← All thesesCEGNeutralMedium convictionMonday 24 August 2026עברית

Constellation Energy

America's biggest owner of nuclear power stations, selling their round-the-clock, carbon-free electricity to tech companies on contracts of up to twenty years.

Our viewNeutral Medium conviction
The scores
The profile · 1-4
Growth3/4 ↑

TTM revenue growth sits almost exactly at the three-peer median, though it is driven by the Calpine consolidation rather than organic expansion.

Business quality3/4 →

Scarce, licensed nuclear capacity backs real pricing power, but behind-the-meter self-supply is a genuine substitute for the grid-connected PPA model this depends on.

Financial position3/4 ↓

Investment-grade ratings and $7.4B of liquidity at year-end, but total debt has nearly tripled in six months funding Calpine and free cash flow is negative.

Execution record4/4 ↑

A fourth consecutive year of exceeding guidance midpoint, plus two guidance raises in 2026 alone, through the largest acquisition in the company's history.

Per share capture3/4 →

The Calpine shares were real, one-time dilution funding a genuine asset; the June 2026 secondary itself added no incremental dilution and funded a buyback.

Potential3/4 ↑

The broadest signed demand pipeline in this coverage, but the prize is deliberately uncomposed and most of the newest batch remains unnamed.

Risk profile3/4 →

Investment-grade ratings and diversified counterparties cushion real, correlated risk from PJM's cost-allocation reform, rising leverage and the 2027 lock-up unlock.

Valuation2/4 →

A real premium to Constellation's own five-year history, on a cohort too thin (one to three comparable peers per metric) to move the score.

Evidence quality3/4 →

Central claims rest on primary filings and the call, cross-checked against independent EIA/AGA/Cleanview data, though the cohort is thin and one margin reading looks off.

The Verdict

We rate Constellation neutral. It runs America's largest fleet of nuclear power stations and sells their round-the-clock, carbon-free power to tech companies on long contracts, the broadest set of signed data-centre deals among the power companies we cover, so the business is solid. The price already knows that: it costs more per dollar of profit than in its own recent years, while debt nearly tripled to buy Calpine. So it is full, not cheap. The view hinges on new deals with named buyers arriving, the Three Mile Island restart staying on time and a proposed grid rule leaving existing plants alone.

The long caseData centres want round-the-clock power faster than grids can add it, and Constellation's nuclear plants sell it; new contracts must keep coming without grid rule changes hurting them.

The evidence under this - 9 claims
C01facthigh confidence
Constellation Energy Corporation acquired all outstanding equity of Calpine Corporation on January 7, 2026 for a purchase price of approximately $22 billion (50 million newly issued Constellation shares plus approximately $4.5 billion in cash). Following the merger, Constellation is the largest private-sector power producer in the world and the nation's largest producer of clean and reliable energy, with 55 GWs of capacity from nuclear, natural gas, geothermal, hydro, wind and solar facilities, providing about 10% of the nation's clean energy and serving approximately 2.5 million customer accounts nationwide.
historical · as disclosed in the FY2025 10-K, reflecting the 2026-01-07 closewritten 2026-08-24
C04facthigh confidence
In September 2024, Constellation executed a 20-year PPA with Microsoft to support the restart of Three Mile Island Unit 1, renamed the Crane Clean Energy Center (approximately 835 MW of emissions-free capacity once operational). In November 2025, the DOE Office of Energy Dominance Financing issued a guarantee for up to $1.0 billion for an unsecured loan (37.5 basis points over comparable Treasuries, maturing October 2055) to support the restart. As of the Q2 2026 print (2026-08-06), FERC granted a waiver allowing transfer of Capacity Interconnection Rights to Crane and the NRC approved a fuel license amendment request, both clearing regulatory hurdles toward a targeted 2027 restart.
against this

The restart remains subject to further permitting and construction milestones beyond the two clearances disclosed with the Q2 2026 print, so a 2027 restart date is management's own targeted timeline rather than a settled fact; delays to comparable large nuclear restarts have occurred industry-wide in the past.

current state · 2026-08-06written 2026-08-24
C05facthigh confidence
In June 2025, Constellation signed a 20-year PPA with Meta Platforms, Inc. for the output of the Clinton Clean Energy Center (approximately 1,092 MW net capacity), beginning June 2027 as the Illinois ZEC program that currently supports Clinton expires. The agreement expands Clinton's output by 30 MW through plant uprates expected to be complete around 2029 and supports Clinton's relicensing and continued operation for another two decades.
historical · signed 2025-06written 2026-08-24
C06facthigh confidence
Announced alongside the FY2025 results (2026-02-24), Constellation's Calpine LLC subsidiary signed a 380 MW agreement with Dallas-based CyrusOne to connect and serve a new data center adjacent to the Freestone Energy Center in Texas, plus an exclusive agreement to provide the same for a Phase 2 expansion of a further 380 MW; management stated these agreements are 'in addition to the 400 MW agreements announced in the second half of last year,' a separate, earlier tranche not further quantified in the sources read for this thesis.
historical · 2026-02-24written 2026-08-24
C07management claimmedium confidence
With the Q2 2026 print (2026-08-06), Constellation disclosed signing an additional 920 MW of long-term (15-20 year) power purchase agreements with 'a diverse set of investment grade customers,' deliveries beginning 2029 through 2032. Among these, a 176 MW agreement with Walmart Inc. - Walmart's first-ever nuclear PPA - was named specifically: approximately 176 MW of wholesale supply including a 30 MW capacity expansion at the Dresden Clean Energy Center, structured as two 15-year terms beginning in 2029 and 2030.
against this

Only Walmart (176 MW of the 920 MW total) is named; the remaining roughly 744 MW is described only as 'a diverse set of investment grade customers' with no per-customer volume or term disclosed, and management explicitly declined on the earnings call to disclose specific pricing or customer identity, citing customer sensitivity - so the breadth of the demand pipeline beyond Walmart cannot be independently verified from what has been disclosed.

current state · 2026-08-06written 2026-08-24
C18facthigh confidence
At the FY2026 Adjusted Operating Earnings guidance midpoint ($12.00/share) and the research pack's reference price ($272.88), the stock implies a forward multiple of approximately 22.7x. TTM GAAP P/E is 26.52x against a prior-fiscal-years median of 21.04x - a real premium to Constellation's own recent history, per the research pack's market-tier valuation time series.
current state · 2026-08-24written 2026-08-24
C13facthigh confidence
Balance sheet, 2026-06-30 versus 2025-12-31: total assets $98,253M versus $57,249M; goodwill $11,527M versus $420M; total debt (short-term borrowings plus current and long-term debt) approximately $24,700M versus approximately $8,992M; cash and restricted cash $1,077M at period end. H1 2026 capital expenditures were $2,521M versus $1,573M in H1 2025, and the Calpine acquisition itself used $2,537M of cash, net. Average diluted shares outstanding rose to 360M in Q2 2026 from 314M in Q2 2025, primarily reflecting the 50 million shares issued as Calpine merger consideration.
current state · 2026-06-30written 2026-08-24
C08facthigh confidence
On January 16, 2026, the National Energy Dominance Council, with support from PJM-territory governors, urged PJM to file tariff revisions at FERC addressing reliability and pricing within its capacity auctions, including a Reliability Backstop Auction to procure new out-of-market capacity and specifically 'allocating costs to data centers through the Reliability Backstop Auctions.' Separately, in December 2025, FERC found PJM's existing tariff 'unjust and unreasonable' for lacking clarity on rates and terms for serving co-located load.
historical · 2025-12 (FERC show-cause order) and 2026-01-16 (NEDC letter to PJM)written 2026-08-24
C19facthigh confidence
On the filed-competitor cohort (VST, NRG, TLN): EV/EBITDA subject 16.8x, but the cohort comparison is unavailable - only NRG reconciles cleanly enough to compare after VST and TLN are withheld for margin-reconciliation gaps, below the pack's 2-member floor. EV/Sales is 3.9x against a three-peer median of 4.1x (rank 2 of 4, near median). P/E is 26.5x against a two-peer median of 26.15x (VST and NRG comparable; TLN not meaningful - near median). P/FCF is 317.1x against a three-peer median of 33.4x (rank 4 of 4), driven by Constellation's currently near-zero free cash flow from heavy Calpine-integration and growth capex rather than a genuine valuation signal. P/B is 3.0x (rank 1 of 4, cheapest of the cohort), which is more plausibly explained by the fresh Calpine purchase-accounting step-up to book equity than by a genuine value signal.
current state · 2026-08-24written 2026-08-24
01

The company

A data centre needs electricity every hour of every day, and big tech buyers want it free of carbon. Nuclear supplies about 19% of America's electricity, the largest carbon-free source that runs around the clock, and Constellation owns more of it than anyone.

