Largest Companies by Market Cap - September 2025
How these values were calculated
- Reconstructed, not recorded
- The share counts in force at the close of September 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 September 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.
The biggest gains were concentrated in semiconductor companies, led by Micron Technology, Inc. (MU) and Intel Corp (INTC), which each climbed 40 places. MU reached rank 62 from rank 102. INTC reached rank 74 from rank 114. Applied Materials, Inc. (AMAT) rose 24 places to rank 83 from rank 107.
Applovin Corporation (APP) climbed 37 places to rank 43 from rank 80. Lam Research Corp (LRCX) climbed 32 places to rank 77 from rank 109, extending the strong upward showing among semiconductor-related companies.
In the top 10, Tesla, Inc. (TSLA) rose 1 place to rank 7. TSLA moved ahead of Broadcom Inc. (AVGO) in the top 10. AVGO fell 1 place to rank 8.
The largest declines were led by S&P Global Inc. (SPGI), Texas Instruments Incorporated (TXN), and Danaher Corporation (DHR), all of which fell. SPGI fell 19 places to rank 97 from rank 78. TXN fell 15 places to rank 76 from rank 61. DHR fell 15 places to rank 105 from rank 90. The next notable declines came from Accenture plc (ACN) and Boeing Company (BA), which both fell. ACN fell 13 places to rank 81 from rank 68. BA fell 12 places to rank 72 from rank 60.
The rankings for
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.