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AI Company Public Market Access: S&P 500 Rejects SpaceX Fast-Track, Closing Path for OpenAI and Anthropic · history

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2026-06-26 02:18 UTC · 587 items

What

Three AI-adjacent companies are navigating public markets at different speeds. SpaceX completed its IPO at $135/share on June 11 [4], rose 19% on its first trading day to $160.95 [5][6], had its greenshoe fully exercised for $85.7B in total proceeds [7], and has since settled to roughly $156/share with a reported $2.1T diluted market cap. [10] Anthropic filed a confidential S-1 on June 1 at a ~$965B valuation [20]; one social media source claims an October 2026 listing target and $47B annualized revenue, though this is unverified. [22] OpenAI filed its S-1 on June 8 [11] but publicly states the offering could be 'a while' away, [13] with leaked 2025 financials showing $13.07B revenue against a net GAAP loss of ~$38.5B–$39B. [15] S&P Dow Jones Indices rejected rule changes that would have loosened GAAP profitability requirements, keeping both labs out of the index. [1]

Why it matters

SpaceX's completed IPO at record proceeds sets a public-market reference point that neither AI lab can match on current fundamentals. How investors and index committees read OpenAI's large but mostly non-cash GAAP losses will determine whether S&P 500 inclusion is possible in any near-term window. Anthropic's simultaneous exposure to compute sourcing negotiations, U.S. government access restrictions, and an unresolved White House lobbying effort illustrates that government relations are now material IPO risk factors alongside financials.

Open questions

  • Altman has reportedly hinted the OpenAI IPO could come 'within next year' [19], while a separate report placed the actual offering in 2027 [18] and OpenAI itself says it could be 'a while' [13] — which timeline is operative?

  • An unverified social media claim puts Anthropic's IPO listing target at October 2026 [22] — is that consistent with the confidential S-1 filing timeline, and has any credible source confirmed it?

  • Did Anthropic successfully persuade the White House to lift the foreign-national access restriction on Fable 5 [26], and if not, how does that restriction affect the investor narrative at the $965B valuation? [20]

  • Will S&P's GAAP profitability test treat non-cash stock compensation as disqualifying, or will IPO underwriters frame a non-GAAP cash-loss figure of roughly $8B as the operative measure for prospective investors? [16][1]

Narrative

S&P Dow Jones Indices announced on June 4, 2026 that it would not change S&P 500 eligibility rules, rejecting proposals that would have waived the GAAP profitability requirement and shortened the seasoning window for newly listed companies. [1][2] The proposals had drawn criticism because they appeared designed to fast-track SpaceX, which does not meet the standard of positive earnings in the most recent quarter and cumulatively over the prior four quarters. Passive-investor advocates warned the proposed changes would coerce roughly $30 trillion in retirement funds into buying speculative IPO exposure; the S&P committee sided with them. [3]

SpaceX proceeded regardless. Shares priced at $135 on June 11 [4] and rose 19% on the first trading day to close at $160.95, immediately making SpaceX roughly the sixth-largest company by market cap at approximately $1.8 trillion. [5][6] After the greenshoe option was fully exercised, total proceeds reached $85.7 billion, reported as the largest IPO in recorded history. [7] SpaceX's SEC filings project a $28.5 trillion total addressable market with AI as the dominant component, and disclose a compute arrangement with Anthropic and Google totaling roughly $26 billion per year. [8][9] By late June the stock had pulled back to around $156, giving a reported $2.1T diluted market cap. [10]

OpenAI filed its confidential S-1 with the SEC on June 8, eight days after Anthropic, with Goldman Sachs and Morgan Stanley advising. [11][12] The company publicly stated the timeline could be 'a while,' and Fast Company characterized the filing as an exercise in carefully managed expectations. [13] Leaked financial documents show 2025 revenues of $13.07B against an operating loss of approximately $21B and a net GAAP loss of ~$38.5B–$39B. [14][15] The gap between the operating and net loss figures consists largely of non-cash stock-based compensation; one analysis noted the same spreadsheet yields a ~$39B GAAP loss or an ~$8B cash loss depending on accounting treatment, a distinction that will matter to index eligibility tests. [16] A subsequent report placed Q1 2026 revenue at $5.7B with $3.7B in cash burn for the quarter, suggesting the annual revenue run rate has accelerated above the 2025 pace. [17] Sam Altman has hinted at a listing 'within next year,' while a separate report placed the actual offering in 2027. [18][19]