The January purchase of Calpine, for about $22B, added about 23 gigawatts, mostly gas plants, plus California's largest geothermal complex and a retail business. A buyer's alternative is paying the day's market price for power, or building its own plant.

The evidence under this - 3 claims
C01facthigh confidence
Constellation Energy Corporation acquired all outstanding equity of Calpine Corporation on January 7, 2026 for a purchase price of approximately $22 billion (50 million newly issued Constellation shares plus approximately $4.5 billion in cash). Following the merger, Constellation is the largest private-sector power producer in the world and the nation's largest producer of clean and reliable energy, with 55 GWs of capacity from nuclear, natural gas, geothermal, hydro, wind and solar facilities, providing about 10% of the nation's clean energy and serving approximately 2.5 million customer accounts nationwide.
historical · as disclosed in the FY2025 10-K, reflecting the 2026-01-07 closewritten 2026-08-24
C02facthigh confidence
After considering divestitures connected with regulatory approvals (the DOJ resolution was the final regulatory clearance), the Calpine merger added approximately 23 GWs across 72 generation and battery storage assets: natural gas (approximately 21 GW, primarily combined-cycle), the Geysers geothermal complex (13 operating plants, approximately 730 MW, the largest single renewable energy asset in California), and approximately 800 MW of battery storage, plus a competitive retail platform adding approximately 62 TWhs of annual load and approximately 2,500 employees.
historical · as disclosed in the FY2025 10-Kwritten 2026-08-24
C21facthigh confidence
Nuclear energy supplied about 19% of total US electricity generation, the largest single source of carbon-free power in the country, per the US Energy Information Administration - an independent confirmation that the licensed nuclear capacity Constellation's fleet concentrates is a genuinely scarce national input, not merely a company characterization.
current state · 2026-08-24written 2026-08-24

How it makes money

It sells the power its plants generate, into regional markets and, increasingly, under long contracts at a fixed price. Those contracts are the story: 15 to 20 years of income from investment-grade buyers. It also sells electricity and gas directly to about 2.5 million customer accounts.

The evidence under this - 3 claims
C03facthigh confidence
Constellation reports six reportable segments since the Calpine close: Mid-Atlantic, Midwest, New York, ERCOT, Other Power Regions and Calpine. A separate, disclosed 'Other' bucket - unrealized gains/losses on economic hedging activity, wholesale/retail natural gas sales not tied to the Calpine segment, and amortization of acquired commodity contracts - is not allocated to any segment; for Q2 2026, the six reportable segments totaled $7,244M of operating revenue against $7,504M of total consolidated revenue, with the $260M difference (and a further $735M of purchased power/fuel) itemized in the 10-Q's own segment note as 'activities not allocated to a segment.'
current state · 2026-06-30written 2026-08-24
C07management claimmedium confidence
With the Q2 2026 print (2026-08-06), Constellation disclosed signing an additional 920 MW of long-term (15-20 year) power purchase agreements with 'a diverse set of investment grade customers,' deliveries beginning 2029 through 2032. Among these, a 176 MW agreement with Walmart Inc. - Walmart's first-ever nuclear PPA - was named specifically: approximately 176 MW of wholesale supply including a 30 MW capacity expansion at the Dresden Clean Energy Center, structured as two 15-year terms beginning in 2029 and 2030.
against this

Only Walmart (176 MW of the 920 MW total) is named; the remaining roughly 744 MW is described only as 'a diverse set of investment grade customers' with no per-customer volume or term disclosed, and management explicitly declined on the earnings call to disclose specific pricing or customer identity, citing customer sensitivity - so the breadth of the demand pipeline beyond Walmart cannot be independently verified from what has been disclosed.

current state · 2026-08-06written 2026-08-24
C01facthigh confidence
Constellation Energy Corporation acquired all outstanding equity of Calpine Corporation on January 7, 2026 for a purchase price of approximately $22 billion (50 million newly issued Constellation shares plus approximately $4.5 billion in cash). Following the merger, Constellation is the largest private-sector power producer in the world and the nation's largest producer of clean and reliable energy, with 55 GWs of capacity from nuclear, natural gas, geothermal, hydro, wind and solar facilities, providing about 10% of the nation's clean energy and serving approximately 2.5 million customer accounts nationwide.
historical · as disclosed in the FY2025 10-K, reflecting the 2026-01-07 closewritten 2026-08-24
Where the money comes from, stream by stream
StreamShare of sales (H1 2026)How it earns it
Power and power-related59.0%Electricity from its nuclear, gas and renewable plants, sold wholesale and to retail and business customers, including state clean-power programme payments.
Other revenue sources (derivatives, leases)28.1%Energy contracts accounted for as derivatives or leases, plus amortisation of Calpine's acquired contracts; moves with hedge marks and commodity prices.
Natural gas6.8%Gas sold to wholesale and retail customers, largely through the competitive retail business.
Capacity4.4%Payments for keeping plants available, from grid-operator capacity auctions and bilateral contracts.
Other energy products1.6%Other energy-related products and sustainability services sold to business customers.

Who runs it

Joe Dominguez has run Constellation since it split from Exelon in 2022, and has beaten his own profit forecast every year since. Shane Smith took over the books when Calpine was bought. Insiders own under 1% of the company, so they gain little directly from the share price. Most of the bonus rides on yearly profit, and most of the share awards on cash generated before growth spending and on how the stock does against rivals; nothing rewards return on the money invested.

The evidence under this - 4 claims
C30facthigh confidence
Joseph Dominguez has been president and chief executive since the February 2022 spin-off from Exelon, after running Exelon Generation and ComEd. Shane Smith became chief financial officer in January 2026 from treasurer; Daniel Eggers, chief financial officer from 2022 to 2026, now leads finance and the data-economy business; Andrew Novotny, Calpine's chief executive, runs power operations.
current state · 2026-02-24written 2026-10-04
C31facthigh confidence
As of March 2, 2026 the 21 directors and executive officers as a group beneficially owned 1,140,643 shares, under 1% of the 313,309,685 outstanding (about 0.4%); director Robert Lawless held 161,967 and Joseph Dominguez 157,074. Vanguard (11.7%), BlackRock (7.2%), ECP ControlCo, the Calpine seller (7.0% in January 2026), State Street (5.7%) and Capital International (5.5%) held above 5%.
current state · 2026-03-02written 2026-10-04
C32facthigh confidence
The 2025 annual bonus paid 70% on adjusted operating earnings against a target set at the guidance midpoint and 30% on fleet capacity factor, dispatch match, renewable capture and customer satisfaction; it paid 112.69%. Long-term awards are one-third time-vested shares and two-thirds performance shares on free cash flow before growth (67%) and three-year relative return (33%), cut if credit ratings fall; 2023-2025 paid 200%.
against this

Free cash flow before growth excludes growth spending by its name, so the Crane restart and uprates cost the plan nothing until they earn; and the free-cash-flow goals for the 2024-2026 and 2025-2027 awards were raised for Calpine without being disclosed, so how stretching they are cannot be checked until 2027.

historical · FY2025 pay planwritten 2026-10-04
C11facthigh confidence
Q2 2026: GAAP net income attributable to common shareholders of $513M ($1.42 basic/diluted EPS); Adjusted (non-GAAP) Operating Earnings of $920M ($2.55/share); effective tax rate 44.2%. Constellation raised its full-year 2026 Adjusted Operating Earnings guidance to $11.50-$12.50/share, up from the $11.00-$12.00 range issued with the FY2025 results (2026-02-24) and affirmed unchanged at Q1 2026 (2026-05-11). The CFO noted the fourth consecutive year Constellation delivered full-year earnings exceeding the midpoint of its own guidance range, referring to FY2025.
current state · 2026-08-06written 2026-08-24
02

Why it wins, and who could beat it

Why customers come back

The scarce thing is licensed, working nuclear capacity, and nobody can build comparable new capacity this decade. That scarcity is why Microsoft signed for 20 years to restart a closed reactor at Three Mile Island, and Meta for 20 years of a whole plant's output from June 2027.

