Stocks making the biggest moves premarket: IonQ, Maplebear, Worthington & more

Worthington Enterprises rose about 16% premarket after first-quarter adjusted earnings and revenue beat estimates and management highlighted rapidly growing data-center liquid-cooling tank demand. IonQ gained 12% after testing a real-time quantum error decoder, lifting Rigetti Computing, D-Wave Quantum and Infleqtion by more than 5.5%. KB Home fell over 1% on below-consensus delivery and margin expectations, while Six Flags rose 1% on reports that Jana Partners is pushing for a potential sale and Instacart gained more than 3% on a Meta AI-agent partnership.

Analysis

WOR has a credible route to data-center capex exposure that is less crowded than the obvious GPU, power and cooling names. The key question is whether engineered-vessel demand becomes a repeatable, high-margin specification business rather than a small-project revenue contribution; confirmation should appear in backlog, mix and segment-margin commentary over the next two earnings cycles. If liquid cooling adoption broadens from hyperscale AI clusters into enterprise retrofits, qualified pressure-vessel capacity could become a bottleneck, supporting both pricing and utilization.

IONQ's move will likely transmit to the quantum basket immediately, but the investable distinction is commercialization: error-correction progress matters only if it improves algorithmic fidelity at a cost and scale that customers will pay for. RGTI, QBTS and INFQ can rally on category beta over days, yet their financing requirements make them more vulnerable if the risk-on impulse fades; the likely medium-term dispersion is between companies demonstrating contracted revenue and those funding R&D through dilution. Treat the announcement as a technical validation event, not evidence of near-term earnings power.

KBH's margin signal is more important than a modest delivery miss because it implies incentives, product mix or land-cost pressure may be outrunning the benefit from easier mortgage-rate comparisons. Watch whether DHI, LEN and PHM revise gross-margin or incentive commentary over the next 1-3 months; confirmation would pressure the group's premium valuation and favor land-light or resale-exposed housing plays. CART's AI-agent distribution is strategically useful for retention and discovery, but absent disclosed order conversion, advertising yield or basket-size uplift, it is unlikely to alter estimates.

The contrarian read is that WOR may be under-owned as an AI-infrastructure derivative while quantum names are over-owned as a narrative proxy. A sustained WOR rerating requires evidence that data-center sales are material enough to affect consolidated earnings; otherwise the initial move can mean-revert once the market focuses on its legacy industrial cycle.

Key Decisions for Investors

• Initiate a 1-3 month long WOR position on confirmation that engineered-tank backlog or data-center revenue is disclosed as material; size modestly before that confirmation. Target a rerating versus industrial peers if segment margins expand, and exit if next-quarter commentary characterizes liquid cooling as immaterial or if order growth fails to translate into backlog.
• Use a relative-value expression rather than broad quantum exposure: long IONQ / short RGTI or QBTS over 1-3 months, only after the opening volatility settles. The thesis is that technical credibility and balance-sheet differentiation should drive dispersion; cover if IONQ fails to provide measurable customer, bookings or hardware-performance follow-through, or if a peer announces a comparable commercial milestone.
• Maintain an underweight in KBH versus LEN or DHI through the next housing-data and earnings cycle. The trade works if incentives and gross-margin pressure spread across entry-level builders; stop out on a clear improvement in KBH's margin guide or a meaningful decline in cancellation rates and incentives.
• Do not chase CART on AI-partnership headlines. Set an alert for disclosed conversion, incremental orders, ad monetization or customer-acquisition-cost improvement; absent those metrics, the partnership is distribution optionality rather than an earnings catalyst.