The market's
heavy hitters.

Coverage & sources

US-listed coverage. Ranking covers eligible US-listed SEC issuers with IEX daily bars and usable SEC share counts; it is not a global top 100.

Data source: SEC EDGAR; daily bars: Alpaca IEX. Only derived market caps, ranks and changes are published. IEX is a single exchange, not the consolidated official close. Country reflects filing jurisdiction; sectors use broad SEC SIC groups.

3155 eligible issuers from 6036 in the SEC listing universe; 3265 excluded. Non-common directory listings are omitted before Alpaca bar/share valuation and listed in exclusions. IEX is a single exchange, not the consolidated official close. Share counts can be stale between filings; only manually sourced splits in corporate-actions.json are reconciled for single-security DEI counts. Ambiguous classes and unsourced ADR conversions are excluded. Non-US incorporation with more than 100 billion DEI shares requires an ADS ratio even for domestic-form filers (a heuristic, not proof of ADS status). Unmapped caps above 5x timely SEC public float require an ADS ratio. Changes above 3x in either direction versus the prior retained snapshot are excluded before ranking; see exclusions. Class price fallback: CIK 0001067983 BRK.A priced from BRK.B at 1500:1 for session 2026-10-30. SEC quality checks retain staleness, possible issuance, newer-report and share-definition review signals. Only point-in-time gaps over 3% against a count no more than 100 days before the selected count contribute to the 10-row gate; top-10 gaps over 10% against those counts block. Top-10 point-in-time ratios of at least 10x or at most 0.1x block regardless of comparator age within the existing 400-day cutoff. Filing signals, age alone, weighted averages and smaller outdated point gaps are informational; implausible weighted-average scales are noted separately. These are not verified valuation errors.

Non-SEC/non-US-listed companies, including Saudi Aramco and non-US-listed Tencent securities, are outside this ranking.