Firearms maker Sturm, Ruger & Co. said Wednesday it would heed a shareholder call to publicly detail what the firm is doing to prevent gun violence.

The resolution was put forward by a small coalition of investors who began buying gun stocks two years ago so that they could pressure executives for change, Sister Judy Byron, a nun with the Adrian Dominican Sisters, said in an interview earlier this year. Their efforts received little attention before a February shooting left 17 people dead at a Parkland, Fla., high school.

Since then, major asset managers including BlackRock Inc., the gunmaker’s largest shareholder, have been ratcheting up pressure on the firearms industry. BlackRock hasn’t disclosed how it voted in Sturm, Ruger’s case, but it warned gun industry executives in March that it could vote against management on shareholder proposals.

A majority of shareholders voted in favor of the proposal, company executives said Wednesday during the annual meeting in Phoenix. Shares rose 4.6% to $60.35, a 10-month high.

However, the company angered some shareholders by refusing to meet individual investors and interest groups seeking more information on the company’s potential exposure to litigation and efforts to develop smart-gun technology.