Firefly Aerospace Inc. (FLY): what the price requires

At today's price, Firefly Aerospace Inc. (FLY) is priced for today's economics sustained for ~40.0 years+. boothcheck doesn't publish a fair value or a price target; it shows what the price assumes, so you can judge whether that bar is too high.

Generated: 2026-07-19 · Source: https://boothcheck.com/report/FLY

Headline

FieldValue
TickerFLY
CompanyFirefly Aerospace Inc.
Current price$22.26/sh
CompositionLaunch revenue 18% / Spacecraft Solutions revenue 82%

What The Price Requires (Inversion)

The assumption today's price embeds, recovered by inverting the valuation.

FieldValue
Inversion basisrevenue-multiple
EV / sales paid18.7x
Steady-state operating margin assumed7.7%

Beyond 25%/yr sustained for 40 years; not resolvable as a revenue bet. The inversion reports a bound, not a solved point.

The company earns no operating profit yet; the inversion runs on the revenue multiple and an assumed steady-state margin.

Solve inputs: computed at a 17% cost of capital; growth searched up to the 25% self-funding ceiling.

Reconcile: at the x-ray's 9.3% required return this reads ~21.6 years; the models below use their own rates.

How unusual the bet is: extreme (limited comparison data)

ReferenceValue
sustained it ~5 years at this level30%
implied end-window share0%

Valuation X-Ray

Every valuation family lands below the price. The price therefore requires assumptions beyond what those standard frames encode.

How the valuation models price the stock relative to the market price. Price/FV above 1.0 means the market pays more than that lens defends (expensive); at or below 1.0 the lens can defend the price.

FamilyMedian price/FVModelsReads
Asset3.39x2expensive
Earnings—0—
Relative9.59x2expensive
Growth8.21x2expensive

Families that call it expensive: Asset, Relative, Growth

The models below discount at their own flat-beta convention rates (cost of equity 9.3%, WACC 9.3%); the inversion above states its own rate.

Per-Model Detail (n=6)

ModelFamilyFVPrice/FVApplicableMethodology
DCF Perpetual GrowthGrowth$0.00—noNegative/zero FCF — equity value floored at $0
DCF Exit MultipleGrowth$0.00—noNegative/zero FCF or EBITDA — equity value floored at $0
Relative ValuationRelative$2.329.59xyesP/S fallback (negative EPS): Sector P/S 2.0x × TTM revenue — excluded from consensus
Simple DDMGrowth——no—
Two-Stage DDMGrowth——no—
Simple Excess ReturnAsset$6.923.22xyesBook value floor: BV/sh $6.92, ROE negative
Two-Stage Excess ReturnAsset$6.233.57xyesBook value with convergence: BV/sh $6.92, ROE converges to ke
Discounted Future Market CapGrowth$15.121.47xyesRev $0.2B, growth 19% (input: historical growth; tapered), Terminal P/S: 9.7x / 12.0x / 14.3x (bear / base = today's held flat / bull, cap 12x)
Peter Lynch Fair ValueRelative$0.00—noNegative/zero EPS — earnings-based value floored at $0
Margin TrajectoryGrowth$1.4914.94xyesMargin ramp: -50% → 12% over 7yr, rev growth 19% (input: historical growth; tapered)
Earnings Power ValueEarnings——no—
Residual IncomeAsset——no—
Graham NumberAsset——no—
EV/EBITDA RelativeRelative——no—
FCF YieldEarnings——no—
SBC-Adj FCF YieldEarnings——no—
Ben Graham FormulaEarnings——no—
ROIC-Justified P/BAsset——no—
P/Sales SectorRelative$2.329.59xyesRevenue $0.18B × sector P/S 2.0x
PEG Fair ValueRelative——no—
Earnings YieldEarnings——no—
Funds From Operations MultipleRelative——no—
Clinical Phase NPVGrowth——no—
MertonAsset——no—
V5 Mechanical———no—

Solvency

FieldValue
Net cash$398.5m
Interest coverage-13.9x
Burning cashyes

Operating profit is negative or near zero and the company has no demonstrated through-cycle (mid-cycle) operating margin to normalize against, so years-to-repay cannot be computed honestly.

Bullet Takeaways

Bull Case

Take the bear's strongest point first and test whether the data answers it. The obvious objection to Firefly is that it is a money-losing space startup priced at many times its revenue, a category where most names never reach profit. That is true of the financials, and the bull case does not pretend otherwise. What the data does answer is whether the company has shown it can do the hard thing the category is built on. In 2025 Firefly's Blue Ghost lander reached the lunar surface and operated for roughly two weeks, the first fully successful commercial lunar landing. A great many space companies have raised capital on a deck; far fewer have put a working spacecraft on the Moon. That is the distinction the bull case stands on.

The revenue is now backed by contracts rather than ambition. The company reaffirmed a 2026 revenue target of $420 to $450 million with about 80% of that already booked and a backlog near $1.3 billion, and Q1 2026 set a record at $80.9 million. The backlog is not a soft pipeline; the 10-K explains that deferred revenue in backlog "consists of payments and billings that we have received in excess of revenue that we have recognized," meaning customers have already put cash behind the orders. The customer base skews toward defense and national-security work, which is less cyclical than commercial space and tends to fund development directly. That is a more durable demand profile than a pure commercial-launch startup.

The platform is widening, which is what separates a one-product launcher from a franchise. Alpha returned to orbit on its seventh flight, and the Alpha Block II upgrade introduced in early 2026 adds payload capacity and uses 3D-printed components to streamline manufacturing. The larger Eclipse vehicle, co-developed with Northrop Grumman and designed to lift 16,000 kg to low Earth orbit, is positioned as a domestic replacement for the Russian-engine-dependent Antares, with a first flight targeted in the late-2026 timeframe. If even part of that roadmap lands on schedule, Firefly moves from a small-rocket and lunar-services niche toward the medium-lift market where the larger defense and commercial budgets sit. The bet is on execution, and 2025 supplied the first real evidence the company can execute.

