United States · 
Who invested in Membrion?
Membrion's investors include National Science Foundation, Safar Partners, Indico Capital Partners, Sierra Angels and Bellingham Angel Investors, and 1 more on record.
2019202020212022202320242025
$2.3MSeed$20MSeries B
United States · Series B startup
Who invested in Membrion
Funding summaryUpdated 26 Oct 2026
$22Mraised across 2 rounds since 2018, from 2 sources
$2.3MSeed$20MSeries B
- Latest round
- Series B, $20MOct 2025
- Step-upi
- 8.9×
- Investors
- 6
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Seed, $2.3M Dec 2018
- Biggest round
- $20M Series B · Oct 2025
- Between rounds
- 6.8 years from the last two
The rounds
- Oct 2025Series B$20M3 new
Source recordedSEC filing: $20M sold, first sale Jun 2025
- Dec 2018Seed$2.3M3 new
Sierra Angels- Bellingham Angel Investors
- Sand Hill Angels/ E8
Reported by FinSMEsSEC filing: $1.5M sold, first sale Aug 2018
Founders and team
From Membrion's own website: 13 on the team.
- Greg NewbloomChief Executive Officer
- Andrea JohnstonChief Financial Officer
- Rachel MaloneChief of Staff
- Tom MitchellChief Operating Officer
- Emily RabeVP of Technology
- Aditya SalunkheSenior Engineer
- Chris KaneDirector of Products & Partnerships
- Krista RamirezDirector of Sales
- Michael FrankProduction Manager
- Michael MorelandSenior Customer Success Engineer
- Ryan FloresSenior Scientist
- Stephanie CandelariaStaff Engineer
- Unnati RaoStaff Engineer
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Seed2018Series B2025
National Science Foundation
Safar Partners
Indico Capital PartnersSierra AngelsBellingham Angel InvestorsSand Hill Angels/ E8
National Science FoundationSafar PartnersIndico Capital PartnersSierra AngelsBellingham Angel InvestorsSand Hill Angels/ E8Everyone who backed them
Bellingham Angel InvestorsAngel network1round
Sand Hill Angels/ E8no record of our own yet1round
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
These 2 firms list Membrion as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Membrion
How much has Membrion raised?
Membrion has raised $22M across 2 rounds since 2018.
When did Membrion last raise?
Membrion's most recent round was a Series B of $20M in Oct 2025.
What was Membrion's biggest round?
Its most recent round, $20M in Oct 2025, is also its largest on record.
Who backed Membrion first?
Membrion's first round on record, in Dec 2018, was backed by Sierra Angels, Bellingham Angel Investors and Sand Hill Angels/ E8.
What stage is Membrion at?
Membrion's latest named round is a Series B, in Oct 2025.
Where is Membrion based?
Membrion is based in the United States.
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