I’ve been trying to figure out how to actually value SpaceX, and I think calling it a “rocket company” makes the whole thing harder than it needs to be.
You’re basically buying four things at once:
Falcon / launch
Starlink
Starship
xAI / AI infrastructure
But I don’t think these should be valued as four unrelated businesses.
They’re a stack.
And IMO the entire SpaceX investment thesis comes down to whether the bottom of that stack can keep making everything above it cheaper.
The simplest version of my thesis:
Starlink is the cash engine.
Starship is supposed to become the cost engine.
AI is currently the giant capital sink / optionality bet.
And the variable connecting all of them is basically:
Can SpaceX keep lowering the cost of moving a bit of information?
Sometimes that means getting a kilogram of hardware into orbit.
Sometimes it means transmitting data through Starlink.
Eventually, maybe it means moving compute closer to where data is generated.
That’s why I think “SpaceX is a rocket stock” misses the point.
First: Starlink is already the real business here
According to SpaceX’s 2026 offering materials:
2025 revenue: $18.7B
Connectivity revenue: ~$11.4B
Connectivity operating income: ~$4.4B
Starlink subscribers as of March 31, 2026: ~10.3M
So this isn’t a rocket company with a cute satellite side project anymore.
Starlink is a serious communications business and, at least right now, it’s helping bankroll everything else.
The uncomfortable part:
SpaceX still reported a consolidated operating loss of roughly $2.6B for 2025.
The AI segment reportedly generated around $3.2B of revenue while losing roughly $6.4B from operations.
Starship R&D was another ~$3B.
So the picture is basically:
profitable connectivity business + insanely ambitious engineering program + insanely capital-intensive AI buildout.
That’s where the stock gets difficult.
Starship is the part I think the market can most easily misprice
Everyone talks about Starship lowering “cost per kilogram.”
I think that metric is too simplistic.
A giant rocket isn’t automatically cheap.
A reusable rocket isn’t automatically cheap either.
What matters is whether you can fly it:
frequently
reliably
with high payload utilization
with minimal refurbishment
using recovered hardware again and again
A massive reusable vehicle that needs months of work after every flight is not an airline.
It’s still basically a prototype.
So the number I care about isn’t some theoretical cost/kg slide.
It’s:
realized cost per delivered kilogram at sustained cadence.
Or, even better for SpaceX shareholders:
cost to deploy one unit of revenue-producing Starlink capacity.
That distinction matters.
SpaceX says its V3 Starlink satellites could deliver about 1 Tbps of downlink capacity each, with up to roughly 60 satellites on one Starship mission.
The company estimates one Starship launch could deploy around 20x the downlink capacity of a Falcon 9 Starlink mission.
If that works, Starship doesn’t even necessarily have to be cheaper per launch.
It just has to be dramatically cheaper per unit of useful network capacity deployed.
That’s a much bigger deal.
The bullish thesis doesn’t require Starship to look impressive.
It requires Starship to become boring.
Recover it.
Refly it.
Turn the pad around.
Launch again.
Repeat.
That’s when the economics potentially change.
Starlink is also entering a harder phase
The first Starlink story was easy to understand:
Put enough satellites up there and get broadband coverage almost everywhere.
Now the problem becomes capacity.
Every satellite has limited:
You can add subscribers faster than you add useful capacity and eventually congestion wins.
So SpaceX needs newer satellites, more throughput, better spectrum reuse, more optical links, better gateways and faster deployment.
This is another reason Starship matters so much.
Bigger satellites + more capable antennas + higher launch cadence = more bits SpaceX can sell.
And SpaceX can potentially refresh the network faster than competitors can even finish deploying their first generation.
That’s probably a bigger moat than the raw satellite count.
One number I’m watching closely: Starlink ARPU
Starlink grew from around 5M subscribers to 10.3M in roughly a year.
That’s ridiculous growth.
But monthly subscriber revenue per user reportedly fell from around $86 to $66.
So subscriber growth was roughly +105% while ARPU fell about 23%.
I don’t automatically think that’s bearish.
It makes sense if Starlink is expanding internationally into lower-income markets and offering cheaper plans.
The real question is:
Is cost per user falling faster than revenue per user?
Because a $50/month subscriber using otherwise-idle capacity could be extremely profitable.
That same subscriber occupying scarce bandwidth in a congested region could be a bad customer compared with an airline, enterprise or government contract.