Bear Case

The bear case is a question of which baked-in revenue stream breaks first, because the price assumes nearly all of them hold. Today's price sits at roughly 36 times trailing revenue, a level no standard valuation method reaches: the asset value, the peer multiples, and even the forward-growth methods all land far below the price. To justify that, Firefly has to grow revenue faster than 25% a year for an extended period and eventually reach a positive operating margin from a business that currently runs deeply negative. The most fragile assumption is the timeline. The 2026 target leans on the first Eclipse flight, and the 10-K is explicit that if difficulties arise in "integration, and testing of launch operations, we may be unable to introduce Eclipse to the market, which could have an adverse impact on our business and projected growth," and that the path to market "may be impacted if Northrop Grumman is unable to approve" key milestones. The marquee growth vehicle depends on a partner's sign-off and a clean development run, neither of which is guaranteed.

Concentration magnifies any single slip. The 10-K discloses that the top five backlog customers accounted for about 81% of backlog at the end of 2025, and warns those customers "may change their ordering patterns or business strategy, be delayed in the fulfillment of their contractual obligations to us, reduce or cease their use of our services." A backlog that looks like $1.3 billion of certainty is in practice a handful of relationships. Launch itself is unforgiving: an Alpha booster was destroyed in a September 2025 ground-test anomaly, and the company cautions that an inability to operate Alpha at its anticipated launch rate could adversely impact results. One failed flight or one slipped customer program does not just dent a quarter; it resets the schedule the entire valuation is leaning on.

The balance sheet sets the clock. Firefly holds about $319 million of net cash, but it is burning cash at scale, with trailing operating losses near $300 million. That funds roughly a year of operations at the current burn before the company needs the revenue ramp to start covering costs or has to raise capital again, most likely by issuing shares that dilute existing holders. The price is not asking whether Firefly is a real space company; 2025 answered that. It is asking the market to underwrite an extreme growth-and-margin path, on a thin customer base, against a development schedule with real technical and partner risk, while the cash runway counts down. That is the most demanding end of the scale, and the price has left almost no room for the schedule to slip.

Valuation

Pinning a value on Firefly with standard arithmetic is the wrong exercise, and the model says so plainly: the company does not yet earn a normal operating profit, so the price is set against sales, and at roughly 36 times trailing revenue no valuation family reaches it. The asset lens, anchored on book value near $7 per share, sits far below the price. The peer-multiple lens, applying a sector price-to-sales near 2 times to about $180 million of revenue, lands lower still. Even the forward-growth method, which credits a revenue ramp and a margin recovery, does not get there. When every frame says expensive, the price is not a valuation conclusion; it is a bet beyond what any standard method supports.

What the price actually requires is worth stating in plain terms. To grow into today's level, Firefly has to compound revenue beyond 25% a year for a long stretch and eventually reach a positive operating margin from a business running deeply negative today. Historically only about 30% of comparable fast-growers sustained even a 25% pace for five years, and Firefly's required path is longer and steeper than that. The 86% year-to-date move in the stock is the market repricing the lunar-landing proof point and the backlog, not a re-rating toward any method's estimate.

Solvency is the binding constraint, not a footnote. With about $319 million of net cash and an operating loss near $300 million, the company is spending faster than it earns, and a years-to-repay figure cannot be computed honestly because there is no through-cycle operating profit to measure against. The cash on hand buys roughly a year at the current burn, after which the revenue ramp has to be carrying the costs or the company raises capital again. For a name like this the question is never the multiple. It is whether the next several launches happen on schedule and whether the cash lasts until the booked backlog converts to recognized revenue. Everything in the price rides on those two things.

Catalysts

Firefly's near-term story is a launch-and-program cadence against an ambitious revenue target. The company reaffirmed 2026 revenue guidance of $420 to $450 million, with about 80% already booked and a backlog around $1.3 billion, and reported record Q1 2026 revenue of $80.9 million. The growth is meant to come from more Alpha launches, scaling Blue Ghost lunar missions, expanding defense contracts, and new vehicles, so each successful flight is both an operational milestone and direct evidence for the guidance.

The most recent operational proof points are concrete. Alpha returned to orbit on its seventh flight from Vandenberg, and the stock rose on the result; the Alpha Block II upgrade introduced in early 2026 increases payload capacity and uses 3D-printed components to streamline production. Working against that, an Alpha booster intended for a prior flight was destroyed in a September 2025 ground-test anomaly, a reminder that the launch schedule is exposed to single-point technical failures.

The larger catalyst is Eclipse. Co-developed with Northrop Grumman and formerly called the Medium Lift Vehicle, Eclipse is designed to lift 16,000 kg to low Earth orbit and is positioned as a domestic replacement for the Antares rocket, with a first launch targeted in the late-2026 timeframe. That timeline is the single most watched item in the story, because Eclipse moves Firefly into the medium-lift market where larger budgets sit, and any slip in its development or in Northrop Grumman's milestone approvals would pressure both the growth narrative and the 2026 numbers.

Peer Cohorts (Per Segment, With Filing Citations)

Firefly Aerospace (single operating segment) (reported)

Methodology Note

Fundamentals sourced from SEC EDGAR filings. Current price from Databento. The priced-in inversion and valuation x-ray are computed by the boothcheck engine; narrative composed by AI from the structured data.

Sources

Firefly 2026 outlook, company guidance · Firefly Q1 2026 results and 2026 outlook · Firefly 2026 outlook · Firefly Alpha Flight 7 launch coverage · Spaceflight Now, September 2025

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