SHAREHOLDER INVESTIGATION: Halper Sadeh LLC Investigates OKE, MMP, NEM

NEW YORK, May 15, 2023 /PRNewswire/ — Halper Sadeh LLC, an investor rights law firm, is investigating the following companies for potential violations of the federal securities laws and/or breaches of fiduciary duties to shareholders relating to: ONEOK, Inc. (NYSE: OKE)’s merger with…