Largest Companies by Market Cap - Complete Rankings

Eight technology companies fell: Seagate Technology Holdings plc (STX), Sandisk Corporation (SNDK), Western Digital Corp. (WDC), Arm Holdings (ARM), KLA Corporation (KLAC), Lam Research Corp (LRCX), Applied Materials, Inc. (AMAT) and Arista Networks (ANET). STX was the biggest faller, dropping 39 places to rank 110 from rank 71. SNDK fell 31 places to rank 88 from rank 57, while WDC fell 29 places to rank 127 from rank 98. ARM fell 22 places to rank 65 from rank 43, and KLAC fell 20 places to rank 78 from rank 58.

The upward groups included ServiceNow, Inc. (NOW), SAP SE (SAP), International Business Machines Corporation (IBM), Shopify Inc. (SHOP) and Salesforce, Inc. (CRM) in technology, alongside ConocoPhillips (COP), Shell (SHEL) and TotalEnergies SE (TTE) in energy. COP rose 19 places to rank 86 from rank 105. NOW rose 15 places to rank 98 from rank 113, while SAP rose 14 places to rank 50 from rank 64.

Vylor Inc. (VYLR) debuted at rank 323, and Skydance Corporation (SKYD) debuted at rank 394. Other new appearances were at the universe boundary, including Match Group, Inc (MTCH), Range Resources Corp (RRC) and QIAGEN N.V. (QGEN). The most consequential departure was Warner Bros. Discovery, Inc. Series A (WBD), which left after holding rank 212; other departures included Vicor Corp (VICR) and TTM Technologies Inc (TTMI).

The top 10 order was unchanged. The current board is live, so this comparison is with the month-end snapshot at the close of September 2026.