The logo of German chemicals maker Covestro is pictured outside its headquarters in Leverkusen, Germany, July 26, 2019. REUTERS/Wolfgang Rattay/File Photo Acquire Licensing RightsFRANKFURT, Aug 24 (Reuters) - Germany's Covestro (1COV.DE) should engage in formal takeover talks with Abu Dhabi National Oil Co (ADNOC) in the interest of its shareholders, two top-15 investors of the plastics and chemicals maker told Reuters. ADNOC, which is trying to diversify and develop its downstream and renewable energy operations, made a non-binding offer for Covestro of 55 euros per share in June, which was rejected, according to press reports. Rautenberg declined to comment on the price at which he would recommend Covestro accept an offer. Covestro this week appointed Christian Baier as chief financial officer, with Rautenberg noting his past dealmaking experience at private equity firm Permira.

---

Persons: Wolfgang Rattay, ADNOC, Arne Rautenberg, Covestro, Rautenberg, Christian Baier, Emma, Victoria Farr, Elisa Martinuzzi, Kirsten Donovan Organizations: REUTERS, Rights, Abu, Abu Dhabi National Oil Co, Reuters, Union Investment, Thomson Locations: Leverkusen, Germany, Abu Dhabi