Anthropic filed a confidential S-1 with the SEC on June 1 at a $965B valuation, with annualized revenues tracking toward $45B–$47B. [20][21][22] Before filing, Anthropic entered talks with Microsoft to run Claude on Microsoft's custom Maia 200 AI chip — a TSMC 3nm design launched in January 2026 — following Microsoft's $5 billion investment. [23][24] Those talks remain ongoing alongside existing compute relationships with Google and Amazon disclosed in SpaceX's own S-1. [9] In mid-June, a U.S. government order restricted foreign-national access to Fable 5 and another advanced model; Anthropic reportedly went to the White House to lobby for reversal less than three weeks after filing its IPO papers. [25][26] Anthropic also publicly backed Trump's AI Executive Order on voluntary frontier benchmarks, cyber hardening, and industry cooperation. [27]

Timeline

  • 2026-05-21: Anthropic enters talks with Microsoft to use the Maia 200 AI chip, following Microsoft's $5B investment. [23][24]
  • 2026-05-29: Passive-investor advocates warn proposed S&P 500 rule changes would force $30T in retirement funds to buy SpaceX at IPO valuations. [3]
  • 2026-05-30: SpaceX files an S-1 for an IPO targeting ~$1.75T valuation, disclosing ~$26B/year in compute revenue from Google and Anthropic. [9][35][36]
  • 2026-05-31: Reports emerge that OpenAI is preparing a confidential IPO filing with Goldman Sachs and Morgan Stanley, targeting September 2026. [37][38]
  • 2026-06-01: Anthropic announces confidential S-1 submission to the SEC, disclosing a $965B valuation, $65B Series H, and annualized revenues tracking toward $45B. [20][39][21][40]
  • 2026-06-04: S&P Dow Jones Indices rejects proposed rule changes, maintaining 12-month seasoning and GAAP profitability requirements for S&P 500 inclusion. [2][28][1]
  • 2026-06-08: OpenAI files a confidential S-1 with the SEC; the company states no timeline is set and it 'may be a while' before an offering. [11][41][12][13]
  • 2026-06-09: Perplexity CEO Aravind Srinivas confirms a 2028 IPO target; Polymarket odds for OpenAI IPO by end of 2026 stand at 71%. [30][42][31]
  • 2026-06-10: One report suggests OpenAI is now targeting 2027 for its actual listing. [18]
  • 2026-06-11: SpaceX finalizes IPO price at $135 per share; IPO order book approximately four times oversubscribed. [4][43][44]
  • 2026-06-12: SpaceX begins trading on NASDAQ, rising 19% to close at $160.95, immediately becoming roughly the sixth-largest company by market cap at ~$1.8T. [5][6][45]
  • 2026-06-16: Leaked OpenAI financial documents show 2025 revenues of $13.07B, an operating loss of ~$21B, and a net GAAP loss of ~$38.5B–$39B including large non-cash stock compensation. [14][46][33][15][47]
  • 2026-06-16: The U.S. government orders Anthropic to restrict foreign-national access to Fable 5 and another advanced model; Anthropic goes to the White House to lobby for reversal. [25][26]
  • 2026-06-17: Anthropic publicly backs Trump's AI Executive Order on voluntary frontier benchmarks, cyber hardening, and industry cooperation. [27]
  • 2026-06-18: Sam Altman reportedly hints the OpenAI IPO will come 'within next year,' leaving the offering window between 2026 and mid-2027. [19]
  • 2026-06-20: SpaceX greenshoe option fully exercised; total IPO proceeds confirmed at $85.7B, reported as the largest IPO in recorded history. [7]
  • 2026-06-21: One report places OpenAI Q1 2026 revenue at $5.7B with $3.7B in cash burn, suggesting the annual revenue run rate has nearly doubled from 2025. [17]
  • 2026-06-25: SpaceX stock settles to roughly $156/share with a reported $2.1T diluted market cap, confirming a pullback from the first-day close of $160.95. [10]

Perspectives

S&P Dow Jones Indices

Upheld existing S&P 500 eligibility rules on June 4, rejecting proposed changes that would have waived the profitability requirement and shortened the seasoning window.

