Stocks making the biggest moves after hours: Zscaler, Insulet, Box and more
After-hours movers: Box fell 2% after full-year adjusted EPS guidance of $1.56 vs $1.63 expected, though Q1 adjusted EPS was 37 cents on $306M revenue vs 36 cents and $304M. Zscaler dropped 16% on current-quarter revenue guidance of $875–$878M vs $879M, despite fiscal Q3 EPS of $1.08 and $850M revenue. Semtech rose 8% on Q1 and upbeat guidance; Insulet fell ~9% on a voluntary pod correction tied to insulin under-delivery risk.
How this was made
The 30-second read
Why it matters
Guidance misses (BOX, ZS) and a manufacturing/quality correction (PODD) drove the largest declines, while Semtech’s beat-and-raise and Modine’s earnings strength supported gains. Cloud security peers moved lower in sympathy with Zscaler’s guidance reset.
Market read
Traders should focus on guidance deltas and quality/regulatory overhangs, plus read-across effects within cloud security.
What to watch
For PODD, the correction is 'voluntary' and limited to specific lots; for ZS/PANW/CRWD, sympathy moves may fade if next-day commentary clarifies pipeline or bookings trends.
Background
The piece summarizes the largest after-hours movers, focusing on guidance versus consensus, earnings beats, and a medical device correction announcement.
Ticker impact
Box guided full-year adjusted EPS to $1.56 vs $1.63 expected, while Q1 adjusted EPS and revenue beat estimates.
Choppy/soft near-term as investors weigh guidance reset versus beat.
The article explicitly cites a full-year adjusted EPS guidance miss as the driver of a ~2% after-hours decline, offset partially by Q1 beats.
Zscaler shares fell 16% after current-quarter revenue guidance ($875M–$878M) missed the $879M consensus.
Further downside risk until investors digest whether the miss is temporary or demand-related.
The article directly links the 16% tumble to revenue guidance below consensus, even though EPS and revenue for the prior quarter beat.
Palo Alto Networks fell about 2% in sympathy with Zscaler’s after-hours guidance-driven selloff.
Near-term pressure may persist while the market reprices cloud security growth expectations.
The move is described as 'in sympathy' with Zscaler, implying correlation rather than PANW-reported news.
CrowdStrike shed about 2% in sympathy with Zscaler’s after-hours guidance miss.
Mean-reversion possible if broader cloud security stabilizes, but risk remains elevated while read-across persists.
The article attributes the decline to sympathy with Zscaler, not to CRWD guidance or earnings.
Semtech popped 8% after beating Q1 adjusted earnings and revenue and issuing current-quarter guidance above expectations.
Momentum bid likely to continue into the next session if guidance holds up.
The article explicitly states both results and guidance exceeded estimates alongside an 8% after-hours gain.
Insulet shares dropped ~9% after announcing a voluntary medical device correction due to a manufacturing issue that could cause insulin under-delivery.
Further volatility likely until scope, affected lots, and remediation timeline are clearer.
The article ties the ~9% drop directly to a correction linked to potential under-delivery to patients.
Modine added ~1% after reporting fiscal Q4 earnings and revenue that beat estimates, and it previously announced a $4B data center cooling deal.
Modest upside bias as investors anchor on cooling demand and margin outlook.
The article cites Q4 beat and references the $4B deal as a recent catalyst, but the after-hours move is only +1%.
Market effects
Cloud security names show correlation risk: Zscaler’s guidance miss pressured peers (PANW, CRWD) despite no peer-specific news.
Primarily US large-cap after-hours repricing; no explicit regional macro driver cited.
Semiconductor/medical device-specific guidance and quality actions can affect broader supply-chain sentiment, but article provides no cross-border details.
Counterpoint
Some downside in BOX/ZS may be overdone if investors treat guidance misses as timing rather than structural demand deterioration.
Key entities
- companyBox
Cloud-based content management provider with a full-year adjusted EPS guidance miss but Q1 beat.
- companyZscaler
Cloud security company whose current-quarter revenue guidance missed consensus, triggering a sharp selloff.
- companySemtech
Semiconductor company that beat Q1 estimates and guided above expectations.
- companyInsulet
Medical device maker announcing a voluntary correction tied to potential insulin under-delivery.
- companyModine Manufacturing
Manufacturing company reporting a fiscal Q4 earnings/revenue beat and benefiting from a recent $4B data center cooling deal.
