**The SEC's May 2026 proposal to make quarterly Form 10-Q filings optional—replacing them with a new semiannual Form 10-S—remains in the rulemaking stage with no final adoption as of mid-October 2026.** This keeps the implied probability of outright removal of the mandatory quarterly requirement at a low level, reflected in the 83.5% market-implied odds for "No." Investor and advisory pushback has been intense. The SEC's own Investor Advisory Committee recommended against eliminating the quarterly mandate, citing risks to timely information, market efficiency, and capital allocation. Comment letters showed record opposition from buy-side investors who value frequent standardized disclosures, even as the proposal preserves companies' ability to report quarterly voluntarily. The formal process—60-day comment period, staff review, potential modifications, and Commission vote—has extended timelines, with any final rule possibly not effective until 2027 or later. Historical precedent, including a similar unsuccessful push in Trump's first term, reinforces caution. While Chairman Paul Atkins and administration support signal continued momentum toward deregulation, the combination of structural hurdles, stakeholder resistance, and the absence of a completed rule sustains trader consensus around low odds of full removal. Key near-term catalysts include any updates on comment analysis or revised proposals ahead of a potential 2027 adoption window.