The evidence under this - 3 claims
C21facthigh confidence
Nuclear energy supplied about 19% of total US electricity generation, the largest single source of carbon-free power in the country, per the US Energy Information Administration - an independent confirmation that the licensed nuclear capacity Constellation's fleet concentrates is a genuinely scarce national input, not merely a company characterization.
current state · 2026-08-24written 2026-08-24
C04facthigh confidence
In September 2024, Constellation executed a 20-year PPA with Microsoft to support the restart of Three Mile Island Unit 1, renamed the Crane Clean Energy Center (approximately 835 MW of emissions-free capacity once operational). In November 2025, the DOE Office of Energy Dominance Financing issued a guarantee for up to $1.0 billion for an unsecured loan (37.5 basis points over comparable Treasuries, maturing October 2055) to support the restart. As of the Q2 2026 print (2026-08-06), FERC granted a waiver allowing transfer of Capacity Interconnection Rights to Crane and the NRC approved a fuel license amendment request, both clearing regulatory hurdles toward a targeted 2027 restart.
against this

The restart remains subject to further permitting and construction milestones beyond the two clearances disclosed with the Q2 2026 print, so a 2027 restart date is management's own targeted timeline rather than a settled fact; delays to comparable large nuclear restarts have occurred industry-wide in the past.

current state · 2026-08-06written 2026-08-24
C05facthigh confidence
In June 2025, Constellation signed a 20-year PPA with Meta Platforms, Inc. for the output of the Clinton Clean Energy Center (approximately 1,092 MW net capacity), beginning June 2027 as the Illinois ZEC program that currently supports Clinton expires. The agreement expands Clinton's output by 30 MW through plant uprates expected to be complete around 2029 and supports Clinton's relicensing and continued operation for another two decades.
historical · signed 2025-06written 2026-08-24

The threat

The biggest buyers may skip the grid. Nearly every hyperscaler is now building power plants on its own sites, and OpenAI and Anthropic alone have leased more than 10 gigawatts of it: demand that never reaches a seller like Constellation. Rival generators chase the same deals, and management will not name the customers or prices in its current talks.

The evidence under this - 2 claims
C23factmedium confidence
Behind-the-meter, off-grid data-center power is scaling nationally: nearly every hyperscaler is now pursuing behind-the-meter projects, and OpenAI and Anthropic alone have signed leases for more than 10 GW of behind-the-meter power (data reused from this repo's other power-sector theses, describing the same national trend relevant to grid-connected PPA demand).
against this

Much of the reported behind-the-meter build-out still runs on natural gas rather than nuclear, and depends on sites where a buyer can secure its own generation and fuel supply fast enough - a real substitute for the intermediary PPA path, but not a substitute for the specific 24/7 carbon-free attribute nuclear PPAs like Constellation's uniquely offer.

current state · 2026-08-24written 2026-08-24
C09management claimmedium confidence
On the Q2 2026 earnings call, management described being engaged in a confidential bilateral contracting process with customers to add megawatts 'in combination with our existing capabilities,' referencing a 6 GW PJM reliability shortfall figure and '5 gigawatts' of newly eligible capacity highlighted on the prior call, while declining to disclose specific pricing or customer identity 'to protect customer sensitivity.'
against this

Management's repeated refusal to disclose pricing or counterparty detail across two consecutive calls means the market cannot independently verify how much of the 6 GW/5 GW opportunity Constellation is actually converting versus merely discussing.

forwardwritten 2026-08-24

The rivals: SPCX, NRG, VST, TLN, and 1 more that is private, in-house or listed abroad.

Who else does this, rival by rival
TickerRivalHow far alongPriced against it
SPCXHyperscalers and data-center operators building their own behind-the-meter gas generation (xAI, and others tracked industry-wide) rather than buying grid-connected nuclear power through a long-term PPAPriced against it: Different productOn saleDifferent product
Not listedOther-basin and other-fuel generation growth (new gas-fired capacity in other RTOs, or other nuclear operators extending their own licenses) competing for the same data-center demand poolPriced against it: Not listedOn saleNot listed
NRGNRG EnergyPriced against it: YesOn saleYes
VSTVistraPriced against it: YesOn saleYes
TLNTalen EnergyPriced against it: YesOn saleYes
03

How big it could get

How big this could get

The market is data-centre electricity signed on long contracts. Government forecasts have data-centre servers rising from about 7% of American commercial buildings' electricity in 2025 to between 22% and 33% by 2050. Against that, Constellation has named about 2,135 megawatts of deals since September 2024. Nobody publishes what share of the whole any one seller wins.

The evidence under this - 4 claims
C22facthigh confidence
Independent EIA data projects US data-center server electricity use rising from roughly 7% of commercial-building electricity consumption in 2025 toward 22%-33% by 2050, and separately projects commercial-sector power demand (largely data-center-driven) growing roughly 3-5% a year through 2026 - a national demand base independent of, and external to, Constellation's own disclosures.
current state · 2026-08-24written 2026-08-24
C04facthigh confidence
In September 2024, Constellation executed a 20-year PPA with Microsoft to support the restart of Three Mile Island Unit 1, renamed the Crane Clean Energy Center (approximately 835 MW of emissions-free capacity once operational). In November 2025, the DOE Office of Energy Dominance Financing issued a guarantee for up to $1.0 billion for an unsecured loan (37.5 basis points over comparable Treasuries, maturing October 2055) to support the restart. As of the Q2 2026 print (2026-08-06), FERC granted a waiver allowing transfer of Capacity Interconnection Rights to Crane and the NRC approved a fuel license amendment request, both clearing regulatory hurdles toward a targeted 2027 restart.
against this

The restart remains subject to further permitting and construction milestones beyond the two clearances disclosed with the Q2 2026 print, so a 2027 restart date is management's own targeted timeline rather than a settled fact; delays to comparable large nuclear restarts have occurred industry-wide in the past.

current state · 2026-08-06written 2026-08-24
C06facthigh confidence
Announced alongside the FY2025 results (2026-02-24), Constellation's Calpine LLC subsidiary signed a 380 MW agreement with Dallas-based CyrusOne to connect and serve a new data center adjacent to the Freestone Energy Center in Texas, plus an exclusive agreement to provide the same for a Phase 2 expansion of a further 380 MW; management stated these agreements are 'in addition to the 400 MW agreements announced in the second half of last year,' a separate, earlier tranche not further quantified in the sources read for this thesis.
historical · 2026-02-24written 2026-08-24
C07management claimmedium confidence
With the Q2 2026 print (2026-08-06), Constellation disclosed signing an additional 920 MW of long-term (15-20 year) power purchase agreements with 'a diverse set of investment grade customers,' deliveries beginning 2029 through 2032. Among these, a 176 MW agreement with Walmart Inc. - Walmart's first-ever nuclear PPA - was named specifically: approximately 176 MW of wholesale supply including a 30 MW capacity expansion at the Dresden Clean Energy Center, structured as two 15-year terms beginning in 2029 and 2030.
against this

Only Walmart (176 MW of the 920 MW total) is named; the remaining roughly 744 MW is described only as 'a diverse set of investment grade customers' with no per-customer volume or term disclosed, and management explicitly declined on the earnings call to disclose specific pricing or customer identity, citing customer sensitivity - so the breadth of the demand pipeline beyond Walmart cannot be independently verified from what has been disclosed.

current state · 2026-08-06written 2026-08-24

Who has signed

Microsoft signed for about 835 megawatts for 20 years, and Meta for a whole plant, about 1,092 megawatts, for 20 years from June 2027. CyrusOne signed for 380 megawatts in Texas. In August another 920 megawatts arrived, of which only Walmart's 176 is named.

