Insurance: The Silent Governor

When people ask what limits the space economy, they usually answer in kilograms and dollars per kilogram. Launch cost is the number everyone knows. It is not the number that decides.

The number that decides is smaller and stranger. Somewhere around three hundred million dollars.

That is the figure Gallagher's space team put on competitive capacity in April 2026, meaning the amount underwriters will actively compete to write on one risk, as distinct from the much larger theoretical capacity they could assemble for the right one. Three hundred million dollars is the level at which the market leans in. The same report carries a detail that matters more than the headline. New technology, unique risks and difficult risks sit well below that level.

Now hold that against what the same market insures. SpainSat NG-2, declared a total loss after an anomaly in December 2025, was insured for more than four hundred million dollars. One satellite, and more than the market will readily compete for.

A market that small, protecting assets that large, does not merely price the space economy. It sets its perimeter. A mission that cannot be insured at a rational premium is a mission a lender will not finance and a board will not approve, whatever the engineering case. The limit on orbital activity is not the thrust of a rocket. It is the size of a line an underwriter will sign.

I set out the six constraints in the opening essay of this series (The Unpriced, Uninsured, Unmeasured Space Economy). Insurance is the first, and it is the least discussed. This piece is about how that room works, what it is doing in 2026, and why its decisions reach further than its premiums.

What insurance actually does

Insurance is not a cost. It is a translation.

An engineer describes risk as a distribution of outcomes. A financier cannot lend against a distribution. Insurance converts that distribution into a number with a signature on it, and a number is something a treasurer can book, a bank can lend against, and a board can approve. The premium is the price of that translation, and the price is the only public statement anyone makes about how dangerous a thing is.

This has a consequence that is easy to miss. When the market will not translate your risk, you have not been told your mission is likely to fail. You have been told that nobody will state a price. Those are different statements, and the second is more damaging, because it cannot be argued with. There is no counter model to submit. There is no appeal.

So the first way insurance governs is by deciding what can be discussed in financial terms at all.

The 2026 market, and why a soft market is not a safe one

The headline for 2026 is good news for buyers, and it carries the risk inside it.

Capacity rose. Gallagher reported in April that theoretical capacity for 2026 was up by roughly one hundred million dollars year on year, an increase of more than fifteen percent, with competitive capacity holding near the three hundred million mark. Those commitments were secured just ahead of the SpainSat loss landing, which is worth remembering a paragraph from now. Rates on prime in-orbit business were falling. Launch pricing continued to improve.

By July the same team had five more things to report. WhiteCap had joined Phemis, AESIR and Hive in underwriting space risk. Gallagher estimates more than seventy million dollars of theoretical capacity was added to the market during the year. HDI Global had announced its departure from the class in May. The only significant claim since SpainSat was AST SpaceMobile's BlueBird 7, lost on an unsuccessful Blue Origin launch in April and insured for about thirty million dollars. And several insured satellites were carrying anomalies under review.

So through the first half of 2026 the class gained capacity, lost a carrier, and took one thirty million dollar claim while warning that several insured satellites were already showing anomalies whose cost it could not yet price. That is what a confident market looks like from the inside. It is also what a short memory looks like.

Behind the softening sits one loss. SpainSat NG-2 was declared a total loss after a December 2025 anomaly. Gallagher puts the insured value at over four hundred million dollars, and puts the effect on the 2025 underwriting loss ratio for the whole class at a move from roughly fifteen percent to roughly seventy five percent. One satellite. Sixty points across an entire class.

Read that as an economist, because the arithmetic is the argument. If one loss of that size moves a ratio by sixty points, that loss was worth about sixty percent of the year's premium income, and annual premium for the whole class is somewhere around six to seven hundred million dollars. That is the entire revenue line of the business that insures the space economy. One satellite is worth more than half of what the whole class collects in a year.

There is a second way to see the same fragility. In its final update for 2025, before the SpainSat notice arrived, Gallagher projected the year would deliver about five hundred million dollars of net underwriting profit to insurers. The loss that landed days later was worth roughly four fifths of that projection. In April, Gallagher still expected 2025 to deliver a positive result. What the loss did was turn a very good year into a thin one inside a week.

The ratio that matters here is not premium to loss. It is capacity to exposure. The market will readily compete to write around three hundred million dollars, and the largest risks in the class are bigger than that. So above that line, a mission stops being something the market competes to write. It becomes something assembled, line by line, from nearly every willing underwriter in the world, with the total tested against the sum insured. Gallagher says as much: maximum theoretical capacity is very rarely deployed, and capacity for any given risk is decided case by case.

That is the structure of this business. A class that can make half a billion dollars in a good year can lose most of it on one satellite, and the amount it will readily risk on any single spacecraft is smaller than the value of that spacecraft.

