Largest Companies by Market Cap - Complete Rankings

Compared with the close of September 2026, the current board is a live snapshot rather than a completed month-end list. Seagate Technology Holdings plc (STX) fell 29 places, from rank 71 to rank 100. AT&T (T) fell 21 places to rank 114 from rank 93. Sandisk Corporation (SNDK) fell 20 places to rank 77 from rank 57.

Technology had a downward cluster, with STX, SNDK, Arm Holdings (ARM), KLA Corporation (KLAC) and Lam Research Corp (LRCX) all falling. Communication Services had a downward cluster, with T, T-Mobile US, Inc. (TMUS) and NetFlix Inc (NFLX) all falling. Financial Services also saw declines from Banco Santander S.A. (SAN), The Charles Schwab Corporation (SCHW) and Sumitomo Mitsui Financial Group, Inc. (SMFG). Technology supplied an upward cluster through SAP SE (SAP), International Business Machines Corporation (IBM) and Shopify Inc. (SHOP).

ConocoPhillips (COP) rose 21 places to rank 84 from rank 105. SAP rose 13 places to rank 51 from rank 64. Blackrock, Inc. (BLK) and Union Pacific Corp. (UNP) each rose 12 places.

Within the top 10, Broadcom Inc. (AVGO) and Tesla, Inc. (TSLA) both moved ahead of Meta Platforms, Inc. (META). AVGO is at rank 9. TSLA is at rank 10. META is at rank 11.

Vylor Inc. (VYLR) debuted at rank 331. Skydance Corporation (SKYD) debuted at rank 388. Other additions at the lower end reflect the universe boundary rather than company debuts. Warner Bros. Discovery, Inc. Series A (WBD) left after holding rank 212. Paramount Skydance Corporation (PSKY) left after holding rank 831.