The consortium that has made on offer to buy all outstanding shares in Atlas Corp, the parent company of container ship leasing giant Seaspan Corp, said in an update of Friday that it believed it has made “meaningful progress” in its discussions with the special committee of independent investors that Atlas has formed to evaluate its takeover bid.

The update issued by Poseidon Acquisition Corp, which is acting on behalf of the consortium, indicated that the offer price of $15.5