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S&P Dow Jones Indices rejected proposed rule changes on June 4, 2026, maintaining its 12-month seasoning window and GAAP profitability requirements for S&P 500 inclusion — blocking fast-track entry for SpaceX, Anthropic, and OpenAI. [1][2] Anthropic filed a confidential S-1 with the SEC on June 1, disclosing a $965B post-money valuation and annualized revenues tracking toward $45B. [6] OpenAI is preparing its own filing with Goldman Sachs and Morgan Stanley, targeting September 2026. [9] SpaceX's IPO, expected around June 12 at a roughly $1.75T valuation, disclosed a compute arrangement with Anthropic and Google totaling approximately $26B per year. [12][11]

S&P 500 membership directs automatic purchases from roughly $30 trillion in passive index funds, making the index's eligibility rules a significant determinant of post-IPO capital flows. [15] By upholding its profitability standard, S&P ensured those funds cannot be directed to any of these three companies until they demonstrate sustained GAAP earnings — a standard none currently meets. Fortune's analysis adds that S&P exclusion does not fully insulate retirement savers, who may still gain exposure to SpaceX through 401(k) plans via other vehicles. [13]

S&P Dow Jones Indices announced on June 4, 2026 that it would not change its S&P 500 eligibility rules, rejecting proposals that would have waived the profitability requirement and shortened the seasoning window for newly listed companies. [1][2] The proposals had drawn public criticism because SpaceX — preparing an IPO at roughly $1.75 trillion — does not meet the existing requirement of positive GAAP earnings in the most recent quarter and cumulatively over the prior four quarters. [3][4] The rejection means SpaceX cannot join the index immediately upon listing, and the same standard applies to Anthropic and OpenAI once they complete their own offerings. [1] In contrast, Nasdaq reportedly shortened its seasoning window to 15 days and Russell/FTSE to five days, leaving open whether those smaller-scale inclusions offer a meaningful substitute for S&P 500 passive-fund buying. [5]

Anthropic filed the first formal move toward public markets among the leading AI companies. On June 1, the company announced it had confidentially submitted a draft S-1 to the SEC, disclosing a $965 billion post-money valuation from its $65 billion Series H led by Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital, and annualized revenues tracking toward $45 billion. [6] No pricing or share count has been set; a public offering can proceed only after SEC review is complete and market conditions permit. Wedbush Securities argued the filing could open the IPO pipeline for the broader AI sector, while contrarian observers have noted that IPO order is unlikely to determine competitive outcomes in a large technology wave. [7][8]

OpenAI is reportedly preparing its own confidential filing with Goldman Sachs and Morgan Stanley, targeting September 2026. [9] Sam Altman has said publicly that OpenAI is not adjusting its timeline in response to Anthropic's S-1 submission. [10] SpaceX's own S-1, ahead of an IPO expected around June 12, reportedly disclosed a compute arrangement with Anthropic and Google totaling roughly $26 billion per year for access to its Colossus infrastructure — a figure that, if accurate, bears directly on Anthropic's cost structure and its timeline to the GAAP profitability required for any future S&P 500 eligibility. [11][12]

Fortune and other outlets have noted that the S&P rejection does not fully protect retirement savers from SpaceX exposure: 401(k) plans and other retirement vehicles may still hold SpaceX shares through private-market allocations or secondary funds, meaning the passive-fund boundary that index eligibility rules enforce is narrower than it might appear. [13] None of the three companies currently meets the S&P 500's GAAP profitability standard, meaning all will need to demonstrate sustained earnings before qualifying — a process that under current rules takes at least 12 months post-listing. [1][14]