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US IPO Weekly Winners & Losers

September 21, 2025

Winners and Losers logo

Two tech unicorns. One lesson: Investors need to see a company’s growth to believe it.

Cybersecurity firm Netskope (Nasdaq: NTSK) priced at the high end of the revised range to raise $908 million and traded up +30% for the week. Meanwhile, ticket resale platform StubHub (NYSE: STUB) priced at the midpoint and plummeted -21% by Friday’s close.

Both names wanted to get credit for ~30% growth next year. But unlike Netskope, StubHub’s growth slowed to a crawl in the past two quarters, while margins faltered. Usually companies go public after an outstanding quarter – StubHub did not, and now investors want to see results before paying up.

We’ve seen some explosive debuts in recent months, fueled in part by the drought of quality VC-backed deals. Clearly some of that hype has faded. Though, in the long run, this sort of pricing discernment is good for investors.

Two PE-backed issuers also listed this week. Oilfield services provider WaterBridge (NYSE: WBI) priced at the high end and delivered a decent +15% gain for the week. E-commerce accelerator Pattern (Nasdaq: PTRN) priced at the midpoint and while it opened below offer, ended up +12%.

No major launches this week, and nothing currently scheduled for the week ahead, though a few more deals could pull the trigger before quarter end. We do expect more companies to join the pipeline as the “wait-and-see” crowd digests the past weeks’ debuts.

Despite a dip on Friday, the Renaissance IPO Index continued its winning streak and ended the week up +2.2% (vs. +1.2% for the S&P 500). Chinese autonomous driving play Pony AI led a tech-heavy list of winners, surging +38.2% on plans to roll out its robotaxi service in Qatar. Delivery platform Instacart traded off -10.5% after some insider selling.

Take care,
Bill Smith
CEO and Founder
Renaissance Capital

Weekly IPO Winners & Losers
Biggest price changes through Sep 19th in the Renaissance IPO Index
Top 5
Pony AI PONY 38.2%
Klaviyo KVYO 13.0%
CoreWeave CRWV 11.5%
Mobileye Global MBLY 9.6%
Rubrik RBRK 7.7%
Bottom 5
Instacart (Maplebear) CART -10.5%
Arm Holdings ARM -5.1%
Kenvue KVUE -3.4%
Lineage LINE -3.4%
Venture Global VG -2.6%
Sectors
Technology 7.5%
Financials 4.3%
Industrials 3.8%
Health Care 2.2%
Consumer Discretionary 1.4%
Energy -2.6%
Consumer Staples -2.7%
Real Estate -3.4%
Renaissance IPO Index Performance

Renaissance IPO ETF (NYSE symbol: IPO) tracks the Renaissance IPO Index

The Renaissance IPO Index returned 2.2% last week vs. 1.2% for the S&P 500.