A Facebook Inc. investor urged the social network to eliminate its supervoting stock, which would diminish Chief Executive Mark Zuckerberg’s control of the company.

In a securities filing Monday, NorthStar Asset Management Inc. Funded Pension Plan backed a shareholder proposal that would prod Facebook to give all shares a single vote.

Over the last decade, investors have become increasingly concerned with the environmental and social impact of their investments across asset classes. Given the large social and environmental footprints of publicly traded corporations, and the persistently high allocation to public equities in most investor portfolios, public equity investing presents a major opportunity for impact investing. Yet impact investing, as currently practiced, concentrates primarily on small-scale direct investments in private equity and debt. Many investors perceive that social and environmental impact can be more readily observed there than in publicly traded companies, where ownership is intermediated, diluted, and diffused through secondary capital markets.

After fruitful negotiations with NorthStar Asset Management, Inc., a Boston-based wealth management firm, Intel Corporation will become the first U.S. corporation to commit to reviewing its political contributions for congruence with its company policies (such as the Intel Code of Conduct, Environmental, Health, & Safety Policy, Climate Change Policy, and Water Policy). NorthStar began this engagement with Intel last fall with the filing of a shareholder proposal on behalf of its pension plan, in which the firm conveyed its concern for potential misalignments between what Intel stands for and how the corporation spends its political giving dollars.