Who is the biggest shareholder of Roche?

Could you please elaborate on the identity of the largest shareholder in Roche? Are there any publicly available records that reveal this information? Are there any specific reasons why this shareholder holds a significant stake in the company? Also, has there been any change in the shareholder structure recently, particularly with regards to the largest shareholder? Understanding the ownership landscape of Roche can offer valuable insights into its corporate governance and strategic direction.