in Items 5 and 6 are incorporated by reference into this Item 4 in their entirety.