S&P Dow Jones Indices concluded its market consultation on potential methodology changes for megacap companies across its major U.S. equity benchmarks.
The Index Committee decided to retain existing criteria for the S&P 500, S&P MidCap 400, and S&P SmallCap 600, providing no special exemptions for newly listed megacap firms.
Proposals to shorten the IPO seasoning period from 12 months to 6 months were rejected, maintaining the requirement that a company must trade on an eligible exchange for a full year before index eligibility.
The committee also rejected waiving the positive net‑income rule; prospective additions such as SpaceX, OpenAI and Anthropic must demonstrate GAAP profitability over the most recent four quarters.
The decision emphasizes consistent rule application and prevents market‑capitalization‑only based entry, preserving the integrity of the benchmarks.
