3 Small Nuclear Stocks Wall Street Has Not Fully Priced for the AI Power Shortage Yet.

Small modular reactors sit at the intersection of the two biggest stories in power right now: hyperscalers scrambling for firm, carbon-free baseload, and a US grid that has not built meaningful new nuclear capacity in a generation. The demand pressure is quantifiable. The EIA’s High Electricity Demand case projects data center server energy use will grow to 818 billion kilowatthours in 2050, more than 16 times the 2020 level, and Oklo’s own filings cite the Goldman Sachs projection of roughly 165% growth in AI-driven data center power demand by 2030. That is the tailwind. The catch, and the reason to read the following names very differently, is that only one of the three has cash flow today.

Talen Energy: Cash Flow, Powered Land, and a PJM Tailwind

Talen Energy (NASDAQ:TLN | TLN Price Prediction) is the operating business in this roster. It owns the Susquehanna nuclear station plus an expanded gas fleet after the June 15, 2026 close of the Cornerstone Acquisition, which added roughly 2.6 GW at Waterford, Darby, and Lawrenceburg. This is a merchant independent power producer with real megawatt-hours going out the door and real dollars coming back.

The Q2 2026 numbers make the distinction from the SMR developers unmissable. Revenue was $747 million, up 64.5% year over year, adjusted EBITDA was $374 million versus $90 million a year earlier, and adjusted free cash flow was $212 million versus a $78 million outflow. GAAP EPS printed negative $2.00 versus a $3.39 estimate, missing expectations largely because of $211 million in unrealized derivative losses and interest expense jumping to $214 million from $62 million on $4 billion of new senior unsecured notes issued for Cornerstone. Management raised full-year guidance to adjusted EBITDA of $2.025 billion to $2.225 billion and adjusted free cash flow of $1.20 billion to $1.35 billion.

The PJM setup is the real story. Talen cleared over 10 GW in the 2028/2029 PJM Base Residual Auction at $325.00/MWd. On the Q2 call, President Terry Nutt said 70% of PJM’s 10 highest peak load days since the inception of the modern PJM occurred over the last 15 months, and CEO Mac McFarland noted that WestHub Sparks increased by nearly 50% since last year with forward wholesale prices for capacity and energy approaching or exceeding the $80 per megawatt-hour range previously discussed for long-term hyperscaler PPAs. The existing AWS contract at Susquehanna is nearly two gigawatts ramping through 2030, with management guiding long-term contracted margin from 10% to 35% as the campus builds out.

Bull case: Talen has approximately four gigawatts of data center sites with utility load commitments and more than two gigawatts of new-build capacity projects backed with interconnection queue positions. Management expects approximately $4 billion of adjusted free cash flow between the balance of 2026 and the end of 2028, with at least 70% returned to shareholders through buybacks. The stock is down 19.42% year to date, and analyst coverage is thin: only 6 EPS analysts contribute to both the 2026 and 2027 fiscal year estimates, with the 2027 EPS estimate averaging 30.7681 across a 26.06 to 37.06 range. That is the “not fully priced” setup: a merchant generator whose forward cash flow curve is being written in real time by hyperscaler contracting, with limited sell-side coverage. McFarland put it plainly: “This is like one of the greatest opportunities we’ve seen in this sector in a long time.”

Risk: Only 30% of 2028 generation is hedged, leverage is elevated after the $4 billion in new debt for Cornerstone (net debt roughly $9.5 billion), and GAAP earnings will remain volatile from derivative marks.

NuScale Power: Design Certified, But Still Pre-Revenue and Speculative

Speculative flag, unmissable: NuScale Power (NYSE:SMR) is an early-stage SMR developer with essentially no revenue today. It carries materially higher risk than Talen and behaves like a small, high-variance position. In Q2 2026, revenue collapsed to $75,000, down 99.1% year over year from $8.05 million, because the Fluor FEED Phase 2 engineering services for the RoPower project ended in late 2025 with no replacement. Operating loss was $64.0 million, and net loss attributable to Class A holders was $47.54 million. Analysts expect the losses to continue: the consensus EPS for fiscal 2026 is negative 0.4826 and for fiscal 2027 is negative 0.7237.

The bull case rests on regulatory position and readiness. NuScale is the only US NRC design-certified SMR, with Standard Design Approval received May 2025, and CEO John Hopkins framed the design certification as “the global gold standard for nuclear safety.” On the Q2 call, Hopkins said “We’ve already negotiated supplier agreements with more than half of our 60-plus supplier relationships” and “The detailed design for the critical path components of our modules, the systems that govern schedule and cost, is mature.” The company closed the quarter with approximately $1.9 billion in cash, cash equivalents, and investments, supported by roughly $984.48 million in net equity proceeds raised in the first half of 2026.

