The agency, which manages near $6 trillion (£four.three trillion) in property, mentioned on Friday the assault had “pushed dwelling the horrible toll from gun violence in America”.
“We imagine that this occasion requires response and motion from a variety of entities throughout each the private and non-private sectors,” it added in an announcement.
“It has put a highlight on the position of companies that manufacture and distribute civilian firearms.”
The fund supervisor has posed a collection of safety-related inquiries to firearms producers and threatened to vote in opposition to administrators at companies it holds a significant stake in to implement change if wanted.
BlackRock mentioned its purchasers can even be provided the chance to keep away from investing in gun makers.
“Our accountability to have interaction and vote is extra essential than ever,” mentioned chief govt Larry Fink in a letter to firms wherein BlackRock invests.
“To prosper over time, firms should profit all of their stakeholders, together with shareholders, workers, clients and the communities wherein they function.”
The US monetary sector has been beneath stress to look at its dealings with the firearms trade after the Valentine’s Day shooting at Marjory Stoneman Douglas Excessive College in Parkland, which left 17 individuals useless.
The suspected gunman, 19-year-old Nikolas Cruz, has been charged with finishing up the assault – one of many deadliest in US historical past.
Regardless of BlackRock’s overtures, it has stopped in need of saying it’ll decide to an outright ban on funding in gun producers.
It’s the largest shareholder in publicly traded firearms firms American Outside Manufacturers and Sturm Ruger, and holds a sizeable stake in a 3rd, Vista Outside.
Nonetheless, it says this investment represents simply zero.01 per cent of its complete property.
BlackRock’s transfer got here days after US retailer Dick’s Sporting Items, of which it’s the largest single investor, introduced it might cease promoting assault rifles and finish gun gross sales to individuals beneath the age of 21.