IMSR vs NNE vs SMR vs OKLO

For growth investors, NuScale Power Corporation (SMR) is the stronger pick with -15.

0% revenue growth year-over-year, versus -100. 0% for Terrestrial Energy Inc. (IMSR). Analysts rate Nano Nuclear Energy Inc (NNE) a "Buy" — based on 3 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

Over the past 5 years, Nano Nuclear Energy Inc (NNE) delivered a total return of +383.

2%, compared to -66. 7% for Terrestrial Energy Inc. (IMSR). Over 10 years, the gap is even starker: NNE returned +383. 2% versus IMSR's -66. 7%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Nano Nuclear Energy Inc (NNE) is the lower-risk stock at 3.

93β versus Terrestrial Energy Inc. 's 4. 60β — meaning IMSR is approximately 17% more volatile than NNE relative to the S&P 500. On balance sheet safety, Oklo Inc. (OKLO) carries a lower debt/equity ratio of 0% versus 1% for Nano Nuclear Energy Inc — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), NuScale Power Corporation (SMR) is pulling ahead at -15.

0% versus -100. 0% for Terrestrial Energy Inc. (IMSR). On earnings-per-share growth, the picture is similar: Oklo Inc. grew EPS 3. 3% year-over-year, compared to -200. 0% for Terrestrial Energy Inc.. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Terrestrial Energy Inc.

(IMSR) is the more profitable company, earning 0. 0% net margin versus -1130. 3% for NuScale Power Corporation — meaning it keeps 0. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: IMSR leads at 0. 0% versus -21. 9% for SMR. At the gross margin level — before operating expenses — SMR leads at 36. 3%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Nano Nuclear Energy Inc (NNE) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+383.

2% 10Y return). Terrestrial Energy Inc. (IMSR) carries a higher beta of 4. 60 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (NNE: +383. 2%, IMSR: -66. 7%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

These companies operate in different sectors (IMSR (Energy) and NNE (Industrials) and SMR (Utilities) and OKLO (Utilities)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.