The softness in 2026 has a second cause, and it is the more interesting one. Gallagher projected in April that premium income for 2026 would contract significantly from 2025. Two reasons were given. A relatively low number of large geostationary satellites slated for launch. And a continuing lack of buyer appetite for insuring satellite constellations.

The missing buyer

Sit with that second reason. Constellations are the growth story of the space economy. They are also the segment where buyers are declining to buy.

The broker does not say why, and I want to be careful here. What follows is my reading of the structure, offered as an argument rather than a finding. Constellation risk is hard to underwrite because the assets are numerous, correlated, and share failure modes. One design flaw, one debris event, one systemic anomaly can impair many units at once. Insurance handles independent risk well and correlated risk badly, because a correlated loss arrives at every underwriter on the same day. A constellation is correlated risk wearing a hundred identical hats.

So the operators typically self insure, or they cover a fraction of the fleet, or they lean on the capital structure instead.

And this is where the theme of this series appears for the first time in a specific market. Insurance is a translator. It turns a distribution of outcomes into a price a financier can act on. When the insurance market will not translate a risk, capital looks for another translator. For constellations, that translator has been contracted demand: a customer who pays before the service exists, and whose commitment stands in for the actuarial statement nobody would make. That is why anchor customers matter so much more in space than in ordinary infrastructure. They are not just revenue. They are a substitute for a risk market that does not exist.

I will defend that as an argument, not a measurement. But it explains a pattern that is otherwise strange. The segment with the most growth is the segment with the least cover, and the gap is being carried by contracts written for a different purpose.

What the governor decides

Three decisions in that underwriting room reach further than the industry usually admits.

What counts as heritage. Underwriters price the new at a premium and the proven at a discount. When capacity is scarce, the definition of heritage narrows and the newest technology becomes the least insurable. That is not a comment on engineering quality. It is a comment on how a small pool of capital manages unfamiliarity, and it means the pace of innovation in orbit is partly set by how fast a risk becomes boring.

The rule runs in reverse when the market is hungry. In July, Gallagher reported that risks which had been difficult to place, mainly those carrying significant new technology, were being actively targeted by insurers who needed premium income and were willing to accept more technical risk to get it. Nothing about the technology had changed in three months. What changed was the underwriters' need for revenue. The governor moves, and it moves for its own reasons.

Whether a risk is correlated. A single satellite is insurable. A hundred identical satellites are a different instrument, and often an uninsurable one. As the industry moves from bespoke to production, more of its value sits in the correlated category, which is exactly where this market is weakest.

Who is allowed to fly at all. Some cover is required by law and some by contract, and the two are worth separating. A US launch licence carries a financial responsibility requirement: the licensee must cover third party liability, by insurance or by demonstrated financial responsibility, up to a maximum probable loss the regulator determines, capped by statute and by what the market will provide at reasonable cost. That is regulation, and it is the floor. Above it sits the contractual layer, where launch services agreements, financing covenants and customer procurement rules commonly require cover on the asset itself. That layer is a market, not a regulation, and it is where the constraint bites, because a lender who will not lend against an uninsured satellite does not need a rule to say so.

Two things this does not say

It does not say the market is failing. Capacity is rising, new underwriters entered in 2026, and pricing improved for buyers, even as one carrier left the class. Judged against a hard market, this is a good year.

It does not say premiums are the main cost of space. They are not. For most missions the premium is a modest fraction of mission cost. The cost that matters is the mission that never gets priced at all, and that cost never appears in any budget.

That asymmetry is the reason this constraint belongs first in this series. A price that is too high is visible and arguable. A risk that cannot be priced is invisible, and it removes options silently, one declined submission at a time.

What to watch

Three indicators, in order of how much they would change the picture.

Competitive capacity against insured values. If competitive capacity stays near three hundred million dollars while the insured value of the industry's assets keeps growing, the market is not scaling with the industry it protects. That gap is the constraint, and it is measurable every quarter.

Whether constellation cover becomes a product. The first underwriter who can price correlated fleet risk at scale would change the financing of every constellation company. Until then, constellation capital structures are doing work that insurance should be doing, and carrying risk they were not designed to carry.

The next large claim. One four hundred million dollar loss moved the class loss ratio sixty points. The response to the next one will tell you whether 2026 was a soft market or a briefly confident one. Gallagher flagged several anomalies under review as of July, and any one of them becoming a claim would answer the question faster than a renewal cycle can. The nearer test is the fourth quarter of 2026, which Gallagher singles out as a highly influential renewal window, with insurers under pressure to hit income targets in a year of falling premium. Buyers will learn in December how much of the softness was real.

The underwriting room is not a back office. It is the room where the industry's risk appetite is formally stated, in the only units that bind. If you want to know where the space economy will be in five years, do not start with the rockets. Start with what a few underwriters are willing to sign.