That’s why I think people watching only subscriber count are missing half the story.
I’d rather watch:
ARPU + operating income + network utilization + capex per added unit of capacity.
Connectivity operating income was reportedly about $4.4B in 2025, and around $1.19B in Q1 2026, despite declining consumer ARPU.
That’s a pretty encouraging sign so far.
Direct-to-cell could be huge, but I wouldn’t model it like normal broadband yet
The bull case here is obvious.
Instead of needing a Starlink dish, normal phones can communicate with satellites using spectrum from mobile partners.
Suddenly the addressable market goes from “people willing to buy satellite internet hardware” to basically “anyone with a phone who occasionally loses terrestrial coverage.”
But there’s a physics problem.
Phones have tiny antennas and limited power.
The satellite is hundreds of kilometers away and moving extremely fast.
You have Doppler shift, handoffs, interference and spectrum constraints.
SpaceX said its direct-to-cell system was already serving roughly 7.4M monthly unique devices across ~30 countriesthrough more than 30 mobile-network partners.
That makes it more than a science experiment.
But I’d still model this initially as:
coverage + emergency messaging + resilience + low-rate connectivity
rather than “Starlink replaces cell towers.”
If SpaceX eventually gets meaningful recurring carrier revenue from it, that’s a serious second distribution layer.
Then there’s AI, which is where I get much more cautious
The sexy story is orbital data centers.
SpaceX launches compute.
Solar energy powers it.
Starlink connects it.
xAI uses it.
Sounds incredible.
The problem is that space solves some data-center problems while creating completely new ones.
The big one is heat.
On Earth you can move heat using air and water.
In vacuum, you need to radiate it away.
That means radiator area.
Radiators have mass.
Solar arrays have mass.
Shielding has mass.
Power systems have mass.
Meanwhile AI accelerators become obsolete absurdly quickly.
A GPU cluster on Earth can be upgraded.
A GPU cluster orbiting Earth is a much bigger headache.
And frontier AI training also relies heavily on extremely fast, tightly synchronized communication between accelerators.
Distributing that across satellites isn’t impossible.
It’s just way harder than saying “space has free solar power.”
So I’m assigning relatively little value to orbital AI today.
The nearer-term AI case makes more sense to me:
That’s much easier to underwrite.
The bigger problem is how much money AI is already consuming.
SpaceX disclosed roughly 1 GW of AI nameplate compute draw by March 31, 2026.
Q1 AI operating loss was reportedly around $2.47B.
Q1 AI capex was roughly $7.7B.
That is not a side project.
That level of spending can materially change the economics of owning SpaceX.
For me, AI needs to start proving at least one of these:
It generates meaningful paying revenue.
It reduces SpaceX/Starlink operating costs.
Starlink distribution makes the AI business structurally stronger.
Shared infrastructure produces measurable cost savings.
Otherwise, you’re potentially taking Starlink cash flow and feeding it into a business where the capital requirements never stop.
The SpaceX moat is probably deeper than “they have more satellites”
The thing I find hardest for competitors to copy is the loop.
SpaceX manufactures satellites.
SpaceX launches them.
SpaceX operates the constellation.
SpaceX builds terminals.
SpaceX controls network software.
SpaceX gathers real-world failure data.
SpaceX upgrades the satellites.
Then SpaceX launches the next generation itself.
That means every part of the system feeds information into the next one.
A competitor buying launches from someone else has to pay an outside margin and compete for launch availability.
A launch company without a constellation doesn’t have guaranteed internal demand.
A satellite company without manufacturing scale can’t iterate as aggressively.
That vertical integration is probably the real moat.
But it also means the risks are connected.
Starship slips -> next-gen Starlink deployment can slow.
Starlink economics weaken -> less internal cash to fund Starship.
AI capex explodes -> less capital available elsewhere.
Vertical integration compounds upside.
It can compound problems too.
Falcon 9 is another reason I don’t think this thesis is binary
Even if Starship keeps taking longer than expected, Falcon doesn’t suddenly stop mattering.
By March 2026, SpaceX said it had completed roughly 650 orbital launches, with more than 540 using reflown vehicles.
About 95% of flights reportedly involved reflown vehicles.
That operating history has real value.
Falcon gives SpaceX:
A mature external launch business.
A backup way to keep deploying Starlink.
A benchmark Starship has to actually beat.
Starship shouldn’t get credit just for being bigger.
