Largest Companies by Market Cap - Complete Rankings

Technology dominated the change, with 8 companies falling and 5 climbing. The current board is live, so this comparison uses the close of September 2026 as a month-end snapshot.

Seagate Technology Holdings plc (STX) fell 39 places from rank 71 to rank 110. Sandisk Corporation (SNDK) fell 30 places from rank 57 to rank 87. Western Digital Corp. (WDC) fell 28 places from rank 98 to rank 126. Other technology fallers included Arm Holdings (ARM), KLA Corporation (KLAC), Lam Research Corp (LRCX), Applied Materials, Inc. (AMAT) and Amphenol Corporation (APH). Outside technology, AT&T (T) fell 22 places from rank 93 to rank 115. Eaton Corporation plc (ETN) fell 18 places from rank 94 to rank 112.

ConocoPhillips (COP) climbed 20 places from rank 105 to rank 85. The technology climbers were SAP SE (SAP), ServiceNow, Inc. (NOW), International Business Machines Corporation (IBM), Shopify Inc. (SHOP) and Salesforce, Inc. (CRM). Other climbers included Home Depot, Inc. (HD), Shell (SHEL), McDonald's Corporation (MCD), Union Pacific Corp. (UNP) and Intuitive Surgical Inc. (ISRG).

Vylor Inc. (VYLR) debuted at rank 322. Skydance Corporation (SKYD) debuted at rank 395. At the lower universe boundary, Match Group, Inc (MTCH), QIAGEN N.V. (QGEN), DraftKings Inc. (DKNG) and Ryder System, Inc. (R) were added rather than making debuts. Warner Bros. Discovery, Inc. Series A (WBD) left after holding rank 212. Other departures included Vicor Corp (VICR), TTM Technologies Inc (TTMI), FormFactor Inc. (FORM) and Paramount Skydance Corporation (PSKY).

There were no order changes inside the top 10.