The evidence under this - 4 claims
C04facthigh confidence
In September 2024, Constellation executed a 20-year PPA with Microsoft to support the restart of Three Mile Island Unit 1, renamed the Crane Clean Energy Center (approximately 835 MW of emissions-free capacity once operational). In November 2025, the DOE Office of Energy Dominance Financing issued a guarantee for up to $1.0 billion for an unsecured loan (37.5 basis points over comparable Treasuries, maturing October 2055) to support the restart. As of the Q2 2026 print (2026-08-06), FERC granted a waiver allowing transfer of Capacity Interconnection Rights to Crane and the NRC approved a fuel license amendment request, both clearing regulatory hurdles toward a targeted 2027 restart.
against this

The restart remains subject to further permitting and construction milestones beyond the two clearances disclosed with the Q2 2026 print, so a 2027 restart date is management's own targeted timeline rather than a settled fact; delays to comparable large nuclear restarts have occurred industry-wide in the past.

current state · 2026-08-06written 2026-08-24
C05facthigh confidence
In June 2025, Constellation signed a 20-year PPA with Meta Platforms, Inc. for the output of the Clinton Clean Energy Center (approximately 1,092 MW net capacity), beginning June 2027 as the Illinois ZEC program that currently supports Clinton expires. The agreement expands Clinton's output by 30 MW through plant uprates expected to be complete around 2029 and supports Clinton's relicensing and continued operation for another two decades.
historical · signed 2025-06written 2026-08-24
C06facthigh confidence
Announced alongside the FY2025 results (2026-02-24), Constellation's Calpine LLC subsidiary signed a 380 MW agreement with Dallas-based CyrusOne to connect and serve a new data center adjacent to the Freestone Energy Center in Texas, plus an exclusive agreement to provide the same for a Phase 2 expansion of a further 380 MW; management stated these agreements are 'in addition to the 400 MW agreements announced in the second half of last year,' a separate, earlier tranche not further quantified in the sources read for this thesis.
historical · 2026-02-24written 2026-08-24
C07management claimmedium confidence
With the Q2 2026 print (2026-08-06), Constellation disclosed signing an additional 920 MW of long-term (15-20 year) power purchase agreements with 'a diverse set of investment grade customers,' deliveries beginning 2029 through 2032. Among these, a 176 MW agreement with Walmart Inc. - Walmart's first-ever nuclear PPA - was named specifically: approximately 176 MW of wholesale supply including a 30 MW capacity expansion at the Dresden Clean Energy Center, structured as two 15-year terms beginning in 2029 and 2030.
against this

Only Walmart (176 MW of the 920 MW total) is named; the remaining roughly 744 MW is described only as 'a diverse set of investment grade customers' with no per-customer volume or term disclosed, and management explicitly declined on the earnings call to disclose specific pricing or customer identity, citing customer sensitivity - so the breadth of the demand pipeline beyond Walmart cannot be independently verified from what has been disclosed.

current state · 2026-08-06written 2026-08-24
04

The results

The numbers

Is it growing?Fast

Sales grew 26% over the twelve months to Jun 2026, faster than the 8.3% in the year to Dec 2025.

Dec 2021: $19.6BDec 2022: $24.4BDec 2023: $24.9BDec 2024: $23.6BDec 2025: $25.5B12 mo to Jun 2026: $31.3B$19.6B$31.3B
Is it profitable?Healthy

Operating margin is 15%, up from 6.5% in the year to Dec 2023.

Dec 2021: −1.8%Dec 2022: 2.0%Dec 2023: 6.5%Dec 2024: 18%Dec 2025: 12%12 mo to Jun 2026: 15%−1.8%15%
How steady is it?Uneven

Yearly sales growth has ranged from −5.4% to +24% over the last 5 years, with sales falling in 1 of them.

Dec 2021: +12%Dec 2022: +24%Dec 2023: +2.0%Dec 2024: −5.4%Dec 2025: +8.3%+12%+8.3%
Does it earn good returns?Low

Each dollar put into the business earns 7.9% a year after tax, about where it was (5.7%) in the year to Dec 2023.

Dec 2023: 5.7%Dec 2024: 17%Dec 2025: 9.1%12 mo to Jun 2026: 7.9%5.7%7.9%
Is it making cash?Thin

It turned 1.0% of sales into free cash, $309M over the last twelve months.

Dec 2021: −$2.67BDec 2022: −$4.04BDec 2023: −$7.72BDec 2024: −$5.03BDec 2025: $1.29B12 mo to Jun 2026: $309M−$2.67B$309M
Is the balance sheet safe?Strained

It owes $24.0B more than the cash it holds, about 5.7 years of the cash its operations bring in.

Dec 2021: −$7.37BDec 2022: −$5.35BDec 2023: −$8.89BDec 2024: −$5.39BDec 2025: −$5.35B12 mo to Jun 2026: −$24.0B−$7.37B−$24.0B
Are shares being diluted?Creeping

The share count rose 9.4% in 3.5 years.

Dec 2022: 329MDec 2023: 324MDec 2024: 315MDec 2025: 314M12 mo to Jun 2026: 360M329M360M
All the numbers

Filed figures from the company's 10-K and 10-Q, read 2026-10-04. Fiscal years end in December.

Dec 2021Dec 2022Dec 2023Dec 2024Dec 202512 mo to Jun 2026
Size and growth
Sales$19.6B$24.4B$24.9B$23.6B$25.5B$31.3B
Sales growth+12%+24%+2.0%−5.4%+8.3%+26%
Profit
Operating margin−1.8%2.0%6.5%18%12%15%
Net margin−1.0%−0.7%6.5%16%9.1%11%
What growth costs, per sales dollar
Pay in shares0.2%0.5%0.7%1.4%1.5%-
Capital spending6.8%6.9%9.7%11%12%12%
Cash
Cash from operations−$1.34B−$2.35B−$5.30B−$2.46B$4.24B$4.21B
Free cash flow−$2.67B−$4.04B−$7.72B−$5.03B$1.29B$309M
Balance sheet
Cash and short-term investments$504M$422M$368M$3.02B$3.64B$697M
Debt$7.88B$5.77B$9.26B$8.41B$8.99B$24.7B
Net cash−$7.37B−$5.35B−$8.89B−$5.39B−$5.35B−$24.0B
Returns and shares
Return on capital--5.7%17%9.1%7.9%
Shares (diluted)0329M324M315M314M360M

What growth costs

Constellation grows by buying power plants and spending on its own, not by selling harder, so the usual cost lines tell little. Its spending on plants has taken a larger share of every sales dollar each year, while profit margins have swung with power prices and trading gains. Whether growing makes it more or less profitable cannot be read from the costs yet.

The evidence under this - 2 claims
C28facthigh confidence
Per sales dollar, capital spending rose from 9.7 cents in 2023 to 10.9 in 2024, 11.5 in 2025 and 12.5 over the four quarters to June 2026, and stock pay from 0.7 to 1.4 and 1.5 cents; operating margin went 6.5%, 18.5%, 12.1% and 14.7%. The 10-K has no research or selling line. Operating cash flow was negative in 2023 and 2024 because $7,340M and $10,217M of receivable-sale collections are classified as investing.
historical · FY2023 to the four quarters to June 2026written 2026-10-04
C29inferencemedium confidence
Growth here is bought or built rather than sold: margins move with power prices, hedge marks and the nuclear tax credit rather than with volume, while capital spending per sales dollar has risen every year, so whether growth widens the margin cannot be read from the cost lines.
derivedC28's per-sales-dollar capital spending and stock pay against operating margins that swing with no matching cost trend; C12's hedge marks; C01 and C02 for the acquired growth
historical · FY2023 to the four quarters to June 2026written 2026-10-04

The last report (6 Aug)

Quarter ended June 2026, filed figures.

23%
Sales growth
against the same quarter a year earlier
-32.5%
Growth from the quarter before
against 83.1% the quarter before that
8¢
Operating profit
per dollar of sales

The second quarter of 2026 shows why the headline profit is hard to read. Reported earnings were $1.42 a share, against $4.49 in the first quarter, because gains and losses on the company's hedges pass straight through reported profit. On management's adjusted measure, which strips those out, it earned $2.55.

The number that mattered was the forecast. Management raised its full-year adjusted range to $11.50 to $12.50 a share, from $11.00 to $12.00. The shares fell just 1.5% on the day.

