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Company pair · Aerospace & Defense
VS

Allen Control Systems vs Sierra Space

Aerospace & Defense Both private US-headquartered No Canborsa market

This comparison puts Allen Control Systems next to Sierra Space within aerospace-defense on size, funding and trajectory.

On this pageSide by sideValuation marksWhat each disclosesVerdictFAQ
Sierra SpacePRIVATE · US
VS
Last valuation$2.2B$8B
Basis Post-money Post-money
As ofMay 2026Mar 2026
Founded20182021
Employees≈201≈2,000
On CanborsaNo marketNo market
At a glance
$2.2B
Allen Control SystemsPost-money, Series B · May 2026
$8B
Sierra SpacePost-money, Series C · Mar 2026
3.64×
GapBoth post-money, 2 months apart
0 of 2
On CanborsaNeither company has a market
VS
Head-to-head · field by field

Allen Control Systems vs Sierra Space — side by side

Field
Allen Control SystemsPRIVATE · FOUNDED 2018
Sierra SpacePRIVATE · FOUNDED 2021
VS
Last valuation
$2.2B Post-money
$8B Post-money
Valuation date
26 May 2026
1 Mar 2026
Valuation basis
Post-money
Post-money
Latest round
Series B
Series C
Round size
$200M
$550M
Round lead
Smash Capital
LuminArx Capital Management
Named investors
Smash Capital Craft Ventures Rally Ventures Inspired Capital
LuminArx Capital Management General Atlantic Coatue Moore Strategic Ventures
Founded
2018
2021
Employees (est.)
≈201
≈2,000
Sector & HQ
Defense Technology · 🇺🇸 US
Aerospace / commercial spaceflight and defence · 🇺🇸 US
Status & market
Private — no Canborsa market
Private — no Canborsa market
Valuation · both companies on one scale

Valuation marks

Each bar is the last disclosed mark — $2.2B for Allen Control Systems (post-money, May 2026) and $8B for Sierra Space (post-money, Mar 2026).

$2.2BPost-money · May 2026
Sierra Space
$8BPost-money · Mar 2026
ALLEN CONTROL SYSTEMS · $2.2B · MAY 2026SIERRA SPACE · $8B · MAR 2026
Allen Control Systems vs Sierra Space · what each company discloses

What each company discloses, and what it leaves out

Allen Control SystemsPRIVATEAerospace & Defense · US · 2018
+Last disclosed mark $2.2B — post-money, May 2026.
+Founded 2018 .
+≈201 employees.
+Latest round: Series B, $200M raised, led by Smash Capital.
Sierra SpacePRIVATEAerospace & Defense · US · 2021
+Last disclosed mark $8B — post-money, Mar 2026.
+Founded 2021 .
+≈2,000 employees.
+Latest round: Series C, $550M raised, led by LuminArx Capital Management.
Verdict

Verdict

The $2.2B tells you…
What an investor paid for newly issued shares — a primary round, priced post-money.
How much capital arrived with it:$200M, led by Smash Capital in May 2026.
A dated print: it moves only when a newer round is announced.
The $8B tells you…
What an investor paid for newly issued shares — a primary round, priced post-money.
How much capital arrived with it:$550M, led by LuminArx Capital Management in Mar 2026.
A dated print: it moves only when a newer round is announced.

Both marks are post-money, so 3.64× compares like with like. Both are private: there is no public quote and no Canborsa market on either name.

Frequently asked questions

Are Allen Control Systems and Sierra Space in the same sector?›

Allen Control Systems' sector is Defense Technology; Sierra Space's sector is Aerospace / commercial spaceflight and defence.

How do Allen Control Systems and Sierra Space compare in valuation?›

Allen Control Systems was last valued at $2.2B in May 2026, and Sierra Space at $8B in March 2026.

Who are the lead investors in Allen Control Systems and Sierra Space?›

Allen Control Systems' lead investors include Smash Capital, and Sierra Space's include LuminArx Capital Management.

Which was founded first, Allen Control Systems or Sierra Space?›

Allen Control Systems launched in 2018; Sierra Space launched in 2021.

Is Allen Control Systems or Sierra Space a public company?›

Allen Control Systems' status is private; Sierra Space's status is private.

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