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.
Swipe or scroll the table sideways for more columns.
Semiconductors produced the sharpest gains between
Outside semiconductors, Applovin Corporation (APP) was a major climber, rising 37 ranks to rank 43 from rank 80. Lam Research Corp (LRCX) gained 32 ranks to rank 77 from rank 109. Amphenol Corporation (APH) advanced 14 ranks to rank 89 from rank 103. Banco Santander S.A. (SAN) climbed 11 ranks to rank 87 from rank 98.
Declines were led by S&P Global Inc. (SPGI), which fell 19 ranks to rank 97 from rank 78. Texas Instruments Incorporated (TXN) and Danaher Corporation (DHR) each declined 15 ranks; TXN finished at rank 76 from rank 61, while DHR finished at rank 105 from rank 90. Accenture PLC (ACN) fell 13 ranks to rank 81 from rank 68. Boeing Company (BA) and Boston Scientific Corp. (BSX) each fell 12 ranks.
At the top of the table, Tesla, Inc. (TSLA) overtook Broadcom Inc. (AVGO). TSLA rose to rank 7 from rank 8. AVGO fell to rank 8 from rank 7. 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 943 US-listed companies by the market capitalization each one carried at the close of September 2025. The values do not change, because September 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 September 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 September 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.