brain/
← all entities
entityCEGstock-market

Constellation Energy (CEG)

Notes

Constellation Energy (CEG)

One-line summary: Largest US nuclear operator; signed Microsoft Three Mile Island PPA (>2x spot, 20-year) and multiple hyperscaler agreements — but faces a material new risk: PJM interconnection delay that could push the Crane Clean Energy Center (TMI Unit 1) from 2027 to 2031.

What it is

Constellation Energy Group (Nasdaq: CEG) is the largest nuclear power operator in the United States, operating 21 nuclear power plants. Following the $21.8B acquisition of Calpine Corp (completed 2026), Constellation also operates significant gas and renewable generation. Headquartered in Baltimore, MD.

Why it matters to stock-market

CEG is the primary listed operator play in nuclear-baseload-for-ai-data-centers. Microsoft's Three Mile Island Unit 1 PPA (835 MW, 20-year, reportedly >2x spot rate) established that hyperscalers will pay a major reliability premium for nuclear. Subsequent hyperscaler PPAs (Meta, others) follow the CEG pattern.

Key facts

Q1 2026 earnings (reported May 11, 2026 — primary source):

  • Revenue: $11.12B (+64% YoY — Calpine acquisition consolidation)
  • Adjusted EPS: $2.74 (beat $2.59 consensus); GAAP EPS $4.49
  • Full-year 2026 adjusted EPS guidance: $11–$12 per share (midpoint $11.50 vs $11.60 consensus) → single-day -8% sell-off
  • Calpine accretion: shane-smith in 2026-05-11-earnings-ceg-q1-2026: "Calpine integration contributed approximately $0.60 per share of EPS accretion in Q1." — Q1 alone at $0.60 validates full-year Calpine thesis.
  • FCF guidance (primary source): shane-smith in 2026-05-11-earnings-ceg-q1-2026: "Free cash flow of $8.4 billion projected for 2026-2027, rising to $11.5–$13 billion for 2028-2029 — approximately 45% growth at the midpoint."
  • Hyperscaler capex (primary source): joseph-dominguez in 2026-05-11-earnings-ceg-q1-2026: "Projected spending levels for 2026 are nearly 75% higher than last year and continue to be revised upward."
  • Shares repurchased: 1.2M shares @ $285 average ($335M).
  • Stock: -11.6% since Q1 earnings; -13% YTD as of late May 2026
  • Concern: Calpine integration risk, share dilution, "gas acquirer with nuclear assets" re-rate

Nuclear capacity and PPAs:

  • Crane Clean Energy Center (Three Mile Island Unit 1): 835 MW restart; 20-year PPA with Microsoft (reportedly >2x spot). New risk: PJM interconnection delay — potential slip from 2027 to 2031 per Q1 2026 commentary. $1.6B restart investment. See nuclear-baseload-for-ai-data-centers contradictions section.
  • Illinois reactors (Braidwood, Byron): Meta 20-year agreement to keep Illinois reactors operating; CEG secured 1 GW of planned nuclear uprates over next decade (announced April 21, 2026, includes 135 MW at Braidwood/Byron).
  • 9.8 GW cumulative hyperscaler nuclear commitments across 13 projects (as of May 2026).

Calpine acquisition:

  • $21.8B deal (enterprise value) closed January 7, 2026; DOJ required divestiture of 5 gas plants as a condition of clearance
  • Adds 23 GW of gas/renewable capacity + retail energy platform
  • Integration risk = primary overhang; market re-rating CEG from "nuclear pure-play" to "gas acquirer with nuclear assets"

Stock: ~$11.50 EPS guidance midpoint; -13% YTD as of May 2026. Specific stock price not available (WebFetch 403).

