{
  "_about": "L5 (cluster I, FIRC0001-ADVE-09 / THEO-07). Russell 3000 constituent count and IWV fund facts read from public documents on 2026-11-05 (laptop, no API). Every figure below was read from the document named; nothing is inferred.",
  "retrieved_on": "2026-11-05",
  "index_constituents": 2996,
  "index_constituents_label": "Number of Holdings, Russell 3000 Index (the Russell 3000E, which adds micro-caps, lists 3,432)",
  "index_as_of": "2026-09-30",
  "source_title": "FTSE Russell, Russell 3000 Index Factsheet, index characteristics as of 9/30/2026",
  "source_url": "https://research.ftserussell.com/Analytics/FactSheets/Home/DownloadSingleIssue?issueName=US3000USD&isManual=True",
  "source_sha256": "281e92643781cf19a3f4bc6a670e0719aa5ef1347d1071300491274aed0436e4",
  "source_note": "The factsheet nearest to the holdings date of the build (2026-10-23) is the September 30, 2026 issue; no October 31, 2026 issue was published at retrieval time. The index was reconstituted semi-annually in 2026 (factsheet text), so the 2026-10-23 holdings and the 2026-09-30 characteristics fall in the same reconstitution window.",
  "fund_holdings_count": 2588,
  "fund_holdings_as_of": "2026-11-04",
  "fund_holdings_note": "Number of Holdings shown on the iShares product page on 2026-11-05 (as of Nov 04, 2026); it counts fund lines (including cash and derivative lines), not SEC registrants, and is dated 12 days after the holdings file used by the build (2,587 equity lines with a ticker, 2026-10-23, count reported by the build log; file not archived).",
  "fund_source_url": "https://www.ishares.com/us/products/239714/ishares-russell-3000-etf",
  "replication_method": "representative sampling",
  "replication_quote": "BFA uses a representative sampling indexing strategy to manage the Fund. \"Representative sampling\" is an indexing strategy that involves investing in a representative sample of securities or other instruments intended to collectively have an investment profile similar to that of an applicable underlying index.",
  "replication_source_title": "iShares Russell 3000 ETF, Summary Prospectus (incorporating the Prospectus and SAI dated July 31, 2026), section Principal Investment Strategies",
  "replication_source_url": "https://www.ishares.com/us/literature/summary-prospectus/sp-ishares-russell-3000-etf-3-31.pdf",
  "proxy_distinct_ciks": 2555,
  "proxy_mapped_equity_lines": 2573,
  "proxy_equity_lines_reported": 2587,
  "coverage_share_distinct_ciks_pct": 85.3,
  "coverage_share_mapped_lines_pct": 85.9,
  "coverage_share_reported_lines_pct": 86.3,
  "coverage_formula": "100 * proxy count / index_constituents (2,996); the three numerators are SEC-registrant CIKs after share-class collapse (2,555), equity lines mapped to a CIK (2,573) and equity lines with a ticker as reported by the build log (2,587)",
  "caveats": [
    "Dates differ: index characteristics 2026-09-30, holdings file 2026-10-23, fund page 2026-11-04.",
    "Index constituents are securities, the proxy counts are issuers (share classes collapsed), so the ratio understates issuer coverage by the number of multi-class constituents, which is not known without the licensed constituent list.",
    "Representative sampling means the fund may omit index members; which members are omitted cannot be determined from public documents.",
    "The 2,587 equity-line count comes from the build log; the holdings file is not archived (Stage D feasibility report, N10)."
  ],
  "methodology_document": {
    "title": "Russell US Equity Indexes: Construction and Methodology, v7.2, August 2026",
    "url": "https://www.lseg.com/content/dam/ftse-russell/en_us/documents/ground-rules/russell-us-indexes-construction-and-methodology.pdf",
    "sha256": "26d2d051beb27a6a808af7c17a2e2871cc5388e669bedbb42cbc4d0d3ce47c76",
    "downloaded": "2026-11-05"
  }
}