Premarket Losers for Thursday, October 15, 2026
Live pre-market data — updates every 60 seconds. 50 stocks declined in pre-market trading. Biggest decliner: Rocket Lab Corporation Common Stock (RKLB) at -9.14%.
Pre-Market Decliners on Thursday, October 15, 2026
Pre-market losers are stocks experiencing the largest price drops between 4:00 AM and 9:30 AM ET. These moves are often triggered by earnings misses, guidance cuts, analyst downgrades, or negative macro developments. Low pre-market volume can amplify these moves beyond what regular-session trading would produce.
Significant pre-market declines can present either warning signs or buying opportunities depending on the catalyst. Cross-reference with the earnings calendar and individual stock analysis pages for deeper context.
| Ticker | Company | Sector | Price | % Change | RVOL |
|---|---|---|---|---|---|
| RKLB | Rocket Lab Corporation Common Stock | Industrials | $53.77 | -9.14% | 1.8× |
| CRWV | CoreWeave, Inc. Class A Common Stock | Technology | $61.07 | -7.16% | 3.0× |
| SKHY | SK hynix Inc. American Depositary Shares | Technology | $137.86 | -6.57% | 3.4× |
| ASX | ASE Technology Holding Co., Ltd. | Materials | $42.00 | -5.26% | 0.6× |
| LSCC | Lattice Semiconductor Corp | Technology | $109.00 | -5.22% | 0.0× |
| VICR | Vicor Corp | Technology | $233.00 | -5.03% | 0.0× |
| FORM | FormFactor Inc. | Technology | $114.00 | -4.77% | 0.1× |
| BE | Bloom Energy Corporation | Technology | $228.01 | -4.73% | 0.5× |
| STX | Seagate Technology Holdings PLC Ordinary Shares (Ireland) | Technology | $682.00 | -4.42% | 0.2× |
| SNDK | Sandisk Corporation Common Stock | Technology | $1342.02 | -4.37% | 0.6× |
| WDC | Western Digital Corp. | Technology | $349.00 | -4.15% | 0.4× |
| HUT | Hut 8 Corp. Common Stock | Financial Services | $71.80 | -4.10% | 0.1× |
| NTAP | NetApp, Inc | Technology | $213.20 | -4.05% | 0.0× |
| MKSI | MKS Inc. Common Stock | Technology | $225.01 | -4.05% | 0.2× |
| ENTG | Entegris Inc | Technology | $147.00 | -3.97% | 0.1× |
| NBIS | Nebius Group N.V. | Technology | $178.75 | -3.90% | 1.6× |
| TTMI | TTM Technologies Inc | Technology | $99.30 | -3.88% | 0.2× |
| DELL | Dell Technologies Inc. | Technology | $488.70 | -3.79% | 0.2× |
| FRO | Frontline Plc | Energy | $54.16 | -3.75% | 0.6× |
| AAOI | Applied Optoelectronics, Inc. | Technology | $83.00 | -3.73% | 0.7× |
| PL | Planet Labs PBC | Technology | $13.61 | -3.71% | 0.3× |
| MU | Micron Technology, Inc. | Technology | $880.41 | -3.69% | 0.6× |
| STM | STMicroelectronics N.V. | Technology | $45.21 | -3.60% | 0.6× |
| SMTC | Semtech Corp | Technology | $154.50 | -3.59% | 0.2× |
| BMNR | BitMine Immersion Technologies, Inc. | Financial Services | $21.46 | -3.55% | 0.5× |
| HPE | Hewlett Packard Enterprise Company | Technology | $60.90 | -3.50% | 0.2× |
| RMBS | Rambus Inc | Technology | $88.89 | -3.50% | 0.1× |
| LITE | Lumentum Holdings Inc. Common Stock | Technology | $865.00 | -3.50% | 0.3× |
| COHR | Coherent Corp. | Technology | $254.14 | -3.49% | 0.3× |
| GLW | Corning Incorporated | Industrials | $136.00 | -3.47% | 0.3× |
| AEIS | Advanced Energy Industries Inc | Technology | $251.72 | -3.47% | 0.0× |
| VRT | Vertiv Holdings Co Class A Common Stock | Technology | $215.15 | -3.45% | 0.4× |
| ALAB | Astera Labs, Inc. Common Stock | Technology | $289.94 | -3.44% | 0.1× |
| CBRS | Cerebras Systems Inc. Class A Common Stock | Technology | $136.68 | -3.39% | 0.3× |
| CRDO | Credo Technology Group Holding Ltd Ordinary Shares | Technology | $173.17 | -3.38% | 0.4× |
| CRCL | Circle Internet Group, Inc. | Financial Services | $76.88 | -3.36% | 0.7× |
| BAX | Baxter International Inc. | Healthcare | $24.01 | -3.18% | 0.0× |
| RIOT | Riot Platforms, Inc. Common Stock | Financial Services | $14.62 | -3.18% | 0.3× |
| RBRK | Rubrik, Inc. | Technology | $110.28 | -3.18% | 0.2× |
| HBM | Hudbay Minerals Inc. | Materials | $23.47 | -3.18% | 0.1× |
| ARM | Arm Holdings plc American Depositary Shares | Technology | $230.50 | -3.16% | 0.4× |
| FPS | Forgent Power Solutions, Inc. | Technology | $31.67 | -3.15% | 0.2× |
| SMCI | Super Micro Computer, Inc. Common Stock | Technology | $34.66 | -3.13% | 0.4× |
| ONTO | Onto Innovation Inc. | Technology | $233.86 | -3.13% | 0.1× |
| INTC | Intel Corp | Technology | $95.07 | -3.11% | 0.7× |
| AMKR | Amkor Technology Inc | Technology | $43.43 | -3.10% | 0.5× |
| CLSK | CLEANSPARK INC | Financial Services | $8.95 | -2.98% | 0.4× |
| SNOW | Snowflake Inc. | Technology | $325.15 | -2.96% | 0.2× |
| CLS | Celestica, Inc. | Technology | $313.99 | -2.89% | 0.1× |
| ZS | Zscaler, Inc. Common Stock | Technology | $214.50 | -2.85% | 0.1× |