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IMSR logo
IMSR
BWXT logo
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NNE logo
NNE
OKLO logo
OKLO
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Stock Comparison

IMSR vs BWXT vs NNE vs OKLO

Revenue, margins, valuation, and 5-year total return — side by side.

Live fundamentals10-year financials5-year price chart
IMSR
Terrestrial Energy Inc.

Regulated Electric

EnergyNASDAQ • US
Market Cap$625M
5Y Perf.-19.7%
BWXT
BWX Technologies, Inc.

Aerospace & Defense

IndustrialsNYSE • US
Market Cap$17.77B
5Y Perf.+110.5%
NNE
Nano Nuclear Energy Inc

Industrial - Machinery

IndustrialsNASDAQ • US
Market Cap$1.04B
5Y Perf.+235.7%
OKLO
Oklo Inc.

Regulated Electric

UtilitiesNYSE • US
Market Cap$10.57B
5Y Perf.+503.2%

IMSR vs BWXT vs NNE vs OKLO — Key Financials

Market cap, revenue, margins, and valuation side-by-side.

Company Snapshot
IMSR logoIMSR
BWXT logoBWXT
NNE logoNNE
OKLO logoOKLO
IndustryRegulated ElectricAerospace & DefenseIndustrial - MachineryRegulated Electric
Market Cap$625M$17.77B$1.04B$10.57B
Revenue (TTM)$0.00$3.38B$0.00$0.00
Net Income (TTM)$-46M$345M$-31M$-129M
Gross Margin16.8%
Operating Margin11.0%
Forward P/E41.3x
Total Debt$2M$2.02B$3M$1M
Cash & Equiv.$97M$503M$203M$788M

IMSR vs BWXT vs NNE vs OKLOLong-Term Stock Performance

Price return indexed to 100 at period start. Dividends excluded.

IMSR
BWXT
NNE
OKLO
StockMay 24Jun 26Return
BWX Technologies, I… (BWXT)100210.5+110.5%
Nano Nuclear Energy… (NNE)100335.7+235.7%
Oklo Inc. (OKLO)100603.2+503.2%

Price return only. Dividends and distributions are not included.

Quick Verdict: IMSR vs BWXT vs NNE vs OKLO

Each card shows where this stock fits in a portfolio — not just who wins on paper.

Bottom line: BWXT leads in 6 of 6 categories, making it the strongest pick for growth and revenue expansion and profitability and margin quality. This set spans 3 sectors — these stocks serve different portfolio roles, not just different price points.
🥇BWXT emerged as the overall leader. Track its performance:
IMSR
Terrestrial Energy Inc.
The Specific-Use Pick

In this particular matchup, IMSR is outpaced on most metrics by others in the set.

Best for: energy exposure
BWXT
BWX Technologies, Inc.
The Income Pick

BWXT carries the broadest edge in this set and is the clearest fit for income & stability and growth exposure.

  • Dividend streak 10 yrs, beta 1.88, yield 0.5%
  • Rev growth 18.3%, EPS growth 16.9%, 3Y rev CAGR 12.7%
  • 18.3% revenue growth vs OKLO's -125.2%
  • 10.2% margin vs IMSR's -1.0%
Best for: income & stability and growth exposure
NNE
Nano Nuclear Energy Inc
The Long-Run Compounder

NNE is the clearest fit if your priority is long-term compounding and sleep-well-at-night.

  • 383.2% 10Y total return vs BWXT's 474.2%
  • Lower volatility, beta 3.93, Low D/E 1.3%, current ratio 53.48x
  • Beta 3.93, current ratio 53.48x
Best for: long-term compounding and sleep-well-at-night
OKLO
Oklo Inc.
The Secondary Option

OKLO lags the leaders in this set but could rank higher in a more targeted comparison.

