After attending courses at a journalism school and editorial stations in his family's media company, Ringier completed a trainee program at Heinrich Bauer Verlag in Hamburg in 1976/77.

[4] In January 2018, Ringier announced at the Group Executive Board meeting that Marc Walder had become an equity partner holding a stake of 10%.

[8] In November 2017, Ringier’s name appeared in press reports in connection with payments made in 2015 and 2016 to Beatrix Ruf, the then artistic director of the Stedelijk Museum Amsterdam, which lead to her resignation.

Ringier, a former employer of Ruf, confirmed paying a departing “thank you gift” in installments over 2015 and 2016 for her successfully increasing the value of his personal collection.

[10][2] In January 2022, Michael Ringier dealt with accusations, arising out of Ringier’s CEO Marc Walder’s statements at a board meeting the previous year, of allegedly pro-government Covid coverage which escalated to allegations that journalism at Ringier was “carried out according to instructions,” marking them as “an absolutely malicious defamation of the daily work of many competent and extremely serious journalists at Ringier.”[11] In November 2022, it was reported that Michael Ringier and Marc Walder, as well as Ringier-AG, had started legal action against the finance news portal “Inside Paradeplatz GmbH” and its operator and owner Lukas Hässig, for violation of personal rights.