Evolution: Consistent with historical standards; OpenAI's net GAAP loss of ~$38.5B–$39B against $13B in revenue illustrates the scale of the gap the committee's decision kept in place, though the non-cash composition of that loss is now contested.

[2][28][1]

SpaceX

IPO priced at $135/share, rose 19% on the first trading day, and after greenshoe exercise total proceeds reached $85.7B; SEC filings project a $28.5T TAM and disclose ~$26B/year in compute revenue from Google and Anthropic.

Evolution: Moved from S-1 filing to completed trading and greenshoe exercise; stock has pulled back from its first-day close to around $156 with a $2.1T diluted market cap.

[5][6][8][9][7][29][10]

OpenAI / Sam Altman

Filed confidential S-1 on June 8 with no fixed timeline; publicly says the offering could be 'a while' away while Altman has hinted at a listing 'within next year.' Leaked 2025 financials show a net GAAP loss of ~$38.5B–$39B against $13.07B in revenue, though the bulk of that loss is non-cash stock compensation; Q1 2026 revenue is reported at $5.7B.

Evolution: Filed within a week of Anthropic while publicly downplaying urgency; the loss interpretation debate adds disclosure complexity, and the actual listing window — 2026 vs. 2027 — remains publicly unresolved.

[11][12][18][14][15][19][17][16][13]

Anthropic

Filed confidential S-1 on June 1 at a $965B valuation and ~$45B–$47B annualized revenue run rate; simultaneously in talks with Microsoft over Maia 200 chip access, lobbying the White House over Fable 5 restrictions, and publicly backing Trump's AI Executive Order.

Evolution: First formal public-market move; Maia 200 chip talks, Fable 5 access restrictions, and White House lobbying add compute sourcing and government-relations risk factors beyond what was visible at the time of filing. An unverified source now claims an October 2026 listing target.

[20][21][24][25][26][27][22]

Perplexity / Aravind Srinivas

Plans a 2028 IPO and describes himself as agnostic about the Anthropic and OpenAI filings; argues the next AI phase will favor compute efficiency over raw scale.

Evolution: Consistent since first stated; positions Perplexity as deliberately outside the frontier-lab IPO rush.

[30][31]

Hedgeye / passive-investor advocates

Argued proposed S&P rule changes would coerce passive retirement funds into buying speculative companies at IPO valuations; praised the committee for holding its profitability rule.

Evolution: Directionally consistent; OpenAI's ~$39B GAAP loss gives a concrete illustration of the profitability gap they warned about, though the non-cash composition of that figure partially complicates their case.

[3][32][14][33][16]

Databricks CEO / industry skeptics

Called 2026 'a terrible year to go public,' citing the crowded AI IPO pipeline and market conditions.

Evolution: SpaceX's strong first-day performance and record greenshoe proceeds partially undercut this view, but OpenAI's continuing losses and Anthropic's regulatory complications are consistent with the skeptical case.

[34][14][33][7]

Tensions

  • OpenAI's leaked 2025 financials show a net GAAP loss of ~$38.5B–$39B against $13.07B in revenues [15][33], directly illustrating how far OpenAI is from the GAAP profitability S&P Dow Jones requires — the same standard passive-investor advocates defended when S&P rejected the rule changes. [1] [15][33][1][3]
  • The same OpenAI financials can be read as a ~$39B GAAP loss or an ~$8B cash loss depending on whether non-cash stock compensation is included; analysts disagree on which figure is most relevant for evaluating IPO prospects and index eligibility. [16][15] [16][15][1]
  • Altman said publicly OpenAI was not chasing Anthropic's IPO timeline, yet filed OpenAI's S-1 eight days after Anthropic's; he has since reportedly hinted at a listing 'within next year' [19] while a separate report placed the actual offering in 2027 and the company publicly says it could be 'a while.' [18][13] [11][20][18][19][13]
  • SpaceX's $85.7B total proceeds and strong debut [7][5] partially undercut the Databricks CEO's claim that 2026 is 'a terrible year to go public,' though Anthropic's government-relations complications and OpenAI's uncertain listing timeline are consistent with the skeptical view. [7][5][34][18]
  • If the reported Q1 2026 OpenAI revenue of $5.7B [17] is accurate, it implies a run rate nearly double the 2025 annual figure — but revenue growth alone does not close the GAAP profitability gap S&P requires, and passive-investor advocates argued the labs' fundamentals don't support their valuations. [3][1] [17][3][1]
  • Anthropic is negotiating compute access from Microsoft's Maia 200 chip [24] while its existing compute relationships with Google and Amazon are disclosed as material in SpaceX's own IPO filings [9], creating potential tension between Anthropic's multi-cloud ambitions and its existing partner commitments ahead of its IPO. [24][9]

