Largest Companies by Market Cap - December 2025
How these values were calculated
- Reconstructed, not recorded
- The share counts in force at the close of December 2025 were not recorded at the time. Each value marked est. is that month's closing price multiplied by the share count on record today, so a buyback or an issuance since then moves it. The closing prices are exact; the share counts are today's.
- What that changes
- Ranks near each other can swap, and a company whose share count changed sharply since December 2025 carries the largest error. Months recorded while their inputs were current carry no marker.
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What changed in this ranking
AI-generated summary by Rhea-AI, written on . How Rhea-AI works.
Arm Holdings (ARM) fell 23 places, from rank 100 at the close of November 2025 to rank 123 at the close of December 2025. The comparison uses reconstructed rankings for both periods.
Sony Group Corporation (SONY) fell 20 places, from rank 75 to rank 95. UBS Group AG (UBS) rose 20 places, from rank 120 to rank 100. Boeing Company (BA) rose 19 places, from rank 94 to rank 75.
GE Vernova (GEV) rose 12 places, from rank 84 to rank 72. Banco Santander S.A. (SAN) rose 12 places, from rank 86 to rank 74. Welltower Inc. (WELL) fell 14 places, from rank 93 to rank 107. ServiceNow, Inc. (NOW) fell 13 places, from rank 77 to rank 90.
Additional climbers included Salesforce, Inc. (CRM), Applovin Corporation (APP), Accenture plc (ACN), The Charles Schwab Corporation (SCHW), Capital One Financial (COF), BHP Group Limited (BHP) and Micron Technology, Inc. (MU); all rose. Additional fallers included NextEra Energy, Inc. (NEE), Uber Technologies, Inc. (UBER), Intel Corp (INTC), Boston Scientific Corporation (BSX), AT&T (T), Palo Alto Networks, Inc. (PANW), Amphenol Corporation (APH) and Gilead Sciences Inc (GILD); all fell.
Inside the top 10, Tesla, Inc. (TSLA) rose 1 place to rank 6, moving ahead of Broadcom Inc. (AVGO). Meta Platforms, Inc. (META) rose 1 place to rank 7, also moving ahead of AVGO. AVGO fell 2 places, from rank 6 to rank 8.
Medline (MDLN) entered the ranking at rank 265. Kellanova (K) left the ranking from rank 446.
Compares this month's close with the previous month's close. A company that shifted only because another entered or left the ranking above it is not counted as having moved.