Best for: utilities exposure
See the full category breakdown
CategoryWinnerWhy
GrowthBWXT logoBWXT18.3% revenue growth vs OKLO's -125.2%
Quality / MarginsBWXT logoBWXT10.2% margin vs IMSR's -1.0%
Stability / SafetyBWXT logoBWXTBeta 1.88 vs IMSR's 4.60
DividendsBWXT logoBWXT0.5% yield; 10-year raise streak; the other 3 pay no meaningful dividend
Momentum (1Y)BWXT logoBWXT+39.6% vs IMSR's -66.7%
Efficiency (ROA)BWXT logoBWXT8.6% ROA vs IMSR's -21.0%, ROIC 10.1% vs -18.8%

IMSR vs BWXT vs NNE vs OKLO — Revenue Breakdown by Segment

How each company's revenue is distributed across its business units

Discover the Nuclear Energy Stocks Theme

These companies are key players in the Nuclear Energy Stocks ecosystem. See how they stack up against the rest of the sector.

Explore Theme
IMSRTerrestrial Energy Inc.

Segment breakdown not available.

BWXTBWX Technologies, Inc.
FY 2025
Government Operations Segment
73.4%$2.4B
Commercial Operations Segment
26.6%$853M
NNENano Nuclear Energy Inc

Segment breakdown not available.

OKLOOklo Inc.

Segment breakdown not available.

IMSR vs BWXT vs NNE vs OKLO — Financial Metrics

Side-by-side numbers across 4 stocks — who leads on profitability, valuation, growth, and risk.

BEST OVERALLBWXTLAGGINGOKLO

Income & Cash Flow (Last 12 Months)

NNE leads this category, winning 1 of 1 comparable metric.

BWXT and OKLO operate at a comparable scale, with $3.4B and $0 in trailing revenue.

MetricIMSR logoIMSRTerrestrial Energ…BWXT logoBWXTBWX Technologies,…NNE logoNNENano Nuclear Ener…OKLO logoOKLOOklo Inc.
RevenueTrailing 12 months$0$3.4B$0$0
EBITDAEarnings before interest/tax-$38M$458M-$44M-$172M
Net IncomeAfter-tax profit-$46M$345M-$31M-$129M
Free Cash FlowCash after capex-$242M$328M-$38M-$943M
Gross MarginGross profit ÷ Revenue+16.8%
Operating MarginEBIT ÷ Revenue+11.0%
Net MarginNet income ÷ Revenue+10.2%
FCF MarginFCF ÷ Revenue+9.7%
Rev. Growth (YoY)Latest quarter vs prior year+26.1%
EPS Growth (YoY)Latest quarter vs prior year-60.3%+20.7%+68.4%-167.6%
NNE leads this category, winning 1 of 1 comparable metric.

Valuation Metrics

Evenly matched — IMSR and OKLO each lead in 1 of 2 comparable metrics.
MetricIMSR logoIMSRTerrestrial Energ…BWXT logoBWXTBWX Technologies,…NNE logoNNENano Nuclear Ener…OKLO logoOKLOOklo Inc.
Market CapShares × price$625M$17.8B$1.0B$10.6B
Enterprise ValueMkt cap + debt − cash$530M$19.3B$842M$9.8B
Trailing P/EPrice ÷ TTM EPS-19.38x54.02x-23.66x-84.36x
Forward P/EPrice ÷ next-FY EPS est.41.26x
PEG RatioP/E ÷ EPS growth rate12.59x
EV / EBITDAEnterprise value multiple44.59x
Price / SalesMarket cap ÷ Revenue5.56x
Price / BookPrice ÷ Book value/share1.83x14.44x4.27x6.02x
Price / FCFMarket cap ÷ FCF60.17x
Evenly matched — IMSR and OKLO each lead in 1 of 2 comparable metrics.

Profitability & Efficiency

BWXT leads this category, winning 6 of 9 comparable metrics.

BWXT delivers a 27.9% return on equity — every $100 of shareholder capital generates $28 in annual profit, vs $-23 for IMSR. OKLO carries lower financial leverage with a 0.00x debt-to-equity ratio, signaling a more conservative balance sheet compared to BWXT's 1.63x. On the Piotroski fundamental quality scale (0–9), IMSR scores 5/9 vs OKLO's 4/9, reflecting solid financial health.

