Bloomberg reporting that Citigroup will come under direct supervision when Citibank EU and Citibank International come together

The merger is likely to see the new entity breach the €30bn asset threshold and thus put it under the watchful gaze of the ECB. It's likely to happen after the Jan 1st merger which will bring together assets of over €50bn

If the ECB do undertake supervision then they will have oversight on the board and senior management appointments