What it did to the thesisIt backed the case that the nuclear fleet earns steadily and management keeps delivering, since it raised its forecast. It did not answer the open question behind the Neutral view: whether new long contracts keep arriving fast enough to justify a price with little room for a setback.

The quarter in detail

Sales growth from the previous quarter, filed figures.

Earnings per share $2.55 against $2.29 expected; $1.42 as filed, the gap being what the company adds back.

The evidence under this - 3 claims
C11facthigh confidence
Q2 2026: GAAP net income attributable to common shareholders of $513M ($1.42 basic/diluted EPS); Adjusted (non-GAAP) Operating Earnings of $920M ($2.55/share); effective tax rate 44.2%. Constellation raised its full-year 2026 Adjusted Operating Earnings guidance to $11.50-$12.50/share, up from the $11.00-$12.00 range issued with the FY2025 results (2026-02-24) and affirmed unchanged at Q1 2026 (2026-05-11). The CFO noted the fourth consecutive year Constellation delivered full-year earnings exceeding the midpoint of its own guidance range, referring to FY2025.
current state · 2026-08-06written 2026-08-24
C12facthigh confidence
Q1 2026: GAAP net income of $1,590M ($4.49/share diluted), up sharply from $118M ($0.38/share) in Q1 2025. The increase was driven substantially by unrealized gains on fair-value hedge adjustments ($721M, $2.03/share) and favorable decommissioning-related activities ($174M, $0.49/share), partially offset by Calpine merger and integration costs ($119M, $0.34/share) and amortization of acquired commodity contracts ($154M, $0.44/share). Adjusted (non-GAAP) Operating Earnings were $2.74/share, up from $2.14/share in Q1 2025.
against this

Roughly $895M of the swing between Q1 2026 and Q1 2025 GAAP net income traces to non-cash, unrealized hedge and decommissioning-remeasurement items rather than to operating performance - the same GAAP-versus-adjusted-earnings distortion this repo's other merchant-generator theses (VST, NRG, TLN) document, meaning the GAAP EPS print materially overstates the quarter's operating improvement on its own.

historical · Q1 2026written 2026-08-24
C26factmedium confidence
Of 12 trusted-source news items in the research window, only the June 1, 2026 secondary-offering announcement produced a measured, volume-confirmed negative reaction (-7.7%, 'strong'); the Q2 2026 earnings release itself (which included the raised guidance) drew only a mild -1.5% reaction, and an August 5, 2026 board-chairman-transition announcement (CEO Joseph Dominguez unaffected) drew -0.8%, both 'weak' and not volume-confirmed.
current state · 2026-08-24written 2026-08-24
What management did with the money

It paid for Calpine with 50 million new shares and about $4.5B in cash, and debt rose to about $24.7B from about $9.0B in six months. When Calpine's former owners sold 11 million shares in June, Constellation bought back about $558M of them itself.

The evidence under this - 3 claims
C01facthigh confidence
Constellation Energy Corporation acquired all outstanding equity of Calpine Corporation on January 7, 2026 for a purchase price of approximately $22 billion (50 million newly issued Constellation shares plus approximately $4.5 billion in cash). Following the merger, Constellation is the largest private-sector power producer in the world and the nation's largest producer of clean and reliable energy, with 55 GWs of capacity from nuclear, natural gas, geothermal, hydro, wind and solar facilities, providing about 10% of the nation's clean energy and serving approximately 2.5 million customer accounts nationwide.
historical · as disclosed in the FY2025 10-K, reflecting the 2026-01-07 closewritten 2026-08-24
C13facthigh confidence
Balance sheet, 2026-06-30 versus 2025-12-31: total assets $98,253M versus $57,249M; goodwill $11,527M versus $420M; total debt (short-term borrowings plus current and long-term debt) approximately $24,700M versus approximately $8,992M; cash and restricted cash $1,077M at period end. H1 2026 capital expenditures were $2,521M versus $1,573M in H1 2025, and the Calpine acquisition itself used $2,537M of cash, net. Average diluted shares outstanding rose to 360M in Q2 2026 from 314M in Q2 2025, primarily reflecting the 50 million shares issued as Calpine merger consideration.
current state · 2026-06-30written 2026-08-24
C15facthigh confidence
On June 1-2, 2026, Selling Shareholders (the legacy Calpine merger-consideration holders) sold 11,000,000 shares of Constellation common stock (plus up to a 1,350,000-share underwriter option) in an underwritten secondary offering; Constellation itself sold zero shares. Concurrently, Constellation repurchased approximately $558.0 million of stock directly from the underwriters at the offering price, under its existing share-repurchase program, leaving approximately $3.5 billion of remaining buyback authority. The 50 million Calpine merger-consideration shares carry a lock-up expiring June 30, 2026 for the first half and June 30, 2027 for the remaining half, so the June 2026 sale was an early, negotiated release of (part of) the first tranche.
against this

Despite the offering carrying zero net primary dilution (the Company sold no shares and repurchased a portion at the same price), the stock still fell 7.7% on the announcement, a measured, volume-relevant reaction - a real technical/supply-overhang cost distinct from actual dilution, and a pattern that could repeat when the remaining 25 million lock-up shares unlock in June 2027.

historical · 2026-06-01 to 2026-06-02written 2026-08-24
05

The price, and where we disagree

In short. Full. Constellation has a real advantage in nuclear power that big buyers sign long contracts for, but the price leaves little room for a setback: it pays for new deals that must keep arriving.

Share price
$272.88
close,
Company value for each $1 of sales
3.9
rivals' middle 4.1
Company value for each $1 of cash profit
14.3
its 6-year normal 11.0

The shares are about a third below their high of the past year. Two tests are close.

The September-quarter results on 9 November show whether the forecast rises again and whether any new buyer is named. And PJM, which runs the grid across the mid-Atlantic, is weighing rules that would charge new capacity costs to data centres, the very customers this story depends on.

The evidence under this - 4 claims
C24facthigh confidence
As of the research pack date, Constellation traded at $272.88, about 33.9% below its 252-day high of $412.70, 24.0% up the 52-week range; 20-day average volatility (high-to-low range) was 3.60%, in the Stable bucket (<5%); the stock sits above its 50-day moving average by 3.7% and below its 200-day moving average by 9.0%, with a 14-day RSI of 52.97 and a bearish MACD cross state.
current state · 2026-08-24written 2026-08-24
C11facthigh confidence
Q2 2026: GAAP net income attributable to common shareholders of $513M ($1.42 basic/diluted EPS); Adjusted (non-GAAP) Operating Earnings of $920M ($2.55/share); effective tax rate 44.2%. Constellation raised its full-year 2026 Adjusted Operating Earnings guidance to $11.50-$12.50/share, up from the $11.00-$12.00 range issued with the FY2025 results (2026-02-24) and affirmed unchanged at Q1 2026 (2026-05-11). The CFO noted the fourth consecutive year Constellation delivered full-year earnings exceeding the midpoint of its own guidance range, referring to FY2025.
current state · 2026-08-06written 2026-08-24
C07management claimmedium confidence
With the Q2 2026 print (2026-08-06), Constellation disclosed signing an additional 920 MW of long-term (15-20 year) power purchase agreements with 'a diverse set of investment grade customers,' deliveries beginning 2029 through 2032. Among these, a 176 MW agreement with Walmart Inc. - Walmart's first-ever nuclear PPA - was named specifically: approximately 176 MW of wholesale supply including a 30 MW capacity expansion at the Dresden Clean Energy Center, structured as two 15-year terms beginning in 2029 and 2030.
against this

Only Walmart (176 MW of the 920 MW total) is named; the remaining roughly 744 MW is described only as 'a diverse set of investment grade customers' with no per-customer volume or term disclosed, and management explicitly declined on the earnings call to disclose specific pricing or customer identity, citing customer sensitivity - so the breadth of the demand pipeline beyond Walmart cannot be independently verified from what has been disclosed.

current state · 2026-08-06written 2026-08-24
C08facthigh confidence
On January 16, 2026, the National Energy Dominance Council, with support from PJM-territory governors, urged PJM to file tariff revisions at FERC addressing reliability and pricing within its capacity auctions, including a Reliability Backstop Auction to procure new out-of-market capacity and specifically 'allocating costs to data centers through the Reliability Backstop Auctions.' Separately, in December 2025, FERC found PJM's existing tariff 'unjust and unreasonable' for lacking clarity on rates and terms for serving co-located load.
historical · 2025-12 (FERC show-cause order) and 2026-01-16 (NEDC letter to PJM)written 2026-08-24
How we read the multiple

Buyers pay about 26.5 times the last year's profit, against about 21 in Constellation's own recent years. On this year's forecast profit it is about 22.7. Against its rivals it sits near the middle.