Related

Regulatory / regulatory risk developments (June 2026)

  • Susquehanna/Amazon BTM co-location blocked (FERC, March 2026): From 2026-06-08-autoresearch-ferc-rm26-4-ceg-nuclear-colocation-june-2026: FERC upheld the PJM decision denying Amazon's behind-the-meter (BTM) co-location application at Susquehanna on grounds of cost-shifting (~$140M/yr to other ratepayers) and non-standard provisions. The BTM model — in which a hyperscaler connects directly behind a nuclear generator's meter without touching the grid — is blocked for CEG's PJM plants. The PPA model (TMI/Microsoft, cleared June 1, 2026 via CIR waiver) is the approved path.
  • NOPR risk (June 2026): From 2026-06-08-autoresearch-ferc-rm26-4-ceg-nuclear-colocation-june-2026: multiple legal commentators expect the FERC RM26-4-000 large-load interconnection proceeding to produce a NOPR (Notice of Proposed Rulemaking) rather than a final rule in June 2026 — implying a 12-18 month delay before a final rule standardizing large-load interconnection. CEG management guided additional hyperscaler co-location deals for H2 2026 contingent on the FERC framework; a NOPR substantially delays this pipeline. See ceg-calpine-lockup-entry-window for entry-timing implications.
  • CEG pipeline in PJM: "paused but not cancelled": From 2026-06-08-autoresearch-ferc-rm26-4-ceg-nuclear-colocation-june-2026: CEG's ~5 GW of hyperscaler co-location capacity in the PJM interconnection queue is described as "paused but not cancelled" pending the FERC RM26-4 framework. Not a thesis-negation — these projects remain in queue — but the near-term catalyst (H2 2026 co-location deal announcements) is contingent on the FERC ruling.
  • CyrusOne/Freestone ERCOT deal (outside PJM rules): From 2026-06-08-autoresearch-ferc-rm26-4-ceg-nuclear-colocation-june-2026: CyrusOne and Freestone Energy agreed to a 380 MW + 380 MW nuclear DC co-location arrangement in ERCOT (Texas). ERCOT is not subject to PJM or FERC-PJM co-location rules; this deal demonstrates that the co-location model is advancing outside the PJM-blocked pathway, and may accelerate adoption of ERCOT-sited CEG nuclear.

New developments (June 1, 2026)

  • PJM FERC submission (primary source): joseph-dominguez in 2026-05-11-earnings-ceg-q1-2026: "The light now is clearly visible at the end of the tunnel. PJM targeting June submission to FERC for new capacity market rules." — direct CEO confirmation of the June gate.
  • CIR transfer gate (primary source): david-dardis in 2026-05-11-earnings-ceg-q1-2026: "Transfer of Capacity Interconnection Rights from Eddystone to Crane expected to facilitate 2027 capacity credit, with FERC response anticipated in June-July timeframe." — primary-source confirmation that the June-July FERC response on the CIR transfer determines whether Crane gets 2027 credit (vs. 2031 fallback).
  • From 2026-06-01-autoresearch-ceg-nuclear-june-2026: PJM FERC submission target: June 2026 — corroborated by Q1 call above; "critical clarity for large load customers evaluating colocated data center projects."
  • From 2026-06-01-autoresearch-ceg-nuclear-june-2026: NEW RISK — Calpine lockup expiry June 30, 2026: up to 25 million shares of potential supply overhang as Calpine former shareholders can sell. This is a technical (not thesis) risk; 14 days from June 1. See ceg-calpine-lockup-entry-window.
  • From 2026-06-01-autoresearch-ceg-nuclear-june-2026: US Government grid reliability order: US Government ordered CEG to keep its Pennsylvania nuclear plants running — treating nuclear as critical infrastructure. Structural moat signal: CEG cannot be easily replaced; government intervention validates the grid-reliability premium.
  • From 2026-06-01-autoresearch-ceg-nuclear-june-2026: TIKR price target $569 (~90% upside at $300). CEG ~$300 as of May 12 (stock at $287.75 on May 29 per dispatch); -27% to -30% from 52w high of $412.70.
  • From 2026-06-01-autoresearch-ceg-nuclear-june-2026: Nuclear capacity factor Q1 2026: 92.3%, generating 40 million MWh. New capacity submitted to PJM interconnection queue: ~5,000 MW (nuclear uprates + gas + storage). Hyperscaler spending: +75% YoY projected; data center power delivery energizing Q4 2026.

Sources

Referenced by
Questions
Hypothesis: CEG Calpine lockup June 30 → forced selling pressure → entry window at lower priceTalen Energy: a below-replacement-cost IPP on PJM power scarcity — does the Amazon contract roll-up + new-build optionality re-rate it from 7x to 15x FCF?
Entities
Talen Energy (TLN)