MetricIMSR logoIMSRTerrestrial Energ…BWXT logoBWXTBWX Technologies,…NNE logoNNENano Nuclear Ener…OKLO logoOKLOOklo Inc.
ROE (TTM)Return on equity-23.4%+27.9%-7.6%-8.6%
ROA (TTM)Return on assets-21.0%+8.6%-7.5%-8.3%
ROICReturn on invested capital-18.8%+10.1%-2.6%-24.7%
ROCEReturn on capital employed-16.7%+10.8%-35.8%-15.7%
Piotroski ScoreFundamental quality 0–95544
Debt / EquityFinancial leverage0.01x1.63x0.01x0.00x
Net DebtTotal debt minus cash-$95M$1.5B-$200M-$787M
Cash & Equiv.Liquid assets$97M$503M$203M$788M
Total DebtShort + long-term debt$2M$2.0B$3M$1M
Interest CoverageEBIT ÷ Interest expense-5.45x10.88x
BWXT leads this category, winning 6 of 9 comparable metrics.

Total Returns (Dividends Reinvested)

NNE leads this category, winning 3 of 6 comparable metrics.

A $10,000 investment in NNE five years ago would be worth $48,324 today (with dividends reinvested), compared to $3,332 for IMSR. Over the past 12 months, BWXT leads with a +39.6% total return vs IMSR's -66.7%. The 3-year compound annual growth rate (CAGR) favors NNE at 69.1% vs IMSR's -30.7% — a key indicator of consistent wealth creation.

MetricIMSR logoIMSRTerrestrial Energ…BWXT logoBWXTBWX Technologies,…NNE logoNNENano Nuclear Ener…OKLO logoOKLOOklo Inc.
YTD ReturnYear-to-date+15.8%+6.9%-9.2%-21.9%
1-Year ReturnPast 12 months-66.7%+39.6%-27.6%-7.2%
3-Year ReturnCumulative with dividends-66.7%+190.7%+383.2%+309.6%
5-Year ReturnCumulative with dividends-66.7%+212.1%+383.2%+309.6%
10-Year ReturnCumulative with dividends-66.7%+474.2%+383.2%+309.6%
CAGR (3Y)Annualised 3-year return-30.7%+42.7%+69.1%+60.0%
NNE leads this category, winning 3 of 6 comparable metrics.

Risk & Volatility

BWXT leads this category, winning 2 of 2 comparable metrics.

BWXT is the less volatile stock with a 1.88 beta — it tends to amplify market swings less than IMSR's 4.60 beta. A beta below 1.0 means the stock typically moves less than the S&P 500. BWXT currently trades 80.2% from its 52-week high vs IMSR's 27.8% drawdown — a narrower gap to the peak suggests stronger recent price momentum.

MetricIMSR logoIMSRTerrestrial Energ…BWXT logoBWXTBWX Technologies,…NNE logoNNENano Nuclear Ener…OKLO logoOKLOOklo Inc.
Beta (5Y)Sensitivity to S&P 5004.60x1.88x3.93x3.95x
52-Week HighHighest price in past year$27.16$241.82$60.87$193.84
52-Week LowLowest price in past year$5.33$133.84$18.95$44.88
% of 52W HighCurrent price vs 52-week peak+27.8%+80.2%+41.2%+31.3%
RSI (14)Momentum oscillator 0–10045.846.244.242.9
Avg Volume (50D)Average daily shares traded3.0M915K2.6M13.4M
BWXT leads this category, winning 2 of 2 comparable metrics.

Analyst Outlook

Insufficient data to determine a leader in this category.

Analyst consensus: BWXT as "Buy", NNE as "Buy", OKLO as "Buy". Consensus price targets imply 99.4% upside for NNE (target: $50) vs 16.0% for BWXT (target: $225). BWXT is the only dividend payer here at 0.52% yield — a key consideration for income-focused portfolios.