The extra over its own past pays for the long contracts already signed. It holds only if new deals keep being named and the Three Mile Island reactor restarts in 2027 as planned.

Against its own history. Dearer than its own recent years. The signed contracts are genuinely new, so part of the higher price is earned rather than merely paid.

The evidence under this - 4 claims
C18facthigh confidence
At the FY2026 Adjusted Operating Earnings guidance midpoint ($12.00/share) and the research pack's reference price ($272.88), the stock implies a forward multiple of approximately 22.7x. TTM GAAP P/E is 26.52x against a prior-fiscal-years median of 21.04x - a real premium to Constellation's own recent history, per the research pack's market-tier valuation time series.
current state · 2026-08-24written 2026-08-24
C19facthigh confidence
On the filed-competitor cohort (VST, NRG, TLN): EV/EBITDA subject 16.8x, but the cohort comparison is unavailable - only NRG reconciles cleanly enough to compare after VST and TLN are withheld for margin-reconciliation gaps, below the pack's 2-member floor. EV/Sales is 3.9x against a three-peer median of 4.1x (rank 2 of 4, near median). P/E is 26.5x against a two-peer median of 26.15x (VST and NRG comparable; TLN not meaningful - near median). P/FCF is 317.1x against a three-peer median of 33.4x (rank 4 of 4), driven by Constellation's currently near-zero free cash flow from heavy Calpine-integration and growth capex rather than a genuine valuation signal. P/B is 3.0x (rank 1 of 4, cheapest of the cohort), which is more plausibly explained by the fresh Calpine purchase-accounting step-up to book equity than by a genuine value signal.
current state · 2026-08-24written 2026-08-24
C04facthigh confidence
In September 2024, Constellation executed a 20-year PPA with Microsoft to support the restart of Three Mile Island Unit 1, renamed the Crane Clean Energy Center (approximately 835 MW of emissions-free capacity once operational). In November 2025, the DOE Office of Energy Dominance Financing issued a guarantee for up to $1.0 billion for an unsecured loan (37.5 basis points over comparable Treasuries, maturing October 2055) to support the restart. As of the Q2 2026 print (2026-08-06), FERC granted a waiver allowing transfer of Capacity Interconnection Rights to Crane and the NRC approved a fuel license amendment request, both clearing regulatory hurdles toward a targeted 2027 restart.
against this

The restart remains subject to further permitting and construction milestones beyond the two clearances disclosed with the Q2 2026 print, so a 2027 restart date is management's own targeted timeline rather than a settled fact; delays to comparable large nuclear restarts have occurred industry-wide in the past.

current state · 2026-08-06written 2026-08-24
C07management claimmedium confidence
With the Q2 2026 print (2026-08-06), Constellation disclosed signing an additional 920 MW of long-term (15-20 year) power purchase agreements with 'a diverse set of investment grade customers,' deliveries beginning 2029 through 2032. Among these, a 176 MW agreement with Walmart Inc. - Walmart's first-ever nuclear PPA - was named specifically: approximately 176 MW of wholesale supply including a 30 MW capacity expansion at the Dresden Clean Energy Center, structured as two 15-year terms beginning in 2029 and 2030.
against this

Only Walmart (176 MW of the 920 MW total) is named; the remaining roughly 744 MW is described only as 'a diverse set of investment grade customers' with no per-customer volume or term disclosed, and management explicitly declined on the earnings call to disclose specific pricing or customer identity, citing customer sensitivity - so the breadth of the demand pipeline beyond Walmart cannot be independently verified from what has been disclosed.

current state · 2026-08-06written 2026-08-24
Priced against its rivals

The competitors its own annual report names, each confirmed against the rival's filing. Measured on company value for each $1 of sales, cheapest first:

TickerCompanycompany value for each $1 of sales
NRGNRG Energy1.3×
CEGConstellation Energy3.9×
VSTVistra4.1×
TLNTalen Energy6.7×

The middle of the other 3 is 4.1. Constellation Energy Corporation is 2nd cheapest of 4.

Rivals' figures come from a data provider, so read the spread of the group rather than any single pair.

Near the middle of the power producers it competes with, so the rich price is largely the group's, not Constellation's alone.

Where we disagree with the market

The market believes

The clean, nuclear way to own the AI-power boom, with Calpine mostly a story about getting bigger.

We believe

The higher price is mostly earned by scale, long nuclear licences and the best signed pipeline here, but it leaves little room for a setback.

Coverage treats the Calpine debt and the grid-rule debate as footnotes. We think they are the two clearest risks to that higher price: debt nearly tripled in six months, and the proposed rule would charge the very customers the contracts are sold to.

We are wrong if deals keep being named, Three Mile Island restarts on time and the rule leaves existing plants alone.

What analysts say, and the evidence
The evidence under this - 4 claims
C13facthigh confidence
Balance sheet, 2026-06-30 versus 2025-12-31: total assets $98,253M versus $57,249M; goodwill $11,527M versus $420M; total debt (short-term borrowings plus current and long-term debt) approximately $24,700M versus approximately $8,992M; cash and restricted cash $1,077M at period end. H1 2026 capital expenditures were $2,521M versus $1,573M in H1 2025, and the Calpine acquisition itself used $2,537M of cash, net. Average diluted shares outstanding rose to 360M in Q2 2026 from 314M in Q2 2025, primarily reflecting the 50 million shares issued as Calpine merger consideration.
current state · 2026-06-30written 2026-08-24
C08facthigh confidence
On January 16, 2026, the National Energy Dominance Council, with support from PJM-territory governors, urged PJM to file tariff revisions at FERC addressing reliability and pricing within its capacity auctions, including a Reliability Backstop Auction to procure new out-of-market capacity and specifically 'allocating costs to data centers through the Reliability Backstop Auctions.' Separately, in December 2025, FERC found PJM's existing tariff 'unjust and unreasonable' for lacking clarity on rates and terms for serving co-located load.
historical · 2025-12 (FERC show-cause order) and 2026-01-16 (NEDC letter to PJM)written 2026-08-24
C07management claimmedium confidence
With the Q2 2026 print (2026-08-06), Constellation disclosed signing an additional 920 MW of long-term (15-20 year) power purchase agreements with 'a diverse set of investment grade customers,' deliveries beginning 2029 through 2032. Among these, a 176 MW agreement with Walmart Inc. - Walmart's first-ever nuclear PPA - was named specifically: approximately 176 MW of wholesale supply including a 30 MW capacity expansion at the Dresden Clean Energy Center, structured as two 15-year terms beginning in 2029 and 2030.
against this

Only Walmart (176 MW of the 920 MW total) is named; the remaining roughly 744 MW is described only as 'a diverse set of investment grade customers' with no per-customer volume or term disclosed, and management explicitly declined on the earnings call to disclose specific pricing or customer identity, citing customer sensitivity - so the breadth of the demand pipeline beyond Walmart cannot be independently verified from what has been disclosed.

current state · 2026-08-06written 2026-08-24
C04facthigh confidence
In September 2024, Constellation executed a 20-year PPA with Microsoft to support the restart of Three Mile Island Unit 1, renamed the Crane Clean Energy Center (approximately 835 MW of emissions-free capacity once operational). In November 2025, the DOE Office of Energy Dominance Financing issued a guarantee for up to $1.0 billion for an unsecured loan (37.5 basis points over comparable Treasuries, maturing October 2055) to support the restart. As of the Q2 2026 print (2026-08-06), FERC granted a waiver allowing transfer of Capacity Interconnection Rights to Crane and the NRC approved a fuel license amendment request, both clearing regulatory hurdles toward a targeted 2027 restart.
against this

The restart remains subject to further permitting and construction milestones beyond the two clearances disclosed with the Q2 2026 print, so a 2027 restart date is management's own targeted timeline rather than a settled fact; delays to comparable large nuclear restarts have occurred industry-wide in the past.

