An index that ranks named companies owes its readers a record of every change it makes. This page is that record: what changed, why, and what triggered it. Scores are never adjusted by hand — only re-measured — and revenue changes always carry a source.
Found something wrong that is not listed here? Tell us — corrections with a public source get applied and logged.
Wesco International (40), Arrow Electronics (49), Uline (56), and Avnet (57) block standard clients from their product pages, including this index's production extractor. Rather than leave the biggest names in several verticals blank, we added a documented browser fallback: the same five sampled pages, read in a full Chrome browser session, scored by the same frozen rubric. Each of their scorecards discloses the browser measurement, and the Machine & Agent Readiness pillar is still scored from what a standard client can retrieve — for a crawler, the block is the reality. Future Electronics (68) recovered on a plain re-run of the standard pipeline; its July failure was transient. The measured set grew from 32 to 37 companies; the median (58) and median attributes per page (11) did not move.
Companies affected: Wesco International · Arrow Electronics · Uline · Avnet · Future Electronics
An adversarial verification pass tried to refute every 'no public catalog' claim in the index. Sixteen of thirty-three fell: these companies do operate live public product pages, usually on an owned banner storefront the corporate domain never mentions — Consolidated Electrical Distributors sells through Greentech Renewables, Würth Industry through Northern Safety, US LBM through Higginbotham Brothers, Builders FirstSource launched shop.bldr.com, and Rexel's webshop was simply back online after an outage our original run happened to hit. Those rows now read 'not yet measured — catalog verified live,' with the verified URLs recorded. They carry no score this edition because scores are only ever published from samples taken under the five-category sampling rule; they are queued for the next measurement run. The honest 'no public catalog' count is now seventeen.
Companies affected: Rexel (North America) · OTC Industrial Technologies · Wajax Corp · Builders FirstSource · MRC Global · Ben E. Keith Co. · Cencora (formerly AmerisourceBergen) · Cardinal Health · US LBM · Consolidated Electrical Distributors (CED) · Würth Industry North America · Singer Industrial · Hajoca · North American Plastics · SRS Distribution · Breakthru Beverage
A widely-circulated '$17.8B North America' figure for Brenntag — printed even in trade lists — is actually Brenntag SE's global FY2025 sales. The company's own Annual Report 2025 (note 3.24, external sales by country) puts US plus Canada at EUR 5,750.2M, roughly $6.5B at the report's stated average rate. The row now carries the correct North America figure with the annual report as source.
Companies affected: Brenntag North America
All 117 rows that were 'not disclosed' or ranked on a dated figure were re-researched with the requirement that a figure only counts if a source we actually opened states it. Twenty-eight rows gained a sourced figure — including White Cap ($6.1B, company fact sheet), Hajoca ($4.2B), Owens & Minor ($8.0B FY2024, a public company we had simply missed), McNaughton-McKay ($2.2B), Mouser ($4.1B FY2022), SRS Distribution (~$10B in its last standalone year), and Vallen (~$1.9B FY2021) — each labeled with its fiscal year, basis, and estimate/dated flags where they apply. Sixty-six rows were confirmed genuinely private: no credible public figure exists, and they remain honestly undisclosed rather than estimated. The index now ranks 124 companies on disclosed revenue, up from 105.
QXO completed its $2.25B acquisition of Kodiak Building Partners on April 1, 2026; Kodiak is now listed as part of QXO and excluded from the ranking so the combined business is not counted twice. QXO itself is ranked on its reported FY2025 net sales of $6.84B, with a note that the figure predates the Kodiak close. Separately, Imperial Dade and BradyPLUS completed their merger on March 12, 2026 and unified as Imperial Brady (~$10B combined); the BradyPLUS row is retained for reference but unranked. Reece USA's $3.3B was double-checked against a conflicting $5.1B trade figure and confirmed correct — Reece discloses its US segment natively in USD.
Companies affected: Kodiak Building Partners · QXO (formerly Beacon) · BradyPlus · Reece USA
The methodology page described the attribute-depth signal as one point per structured attribute capped at 15. The frozen scorer actually awards half a point per attribute, capped at 15 — a scale calibrated once, before publication, because the earlier scale saturated and stopped discriminating. The page now matches the instrument. No scores changed; the text was wrong, not the scorer.
Rows where bot protection prevented any read were previously labeled 'extraction failed,' which describes our pipeline rather than the situation. They now read 'not observable' everywhere, with the same underlying rule: an unreadable site is never reported as having no data, because we did not observe the data either way. Medline was additionally re-tested in a full browser session and serves a blank page even there; its note now says so.
Companies affected: Medline Industries · QXO (formerly Beacon) · The Hillman Group · The Home Depot (Pro) · Associated Industries