Nuclear Plant Ownership

Belgium (2)

Antwerp – Doel (1 operating unit)

50% – Belgian State
50% – ENGIE (via Electrabel) (via BE-NUC joint venture, formed 14 March 2025)

Only Doel 4 operating (Unit 1 shut Feb 2025, Unit 2 shut Nov 2025, Unit 3 shut 2022). July 2026: replaces prior 89.8%/10.2% Electrabel/Luminus split, superseded by direct Belgian state buy-in.

Units on the site

Unit 1 (historical):
- 100% – Electrabel/Engie
Unit 3 (historical):
- 89.8% – Electrabel/Engie
- 10.2% – EDF Luminus
Unit 4 (operational):
- 50% – Belgian State
- 50% – Electrabel/Engie

Only Unit 4 is still operational today.

Distance between units: Satelite imagery blocked and no official statements about distance, but I managed to find pictures from birds view and, very rough estimates, the distance between Units 1 & 2 is definetely around 100 m, they are very close. Distance between Units 2, 3 & 4 (the only operational one) is about the same, but hard to say for sure, around 200 m.

Shared facilities: No confident data, but Spent fuel storage buildings were share between Uints 1&2 and Units 3&4

Ownership history

Unit 1: Originally fully owned by Engie until shut down.

Unit 3: Almost exact same history as Tihange unit 3. Hence, same ownership percentages.

Unit 4: Again, same as Doel 3 and Tihange 3, but since march 2025 whole ashare was transferred to joint venture BE-NUC, which is 50/50 between Engie and Belgian state.

Liège – Tihange (1 operating unit)

89.8% – Electrabel (Engie)
10.2% – EDF Luminus

Only Tihange 3 operating (Unit 1 shut Sept 2025, Unit 2 shut 2023). CORRECTED July 2026: replaces prior 89.8%/10.2% Electrabel/Luminus split. Historically Tihange 1 was 50% Electrabel/50% EDF while running.

Units on the site

Unit 1 (historical):
- 50% – Electrabel/Engie
- 50% – EDF Belgium
Unit 3 (operating):
- 89.8% – Electrabel/Engie
- 10.2% – EDF Luminus

While Tihange 1 was operating alongside 2 & 3, it had a materially different split (50/50) from its site-mates (89.8/10.2). Only Unit 3 is still operating today (Units 1-2 shut down 2023/2025).

Shared facilities: Spent fuel storage building

Ownership history

Unit 1: EDF was the original owner of 50% share. The other original holder of 50% share was Intercom, Belgian Utility company.

In 1990, Intercom, EBES and Unerg were consolidated into Electrabel, so Electrabel became the holder of the Belgian 50% interest. Electrabel was progressively taken over by Suez, which merged with Gaz de France in 2008 to form GDF Suez and was renamed ENGIE in 2015.

Unit 3: Originally owned by belgian utility companies, that later formed Electrabel (96%) and a small part was owned by SPE (4%). As part of measures intended to increase competition in Belgian electricity generation, SPE obtained additional generation capacity from Electrabel in 2009. Its Tihange 3 interest consequently increased to 10.2%, leaving Electrabel with 89.8%. SPE became EDF Luminus, and later simply Luminus, controlled by EDF.

Canada (1)

Kincardine, ON – Bruce (8 operating units)

100% – Owned by OPG
Leased & operated by Bruce Power LP:
- 48.26% – OMERS Administration Corp.
- 48.26% – TC Energy Corp.
- 2.22% – Power Workers' Union Power 1 LP
- 1.26% – other employee trusts

World's largest operating nuclear site by unit count.
Long-term lease structure: 100% owned by OPG, but leased to 4 parties.

Finland (1)

Eurajoki – Olkiluoto (3 operating units)

Teollisuuden Voima Oyj (TVO):
- ~57-58.5% – Pohjolan Voima Oy (itself owned by UPM, Stora Enso & other industrials)
- ~25-27% – Fortum
- <15% – other industrial shareholders

Cost-price consortium model - owners take power at cost
Unit 3 (EPR) completed final takeover June 2025

France (2)

Ardennes – Chooz (2 operating units)

100% – EDF (direct equity ownership)

Electrabel (ENGIE, Belgium) holds contractual drawing rights to 25% of Chooz B output (~750 MWe) — not equity, but long-term output entitlement.

