Key SC 13G ENERPLUS / KEY GROUP HOLDINGS ownership change

EXHIBIT 99.1

Joint Filing Agreement

In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with all other Reporting Persons (as such term is defined in the Schedule 13G referred to below) on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Common Stock, without par value, of Enerplus Corporation, and that this Agreement may be included as an Exhibit to such joint filing.  This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

Dated:  February 10, 2022

KEY GROUP HOLDINGS (CAYMAN) LTD.

By:    /s/ Yvonne Daffy

Name: Yvonne Daffy

Title: COO/CFO

/s/ Sunil Jagwani

Sunil Jagwani

MILLINVEST, LTD.

By:    /s/ Sunil Jagwani

Name: Sunil Jagwani

Title: Director