Premarket Losers for Tuesday, October 13, 2026
Live pre-market data — updates every 60 seconds. 50 stocks declined in pre-market trading. Biggest decliner: SK hynix Inc. American Depositary Shares (SKHY) at -4.49%.
Pre-Market Decliners on Tuesday, October 13, 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 |
|---|---|---|---|---|---|
| SKHY | SK hynix Inc. American Depositary Shares | Technology | $154.95 | -4.49% | 1.2× |
| WDC | Western Digital Corp. | Technology | $373.05 | -3.59% | 0.4× |
| STX | Seagate Technology Holdings PLC Ordinary Shares (Ireland) | Technology | $726.88 | -3.50% | 0.2× |
| ASTS | AST SpaceMobile, Inc. Class A Common Stock | Comm Serv | $49.67 | -3.48% | 0.7× |
| RDDT | Reddit, Inc. | Technology | $155.19 | -2.97% | 0.1× |
| ASX | ASE Technology Holding Co., Ltd. | Materials | $46.30 | -2.59% | 0.2× |
| SNDK | Sandisk Corporation Common Stock | Technology | $1449.00 | -2.58% | 0.3× |
| MU | Micron Technology, Inc. | Technology | $966.25 | -2.30% | 0.3× |
| SITM | SiTime Corporation Common Stock | Technology | $558.00 | -2.12% | 0.0× |
| DOCN | DigitalOcean Holdings, Inc. | Technology | $128.83 | -1.96% | 0.0× |
| SNPS | Synopsys Inc | Technology | $493.00 | -1.89% | 0.0× |
| LSCC | Lattice Semiconductor Corp | Technology | $120.55 | -1.86% | 0.0× |
| MTSI | MACOM Technology Solutions Holdings, Inc | Technology | $300.72 | -1.84% | 0.0× |
| INCY | Incyte Genomics Inc | Healthcare | $109.32 | -1.83% | 0.0× |
| ARM | Arm Holdings plc American Depositary Shares | Technology | $250.67 | -1.79% | 0.3× |
| RMBS | Rambus Inc | Technology | $99.24 | -1.78% | 0.0× |
| MRVL | Marvell Technology, Inc. Common Stock | Technology | $261.25 | -1.73% | 0.3× |
| VICR | Vicor Corp | Technology | $255.00 | -1.70% | 0.1× |
| SMCI | Super Micro Computer, Inc. Common Stock | Technology | $39.31 | -1.68% | 0.2× |
| ALAB | Astera Labs, Inc. Common Stock | Technology | $318.94 | -1.60% | 0.0× |
| MKSI | MKS Inc. Common Stock | Technology | $245.95 | -1.58% | 0.0× |
| AEIS | Advanced Energy Industries Inc | Technology | $276.53 | -1.51% | 0.0× |
| TLN | Talen Energy Corporation Common Stock | Utilities | $374.05 | -1.51% | 0.0× |
| AMAT | Applied Materials Inc | Technology | $490.09 | -1.50% | 0.1× |
| ZS | Zscaler, Inc. Common Stock | Technology | $222.42 | -1.49% | 0.0× |
| STM | STMicroelectronics N.V. | Technology | $49.74 | -1.47% | 0.2× |
| CRDO | Credo Technology Group Holding Ltd Ordinary Shares | Technology | $198.00 | -1.41% | 0.1× |
| P | Everpure, Inc. | Technology | $153.20 | -1.36% | 0.0× |
| FLEX | Flex Ltd. Ordinary Shares | Technology | $115.67 | -1.34% | 0.0× |
| AMKR | Amkor Technology Inc | Technology | $47.47 | -1.32% | 0.2× |
| ONTO | Onto Innovation Inc. | Technology | $270.13 | -1.32% | 0.0× |
| STRL | Sterling Infrastructure, Inc. Common Stock | Industrials | $494.76 | -1.28% | 0.1× |
| TER | Teradyne, Inc. Common Stock | Technology | $379.00 | -1.26% | 0.1× |
| BABA | Alibaba Group Holding Limited American Depositary Shares, each represents eight Ordinary Shares | Cons Cyclical | $109.39 | -1.25% | 0.3× |
| GIS | General Mills, Inc. | Cons Defensive | $32.29 | -1.25% | 0.0× |
| RBRK | Rubrik, Inc. | Technology | $118.51 | -1.25% | 0.0× |
| BE | Bloom Energy Corporation | Technology | $259.05 | -1.23% | 0.1× |
| NBIS | Nebius Group N.V. | Technology | $207.51 | -1.22% | 0.3× |
| ENTG | Entegris Inc | Technology | $158.09 | -1.20% | 0.0× |
| BHP | BHP Group Limited American Depositary Shares (Each representing two Ordinary Shares) | Materials | $85.68 | -1.20% | 0.5× |
| CRWV | CoreWeave, Inc. Class A Common Stock | Technology | $79.32 | -1.17% | 0.2× |
| TTMI | TTM Technologies Inc | Technology | $109.04 | -1.17% | 0.1× |
| TSEM | Tower Semiconductor Ltd | Technology | $213.99 | -1.16% | 0.1× |
| RKLB | Rocket Lab Corporation Common Stock | Industrials | $64.96 | -1.14% | 0.3× |
| MCHP | Microchip Technology Inc | Technology | $72.99 | -1.14% | 0.0× |
| DELL | Dell Technologies Inc. | Technology | $570.21 | -1.14% | 0.1× |
| NTAP | NetApp, Inc | Technology | $236.48 | -1.13% | 0.0× |
| ANET | Arista Networks | Technology | $208.50 | -1.13% | 0.1× |
| ON | ON Semiconductor Corp | Technology | $75.17 | -1.09% | 0.0× |
| TXN | Texas Instruments Incorporated | Technology | $278.67 | -1.09% | 0.0× |