supposed rights..https://ca.finance.yahoo.com/news/maxar-technologies-adopts-tax-benefit-110000089.html paragraph 4 etc.
As part of the plan, the Maxar Board of Directors declared a dividend of one preferred stock purchase right, which are referred to as “rights,” for each outstanding share of Maxar common stock. The dividend will be payable to holders of record as of the close of business on May 28, 2019. Any shares of Maxar common stock issued after the record date will be issued together with the rights. The rights will be exercisable if a person or group, without the approval of the Maxar Board, acquires, or obtains the right to acquire, beneficial ownership of 4.9 percent or more of Maxar common stock. The rights also will be exercisable if a person or group that already beneficially owns 4.9 percent or more of the Maxar common stock, without Board approval, acquires additional shares (other than as a result of a dividend or a stock split). Existing Maxar stockholders that, as of May 13, 2019 beneficially own in excess of 4.9 percent of the common stock will be “grandfathered in” at their current ownership level. If the rights become exercisable, all holders of rights, other than the person or group triggering the rights, will be entitled to purchase Maxar common stock at a 50 percent discount. Rights held by the person or group triggering the rights will become void and will not be exercisable.