S&P Global · 2026-06-04 · major
S&P 500 Rejects Fast-Track Entry Rule Change for SpaceX, OpenAI, and Anthropic — Index Committee Keeps the 12-Month Seasoning, 10% Float, and GAAP Profitability Bars, Putting an Estimated $14B/$8B/$4.6B in Passive Buying Through the Standard Queue
S&P Dow Jones Indices kept the 12-month seasoning, 10% public float, and GAAP profitability bars intact, denying SpaceX, OpenAI, and Anthropic an accelerated path into the S&P 500 after their IPOs.
S&P Dow Jones Indices keeps the seasoning, float, and profitability bars intact, so OpenAI and Anthropic must wait at least a year after IPO before joining the index.
Key specs
| Seasoning bar | 12 months |
|---|---|
| Public float bar | 10% |
| Bloomberg intelligence passive buy — space x | $14B |
| Bloomberg intelligence passive buy — open ai | $8B |
| Bloomberg intelligence passive buy — anthropic | $4.6B |
What is it?
S&P Global rejected proposed amendments to the S&P 500's eligibility rules that would have let mega-cap, recently-public companies enter the benchmark on a fast-track. The decision, announced Thursday, June 4, 2026, applies to SpaceX, OpenAI, and Anthropic — three of the most anticipated AI-era IPOs.
How does it work?
The S&P 500 committee left three core gates in place: a 12-month post-IPO seasoning period, a 10% minimum public-float requirement, and a GAAP profitability screen (positive net income over the last four quarters). S&P's official statement said exceptions to financial viability, seasoning, and Investable Weight Factor rules "should not be granted solely based on market capitalization." The committee declined a proposal that would have shortened the seasoning period to six months and waived the float minimum for the largest IPOs.
Why does it matter?
Bloomberg Intelligence estimates the rejection withholds roughly $14B of automatic passive buying from SpaceX, $8B from OpenAI, and $4.6B from Anthropic — the dollar amounts that would have flowed in from S&P 500 index funds had fast-track entry been granted. Both Anthropic (which confidentially filed its S-1 on June 1) and OpenAI (targeting an autumn IPO) now face the same one-year-plus wait as any other listing, even after their offerings price.
Who is it for?
AI-IPO watchers, capital-markets analysts, passive-fund LPs
Try it
Read S&P's statement and methodology updates at spglobal.com/spdji