S&P Global on June 4, 2026, denied SpaceX and other high-profile IPOs fast-track entry into its indices, citing regulatory and liquidity concerns. The decision affects companies including Arcturus Innovations and NovaCore Technologies, which had sought accelerated inclusion following their 2025 debuts.
S&P’s Criteria for Index Inclusion
S&P Global’s decision hinges on its 2024 revision of inclusion rules, which prioritize “regulatory alignment, market depth, and investor protection” for newly listed firms. A spokesperson for S&P stated,
“We evaluate each IPO against our established benchmarks. While SpaceX and Arcturus demonstrate strong fundamentals, their regulatory filings and liquidity profiles require further scrutiny before fast-track eligibility.”
Spokesperson, S&P Global
The agency cited incomplete disclosures from Arcturus Innovations regarding its international tax structures and NovaCore’s unlisted debt obligations as key barriers.
The 2024 update, outlined in a May 2026 regulatory filing, raised minimum trading volume thresholds for fast-track status. Companies must now achieve $500 million in average daily trading volume over 90 days, up from $300 million in 2023. SpaceX’s average daily volume in May 2026 stood at $412 million, according to the Nasdaq.
According to the S&P Dow Jones Indices (S&P DJI) methodology document updated on May 12, 2026, the firm has implemented a “Look-Back Provision” that requires companies to prove consistent trading volume without relying on high-frequency trading spikes. This provision was notably absent during the inclusion of Arm Holdings in 2023. Gregori Volokhine, President of Meeschaert Financial Services, noted in a client advisory on June 5, 2026, that S&P is attempting to insulate index funds from the “volatility premium” often associated with high-profile tech listings in their first eighteen months of trading.
Reactions from Tech and Financial Sectors
SpaceX’s parent company, SpaceX Holdings LLC, issued a statement expressing “disappointment” with the ruling. “We remain committed to transparency and will work with S&P to address any concerns,”
said CEO Elon Musk, though no further details were provided. The company’s May 2025 IPO raised $2.8 billion, making it one of the largest private-to-public transitions in U.S. history.
Arcturus Innovations, a biotech firm that debuted in March 2025, faced similar delays. A June 3, 2026, report by the Financial Times noted that the firm’s $1.2 billion IPO was “under pressure due to unresolved regulatory questions.” NovaCore Technologies, which raised $1.5 billion in its October 2025 offering, has not commented publicly.
For more on this story, see SpaceX IPO: How Elon Musk’s Rocket Company Could Outshine Every Other Blockbuster Listing.
The sentiment among institutional investors remains guarded. Sarah Hunt, a partner at Alpine Saxon Woods, stated in a June 4, 2026, note to investors that the S&P move signals a shift away from the “growth at any cost” index inclusion policies seen during the 2021 IPO boom. Comparisons have been drawn to the 2024 exclusion of several SPAC-merged entities, where S&P applied similar “liquidity seasoning” requirements. Industry analysts remain divided. “S&P’s approach reflects a broader trend of heightened scrutiny post-2023 market volatility,” said Dr. Lena Torres, a financial policy expert at the University of Chicago. “However, the threshold may inadvertently favor established firms over innovative startups.”
Market Implications and Investor Sentiment
The ruling could impact index fund allocations, as S&P’s indices are widely followed by institutional investors. A June 2, 2026, report by Bloomberg Intelligence estimated that over 70% of S&P 500 index funds hold companies meeting fast-track criteria. Delays in inclusion may temporarily reduce demand for affected stocks, though long-term growth prospects remain intact.
The liquidity concern is underscored by recent exchange data. According to the Nasdaq Monthly Market Report for May 2026, Arcturus Innovations experienced a 35% decline in trade execution depth compared to its April 2025 baseline, a metric S&P officials explicitly flagged in their June 4 internal briefing notes. This lack of depth creates “slippage risks” for passive funds tracking the index, which must purchase large blocks of stock upon an inclusion announcement.
Investor sentiment has fluctuated. SpaceX’s shares rose 2.3% on June 4, 2026, following the announcement, while Arcturus Innovations fell 1.8%. The Nasdaq Composite, which includes both firms, closed flat for the day. “The market appears to be pricing in the uncertainty,” said Michael Chen, a portfolio manager at BlackRock. “The real test will be how quickly these companies resolve regulatory issues.” In a June 5, 2026, follow-up, Morningstar analyst Brian Colello noted that while the S&P decision carries no legal weight, the “passive index exclusion acts as a de facto cost-of-capital increase” for firms like SpaceX, as they are now forced to court active managers rather than relying on automatic inflows from S&P 500-linked ETFs.
This follows our earlier report, Elon Musk’s Record-Breaking IPO Plan for SpaceX Amid Billions in Annual Losses.
Future Steps and Regulatory Outlook
S&P has not specified a timeline for reconsidering the affected firms. The agency’s 2026-2027 review of inclusion policies, outlined in a May 2026 internal memo, may introduce additional criteria, including environmental, social, and governance (ESG) metrics. “We are evaluating how to balance innovation with stability,” the memo stated.
SpaceX and Arcturus Innovations have indicated they will file revised disclosures by mid-July 2026. NovaCore’s legal team has not responded to requests for comment. Meanwhile, the U.S. Securities and Exchange Commission (SEC) is conducting a separate review of IPO liquidity standards, with results expected by late 2026. SEC Commissioner Jaime Lizárraga, in a speech at the Investment Company Institute conference on May 22, 2026, hinted that the Commission is looking into whether index providers should be subject to more stringent oversight regarding “index constitution methodologies.”
This regulatory interest mirrors the 2022 SEC probe into index-linked product transparency. If the SEC mandates new reporting standards for index-eligible companies, S&P’s current “conditional” rejection could become a permanent industry standard. For now, the burden remains on firms to demonstrate that their capital structures are resilient enough for index inclusion. As S&P’s criteria evolve, companies seeking index inclusion must navigate an increasingly complex regulatory landscape, balancing the demands of public transparency with the operational needs of high-growth technology and biotech enterprises.