July 2026: previously shown as unqualified 100% EDF. Reciprocal historical arrangement tied to EDF's former 50% stake in Tihange 1 (now shut down). Applies to Chooz B1+B2 (the only operating units).

Drôme – Tricastin (4 operating units)

100% – EDF (direct equity ownership)

Electrabel (ENGIE, Belgium) holds contractual drawing rights to 458 MWe of site output — not equity, a long-term output entitlement.

July 2026: previously shown as unqualified 100% EDF. Same reciprocal Franco-Belgian arrangement as Chooz. Site has 4 units; source does not specify which unit(s) the 458 MWe is drawn from.

Hungary (1)

Paks (4 operating units)

~99%+ – MVM Hungarian Electricity Ltd (Hungarian state)

Small minority shares held by local municipalities (exact % not published). A separate 'golden share' with veto/voting rights is held directly by the Hungarian government, outside MVM's stake.

Netherlands (1)

Zeeland – Borssele (1 operating unit)

EPZ:
- 70% – PZEM (Provinciale Zeeuwse Energie Mij., part of Czech EPH group)
- 30% – RWE

Only Dutch reactor; 2 new reactors proposed for same site

Romania (1)

Cernavodă (2 operating units)

100% – Nuclearelectrica:
- 82.49% – Romanian State
- 17.51% – Minor shareholders (publicly traded)

Slovakia (2)

Jaslovské Bohunice – Bohunice (V2) (2 operating units)

Slovenské elektrárne:
- 66% – Slovak Power Holding BV (controlled by Czech EPH group)
- 34% – Slovak Republic

Mochovce (3 operating units)

Slovenské elektrárne:
- 66% – Slovak Power Holding BV (controlled by Czech EPH group)
- 34% – Slovak Republic

Units 1-3 operating
Unit 4 completed fuel loading July 2026, in final startup/commissioning (but not yet counted as operating)

Slovenia (1)

Krško (1 operating unit)

50% – GEN energija (Slovenian state)
50% – Hrvatska elektroprivreda / HEP (Croatian state)

Cross-border joint venture, dating to former Yugoslavia

Spain (4)

Cáceres – Almaraz (2 operating units)

52.7-53% – Iberdrola
36% – Endesa
11% – Naturgy

3-yr extension to 2030 requested Oct 2025

Tarragona – Ascó (2 operating units)

Unit 1:
- 100% – Endesa
Unit 2:
- 85% – Endesa
- 15% – Iberdrola

Same site, different owners per unit

Units on the site

Same site, same operating JV (ANAV) — but Unit 1 has zero Iberdrola stake while Unit 2 does.

Distance between units: 300 m (± 5m) center-to-center

Shared facilities: Cooling water source, Natural draft cooling tower, Spent fuel dry storage

Ownership history

Unit 1 & 2: Many investments into nuclear facilities in 1970s. In 1980s new government imposed a moratorium. In 1985 governent forced Endesa to buy heavily indebted companies (that invested heavily before moratorium) and in that way consolidate a market. Endesa nearly doubled in size after all transactions were done.

Iberdrola just bought a smaller company (HESCA) in 1994, and that smaller company's slice of Ascó came with it.

Guadalajara – Trillo (1 operating unit)

49% – Iberdrola
34.5% – Naturgy
15.5% – EDP (Hidroeléctrica del Cantábrico)
1% – Endesa (Nuclenor)

Most fragmented ownership of any Spanish plant

Tarragona – Vandellós II (1 operating unit)

72% – Endesa
28% – Iberdrola

Sweden (3)

Östhammar – Forsmark (3 operating units)

66% – Vattenfall AB (Swedish state)
~24-25.5% – Mellansvensk Kraftgrupp (Fortum-led)
~8.5-9.9% – Uniper (Sydkraft)

Oskarshamn (OKG) (1 operating unit)

54.5% – Uniper (Sydkraft)
45.5% – Fortum

Unit 3 operating
Units 1-2 shut down (2015-2017)

Varberg – Ringhals (2 operating units)

70.44% – Vattenfall AB
29.56% – Uniper (Sydkraft Nuclear Power)

Units 3-4 operating
Units 1-2 shut down (2019-2020)

Switzerland (2)