current state · 2026-08-06written 2026-08-24
06

What could go wrong, and how we would know

The risks

  • Debt nearly tripled. Debt rose from about $9.0B to about $24.7B in six months, while spending on plants left free cash flow near zero.
  • A rule aimed at its customers. The National Energy Dominance Council has urged the grid operator to charge new capacity costs to data centres, the buyers the whole contract story depends on.
  • More shares coming. About 25 million Calpine shares unlock in June 2027. The last early sale knocked 7.7% off the price.
  • A restart that could slip. Microsoft's contract rests on restarting Three Mile Island in 2027. Approvals are clearing, but the reactor is not running yet.
The evidence under this - 6 claims
C13facthigh confidence
Balance sheet, 2026-06-30 versus 2025-12-31: total assets $98,253M versus $57,249M; goodwill $11,527M versus $420M; total debt (short-term borrowings plus current and long-term debt) approximately $24,700M versus approximately $8,992M; cash and restricted cash $1,077M at period end. H1 2026 capital expenditures were $2,521M versus $1,573M in H1 2025, and the Calpine acquisition itself used $2,537M of cash, net. Average diluted shares outstanding rose to 360M in Q2 2026 from 314M in Q2 2025, primarily reflecting the 50 million shares issued as Calpine merger consideration.
current state · 2026-06-30written 2026-08-24
C19facthigh confidence
On the filed-competitor cohort (VST, NRG, TLN): EV/EBITDA subject 16.8x, but the cohort comparison is unavailable - only NRG reconciles cleanly enough to compare after VST and TLN are withheld for margin-reconciliation gaps, below the pack's 2-member floor. EV/Sales is 3.9x against a three-peer median of 4.1x (rank 2 of 4, near median). P/E is 26.5x against a two-peer median of 26.15x (VST and NRG comparable; TLN not meaningful - near median). P/FCF is 317.1x against a three-peer median of 33.4x (rank 4 of 4), driven by Constellation's currently near-zero free cash flow from heavy Calpine-integration and growth capex rather than a genuine valuation signal. P/B is 3.0x (rank 1 of 4, cheapest of the cohort), which is more plausibly explained by the fresh Calpine purchase-accounting step-up to book equity than by a genuine value signal.
current state · 2026-08-24written 2026-08-24
C08facthigh confidence
On January 16, 2026, the National Energy Dominance Council, with support from PJM-territory governors, urged PJM to file tariff revisions at FERC addressing reliability and pricing within its capacity auctions, including a Reliability Backstop Auction to procure new out-of-market capacity and specifically 'allocating costs to data centers through the Reliability Backstop Auctions.' Separately, in December 2025, FERC found PJM's existing tariff 'unjust and unreasonable' for lacking clarity on rates and terms for serving co-located load.
historical · 2025-12 (FERC show-cause order) and 2026-01-16 (NEDC letter to PJM)written 2026-08-24
C15facthigh confidence
On June 1-2, 2026, Selling Shareholders (the legacy Calpine merger-consideration holders) sold 11,000,000 shares of Constellation common stock (plus up to a 1,350,000-share underwriter option) in an underwritten secondary offering; Constellation itself sold zero shares. Concurrently, Constellation repurchased approximately $558.0 million of stock directly from the underwriters at the offering price, under its existing share-repurchase program, leaving approximately $3.5 billion of remaining buyback authority. The 50 million Calpine merger-consideration shares carry a lock-up expiring June 30, 2026 for the first half and June 30, 2027 for the remaining half, so the June 2026 sale was an early, negotiated release of (part of) the first tranche.
against this

Despite the offering carrying zero net primary dilution (the Company sold no shares and repurchased a portion at the same price), the stock still fell 7.7% on the announcement, a measured, volume-relevant reaction - a real technical/supply-overhang cost distinct from actual dilution, and a pattern that could repeat when the remaining 25 million lock-up shares unlock in June 2027.

historical · 2026-06-01 to 2026-06-02written 2026-08-24
C26factmedium confidence
Of 12 trusted-source news items in the research window, only the June 1, 2026 secondary-offering announcement produced a measured, volume-confirmed negative reaction (-7.7%, 'strong'); the Q2 2026 earnings release itself (which included the raised guidance) drew only a mild -1.5% reaction, and an August 5, 2026 board-chairman-transition announcement (CEO Joseph Dominguez unaffected) drew -0.8%, both 'weak' and not volume-confirmed.
current state · 2026-08-24written 2026-08-24
C04facthigh confidence
In September 2024, Constellation executed a 20-year PPA with Microsoft to support the restart of Three Mile Island Unit 1, renamed the Crane Clean Energy Center (approximately 835 MW of emissions-free capacity once operational). In November 2025, the DOE Office of Energy Dominance Financing issued a guarantee for up to $1.0 billion for an unsecured loan (37.5 basis points over comparable Treasuries, maturing October 2055) to support the restart. As of the Q2 2026 print (2026-08-06), FERC granted a waiver allowing transfer of Capacity Interconnection Rights to Crane and the NRC approved a fuel license amendment request, both clearing regulatory hurdles toward a targeted 2027 restart.
against this

The restart remains subject to further permitting and construction milestones beyond the two clearances disclosed with the Q2 2026 print, so a 2027 restart date is management's own targeted timeline rather than a settled fact; delays to comparable large nuclear restarts have occurred industry-wide in the past.

current state · 2026-08-06written 2026-08-24
What we still do not know
  • Who the unnamed buyers in August's 920 megawatts are, and whether their deals become disclosed contracts with sizes and terms.
  • How PJM finally shares out new capacity costs, and whether any of it lands on Constellation's existing plants.
The evidence under this - 3 claims
C07management claimmedium confidence
With the Q2 2026 print (2026-08-06), Constellation disclosed signing an additional 920 MW of long-term (15-20 year) power purchase agreements with 'a diverse set of investment grade customers,' deliveries beginning 2029 through 2032. Among these, a 176 MW agreement with Walmart Inc. - Walmart's first-ever nuclear PPA - was named specifically: approximately 176 MW of wholesale supply including a 30 MW capacity expansion at the Dresden Clean Energy Center, structured as two 15-year terms beginning in 2029 and 2030.
against this

Only Walmart (176 MW of the 920 MW total) is named; the remaining roughly 744 MW is described only as 'a diverse set of investment grade customers' with no per-customer volume or term disclosed, and management explicitly declined on the earnings call to disclose specific pricing or customer identity, citing customer sensitivity - so the breadth of the demand pipeline beyond Walmart cannot be independently verified from what has been disclosed.

current state · 2026-08-06written 2026-08-24
C08facthigh confidence
On January 16, 2026, the National Energy Dominance Council, with support from PJM-territory governors, urged PJM to file tariff revisions at FERC addressing reliability and pricing within its capacity auctions, including a Reliability Backstop Auction to procure new out-of-market capacity and specifically 'allocating costs to data centers through the Reliability Backstop Auctions.' Separately, in December 2025, FERC found PJM's existing tariff 'unjust and unreasonable' for lacking clarity on rates and terms for serving co-located load.
historical · 2025-12 (FERC show-cause order) and 2026-01-16 (NEDC letter to PJM)written 2026-08-24
C09management claimmedium confidence
On the Q2 2026 earnings call, management described being engaged in a confidential bilateral contracting process with customers to add megawatts 'in combination with our existing capabilities,' referencing a 6 GW PJM reliability shortfall figure and '5 gigawatts' of newly eligible capacity highlighted on the prior call, while declining to disclose specific pricing or customer identity 'to protect customer sensitivity.'
against this

Management's repeated refusal to disclose pricing or counterparty detail across two consecutive calls means the market cannot independently verify how much of the 6 GW/5 GW opportunity Constellation is actually converting versus merely discussing.

forwardwritten 2026-08-24

What would change our view

  1. Neutral→AttractiveThe pipeline keeps compounding on schedule

    It needs all of:

    • ○New data-centre deals keep arriving with named buyers and sizes, and the Three Mile Island restart stays on track for 2027.watched as it happens
    • ○Debt starts falling back toward where it stood before the Calpine purchase.checked at the next results, due by 9 Nov
  2. Neutral→UnattractiveRules or the balance sheet turn

    It needs any of:

    • ○PJM finalises rules that put meaningful new capacity costs on Constellation's own plants.watched as it happens
    • ○Calpine's former owners sell another large block of shares when the rest unlock in June 2027.watched as it happens
We would also be wrong if
  • The Three Mile Island restart slips well past 2027.
  • Several quarters pass with no new named contract.

