spb/firc0001_uqo

1\begin{tabular}{lr}2\toprule3Step & Count \\4\midrule5iShares IWV holdings file, equity lines with a ticker (as of Oct 23, 2026); count reported by the build log, source file not archived & 2{,}587 \\6\quad of which mapped to an SEC CIK (CVRs, escrow lines and FDIC-only banks excluded) & 2{,}573 \\7\quad distinct CIKs (share classes collapsed) & 2{,}555 \\8S\&P~500 constituents, cached snapshot of 2026-05-25 (500 CIKs) & 503 \\9\midrule10Merged issuer universe (distinct CIKs) & 2{,}564 \\11\quad in both lists & 491 \\12\quad S\&P~500 only & 9 \\13\quad Russell proxy only & 2{,}064 \\14\midrule15Issuers with at least one 10-K, 10-Q or 8-K since 2010 & 2{,}499 \\16Issuers without any such filing (foreign private issuers filing 20-F/40-F, FDIC-only banks) & 65 \\17Issuers with at least one resolved project & 2{,}492 \\18\bottomrule19\end{tabular}20