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    CALCULATORiQ™
    SpaceX IPO 2026 series
    Companion to Pricing the Founder
    v0.1

    The Physics of the Premium

    Two of the milestones in the SpaceX founder-comp package are not financial. They are physical. This tool turns them into physics and money, names the binding constraint, and labels what is demonstrated technology versus aspiration.

    The tool does not return a flat possible or impossible. Every result is conditional on your assumptions and identifies the wall the design hits first.

    In vacuum, heat leaves only by radiation. Stefan–Boltzmann sets the wall: Q = ε σ A (T⁴ − T_env⁴). At hyperscale the cooling wall breaks first, and at the 100-TW milestone scale it breaks spectacularly. Adjust temperature, emissivity, rad-hardening derate, and launch cost to see where your design closes, becomes marginal, or fails.

    Inputs

    100 TW = 100,000,000 MW — the founder-comp milestone.

    arXiv 2507.14188: rad-hard parts run ~10–50× slower than ground GPUs.

    Starship target ~$500/kg (2028–29 cadence-contingent).

    Physics & cost outputs

    Breaks

    Binding constraint: Cost per delivered kWh

    Effective cost ~$262.48/kWh is >100× the terrestrial reference (~$0.07/kWh). No latency-tolerant workload pays this.

    Radiator area

    6.6k m²

    25 tennis courts

    Dry mass

    97.8 t

    Launch $48.9M

    Effective compute

    3.13 EF

    after 20× derate

    Total program

    $4.0B

    7-yr life

    Cost per delivered kWh

    $262.48vs ~$0.07/kWh terrestrial

    Terrestrial reference for a 1 GW data centre: ~$14.1B. Orbital reference (SatNews/MEXC): ~$42.4B per 1 GW.

    Latency
    Only training, batch, rendering — interactive workloads exclude themselves.

    Lifespan
    Total ionising dose + thermal cycling drive ~7-year replacement cadence.

    Editorial independence

    Cabier has no commercial relationship to SpaceX, its underwriters, its competitors, or any party with a position in SPCX. This analysis is editorially independent. Figures are compiled from public sources as of June 2026.

    Regulatory disclaimer

    This tool is for educational and illustrative purposes only. It is not investment advice, a recommendation, or a valuation opinion. Outputs depend entirely on user assumptions and do not predict future prices. SpaceX securities involve substantial risk, including the risk of total loss. Consult a licensed financial professional. Figures are estimates compiled from public sources as of June 2026.