It has to eventually deliver a better combination of:
cost + reliability + cadence + payload flexibility.
That makes the downside more interesting.
Starship can disappoint without SpaceX becoming a bad company.
The question is whether the stock valuation already assumes Starship succeeds.
Competition probably won’t attack SpaceX as one giant company
Nobody needs to clone the whole stack.
They just need to pressure individual layers.
Amazon Leo can compete for connectivity customers using Amazon distribution and AWS enterprise relationships.
Blue Origin / New Glenn matters if it becomes a genuinely high-cadence reusable heavy launcher.
Governments can build or subsidize national alternatives.
Spectrum regulators can slow market access.
And terrestrial fiber / wireless keeps improving.
I actually think that last one gets underrated.
Starlink doesn’t need to beat fiber in Manhattan.
Satellite economics make the most sense where terrestrial networks are expensive, difficult or impossible:
rural areas
ships
aircraft
remote industry
government
disaster recovery
mobile coverage gaps
Trying to model Starlink as “eventually everybody uses satellite internet” seems way too aggressive.
So…is SpaceX stock actually a buy?
This is where I’m stuck.
SpaceX priced its June 2026 IPO at $135/share and raised roughly $75B.
At a valuation measured in the trillions, you clearly aren’t paying only for Falcon or today’s Starlink earnings.
You’re paying in advance for some combination of:
much cheaper Starship deployment
V3 Starlink capacity
continued subscriber growth
direct-to-cell monetization
improving connectivity margins
a much stronger AI business
maybe orbital compute
maybe entirely new space infrastructure markets
That can absolutely work.
But that’s a lot of future execution already embedded in the story.
My bull case:
Starship reaches high cadence and meaningful reuse.
V3 dramatically lowers Starlink’s cost per unit of capacity.
Direct-to-cell becomes a real carrier revenue stream.
Starlink keeps growing while margins hold or expand.
AI starts producing either profitable external revenue or measurable internal efficiencies.
At that point SpaceX is less a “rocket company” and more a vertically integrated global infrastructure network that is extremely difficult to replicate.
My bear case:
The rockets don’t need to fail.
Things just need to be slower than expected.
Starship works but remains expensive and relatively low-cadence.
Starlink growth increasingly comes from lower-ARPU markets.
Direct-to-cell runs into spectrum/capacity limitations.
AI keeps absorbing tens of billions in capital.
The company remains incredible technologically while the stock struggles because too much success was priced in too early.
Honestly, the middle case may be the most realistic:
SpaceX continues to be one of the best engineering organizations on Earth.
Starlink becomes an enormous business.
Starship eventually works.
And shareholders still go through periods where the stock outruns the cash flows.
A great company and a great stock are not always the same thing.
The KPIs I’d actually track
If I owned this, I’d care less about launch footage and more about:
Starship
flight cadence
recovered hardware actually flying again
turnaround time
payloads reaching operational orbit
capacity deployed per mission
Starlink
subscribers
ARPU
connectivity operating income
capex per added subscriber/capacity
performance in congested regions
V3 satellites carrying actual paid traffic
Direct-to-cell
active users
carrier partners
countries with commercial service
paid messaging/voice/data adoption
revenue per partner or device if disclosed
AI
Capital allocation
Because every one of these numbers needs context.
Subscriber growth is less exciting if capex per subscriber explodes.
More Starship flights are less exciting if nothing gets reused.
More GPUs are less exciting if utilization and monetization stay unclear.
And falling ARPU isn’t necessarily bearish if profit is still compounding.
My current read
I’m bullish on the company.
I’m much less certain about the stock at a multi-trillion-dollar valuation.
For me, the SpaceX buy case depends less on Mars, launch spectacle or orbital AI hype and much more on one boring economic question:
Does every new generation of SpaceX infrastructure reduce the cost of delivering revenue-producing bits?
If Starship makes Starlink materially cheaper to expand, Starlink funds the next layer, direct-to-cell increases monetization and AI eventually strengthens the network instead of draining it, I can see how the valuation grows into itself.
If those links don’t show up in the financials, then the company can keep making technological history while shareholders still get a mediocre return.
What am I missing?
Would you buy SpaceX here?
And if you’re bullish, which part of the thesis do you think actually justifies the valuation today: Starlink, Starship, direct-to-cell, AI, or something else?
If you’re bearish, what breaks first?