Institutional Shareholder Services (ISS) is facing a Securities and Exchange Commission enforcement action after declining to provide documents requested by the regulator. The SEC filed the application on September 4, 2026, in federal court, seeking to compel the proxy advisory firm to comply with an administrative subpoena issued in July. The dispute has drawn renewed regulatory attention to ISS's operations.

SEC Action Targets ISS Subpoena Compliance

The SEC filed its application in the U.S. District Court for the Eastern District of Pennsylvania. The agency is seeking an order requiring ISS to produce outstanding records. Courts generally defer to agency subpoenas when the request is within the agency's jurisdiction and the information sought is relevant, making compelled compliance applications of this kind difficult for respondents to defeat.

According to the SEC filing, agency examination staff initially made routine information requests to ISS, but the firm declined to fully comply with those requests. The SEC subsequently issued an administrative subpoena on July 21, 2026, and says ISS has continued refusing to provide all requested materials.

The subpoena seeks documents connected to an investigation into ISS's compliance with federal securities laws. The SEC said the missing records have hindered its examination and enforcement work.

ISS operates as an investment adviser registered with the SEC, and the regulator described itself as the firm's primary regulator in the court filing. Registered investment advisers are subject to periodic SEC examinations under the Investment Advisers Act of 1940, and refusing to comply with an administrative subpoena can itself carry consequences. The SEC said the requested records relate directly to its statutory oversight responsibilities and linked the investigation to its investor protection duties.

Eric Balchunas, senior ETF analyst at Bloomberg, drew attention to the action in a post on X:

The SEC has issued an enforcement action against ISS (the co that controls half the proxy voting outsource mkt and is known to push ESG on corporations) for not complying w a subpoena and refusing to hand over documents etc. pic.twitter.com/EmjzE71PM8 — Eric Balchunas (@EricBalchunas) September 5, 2026

ISS Proxy Recommendations Draw Regulatory Attention

ISS has faced broader scrutiny over its influence on corporate shareholder votes. Balchunas reported the SEC action and pointed to the firm's market position, describing ISS as controlling about half of the proxy voting outsourcing market. He also referenced recent criticism surrounding the firm's approach to environmental, social, and governance (ESG) issues. The scrutiny reflects a long-running debate over the concentrated influence of proxy advisers, whose recommendations are widely used by institutional investors that outsource voting decisions across large portfolios of holdings.

Matthew Sigel, head of digital assets research at VanEck, separately discussed the wider scrutiny facing proxy advisory firms. He pointed to Glass Lewis recommendations involving gender-diversity targets for corporate boards and described a policy at VanEck requiring portfolio managers to explain overrides of Glass Lewis recommendations. His comments placed ISS and Glass Lewis within the same broader debate.

ISS and Glass Lewis remain prominent names in proxy advisory services, and their recommendations can influence how shareholders approach corporate voting decisions.

Elon Musk has previously criticized the influence of proxy advisers and passive fund structures, and Balchunas referenced those earlier comments while discussing the latest SEC action.

The current case centers on subpoena compliance rather than the merits of any specific proxy recommendation. The SEC is now seeking judicial enforcement of its outstanding information request. If the court grants the application, ISS would face potential contempt sanctions for continued noncompliance; the underlying securities-law investigation, however, remains at an information-gathering stage and no charges have been announced.