Half the supplier bench, a sixth of the coverage

This site keeps two datasets that were built for different reasons and have never been compared. One is the catalog: 234 parts across eleven layers, 1,199 companies, and 1,863 placements of a company onto a part. The other is the news pipeline, which reads twelve feeds nightly — trade titles plus a few company newsrooms — and tags each item with the parts it is about.

Laying one over the other measures something specific and narrow — not what matters in a data center, but where the trade press points relative to where the suppliers are.

The table

Every item published between 17 August and 7 September 2026 that cleared the pipeline’s 0.6 confidence threshold: 567 items, of which 533 carry at least one part. An item can touch more than one layer, so the counts below are item-layer pairs, 732 of them.

The four layers between the cold plate and the substation — cooling, facility HVAC, power distribution, power generation — hold 801 of the 1,863 placements, 43% of the supplier bench. They took 120 of the 732 item-layer pairs, 16%. Compute silicon inverts it: 161 placements, 8.6% of the bench, and 258 pairs, 35% of the coverage. Five parts account for a quarter of everything in the window on their own — merchant GPUs at 101 items, hyperscaler custom ASICs at 75, advanced packaging at 60, memory modules at 46 and HBM at 40. Across the same three weeks, 107 of the 234 parts drew nothing at all.

The building layer is not what it looks like

Building shell and construction appears to break the pattern at 10.2%. It does not. Of its 75 item-layer pairs, 60 land on two parts: Hyperscalers, neoclouds & model labs at 34 and Data center developers, operators & REITs at 26. Those are the parties signing leases and announcing sites — buyers and operators, not makers of anything. Steel, envelope and site equipment drew 7. General contractors drew 21, which is real coverage of who is building, and MEP design 12.

Read the layer row as construction news and you would have it backwards. It is deal news filed against the layer where the deals happen.

The second measurement

The catalog carries a confidence tag on every placement — disclosed, reported, inferred — and a citation where one exists. As of today, 80 of 1,863 placements carry a source URL, added over five deliberate batches of first-party verification. The rule for each is the same: fetch the supplier’s own product page, and tag disclosed only if the page names the part.

The hit rate varies by layer in the same direction as the coverage. An early batch on memory and storage sourced 25 placements from 31 candidate URLs. Today’s batch on power distribution probed 63 URLs across two rounds; 21 returned a usable page and 12 of those supported the claim. The failures were not obscure firms. Schneider Electric’s product pages return 403 to anything that is not a browser; Eaton’s timed out; Caterpillar and Cummins both refuse non-browser clients; CG Power, LS Electric and Socomec render their catalogs client-side, so a fetch returns an empty page with a 200 on it.

What did source cleanly reads like a list of companies that still publish a catalog as documents: Hitachi Energy and Siemens Energy on large power transformers, Pennsylvania Transformer alongside them, Hitachi Energy again on HV switchgear and breakers, Starline on busway, and ABB, Vertiv, Piller, Riello, Centiel and Toshiba on UPS.

Two candidates were reachable and still rejected, which is the point of having the tag. ABB’s substation-automation URL returns 200 and serves a page titled Hitachi Energy — that business moved there. Delta Electronics has a page filed under busway.php whose copy never uses the word: it documents floor PDUs, remote power panels and static transfer switches, so it was used to source that part instead and the busway placement stayed inferred. A 200 is necessary, not sufficient.

What is actually being measured

The feed list, mostly. DigiTimes supplies 271 of the 567 items and covers the Taiwanese semiconductor supply chain; Tom’s Hardware adds 75 and EE Times 17. Data Center Dynamics is the only general infrastructure title in volume, at 106. Utility Dive, at 21, is the only feed pointed at the power industry at all. Change that list and the top half of the table moves.

That is a caveat, not a dismissal, because the same shape shows up in the sourcing work, where the feed list has no say. The upstream half of a data center is covered thinly by the press that a reader of this site is likely to encounter, and documented thinly by the firms themselves. A transformer maker with a two-year backlog has no product launch to announce and no reason to keep a crawlable catalog.

The consequence for anyone trying to answer a supply question is concrete. On energy storage, 17 items in three weeks against 23 suppliers spread over its six child parts; on gas turbines, 7 items against 9 suppliers. That is not enough flow to notice a change from news alone. The catalog rows are the more reliable object here, and their weakest attribute is the one being fixed a batch at a time: 1,767 of them still say inferred, which means nobody has checked.