Investor brief | Laurelin Technologies

Laurelin Technologies is a San Francisco company developing a containerized pulsed ²H–²H fusion reactor — a forty-foot transportable module built around a symmetric linear pulsed field-reversed configuration, direct electromagnetic conversion, and an AI control model integrated from the design stage. Behind-the-meter firm power, sited on the schedule of the host facility, without a new transmission interconnect.

I.What this is

The deployment window in which the argument is operative is narrow and is set by load. United States and global electricity demand is now growing at roughly 3–4 percent annually after a decade of slow growth; the hyperscaler interconnection queue has run faster than transmission build for three consecutive years. The window selects for firm power sited behind the meter, on the schedule of the host facility, without a new transmission interconnect. That is the architectural shape the load arithmetic selects for, and it is the shape the program targets.

Laurelin is not racing to first plasma at utility scale. The program is racing to a transportable, behind-the-meter module: a forty-foot ISO envelope, deuterium fuel, electromagnetic recovery, and the control model in the architecture from day one rather than bolted on after first plasma.

II.The round

Stage: Seed
Status: Open
Terms: By request
Use of funds: Bench articles for subsystem characterization · staged integration toward the first containerized module · six engineers, founder-led
Data room: Available on request under mutual NDA

FIG. I. Financing structure mapped against the eight-stage technical roadmap, S0 through S7, on a 36-month horizon. The YC / pre-seed bar (S0–S1) is shown filled to indicate the open round; later rounds are outline-only. Stage bands cover the program months on which each round's evidence accrues; bar overlaps indicate that successive rounds finance overlapping technical campaigns.

III.Stage plan and stage-gating

The program runs as eight sequenced stages, S0 through S7, across Month 0 to Month 36, each closed by a specific operating-record artifact rather than by an unfalsifiable milestone. The use-of-funds against the open round is sized to carry S0 and S1; subsequent stages are structured to retire named technical risks and to produce evidence artifacts a follow-on counterparty's technical reviewer can audit. First plasma is not a YC milestone; it is targeted by Month 14 on seed-funded execution. A prototype with the converter-coupled recovery chain measured at the protected boundary is available at the close of S5, Month 24, and is the milestone marked on Fig. I's sibling figure on the program brief. The technical detail behind each stage — component build order, bench articles, diagnostic chain — is on the program brief, and the full component-by-component technical roadmap memo is available in the data room under mutual NDA.

S0: IP and lab readiness · unlocks YC / pre-seed start.
S1: YC / pre-seed coil bench — 200 / 210 / 220 coil articles measured · unlocks seed tranche 1.
S2: Integrated non-nuclear magnetic bench · unlocks seed tranche 1 closure and authorisation to scope the first-plasma campaign.
S3: First plasma article · unlocks seed / seed-extension; first plasma by Month 14.
S4: Merge and compression article · unlocks Series A technical basis if successful.
S5: Converter-coupled pulse — measured recovered energy at protected takeoff · strategic / Series A proof point. Prototype available at Month 24.
S6: Repetition-rate and life testing · larger hardware round / non-dilutive financing.
S7: Shielded integrated reactor package · facility-scale capital; construction complete by Month 36.

Each gate's state is read against the published engineering-diligence plan, not against a marketing schedule. Qualified counterparties can request the plan and the bench-evidence packet against the current gate under mutual NDA.

IV.Vital statistics

Legal name: Laurelin Technologies Inc.
Founded: 2024
Headquarters: San Francisco, California
Program code: RDG-01-FRC
Fuel: ²H–²H (deuterium–deuterium)
Architecture: Symmetric linear pulsed field-reversed configuration · direct electromagnetic conversion
Controls: AI control model integrated from the design stage
Envelope: 40 ft (12.19 m) ISO container · transportable
Team: Six engineers · founder-led

V.Architectural commitments

Four commitments compose. The combination is the architecture the political and deployment surfaces together select for; no other public fusion program holds all four simultaneously.

Deuterium as terminal fuel. The ²H–²H commitment sources from ordinary seawater under ordinary dual-use export control. No tritium plant, no breeding blanket, no fission inventory. The supply-chain posture is independent of any other sovereign’s strategic inventory.

Compact pulsed FRC. A field-reversed configuration is a compact toroid without a central rod, with operating beta an order of magnitude higher than the tokamak range. The compactness commitment is a configurational property of the equilibrium, of which the container-class envelope is the engineering expression.

Direct electromagnetic conversion. Energy recovery electromagnetically at the protected boundary, on the natural per-pulse timescale, with the measurement record auditable per shot rather than averaged through a working-fluid loop. No steam cycle, no turbine.

Container-class packaging. Reactor-core hardware fits within a 40-foot ISO envelope, deployable inside the freight and licensing infrastructure that already exists. The envelope matches the post-2024 procurement vehicles (Project Pele, DIU ANPI) and the post-ADVANCE Act Agreement-State regulatory surface.

The full argument — including the ²H–²H Lawson penalty, the engineering-Q inequality, the FRC beta relation, and the public-physics scaling that supports each commitment — is in the public whitepaper. Read the whitepaper.

VI.What to expect

Bench articles for every measurement run upstream of integrated build. Nothing reaches integration that has not been characterized at the bench first. The container envelope forces honest decisions about every joint, every flange, every magnetic component. The control model handles real-time pulse timing budgets that historically required a control-room of operators.

The defensibility is in the integration, not in any single subsystem. Most components are commoditizable. The architecture is co-designed across coil families, pulsed-power switching, direct-conversion geometry, shielding, and the control model in a way that cannot be replicated by buying any one subsystem off the shelf.