Stock Markets June 17, 2026 08:39 AM

Premarket Movers: UniQure Rockets on FDA Agreement; Snap, Leidos Under Pressure

U.S. futures largely unchanged as investors await a key Fed decision and parse corporate developments across biotech, semiconductors, shipping and defense

By Avery Klein
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U.S. stock futures were mostly flat in early trading as market participants prepared for a pivotal Federal Reserve interest rate announcement and tracked reports about a preliminary Middle East peace agreement. Several individual stocks posted sharp premarket moves, with UniQure surging after favorable FDA feedback on clinical data for a Huntington’s disease filing, and Aehr Test Systems rising on a follow-on production order. Conversely, Snap and Leidos fell after product skepticism and analyst downgrades weighed on their shares.

Premarket Movers: UniQure Rockets on FDA Agreement; Snap, Leidos Under Pressure
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Key Points

  • U.S. futures were broadly steady as investors awaited a critical Federal Reserve interest rate decision and monitored reports related to a preliminary Middle East peace agreement - sectors affected include macro-sensitive markets and risk assets.
  • UniQure surged 67.5% after the FDA agreed that three-year data from its Phase I/II AMT-130 study could be used as the primary basis for a Biologics License Application seeking accelerated approval for Huntington’s disease - impact concentrated in biotech and healthcare.
  • Aehr Test Systems jumped 11% on a follow-on production order for a fully automated FOX-XP wafer-level burn-in system, while Snap and Leidos fell on product skepticism and analyst downgrades respectively - relevant to semiconductors, technology hardware and defense contracting.

U.S. stock futures traded with little net change on Wednesday as investors positioned themselves ahead of a key Federal Reserve interest rate decision and followed coverage of a preliminary Middle East peace agreement. By 08:40 ET (012:40 GMT), the Dow futures contract fell 0.1%, S&P 500 futures gained 0.1%, and Nasdaq 100 futures were up 0.5%.

In premarket activity, healthcare and technology names drew notable attention, while market participants also reacted to analyst moves and merger developments announced overnight. The most pronounced premarket swings were concentrated among a handful of companies spanning biotech, semiconductor equipment, shipping and defense contracting.

UniQure was the day’s most dramatic mover. The gene therapy developer’s stock surged 67.5% after the company said the U.S. Food and Drug Administration had agreed that three-year data from its Phase I/II study of AMT-130 could serve as the primary basis for a Biologics License Application seeking accelerated approval for Huntington’s disease. The company framed the FDA’s agreement as material to the potential regulatory pathway for its therapy.

Aehr Test Systems also posted a strong premarket gain, jumping 11% following an announcement that it had secured a follow-on production order for a fully automated FOX-XP wafer-level burn-in system from a major silicon photonics customer. The maker of semiconductor test equipment said the system is expected to be delivered within the next six months.

Snap remained under pressure after plunging 9.6% in the prior session. The decline followed the launch of the company’s standalone augmented reality glasses, called "SPECS," which investors appeared skeptical about in terms of near-term commercial prospects.

Genco Shipping & Trading rose 8% after Diana Shipping increased its acquisition proposal to $27.34 per share, comprised of cash and stock. Diana characterized the revised offer as a substantial premium to Genco’s share price before its initial proposal.

T1 Energy gained 1.9% after Bernstein SocGen Group initiated coverage with a Market Perform rating and a $9 price target, citing growth opportunities alongside ongoing legal risks for the solar and battery storage company.

Leidos Holdings slipped 1.3% after BofA Securities downgraded the defense and information technology contractor to Neutral from Buy and cut its price target to $125 from $200.


The premarket action underscored how a mix of regulatory updates, equipment orders, corporate proposals and analyst decisions can drive outsized moves in single stocks even as broad market futures remain muted ahead of major macroeconomic catalysts.

Risks

  • An upcoming Federal Reserve interest rate decision could shift market sentiment and volatility across equity sectors, particularly for interest-rate sensitive stocks - macro and financial sectors are exposed.
  • Details and outcomes tied to any preliminary Middle East peace agreement reports remain evolving and could affect risk appetite; market reactions are uncertain - impacts could be broad-based across equities and commodities.
  • Regulatory and commercial uncertainties persist for companies highlighted in premarket moves: UniQure’s potential BLA pathway is contingent on regulatory review outcomes, and T1 Energy faces ongoing legal risks noted by its new analyst coverage - biotech, renewable energy and legal-risk-exposed companies are affected.

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