In-space transportation and orbital transfer vehicle developer founded by ex-SpaceX engineers
Impulse Space builds orbital transfer vehicles (OTVs) and in-space propulsion for last-mile delivery between orbits. Founded by SpaceX's first employee Tom Mueller, who designed the Merlin engine. Operating multiple Mira spacecraft, flying the Caravan rideshare program, and developing the Helios high-energy kick stage — selected by the U.S. Space Force as the first-ever upper stage prime on NSSL Phase 3 Lane 1.
Defense & Space📍 Redondo Beach, CAFounded 2021
Current Valuation
$5.6B
as of 2026-09-16
UNICORN
QL Price
$5.6B
0% vs last round
QuantLogix's current estimate for Impulse Space, published 2026-10-07 — in line with the last disclosed round of $5.6B (2026-09-16).
Confidence
medium
Basis
secondary led
What backs this price
Last disclosed round
$5.6B
2026-09-16
weight 0.96
Secondary market print
$5.6B
2026-06-27
weight 0.54
How this price has held up
No round has priced for Impulse Space since QuantLogix began publishing a price for it, so there is nothing to grade yet. The claim above is on the record from 2026-10-07 and will be graded against the next priced round. See the full accuracy record →
Which publicly-traded funds already hold it, what $10,000 buys, and whether any route is open to you.
Cite this price as QuantLogix QL Price, Impulse Space, 2026-10-07 (d0d5a72433727671).
The id pins this exact claim, so a citation stays checkable after the price moves.
Model estimate for research — not a quote, target price, or investment advice.
IPO Outlookprivate
Is Impulse Space going public?
No. Impulse Space has no imminent IPO plans on record. It is still private.
What is Impulse Space's valuation in 2026?
Impulse Space is valued at $5.6B as of 09/16/2026, set by its Series D extension ($308M, Sep 2026). That is the last confirmed mark, not a live price — private shares do not trade continuously.
Has Impulse Space filed an S-1?
No public S-1 is on file for Impulse Space.
Who are Impulse Space's investors?
Impulse Space's investors include 137 Ventures, BANNER VC, DFJ Growth, Linse Capital, Lux Capital, Valor Equity Partners and 3 more.
How much has Impulse Space raised?
Impulse Space has raised $1.3B in total across 3 disclosed rounds, most recently a Series D extension of $308M in Sep 2026.
Is Impulse Space publicly traded — can you buy Impulse Space stock?
No. Impulse Space is a private company — its shares are not listed on any exchange and there is no ticker. The routes to exposure are pre-IPO secondary marketplaces and funds (accredited investors), employee tender offers when the company runs one, and public companies with read-through exposure. QuantLogix maps every route it can verify for Impulse Space on its Pre-IPO Access Desk.
Answers are derived from the roster record shown on this page — filing status, last round and confirmed marks. Where the record is silent, the answer says so rather than guessing.
Company Profile
CEO
Tom Mueller
Founded
2021
HQ
Redondo Beach, CA
Employees
~600
Total Raised
$1.3B
Last Round
Series D extension — $308M (Sep 2026)
IPO Status
no imminent plans
Fundraising Status
Series D extension · $308M · 1 mo ago
no imminent plansTotal raised $1.3B3 disclosed rounds
Series D extension Impact
Round Size
$308M
Primary financing announced
Post-Money Valuation
$5.6B
Company-announced mark
Valuation Step-Up
+31.5%
vs Series D at $4.3B
Round / Post-Money
5.5%
New capital ÷ post-money
Disclosed Funding
$1.3B
Cumulative disclosed rounds
Step-up compares disclosed post-money valuations. Round / post-money is a financing-size ratio, not an ownership or dilution estimate.
Secondary Market
Implied price / share
$74.95
Open interest
24
Secondary price return by period
Implied per-share price from private secondary transactions, as of Jun 2026. This is a point estimate, not a quote — the feed carries no bid, ask or spread, and a secondary print is evidence of what someone paid on that date rather than a live market. Compare across every tracked name →
Growth & Valuation
Valuation across funding rounds
Capital raised per round
Charts built from publicly disclosed funding rounds and revenue estimates. Approximate, not real-time, not investment advice.
Funding History
Round
Amount
Date
Lead Investor
Post-Money
Series D extension
$308M
Sep 2026
—
$5.6B
Series D
$500M
Jun 2026
137 Ventures & BANNER VC
$4.3B
Series C
$294.53M
Jun 2025
Linse Capital
—
Vertical Intelligence — Defense / Aerospace
Federal awards
9
prime contracts, last 36 months
Obligated
$58.83M
top: Department of Defense
Largest award
$28.31M
Department of Defense
Latest award
2026-09-30
Largest award: IMPULSE SPACE SBIR PHASE III (FA880925CB001)
Name-verified against recipient "IMPULSE SPACE, INC." on USASpending.gov as of 2026-10-04. Prime awards only — subcontracts and classified work are not visible in the public registry. Verify on USASpending.gov ↗
Talent Signal
Hiring trend
▲ Hiring uptrend
+21% vs 2026-08
Open roles
164
via careers page
Product-build share
94%
engineering, research, product, design
Trajectory
expanding
heavy product build — 94% of open roles are product-building functions (engineering/research/product) — 83 of 164 open roles are hardware.
No tracked executive churn; open roles trending up.
Counted from Impulse Space's live job board as of 2026-09-16; role functions classified from posting titles. Open-role counts are an activity signal, not headcount. Refreshed monthly.
Founders & Key People
Tom Mueller
Investors
137 Ventures · BANNER VC · DFJ Growth · Linse Capital · Lux Capital · Valor Equity Partners · Founders Fund · RTX Ventures · DCVC
Products
Mira (OTV)
Helios (high-energy kick stage)
Caravan (rideshare program)
Electra (electric propulsion)
Competitors
Momentus · D-Orbit · Astroscale
SpaceDefenseOrbital TransferFounders Fund Backed
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2026-09-16. Refreshed quarterly.