GridOwners — Who Owns US Generating Capacity

Who owns the grid, by kind of owner

The American grid is not mostly owned by the utilities on your bill. Independent power producers — merchant generators, fund-backed platforms, project companies — now hold the largest share of national capacity.

“Unattributed” = filers with no entity-type code plus Schedule-4 owners that are not themselves filing utilities.

The largest owners (top 30 of 100 named)

All 100 named owners, with per-owner state lists and technology mixes, ship in the keyless JSON.

Where the capacity is (top 15 states)

What the grid runs on

Method & caveats

• Source: Form EIA-860, 2025 Early Release (eia.gov), a US government work in the public domain. Early-release data is filer-reported and subject to revision in the final release.
• Ownership model is EIA's own: a generator belongs to its operating utility unless Schedule 4 reports ownership shares — 261 GW of capacity is split-owned that way. Owned MW = percent owned × nameplate.
• Nameplate capacity is not generation: a megawatt of peaker gas and a megawatt of baseload nuclear appear identical here. This is an ownership register, not an output statistic.
• Owner names are as filed; the same corporate family may appear under several filing names (Duke Energy's state utilities file separately, for example). No consolidation to ultimate parents is asserted — that is phase-2 work.
• Regenerate: python3 scripts/build_grid_owners.py against a fresh EIA-860 download; the person-name exclusion list is re-reviewed by hand on every regeneration.

Machine access

The full dataset — metadata, entity-type aggregates, all 100 named owners, state and technology tables — is one keyless fetch:

import requests
grid = requests.get("https://ai-analytics.org/grid-owners/index.json").json()
top = grid["topOwners"][0]
print(top["name"], top["mw"], "MW")  # Florida Power & Light Co 39992 MW

Also listed in the Voidly datasets manifest and /data. License: public domain source; this compilation CC0.