The commercial catalyst is the TVA program, which remains a non-binding discussion, not a signed agreement. Management stated that “Interwent Energy, our strategic partner, continues to advance discussions with the Tennessee Valley Authority toward a definitive power purchase agreement for potentially the largest nuclear power deployment program in U.S. history.” Hopkins added: “The market’s waiting for definitive agreements, and once they’re in place, we’re ready to move.”

Bull case: NuScale is the closest US SMR developer to commercial deployment, with the regulatory box checked and a supply chain largely under contract. If TVA converts to a signed PPA, the deployment scale is potentially transformative.

Risk: The list is long and disclosed in the filings: no established SMR market, unproven cost-competitiveness, dependence on the ENTRA1 partnership, need for additional funding, Fluor’s full exit of its stake, and a securities-fraud class action referenced in the Q1 recap. The stock is down 32.53% year to date and down 74.33% over the past year. Investors are paying for a call option on TVA converting.

Oklo: First Criticality Achieved, Commercial Power Still Ahead

Speculative flag, unmissable: Oklo (NYSE:OKLO) is a pre-revenue advanced fission developer. Fiscal 2024 revenue was $0 with a net loss of $73.62 million. Analysts model fiscal 2026 revenue averaging just $2.24 million across 17 analysts, with a low estimate of $0, and fiscal 2026 EPS at negative 0.9396. This is a materially higher-risk name than Talen.

What changed in Q2 2026 is the execution story. Oklo’s Groves isotope reactor reached first criticality, and CEO Jake DeWitte said “Based on our internal reviews, Groves represents the fastest transition that we are aware of from greenfield to criticality for a full scale, privately funded and privately cited reactor in history”, with substantial construction completed in 229 days. On the Aurora INL commercial power project, management reiterated the planned 2028 startup and confirmed DOE approval of the Preliminary Documented Safety Analysis during the quarter. Oklo also entered an MOU with Kiewit covering engineering, procurement, construction, and execution planning for the initial phase of the 1.2 gigawatt Ohio Power Campus.

The customer pipeline is where the “signed versus non-binding” distinction matters most. Oklo’s roughly 14 GW pipeline is anchored by a 12 GW master power agreement with Switch (delivery by 2044), plus a non-binding LOI with Equinix for up to 500 MW with $25 million pre-payment, a non-binding LOI with Prometheus Hyperscale for 100 MW, and a non-binding LOI with Diamondback Energy for 50 MW. These are commitments to negotiate rather than binding PPAs. The Centris HALU fuel arrangement is also a letter of intent anticipating a definitive agreement covering multiple years of initial core and reload needs for up to five Aurora powerhouses, with deliveries beginning in 2029.

Balance sheet: $3 billion in cash and marketable securities at quarter end, including $1.9 billion of capital generated from ATM programs in 2026. Updated 2026 guidance calls for cash used in operating activities of $120 million to $150 million and cash used for property, plant, and equipment of $400 million to $500 million.

Bull case: Oklo now has an operating reactor to point to. It has a DOE site use permit at Idaho National Laboratory and secured fuel for the first deployment, and it is building a vertically integrated platform spanning power, fuel, and isotopes.

Risk: No commercial power project is operating, most customer commitments are non-binding, the NRC combined license application timeline is not fully de-risked, and additional financing will be needed to build plants. The stock is down 44.93% year to date and down 46.30% over the past year, and consensus EPS estimates have been revised sharply lower over 30 days, with the 2026 average moving from negative 0.6955 to negative 0.9396.

How to Think About the Three Together

The through-line is that AI data center load is real and firm baseload power is scarce, but the three names in this piece monetize that shortage on completely different clocks. Talen books revenue and free cash flow now, with capacity auctions and hyperscaler contracts widening spreads through 2028. NuScale and Oklo are option-like exposures on regulatory conversion, customer conversion from LOI to PPA, and construction execution that ends in 2028 at the earliest. The three names occupy different roles: TLN is the operating, cash-flow-generating position, while SMR and OKLO are high-variance, option-like exposures on regulatory and commercial conversion (we mapped five ways to play the nuclear restart, utilities and fuel suppliers included, in a free report you can grab here). Keep an eye on the stock reactions when the next PJM auction clears, when TVA converts (or does not), and when Aurora INL reaches its next DOE gate.

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