Samsara and UiPath Lead Earnings-Driven Pre-Market Swings as Lululemon and Guidewire Tumble

A wave of quarterly earnings reports drove sharp pre-market moves across U.S. equities on September 4, 2026, with winners and losers split largely along the lines of guidance strength. Samsara led gainers, surging 14.3% to $44.30 after a strong beat-and-raise second-quarter report that showed adjusted EPS of $0.20 on revenue of $508.4 million, up 30% year over year, with management lifting its full-year fiscal 2027 outlook. UiPath rose 13% after meeting second-quarter earnings expectations with revenue of $410.2 million, a 13% year-over-year gain, and issuing an upbeat full-year forecast.

On the downside, Lululemon Athletica was the session's most punishing story, falling 20% to $97.42 after reporting disappointing second-quarter sales and cutting its full-year revenue guidance, citing softening retail traffic across the Americas. Guidewire Software dropped 14.7% to $172.99 despite strong fourth-quarter top-line results, as weak first-quarter revenue guidance of $372 million to $378 million alarmed investors. Oxford Industries, parent of Tommy Bahama, fell 16.7% to $30.50 after issuing severe third-quarter loss guidance and slashing full-year sales targets due to direct-to-consumer weakness. Asana slipped 12% after soft near-term third-quarter profitability guidance overshadowed a modest second-quarter earnings beat.

Several other names posted meaningful gains. DocuSign climbed more than 7% in pre-market trading after topping second-quarter estimates with revenue of $875.7 million, up 9% year over year, and raising full-year targets on accelerated adoption of its IAM platform. Planet Labs jumped 5% after reporting a surprise second-quarter profit of $0.02 EPS on revenue of $116.1 million, up 58% year over year, driven by expanding defense and intelligence contracts. Smith and Wesson Brands leaped 11.2% to $13.65 on first-quarter net sales of $112.6 million, up 32% year over year, with adjusted EPS of $0.06 easily beating consensus. Zscaler traded modestly higher after a fourth-quarter beat-and-raise showing revenue of $898.2 million, up 21% year over year.