What is coming

  • 9 November 2026 Q3 2026 results: Whether 2026 guidance holds or rises again, whether more of the unnamed 920 MW gets named, and how debt moved after the gas-plant purchase.
Every dated event ahead
  • 9 November 2026 Q3 2026 results: Whether 2026 guidance holds or rises again, whether more of the unnamed 920 MW gets named, and how debt moved after the gas-plant purchase.
  • February 2027 Q4 2026 results and 2027 guidance: A fifth year against the guidance midpoint, the first full-year guidance with Calpine, and whether leverage falls back toward its pre-merger level.
  • June 2027 Meta's Clinton power agreement starts: Whether the first large data-centre contract begins delivering on time as the Illinois support programme for Clinton ends.
  • 30 June 2027 Last 25 million Calpine lock-up shares released: Whether the Calpine sellers sell again and whether the price drops as it did on the June 2026 sale.
  • December 2027 Crane Clean Energy Center restart: Whether the Microsoft-backed restart comes online within its 2027 target, the test of turning signed demand into running capacity.
Since we wrote this
Written
24 Aug
Price the thesis read
$272.88
21 Aug
  • 27 OctNewsConstellation won a conditional federal loan of up to $5B; its terms are unread. View heldConditional Department of Energy loan commitment of up to $5 billion for nuclear output.
  • 7 OctNewsGoogle becomes a named Constellation power buyer, 890 MW, terms unread. View heldGoogle and Constellation announced a long-term agreement for 890 MW of new nuclear capacity on the PJM grid.
  • 5 OctThesis reviewThe long case now sits under the verdictAfter the five-name pilot, the owner asked for the long case on every thesis.
  • 4 OctThesis reviewOwner's checklist: revenue streams, cost of growth, management, catalystsThe owner's checklist found the method silent on who runs the company, what growth costs, where the money comes from and what is dated ahead; this pass fills those four blocks from the proxy and filings.
  • 1 OctNewsAmazon becomes a named Constellation power buyer, 190 MW for 20 years. View heldConstellation and Amazon announced a 20-year power purchase agreement for 190 MW from Calvert Cliffs.
  • 26 SepThesis reviewDear against its own past, not its peers. View heldThe top of the page said Constellation trades richer than every peer. On the comparisons that can be made it sits near its rivals' median; the premium is to its own history.
  • 24 SepNewsA $715 million gas-plant purchase from Shell, too small to move leverage. View heldConstellation agreed to buy the Rhode Island State Energy Center, a gas-fired plant, from Shell for $715 million.
  • 24 AugThesis writtenNeutral, medium convictionWritten eighteen days after the June-quarter results raised the year's profit forecast, with the shares about a third below their high.

Also checked 2 times with nothing new to act on.

Sources 17

Where this came from

Sources - 17

Every claim above cites one of these, or states the reasoning that derived it. The quote is frozen at the date it was read: a link can rot, and an agent fetch returns a reading of a page rather than the page. Backs counts the whole claim ledger, so it can name a claim this page does not surface.

  1. S01primarycompany filing2026-02-24
    Calpine merger detail, business description, PPA history, nuclear license table, PJM regulatory backdrop, credit ratings and liquidity, Fortune 100 and counterparty-concentration disclosure
    backsC01C02C04C05C08C14C15C16C17C19C20C28C30C33
  2. S02primarycompany filing2026-08-06
    Q2 2026 results, raised FY2026 guidance, the 920 MW PPA batch and Walmart detail, FERC/NRC Crane milestones, balance-sheet and cash-flow detail
    backsC04C07C11C13C17C18
  3. S03primarycompany filing2026-05-11
    Q1 2026 results and GAAP/Adjusted reconciliation, affirmed FY2026 guidance, Fortune 100 figure
    backsC11C12C16C17
  4. S04primarycompany filing2026-02-24
    FY2025 full-year results, original 2026 guidance, CyrusOne/Freestone PPA announcement, CEO/CFO commentary on Microsoft/Meta/CyrusOne
    backsC06C11
  5. S05primarycompany filing2026-08-06
    segment note (resolving the segments_do_not_reconcile flag), balance sheet detail, H1 2026 cash flow
    backsC03C13C17C27C28C33
  6. S06primarycompany filing2026-06-02
    the June 2026 secondary offering (Selling Shareholders only, zero Company shares sold) and the concurrent $558.0M Company share repurchase
    backsC15
  7. S07secondaryindustry data2025
    independent confirmation of nuclear power's share of total US electricity generation, for the moat claim
    About 19% was from nuclear energy
    backsC21
  8. S08secondaryindustry data2026-06-25
    independent confirmation of US LNG feedgas growth, reused from this repo's Range Resources and Expand Energy theses
    feedgas flows averaged 18.1 Bcf per day year-to-date through June 24, [...] 19 percent higher than the same period in 2025.
    read, but no claim rests on it
  9. S09secondaryindustry data2026-04-16
    independent EIA export-growth projection, reused from this repo's Range Resources and Expand Energy theses
    U.S. LNG exports rise 1.9 Bcf/d in 2026 to average 17.0 Bcf/d, and we forecast that LNG exports will increase an additional 9% (1.5 Bcf/d) in 2027.
    read, but no claim rests on it
  10. S10secondaryindustry data2026-07-27
    independent evidence of a real quarter-over-quarter dip in LNG feedgas volumes, reused from this repo's Range Resources and Expand Energy theses
    Total feed gas averaged 18.4 Bcf/d during the first quarter, though that fell to 17.8 Bcf/d during the three-month period ending June 30.
    read, but no claim rests on it
  11. S11secondaryindustry data2026
    independent tracking of behind-the-meter/off-grid data-center generation, reused from this repo's power-sector theses
    Nearly every hyperscaler is pursuing behind-the-meter power projects-either directly or through partners.
    backsC23
  12. S12secondaryvendor data2026-08-24
    Portfolio-management research pack (market tier: price, technicals, insiders, analysts, news reaction)
    content/CEG/research-pack.json
    price/technicals snapshot, insider Form 4 aggregation, analyst consensus, own-history valuation time series, measured news reaction
    backsC18C24C25C26
  13. S13secondaryvendor data2026-08-24
    Portfolio-management research pack (vendor_fundamentals tier: peer_valuation cohort, filed-vs-vendor reconciliation)
    content/CEG/research-pack.json
    cohort valuation multiples on the filed-competitor cohort (VST, NRG, TLN) and the filed_margin_gap detail behind which peers are withheld
    backsC17C19
  14. S14primarytranscript2026-08-06
    Constellation Energy Corporation Q2 2026 earnings call transcript (question section)
    Alpha Vantage EARNINGS_CALL_TRANSCRIPT, CEG 2026Q2
    management's own framing of the PJM bilateral contracting process, the 6 GW/5 GW figures, and the ERCOT Batch Zero response
    to the point of trying to protect customer sensitivity around the exact pricing, we're going to keep that range as it is
    backsC09C10
  15. S15secondaryindustry data2026
    independent EIA projection of US data-center electricity demand growth, for the prize's base factor
    Data center server electricity use grows to 22%-33% of commercial building electricity use by 2050 across our cases.
    backsC22
  16. S16primarycompany release2026-06-22
    the Walmart PPA's term structure (two 15-year terms beginning 2029 and 2030), not itemized in the Q2 2026 8-K itself
    Walmart will purchase energy, environmental attributes and capacity through two 15-year terms beginning in 2029 and 2030.
    backsC07
  17. S17primarycompany filing2026-03-19
    beneficial ownership as of March 2, 2026 and the holders above 5%, the 2025 annual incentive and long-term plan metrics, weights and payouts, the FCF-before-growth goals raised for Calpine, the post-close leadership appointments
    backsC30C31C32
Rendered from content/CEG/thesis.json · thesis reviewed 2026-08-24. This page explains a company; it does not say what to pay, when to buy or how much.