The Supply Turn: Record IPO Issuance Meets a Buyback Bid in Retreat

For nearly two decades, the defining feature of the U.S. equity market was scarcity. S&P 500 buybacks alone erased nearly $12 trillion of shares from public hands.{cite:4880118daf7f} That slow drain is now reversing, and the speed of the reversal is the market-structure story of 2026.

U.S. issuers raised $251 billion in IPOs through June 26, surpassing the prior midyear record set during the 2021 listing boom, according to Renaissance Capital data reported by Reuters.{cite:4b80058f2c8c} Two deals drove roughly 68% of that total: SpaceX’s $86.2 billion IPO on June 12 and Alphabet’s $85 billion equity raise to fund its AI buildout.{cite:4b80058f2c8c} Together, those two transactions exceeded all U.S. IPO proceeds from 2023, 2024, and 2025 combined.{cite:4b80058f2c8c}

Strip out SpaceX and the market is still running at more than double last year’s pace. Dealogic counted 194 U.S. IPOs worth $155.8 billion through July 2; excluding SpaceX, the remaining $69.9 billion is more than double the $31.6 billion printed year-to-date in 2025.{cite:402af432db4e} Eleven separate deals cleared the $1 billion threshold in the first half, and 2026 debutants traded up a weighted-average 16% from their offer prices.{cite:4b80058f2c8c} This is not a one-deal market wearing a record label.

The $28 billion test: SK Hynix opens the second half

The first major deal of H2 is already live. On July 6, South Korean memory-chip giant SK Hynix launched a Nasdaq ADR offering of 177.9 million shares priced at $158.14, targeting roughly $28.07 billion in proceeds — the largest-ever U.S. listing by a foreign company.{cite:f82258f014bc} The deal drew indications of interest for up to $7 billion from major investors including Baillie Gifford and Coatue Management, and proceeds are earmarked for chip-factory construction in South Korea and equipment purchases as HBM demand surges.{cite:f82258f014bc}

By any historical standard, absorbing a $28 billion deal in the first full trading week of July is a stress test. Renaissance Capital’s calendar shows SK Hynix (ticker SKHY) as the dominant entry for the week of July 6, with lead managers BofA and Citi.{cite:c800300d348d} The pricing sits at a fixed $158.14 — no range — which signals either extraordinary confidence in bookbuild demand or a deliberate effort to anchor a clean reference price, the way SpaceX did at $135.

The $1.5 trillion trajectory

JPMorgan estimates that IPOs, secondary offerings, and other share sales are poised to add roughly $1.5 trillion of net new equity to the U.S. market over the next two years — even after accounting for buybacks.{cite:4880118daf7f} If realized, it would mark the strongest period of net equity supply in modern market history. The forecast embeds a clear assumption: that the buyback bid, which has been the marginal buyer of U.S. equities for years, continues to thin while issuance accelerates.

There is early evidence that the assumption is holding. Buyback announcements across more than 11,000 global firms tracked by Wall Street Horizon are near their weakest nominal level since before the pandemic.{cite:1189eb3e5a62} Bank of America reports that aggregate S&P 500 buybacks as a percentage of market cap fell to their lowest level since late 2023, with technology — the sector that historically dominates repurchase activity — driving the decline. JPMorgan Asset Management’s David Kelly notes that tech hyperscaler repurchase activity is down 64% year-over-year, even as absolute buyback value ticked to a nominal record in 2026.{cite:1189eb3e5a62}

The mechanism is straightforward: AI capex is winning the capital-allocation battle. Operating cash flow that once funded buybacks is being redirected into data centers, silicon, and infrastructure. Alphabet’s $85 billion equity raise is the clearest example — a company that would once have used debt and free cash flow to shrink its share count instead tapped public markets to fund expansion.{cite:4b80058f2c8c} S&P 500 non-GAAP EPS is still projected to grow more than 20% in 2026, per FactSet, but tech free cash flow has declined, particularly among the hyperscalers.{cite:1189eb3e5a62}

The pipeline behind the pipeline

The visible calendar is large, but the confidential pipeline is larger. Anthropic has confidentially filed for an IPO, and OpenAI has done the same, though OpenAI may delay its offering until 2027.{cite:402af432db4e} ECM bankers expect Anthropic to come first, potentially in September or October, with one banker quoted by Dealogic noting: “I think Anthropic comes first, and then OpenAI. Look just what has happened in the last month: Google came and raised $50 billion in roughly a two-day market.”{cite:402af432db4e}