Sources

  1. [1] S&P 500 rejects SpaceX, also blocking entry for OpenAI and Anthropic — Ars Technica AI (2026-06-05)
  2. [2] S&P Dow Jones Indices announced on June 4, 2026, that it rejected proposed rule changes for faster S&P 500 inclu... — reactive:ai-ipo-public-markets (2026-06-05)
  3. [3] Hedgeye on X: "Rule changes for the SpaceX $SPCX IPO: Index providers waived the profitability requirement and cut the seasoning window from 90 days to 5. This forces over $30 trillion in passive 401k and retirement money to buy SpaceX at IPO valuations. Bloomberg Intelligence estimates S&P" / X — reactive:ai-ipo-public-markets
  4. [4] SpaceX Finalizes IPO Price at $135 a Share in World's Largest ... — reactive:ai-ipo-public-markets
  5. [5] SpaceX is now a public company valued for its AI potential, so what comes next? — Ars Technica AI (2026-06-12)
  6. [6] BREAKING: SpaceX closes 19% above IPO pricing on its first day of trading, immediately becoming the sixth-largest compan... — reactive:ai-ipo-public-markets (2026-06-14)
  7. [7] The biggest IPO in human history just happened and most people are still focused on the stock price when the real story … — Milk Road AI Twitter (2026-06-20)
  8. [8] The official SEC filings of @SpaceX says AI accounts for almost all of its expected $28.5 trillion total addressable mar… — Rohan Paul Twitter (2026-06-12)
  9. [9] SpaceX files S-1 IPO — reveals $1.25B/month compute deal with Anthropic — reactive:ai-ipo-public-markets (2026-05-30)
  10. [10] $SPCX sits at $156 with a $2.1 trillion diluted market cap and the author — who normally buys discounted software like $... — reactive:ai-ipo-public-markets (2026-06-25)
  11. [11] BREAKING: WSJ reports OpenAI just made its first formal move toward IPO. — Rohan Paul Twitter (2026-06-08)
  12. [12] OpenAI confirms confidential S-1 filing with the SEC for an IPO but says no fixed timeline, noting it "may be a while" a... — reactive:ai-ipo-public-markets (2026-06-09)
  13. [13] ‘It may be a while’: OpenAI carefully manages expectations with its much-anticipated IPO announcement — reactive:ai-ipo-public-markets
  14. [14] Leaked financial docs show OpenAI is losing billions of dollars a year — Ars Technica AI (2026-06-16)
  15. [15] OpenAI’s 2025 financials show $13.07B revenue against $34B in spending and a $38.5B–$39B net loss as IPO preparations mo... — reactive:ai-ipo-public-markets (2026-06-16)
  16. [16] OpenAI Lost $39 Billion Last Year. Or $8 Billion. Same Spreadsheet. — reactive:ai-ipo-public-markets
  17. [17] OpenAI burned through $3.7 billion in Q1 2026 — more than half of its $5.7 billion in revenue for the quarter. Both numb... — reactive:ai-ipo-public-markets (2026-06-21)
  18. [18] JUST IN: OpenAI now expected to go public next year, delaying earlier IPO timing. Market factor: shifting timeline could... — reactive:ai-ipo-public-markets (2026-06-10)
  19. [19] OpenAI IPO: Sam Altman Reportedly Reveals Timeline, Hints At ... — reactive:ai-ipo-public-markets
  20. [20] Anthropic confidentially submits draft S-1 to the SEC — Anthropic News (2026-06-01)
  21. [21] Anthropic files to go public - TechCrunch — reactive:anthropic-partnerships-expansion
  22. [22] Anthropic filed its S-1 quietly in June — $965B valuation, October IPO target, $47B annualized revenue. The asterisk: th... — reactive:ai-ipo-public-markets (2026-06-23)
