Largest Companies by Market Cap - March 2026
How these values were calculated
- Reconstructed, not recorded
- The share counts in force at the close of March 2026 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 March 2026 carries the largest error. Months recorded while their inputs were current carry no marker.
Swipe or scroll the table sideways for more columns.
What changed in this ranking
AI-generated summary by Rhea-AI, written on . How Rhea-AI works.
Between the close of March 2026 and the close of February 2026, Petroleo Brasileiro S.A.-Petrobras (PBR) rose 45 places to rank 98; both rankings were reconstructed. Arm Holdings (ARM) climbed 29 places to rank 78. ConocoPhillips (COP) gained 26 places to rank 79. Unilever plc (UL) fell 26 places to rank 114. Southern Copper Corporation (SCCO) fell 21 places to rank 94. HDFC Bank Limited (HDB) declined 20 places to rank 105.
In the top 10, Broadcom Inc. (AVGO) overtook Tesla, Inc. (TSLA) and Meta Platforms, Inc. (META), while TSLA also overtook META. AVGO finished at rank 7. TSLA held rank 8. META finished at rank 9.
Sunbelt Rentals Holdings, Inc. (SUNB) entered the ranking at rank 473. PayPay Corporation (PAYP) entered at rank 711. Exact Sciences Corp (EXAS) left the ranking from rank 611. Confluent, Inc. (CFLT) left from rank 844.
Other climbers included TotalEnergies SE (TTE), Pfizer Inc. (PFE), Shell (SHEL), AT&T (T), The Charles Schwab Corporation (SCHW), PDD Holdings Inc. (PDD), Palantir Technologies Inc. (PLTR), The TJX Companies, Inc. (TJX) and International Business Machines Corporation (IBM). Other fallers included Stryker Corporation (SYK), GE Aerospace (GE), SAP SE (SAP) and Deere & Company (DE).
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 940 US-listed companies by the market capitalization each one carried at the close of March 2026. The values do not change, because March 2026 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 March 2026 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 March 2026, 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.