A Correction: Amazon Led Eight of Ten Industries Because We Read Amazon

The control column is computed inside himalayas alone, the largest broad board in our corpus, where no employer has a direct pipe into our data. Healthcare stays first and roughly doubles the next industry, which is the one result that holds. Everything else reorders: operations falls from second to sixth, design rises from eighth to second. A ranking that reorders under its own control is not a ranking.

Source: Seeker job corpus, 257,534 active job postings, snapshot 2026-08-16. seekerscore.com/insights/employer-concentration-2026

Correction, 2026-08-16

What this page claimed: 'In Healthcare, Ten Employers Post Half the Jobs. In Marketing, an Eighth,' a ten-row ranking of industries by top-ten employer share, and a section headed 'Amazon is the largest employer in seven of eleven industries.' What is true: Amazon is the largest employer in most rows because we run a dedicated Amazon connector, which contributes 15,148 active postings spread across every industry we classify. Healthcare's largest is Kaiser Permanente, whose career system we also read directly, and finance's is JPMorgan Chase, whose own careers portal is one of our sources. In all ten rows, the largest employer is one we ingest directly. That column was reporting our integrations list.

The control, and what it did to the ranking

The test is to compute the same measure inside a single broad job board, where no employer has a private pipe into our corpus. Using himalayas, the largest such board we carry: healthcare 27.8%, design 13.8%, marketing 9.2%, engineering 8.9%, finance 7.9%, operations 7.0%. Two things happen. The shares roughly halve, because pooling across sources lets a directly-connected employer stack up in a way no single board would show. And the order changes: operations falls from second place to last, design climbs from eighth to second. A ranking whose order is not stable when you hold the source constant was never measuring the thing it named.

What survives, and it is the useful part

Healthcare really is the most employer-concentrated field we measure. It leads under the control at 27.8% against a next-highest of 13.8%, roughly double, and it led before the control too. That is a genuine structural fact and it is the fact the page existed to convey: in healthcare, a small number of large systems do a disproportionate share of the hiring, so identifying and tracking those employers is a better use of effort than broad applying. The strategic advice in the original page follows from that and is unchanged for healthcare. What we can no longer support is the precise share, the ordering of the other nine industries, or any claim about which single employer leads a field.

What is withdrawn

The 49.3% and 12.4% headline figures and every other absolute top-ten share. The ten-row ranking. The 'largest employer' column in its entirety. And the section reporting that Amazon leads most industries, which was our connector list presented as a market observation. We are not publishing corrected absolute shares, for the same reason we did not on the metro page: an honest employer-concentration figure requires seeing a representative sample of an industry's employers, and a corpus assembled partly from individual employers' own career systems does not.

How we measured it (and what we did not claim)

The correction is a within-source recomputation of the same measure over the same corpus on 2026-08-16: top-ten employer share per industry, computed first across all sources as originally published, then inside himalayas alone. Industries are our own domain classifier, unchanged. We are NOT claiming Amazon is not a large employer, which it obviously is, nor that healthcare is not concentrated, which the control supports. We are claiming that the size of an employer in our corpus is a function of whether we read their careers system directly, so 'largest employer' is not a measurement we are able to make. The other two figures this page published, that 52.2% of employers post in one function and that broad employers hold 79.2% of listings, are counts over the employers we happen to see and are scoped to the corpus rather than the market; they are left in place with that caveat rather than presented as market structure. This is the fourth correction today from one root cause: a claim built by comparing our own copy of the world against itself.

Frequently asked questions

Related Data

Guides

• How Many Jobs Should I Apply To? →
• Hidden Job Markets →
• Company Clusters →