Investor Active Ownership,which holds about 7 percent in Stada shares andoptions, invited fellow shareholders to help to find newnon-executive board members to oversee the German maker ofgeneric drugs and consumer care products, in a further challengeto how the company is run.

Active Ownership earlier this year launched a campaign toimprove the way Stada is governed and proposed candidates forsupervisory board seats at Stada's annual meeting.

Stada at the time responded by postponing the meeting fromJune 9 to Aug. 26 to have more time to look for differentcandidates which the company wanted to propose to shareholders.

Active Ownership on Friday asked shareholders owning atleast 75,000 Stada shares to take part in the selection ofindependent supervisory board candidates for the Aug. 26 vote, assisted by executive search firm Spencer Stuart.

"We ... no longer have any faith in the ability of thecurrent management to conduct the process to select newcandidates," Active Ownership said in a statement.

($1 = 0.9080 euros) (Editing by Jane Merriman)