Major life insurers will release by the end of this month guidelines detailing how they will try to reflect their opinions at shareholders' meetings for the companies in which they hold stakes, industry sources said Wednesday.

The move is in line with recent guidelines set by the Financial Services Agency for institutional investors, modeled after Britain's Stewardship Code. It seeks to enhance companies' corporate value and growth through constructive dialogue with investors.

The guidelines would, for example, prompt the life insurers to disclose that they have opposed proposals at shareholders' meetings, to show they have used their voting rights to improve management of the company, instead of complacently sitting through the sessions.