  23. [23] Anthropic in talks to use Microsoft's AI chips, The Information reports — reactive:anthropic-rapid-ascent
  24. [24] Anthropic, Microsoft in talks about Maia AI chip deal — reactive:anthropic-rapid-ascent (2026-05-22)
  25. [25] The U.S. government ordered Anthropic to cut off all foreign nationals from its two most advanced AI models, Fable 5 and... — reactive:ai-ipo-public-markets (2026-06-16)
  26. [26] Anthropic walked into the White House Monday to argue its own models back into existence — two weeks after filing IPO pa... — reactive:ai-ipo-public-markets (2026-06-17)
  27. [27] Anthropic backs Trump's new AI Executive Order: voluntary frontier benchmarks, cyber hardening, industry co-op. Smart ti... — reactive:ai-ipo-public-markets (2026-06-17)
  28. [28] S&P keeps door closed to mega-IPOs. The index provider will keep a 12-month seasoning rule and GAAP profitability te... — reactive:ai-ipo-public-markets (2026-06-04)
  29. [29] SpaceX stock falls back to Earth🛬 — reactive:ai-ipo-public-markets (2026-06-18)
  30. [30] Perplexity just said it plans a 2028 IPO no matter how Anthropic, OpenAI, or SpaceX trade when they hit public markets. — Rohan Paul Twitter (2026-06-09)
  31. [31] Perplexity is sticking to its plan for a 2028 IPO as Anthropic and OpenAI race to market: CEO Aravind Srinivas said the ... — reactive:ai-ipo-public-markets (2026-06-09)
  32. [32] Great job from the S&P 500 committee for staying firm on their positive net income rule. SpaceX, Anthropic and OpenA... — reactive:ai-ipo-public-markets (2026-06-05)
  33. [33] OpenAI's financials have leaked, showing $21B in losses against $13B in revenue — reactive:ai-ipo-public-markets (2026-06-16)
  34. [34] 🟡 What your grandkids will remember — Semafor Technology (2026-06-10)
  35. [35] SpaceX is going public at a $1.75 trillion valuation. The world's biggest IPO ever. — reactive:ai-ipo-public-markets (2026-06-05)
  36. [36] 🚀 Seguimiento SpaceX IPO: ~$26 mil millones/año solo de Google + Anthropic por compute en Colossus (S-1). — reactive:ai-ipo-public-markets (2026-06-06)
  37. [37] @CryptoMilox OpenAI's prepping a confidential IPO filing with Goldman & Morgan Stanley right now, eyeing Sept 2026. ... — reactive:ai-ipo-public-markets (2026-05-31)
  38. [38] OpenAI aiming for speedy IPO, source says - Reuters — reactive:ai-ipo-public-markets
  39. [39] Anthropic just took the formal first step toward its IPO. — Rohan Paul Twitter (2026-06-01)
  40. [40] Anthropic confidentially submits draft S-1 to the SEC — reactive:anthropic-rapid-ascent
  41. [41] 🚨 OpenAI confirms confidential IPO filing, no timeline set. $OPENAI https://t.co/Kf2lZw5RZL — reactive:ai-ipo-public-markets (2026-06-09)
  42. [42] POLYMARKET ODDS OF AN OPENAI IPO BY DECEMBER 31, 2026 ARE NOW AT 71% — reactive:ai-ipo-public-markets (2026-06-09)
  43. [43] SpaceX plans to set IPO price at $135 per share, targeting ... - Reuters — reactive:ai-ipo-public-markets
  44. [44] SPCX perp -27% as SpaceX IPO books run ~4x oversubscribed on a $1.8T valuation, demand vs target, pricing Thursday, tr... — reactive:ai-ipo-public-markets (2026-06-10)
  45. [45] SpaceX Stock | Hiive Price $151.27 | Invest or Sell — reactive:ai-ipo-public-markets
  46. [46] FT: OpenAI is growing fast, but its numbers show how expensive frontier AI has become. — Rohan Paul Twitter (2026-06-16)
  47. [47] OpenAI Losses Increased Nearly 8X in 2025, With Spending Hitting ... — reactive:ai-ipo-public-markets