United States · Who invested in MainStem?
MainStem's investors include Merida Capital Partners/ Poseidon Asset Management.
201920202021
$2.2MSeries B$5.0MSeries C
United States · Series C startup
Who invested in MainStem
Funding summaryUpdated 26 Oct 2026
$7.2Mraised across 2 rounds since 2018, from 2 sources
$2.2MSeries B$5.0MSeries C
- Latest round
- Series C, $5.0MAug 2021
- Step-upi
- 2.3×
- Investors
- 1
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series B, $2.2M May 2018
- Biggest round
- $5.0M Series C · Aug 2021
- Between rounds
- 3.2 years from the last two
The rounds
- Aug 2021Series C$5.0M
No investor was named in the report.
Source recordedSEC filing: $5.0M sold, first sale Sept 2021
- May 2018Series B$2.2M1 new
- Merida Capital Partners/ Poseidon Asset Management
Reported by FinSMEsSEC filing: $2.0M sold, first sale Jul 2018
Quick answers about MainStem
How much has MainStem raised?
MainStem has raised $7.2M across 2 rounds since 2018.
When did MainStem last raise?
MainStem's most recent round was a Series C of $5.0M in Aug 2021.
What was MainStem's biggest round?
Its most recent round, $5.0M in Aug 2021, is also its largest on record.
Who backed MainStem first?
MainStem's first round on record, in May 2018, was backed by Merida Capital Partners/ Poseidon Asset Management.
What stage is MainStem at?
MainStem's latest named round is a Series C, in Aug 2021.
Where is MainStem based?
MainStem is based in the United States.
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