Däniken, Solothurn – Gösgen (1 operating unit)

40% – Alpiq AG
25% – Axpo Power AG
15% – City of Zurich (ewz)
12.5% – Centralschweizerische Kraftwerke (CKW)
7.5% – Energie Wasser Bern (EWB)

Leibstadt, Aargau – Leibstadt (1 operating unit)

~52.7% – Axpo Group (CKW 13.6% + Axpo Power 22.8% + Axpo Solutions 16.3%)
27.4% – Alpiq
14.5% – BKW Energie
5.4% – AEW Energie

Switzerland's largest reactor; 6-company consortium

United Kingdom (5)

County Durham – Hartlepool (2 operating units)

EDF Energy Nuclear Generation Group Ltd:
- 80% – EDF
- 20% – Centrica plc

Lancashire – Heysham 1 (2 operating units)

EDF Energy Nuclear Generation Group Ltd:
- 80% – EDF
- 20% – Centrica plc

Lancashire – Heysham 2 (2 operating units)

EDF Energy Nuclear Generation Group Ltd:
- 80% – EDF
- 20% – Centrica plc

Suffolk – Sizewell B (1 operating unit)

EDF Energy Nuclear Generation Group Ltd:
- 80% – EDF
- 20% – Centrica plc

East Lothian, Scotland – Torness (2 operating units)

EDF Energy Nuclear Generation Group Ltd:
- 80% – EDF
- 20% – Centrica plc

United States (17)

York County, SC – Catawba (2 operating units)

Unit 1:
- 61.51% – NC Electric Membership Corp
- 38.49% – Duke Energy Carolinas
Unit 2:
- 75% – NC Municipal Power Agency No.1
- 25% – Piedmont Municipal Power Agency

Same site, different owners per unit.
Percent of ownership entitles an owner to the part of energy produced by the station, but also makes him obligated to cover costs.

Units on the site

Duke Energy Carolinas is operator of both units but is only a direct owner of Unit 1.

Unit 2 owners are entirely different legal entities from Unit 1's.

Distance between units: 100 m (± 2m) center-to-center

Shared facilities: A lot of shared systems and components (Table for 5 pages). Click this link (Table 1-1).

Ownership history

Unit 1: Originally (1970) the split of ownership was:

25% – Duke Power
56% – NCEMC
19% – Saluda River Electric Cooperative

In result of transaction (2006-2008) Duke Power and NCEMC bought out SREC's stake in full, resulting in current share split.

Unit 2: No ownership changes since construction ended. In 2023 capacity-entitlement contract was signed, letting CEPC (a South Carolina co-op) buy access to 150 MW — 18% of NCMPA1's output — from Catawba 2. No ownership, though.

Baxley, GA – Edwin I. Hatch (2 operating units)

50.1% – Georgia Power Co.
30.0% – Oglethorpe Power Corp.
17.7% – Municipal Electric Authority of Georgia
2.2% – Dalton Utilities

Port Gibson, MS – Grand Gulf (1 operating unit)

90.0% – System Energy Resources, Inc. (Entergy)
10.0% – Cooperative Energy

Waterford, CT – Millstone (2 operating units)

Unit 2:
- 100% – Dominion Generation
Unit 3:
- 93.47% – Dominion
- 4.80% – Massachusetts Municipal Wholesale Electric Co.
- 0.68% – Caisse de dépôt et placement du Québec
- 0.67% – Enbridge Inc.
- 0.20% – Fonds de solidarité FTQ
- 0.16% – BC Investment Mgmt Corp.
- 0.02% – Univ. du Québec pension

Unit 3 has Canadian pension-fund minority owners

Units on the site

Unit 3 has institutional minority owners.

Distance between units: No data in FSARs and no way to figure out where Unit 2 is on the map. Unit 3 is the big dome, and Unit 2 is on of the circle-shaped structures surrounding it, but there are too much options and all have different distance.

Shared facilities: A lot of shared systems and components . Click this link (3.1.2.5 Sharing of Structures, Systems, and Components).

Ownership history

Unit 2: Bought by Dominion in 2001 along with Unit 1.