MetricIMSR logoIMSRTerrestrial Energ…BWXT logoBWXTBWX Technologies,…NNE logoNNENano Nuclear Ener…OKLO logoOKLOOklo Inc.
Analyst RatingConsensus buy/hold/sellBuyBuyBuy
Price TargetConsensus 12-month target$13.50$225.00$50.00$91.50
# AnalystsCovering analysts16313
Dividend YieldAnnual dividend ÷ price+0.5%
Dividend StreakConsecutive years of raises10
Dividend / ShareAnnual DPS$1.01
Buyback YieldShare repurchases ÷ mkt cap0.0%+0.2%0.0%0.0%
Insufficient data to determine a leader in this category.
Key Takeaway

NNE leads in 2 of 6 categories (Income & Cash Flow, Total Returns). BWXT leads in 2 (Profitability & Efficiency, Risk & Volatility). 1 tied.

Best OverallBWX Technologies, Inc. (BWXT)Leads 2 of 6 categories
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IMSR vs BWXT vs NNE vs OKLO: Key Questions Answered

9 questions · data-driven answers · updated daily

01

Is IMSR or BWXT or NNE or OKLO a better buy right now?

For growth investors, BWX Technologies, Inc.

(BWXT) is the stronger pick with 18. 3% revenue growth year-over-year, versus -100. 0% for Terrestrial Energy Inc. (IMSR). BWX Technologies, Inc. (BWXT) offers the better valuation at 54. 0x trailing P/E (41. 3x forward), making it the more compelling value choice. Analysts rate BWX Technologies, Inc. (BWXT) a "Buy" — based on 16 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.

02

Which is the better long-term investment — IMSR or BWXT or NNE or OKLO?

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: BWXT returned +474. 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.

03

Which is safer — IMSR or BWXT or NNE or OKLO?

By beta (market sensitivity over 5 years), BWX Technologies, Inc.

(BWXT) is the lower-risk stock at 1. 88β versus Terrestrial Energy Inc. 's 4. 60β — meaning IMSR is approximately 144% more volatile than BWXT relative to the S&P 500. On balance sheet safety, Oklo Inc. (OKLO) carries a lower debt/equity ratio of 0% versus 163% for BWX Technologies, Inc. — giving it more financial flexibility in a downturn.

04

Which is growing faster — IMSR or BWXT or NNE or OKLO?

By revenue growth (latest reported year), BWX Technologies, Inc.

(BWXT) is pulling ahead at 18. 3% versus -100. 0% for Terrestrial Energy Inc. (IMSR). On earnings-per-share growth, the picture is similar: BWX Technologies, Inc. grew EPS 16. 9% 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.

05

Which has better profit margins — IMSR or BWXT or NNE or OKLO?

BWX Technologies, Inc.

(BWXT) is the more profitable company, earning 10. 3% net margin versus 0. 0% for Oklo Inc. — meaning it keeps 10. 3% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: BWXT leads at 10. 1% versus 0. 0% for OKLO. At the gross margin level — before operating expenses — BWXT leads at 22. 9%, 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.

06

Is IMSR or BWXT or NNE or OKLO more undervalued right now?

Analyst consensus price targets imply the most upside for NNE: 99.

4% to $50. 00.

07

Which pays a better dividend — IMSR or BWXT or NNE or OKLO?

In this comparison, BWXT (0.

5% yield) pays a dividend. IMSR, NNE, OKLO do not pay a meaningful dividend and should not be held primarily for income.

08

Is IMSR or BWXT or NNE or OKLO better for a retirement portfolio?

For long-horizon retirement investors, BWX Technologies, Inc.

(BWXT) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (0. 5% yield, +474. 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 (BWXT: +474. 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.

09

What are the main differences between IMSR and BWXT and NNE and OKLO?

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

In terms of investment character: IMSR is a small-cap quality compounder stock; BWXT is a mid-cap high-growth stock; NNE is a small-cap quality compounder stock; OKLO is a mid-cap quality compounder stock. BWXT pays a dividend while IMSR, NNE, OKLO do not, making them suitable for different income and tax situations. 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.

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