The SEC has proposed optional semiannual reporting for U.S. public companies, replacing three quarterly 10-Q filings with a single new Form 10-S. A 60-day comment period will determine whether the 55-year quarterly Earnings mandate survives intact.

Key highlights

  • Three annual Form 10-Q filings replaced by a single Form 10-S for companies that elect the change.
  • Filing deadline set at 40 or 45 days post-period end, depending on filer status.
  • Regulation S-X also amended to simplify financial statement requirements under the new regime.
  • 60-day public comment period opens before any final SEC vote.
  • S&P 500 quarterly reporting rules create a structural friction point for index providers.

What the SEC proposed

On May 5, 2026, the SEC published proposed amendments allowing U.S. public companies subject to Exchange Act Sections 13(a) or 15(d) to file semiannual reports instead of quarterly ones. Companies electing the change would file one Form 10-S covering the first six-month period, plus their existing Annual Report, reducing mandatory filings from four to two per year. The proposal also amends Regulation S-X to reflect the new structure and simplify existing financial statement requirements. Filing deadlines would be 40 days for accelerated and large accelerated filers, 45 days for others. The election is made on the annual filing; most companies could not act until early 2027.

The case for change

SEC Chairman Paul Atkins has framed the proposal as a flexibility measure, arguing the current quarterly mandate applies uniformly regardless of Business model or company size, imposing a disproportionate compliance burden on smaller issuers. Supporters, including major exchanges and some large corporations, contend the quarterly cycle also fosters short-termism, pulling management attention toward near-term results at the expense of long-range Capital allocation. Proponents argue reduced compliance friction could improve the Economics of going public and partially reverse the sustained decline in U.S.-listed companies, though the causal link to IPO activity remains speculative.

The transparency trade-off

Buy-Side institutions raise substantive objections. Quarterly filings are not merely compliance documents; they are regular accountability checks that allow investors to monitor capital allocation, governance, and earnings trajectory in near real time. Extending the mandatory interval to six months creates windows of information asymmetry, advantaging insiders and those with access to alternative data over investors relying solely on public filings. The SEC's own proposal acknowledges these risks, citing potential delays in material information, reduced market participation, weaker governance monitoring, and a probable increase in the Cost of Capital for companies that shift to less frequent reporting. The commission also explicitly sought comment on whether the change would elevate Insider Trading risk.

Index mechanics and market structure

The S&P 500 currently requires quarterly reporting from its constituents, meaning any meaningful shift among its members would pressure index providers to revise eligibility criteria and benchmark construction methodology, with Downstream effects on ETFs and passive mandates. The Nasdaq 100, by contrast, imposes no quarterly reporting condition, giving it considerably more structural flexibility if adoption accelerates. Companies on the semiannual regime may still issue voluntary quarterly press releases or hold earnings calls, but voluntary disclosures carry different legal standing and variable consistency across issuers, complicating the analytical work of fund managers and Equity research analysts.

The likely adoption curve

If the rule is adopted, uptake is unlikely to be immediate or uniform. Large-cap companies with broad institutional ownership face the strongest investor pressure to retain quarterly reporting regardless of what the rules permit, since any deviation risks being read as a signal of reduced transparency. Smaller and mid-sized companies, which carry a higher relative compliance cost and typically attract a less intensive analyst following, are the most probable early adopters. The reform grants optionality; it does not mandate a change. For at least the near term, U.S. equity markets would operate with two parallel reporting regimes, introducing a new variable into cross-company financial comparison and complicating sector-level analysis for institutional investors benchmarked to indices that have yet to resolve how to treat the divergence.