Three companies completed IPOs this past week, a short four-day trading week due to the Juneteenth holiday. Drug developer Kardigan was the clear winner with a 37.5% first-day pop, the second biotech winner in a row following Parabilis in the prior week, reinforcing the industry's place among key themes in the 2026 IPO market:
- AI & AI Infrastructure (chips, power, industrials)
- Aerospace & defense
- Biotech
While the SpaceX (SPCX) IPO may be in the rearview mirror, its trading still dominated financial headlines this week. After a "Goldilocks" first-day pop of 19%, SpaceX continued its ascent and reached $201.80 by Tuesday's close (+49% from offer), before sinking to $185.00 (+37%) by the end of the trading week. With a relatively low float of about 5% of total shares, index fund buying on the horizon, and the first lock-up release still two months away, it's safe to expect more volatility for SpaceX in the weeks ahead.
Cardiovascular disease biotech Kardigan (KARD) priced at the high end of the range to raise $400 million at a market cap of $1.7 billion, a large haul by historical norms. The stock popped 37.5% on its first day. Backed by HRTG Partners, Arch Venture, and Perceptive Advisors, Kardigan is led by former executives from MyoKardia, a 2015 IPO that was acquired by Bristol-Myers in 2020 for $13 billion. Kardigan is developing a drug candidate in-licensed from BMS/MyoKardia called danicamtiv, as an oral cardiac atrial and ventricular myosin activator for the treatment of dilated cardiomyopathy (DCM) caused by certain genetic variants. The company expects top-line data for its ongoing Phase 2b trial in the first half of 2027.
North Carolina-based community bank First Carolina Financial Services (FCBM) raised $69 million by pricing below the range at $12.50. The stock inched up 1% in its debut. With $3.5 billion in assets, First Carolina highlights the regional economic strength of the Carolinas, as well as investments in technology, including the acquisition of national higher education-focused payments platform BM Tech. While its net margin and efficiency ratio have worsened during the past several years, the First Carolina attributes this to investments that position it for growth.
Pre-revenue nuclear reactor developer Deep Fission (FISN) had originally planned to raise $150 million, but slashed its proposed share offering and range, ultimately raising $40 million at a market cap of about $1 billion. Existing shareholders indicated on about one-quarter of the deal. Deep Fission is exploring small modular nuclear reactors (SMRs) deployed in deep underground shafts around one mile below the Earth's surface, using pressurized water reactor (PWR) technology. The stock traded off 9.0% in its debut. Poor post-IPO trading of SMR developer X-Energy (XE), which listed in April, may have cooled demand for the deal.
In addition to the traditional IPOs, four SPACs went public this week, raising a combined $800 million.
| 7 IPOs During the Week of June 15th, 2026 | |||||
|---|---|---|---|---|---|
| Issuer Business | Deal Size | Market Cap at IPO | Price vs. Midpoint | First Day Return | Return at 06/18 |
| Kardigan (KARD) | $400M | $1,737M | 7% | +38% | +38% |
| Phase 2b/3 biotech developing in-licensed therapies for cardiovascular diseases. | |||||
| Cantor Equity VII (CAES) | $250M | $319M | 0% | +1% | +1% |
| Sixteenth blank check company formed by Cantor Fitzgerald. | |||||
| First Carolina Financial (FCBM) | $69M | $378M | -17% | +1% | +1% |
| Community bank with branches in North and South Carolina, Georgia, and Virginia. | |||||
| Yorkville International (YICCU) | $200M | $353M | 0% | +0% | +1% |
| Blank check company targeting businesses in Latin America, including Venezuela. | |||||
| Texas Ventures Acq. IV (TVIVU) | $150M | $200M | 0% | +0% | +0% |
| Blank check company backed by Texas Ventures targeting industrial tech. | |||||
| Wilco 63 (WLCOU) | $200M | $250M | 0% | -1% | -1% |
| Blank check company targeting AI, automation, and robotics. | |||||
| Deep Fission (FISN) | $40M | $1,001M | -36% | -9% | -9% |
| Develops small modular nuclear reactors deployed in deep underground shafts. | |||||
Two sizable issuers joined the pipeline, data center operator Csquare (CSQR) and nuclear fuel and reactor firm Standard Nuclear (STDN). They were joined by several SPACs.
| 7 Filings During the Week of June 15th, 2026 | |||
|---|---|---|---|
| Issuer Business | Deal Size | Sector | Lead Underwriter |
| Standard Nuclear (STDN) | $100M | Industrials | BofA |
| Manufactures advanced nuclear fuel for small modular reactors across the US. | |||
| Albatross Acquisition (ATAC.U) | $100M | SPAC | Polaris |
| Blank check company targeting large underpenetrated markets. | |||
| Csquare (CSQR) | $650M | Technology | Morgan Stanley |
| Owns and operates 64 data centers across the US and UK, and provides colocation services. | |||
| Market Technology Acq. (MTAKU) | $200M | SPAC | BTIG |
| Blank check company targeting US equities and options clearing infrastructure. | |||
| OceanLight Acquisition (OCLT.U) | $100M | SPAC | Polaris |
| Blank check company targeting large underpenetrated markets. | |||
| Leader's Advantage Acq. (LEDRU) | $150M | SPAC | Clear Street |
| Blank check company targeting chemical and healthcare sectors. | |||
| Osprey Acquisition III (OSPRU) | $261M | SPAC | Cantor Fitz. |
| Blank check company targeting energy and energy infrastructure. | |||
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IPO Market Snapshot
The Renaissance IPO Indices are market cap weighted baskets of newly public companies. As of 6/17/2026, the Renaissance IPO Index was up 26.3% year-to-date, while the S&P 500 was up 9.0%. Renaissance Capital's IPO ETF (NYSE: IPO) tracks the index, and top ETF holdings include Arm Holdings (ARM) and Astera Labs (ALAB). The Renaissance International IPO Index was up 47.4% year-to-date, while the ACWX was up 16.3%. Renaissance Capital’s International IPO ETF (NYSE: IPOS) tracks the index, and top ETF holdings include Kioxia and Galderma.