That confidence is not universal. The same Dealogic report quotes a U.S. investor warning that both companies lack the “idiosyncratic features that the SpaceX setup had” and that having OpenAI and Anthropic list in consecutive months “sounds terrible for the broader market” if sentiment shifts.{cite:402af432db4e} The concern is structural: both are premium LLM providers seeking public valuations at a time when skepticism about large language model economics is growing, even from voices previously counted among the technology’s strongest supporters.{cite:402af432db4e}

Momentum since SpaceX has been respectable. Nineteen IPOs priced on U.S. exchanges after the SpaceX deal, raising a cumulative $6.9 billion, including Bending Spoons ($1.68 billion) and Doncasters Group ($1 billion).{cite:402af432db4e} But those are mid-cap deals. The real test comes when the next $20 billion-plus AI-era listing prices.

The SpaceX lockup clock

SpaceX’s aftermarket performance is the leading indicator for the entire AI-IPO cohort, and the next few weeks carry concentrated risk. SPCX priced at $135 on June 12, opened at $150, and closed its first session at $161 — a 19% first-day gain.{cite:4b80058f2c8c} The follow-through was bumpier: across a four-session stretch in late June, SpaceX shed roughly $400 billion in market capitalization, including a single-day decline of about 16%.{cite:4b80058f2c8c}

Unlike a conventional 180-day lockup, SpaceX built a tiered, rolling release schedule designed to meter insider selling rather than block it.{cite:ebe0bb309edf} The first tranche of lockup expirations falls in late July or early August, concurrent with the company’s first reported quarterly earnings as a public company.{cite:402af432db4e} A banker quoted by Dealogic was blunt: “If SpaceX starts to trade down that could close the door for other AI issuers.”{cite:402af432db4e}

This is the single highest-conviction risk on the IPO calendar. A SpaceX break below its $135 offer price coinciding with lockup releases would not only pressure SPCX holders — it would re-rate the implied valuation ceiling for every AI infrastructure name in the pipeline, including Anthropic and OpenAI.

The European counterpoint

The U.S. issuance boom has no mirror in Europe. Dealogic’s IPO Health Index for EMEA remains near its post-2021 nadir, even as the Americas index approaches post-2021 highs.{cite:402af432db4e} The most high-profile European IPO expected before the summer break — Franco-German tank maker KNDS — was postponed after investors demanded a discount of at least 30% to peers, well below the EUR 12.5 billion valuation the family shareholders sought.{cite:402af432db4e}

The structural diagnosis from ECM bankers is that Europe relies on a smaller, more selective investor base — mutual funds and hedge funds with pockets of domestic demand — and lacks the retail and institutional FOMO that powered SpaceX.{cite:402af432db4e} Listing-reform efforts may speed preparation, but deeper changes to the European investor base, including pension fund and retail participation, are not imminent.{cite:402af432db4e}

Where the numbers put the odds

Putting explicit probabilities on the trajectory:

Base case (~55%): The window stays open through Q3. SK Hynix prices successfully, Anthropic files and prices in the September-October window, and the market absorbs $300–350 billion of full-year IPO supply. SpaceX lockup releases produce volatility but not a sustained break below $135. Buybacks continue to thin but do not collapse. Net supply is absorbed by index-tracking demand and AI-themed retail flows.

Bear case (~30%): SpaceX trades below its offer price on lockup-driven selling, triggering a re-rating of the AI-IPO cohort. Anthropic delays. The $1.5 trillion two-year projection proves optimistic as the second half cools sharply. Morgan Stanley’s warning about Q3 front-loading ahead of midterm-election volatility proves correct — supply compresses into July-August, then stalls.{cite:4b80058f2c8c}

Tail case (~15%): A broader sentiment reset — an AI capex disappointment, a credit event, or an inflation surprise — closes the new-issue window entirely. The 2026 IPO class, valued at roughly 10 times the 2022 average, re-rates fast.{cite:4b80058f2c8c} The supply turn becomes a supply shock.

What to watch next

The base rate from prior cycles is that new-issue windows close faster than they open. The 2021 boom ended not with a dramatic event but with a quiet deterioration in aftermarket performance that made issuers pull deals. The 2026 cycle has a structural difference — AI capex demand is creating genuine primary-capital need, not just exit liquidity — but the concentrated supply, the thinning buyback bid, and the SpaceX lockup clock mean the margin for error is narrower than the headline numbers suggest.

Sources: Bloomberg Law, Dealogic/ION Analytics, Renaissance Capital via Reuters/Yahoo Finance, JPMorgan, Interactive Brokers/Wall Street Horizon, CNBC, Motley Fool, Morningstar, Reuters, Fortune, Renaissance Capital IPO Calendar, IPOScoop.