Unit 3: From construction originally owned by Dominion, MMWEC and CVPS. Last one was a conventional Vermont investor-owned utility holding with a 1.7303% minority ownership (Exactly the sum of minor shareholder pension funds). In 2011-2012 transaction, CVPS merged with Gaz Métro Limited Partnership, and became Green Montain Power Corporation. In 2012 NRC approved transfer of CVPS's stake from the new entity to institutional investors.

Why sell? Too minor share and too much responsibilities. Gaz metro wanted CVPS' electrical utilities, nit nuclear. After transaction they needed cash.

Why these investors? Because Gaz metro is centered in quebec and 3/5 new owners are based in quebec (probably connections). Left-overs were sold to other institutionals.

Scriba, NY – Nine Mile Point (2 operating units)

Unit 1:
- 100% – Constellation
Unit 2:
- 82.0% – Constellation
- 18.0% – Long Island Power Authority

Same site, different owners per unit

Units on the site

Unit 2 has an 18% public-power minority owner that Unit 1 doesn't.

Distance between units: 274 m center-to-center

Shared facilities: Sanitary waste treatment plant. (1.2.10.10)

Ownership history

Unit 1: Originally fully owned by Niagara Mohawk, but the ownership was bought in 2000-2001 as part of the same transaction.

Unit 2: Originally (1975) the split of ownership was:

41% – Niagara Mohawk
18% – NYSEG
14% – Rochester Gas & Electric
9% – Central Hudson Gas & Electric

In one transaction (2000 - 2001) Constellation Energy bought all of shares form previous for owners and got 82% on Unit 2. LIPA was an original owner, which changed its legal identity from LILCO around 1998.

Louisa County, VA – North Anna (2 operating units)

88.4% – Virginia Electric & Power Co. (Dominion)
11.6% – Old Dominion Electric Coop.

Wintersburg, AZ – Palo Verde (3 operating units)

29.1% – Arizona Public Service
17.5-25.4% – Salt River Project
15.8% – El Paso Electric
15.8% – Southern California Edison
2.3-10.2% – PNM Resources
9.66% – LADWP
0.38% – Imperial Irrigation Dist.
<0.3% each – 8 Southern California cities (Riverside, Vernon, Burbank, Glendale, Pasadena, Azusa, Banning, Colton)

Largest US plant by capacity
11+ owners incl. 8 CA municipal utilities

Delta, PA – Peach Bottom (2 operating units)

50.0% – Constellation Energy Generation, LLC
50.0% – PSEG Nuclear, LLC

Cordova, IL – Quad Cities (2 operating units)

75.0% – Constellation Energy Generation, LLC
25.0% – MidAmerican Energy Co. (Berkshire Hathaway)

Hancocks Bridge, NJ – Salem (2 operating units)

57.41% – PSEG Nuclear, LLC
42.59% – Constellation Energy Generation Co. LLC

Seabrook, NH – Seabrook (1 operating unit)

88.23% – NextEra Energy Resources
11.59% – Massachusetts Municipal Wholesale Electric Co.
0.10% – City of Taunton MA
0.08% – Town of Hudson MA

Bay City, TX – South Texas Project (2 operating units)

44.0% – Constellation Energy Generation, LLC
40.0% – CPS Energy (San Antonio)
16.0% – Austin Energy

Jensen Beach, FL – St. Lucie (2 operating units)

Unit 1:
- 100% – NextEra Energy
Unit 2:
- 85.1% – NextEra Energy
- 8.81% – Florida Municipal Power Agency
- 6.09% – Orlando Utilities Commission

Same site, different owners per unit

Units on the site

Unit 2 brought in two Florida public-power minority partners that Unit 1 never had.

Distance between units: 95-100 m center-to-center

Shared facilities: A lot of shared systems and components . Click this link (1.2.4 SHARED SYSTEMS AND INTERCONNECTIONS BETWEEN UNIT 1 AND UNIT 2).

Ownership history

Unit 1: Ownership structure never changed.

Unit 2: The structure haven't changed from 1983. Eventually, FPL was to be sole owner, but a coalition of 20 Florida cities intervened, which led to antimonopolistic lawsuit against FPL and led to FMPA buying their share in St. Lucie in February 1982 (lawsuit started in 1974). OUC bought shares in multiple energy plants in 1977 (Crystal River Unit 3), 1982 (Lakeland Electric's McIntosh Unit 3) and 1983 (St. Lucie Unit 2).