Largest Companies by Market Cap - October 2025
How these values were calculated
- Reconstructed, not recorded
- The share counts in force at the close of October 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 October 2025 carries the largest error. Months recorded while their inputs were current carry no marker.
Swipe or scroll the table sideways for more columns.
Micron Technology, Inc. (MU) climbed 22 places, from rank 62 to rank 40. Semiconductors were the clearest upward cluster, with MU, Intel Corp (INTC) and Advanced Micro Devices (AMD) all climbing. Texas Instruments Incorporated (TXN) fell 19 places, from rank 76 to rank 95.
Arm Holdings plc American (ARM) climbed 18 places, from rank 90 to rank 72. Intuitive Surgical Inc. (ISRG) rose 17 places, from rank 85 to rank 68. Lam Research Corp (LRCX) rose 16 places, from rank 77 to rank 61, while Amphenol Corporation (APH) climbed 15 places, from rank 89 to rank 74.
Apple Inc. (AAPL) moved to No. 2 in the top 10. Microsoft Corp (MSFT) moved to No. 3. Tesla, Inc. (TSLA) and Broadcom Inc. (AVGO) each moved ahead of Meta Platforms, Inc. (META) in the top 10. META fell to No. 8.
Among the biggest decliners, AT&T Inc. (T) and Progressive Corporation (PGR) each fell 20 places. Verizon Communications (VZ) slipped 15 places, from rank 66 to rank 81. Linde plc (LIN) fell 14 places, from rank 50 to rank 64. Mr. Cooper Group Inc. (COOP) left the ranking after holding rank 728 in September. No new company appeared.
Both the
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.
About this ranking
This page ranks 942 US-listed companies by the market capitalization each one carried at the close of October 2025. The values do not change, because October 2025 is over; this is what the ranking looked like then, and it will look the same the next time you visit.
Market capitalization is the share price multiplied by the number of shares outstanding. Each figure on this page uses that month's closing share price, so the ranking reflects the market as it stood at the close of October 2025 rather than today. Rank Change compares each company's position with its position at the end of the previous month. A company whose position shifted only because another company entered or left the ranking above it shows no change, because it did not move.
This month was reconstructed: the closing prices are the ones recorded for October 2025, but the share counts are today's, so every value marked est. carries the share-count drift since then.
For the ranking at today's prices, see the live market cap ranking.