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Portland startup funding

New funding rounds by startups based in Portland, Maine, from SEC Form D filings.

Updated Nov 10, 2026·Totals cover Form D filings Nov 13, 2025 to Nov 13, 2026

9 startups in Portland filed a Form D in the last 12 months. Together they reported $22.0M sold in 10 new rounds. The median round was $1.0M.

Startups
9
filed in 12 months
Reported new funding
$22.0M
10 rounds
Median round
$1.0M
new rounds
Top industry
by startups filing

Largest rounds

1
$6.5M14 investors
2
$4.7M8 investors
3
$3.2M31 investors
4
North Spore Holdings, Inc.
Not classified yetfiled Nov 2025
$2.6M12 investors
5
$1.0M1 investors
6
$1.0M10 investors
7
$1.0M2 investors
9
ElevenTwo, Inc.
Not classified yetfiled Apr 2026
$675K4 investors
10
$250K1 investors

Latest filings

Portland companies 27

27 companies
CompanyIndustryCityLatest filingLatest raise
Bluesonde Technologies, Inc.Water-monitoring buoys that send real-time data to researchers, aquaculture farms, utilities and port…
Energy & ClimatePortlandOct 29, 2026$1.0M
MedRhythms, Inc.Prescription music-based rehabilitation devices for people with stroke or Parkinson’s disease.
HealthcarePortlandOct 13, 2026$250K
Defendify, Inc.Cybersecurity platform with threat detection, response, and phishing simulations.
Enterprise SoftwarePortlandOct 13, 2026$6.5M
Premium Nutrition for Pets, Inc.DASH Dog Food sells fresh food for dogs.
Consumer & RetailPortlandAug 19, 2026$999K
HighByte, Inc.HighByte sells software that prepares industrial data for manufacturers to use in applications.
Enterprise SoftwarePortlandJul 6, 2026$4.7M
Boundless Diagnostics, Inc.Develops portable diagnostic testing technology for healthcare providers.
HealthcarePortlandJul 6, 2026$1.0M
Not classified yetPortlandApr 16, 2026$675K
Viable Gear, Inc.Makes seaweed-based twine for farmers and aquaculture operators.
Industrial & RoboticsPortlandFeb 26, 2026$280K
Not classified yetPortlandNov 18, 2025$2.6M
Not classified yetPortlandOct 8, 2025$1.8M
Not classified yetPortlandSep 17, 2025—
Not classified yetPortlandSep 16, 2025$3.4M
Not classified yetPortlandJun 27, 2025$1.5M
Energy & ClimatePortlandMar 21, 2025$1.0M
Not classified yetPortlandJan 8, 2025$1.2M
Not classified yetPortlandOct 2, 2024$1.0M
Not classified yetPortlandSep 26, 2024$696K
Not classified yetPortlandJul 19, 2024$187K
Not classified yetPortlandJun 14, 2024$60K
Consumer & RetailPortlandMay 29, 2024$450K
Not classified yetPortlandNov 30, 2023$3.0M
Consumer & RetailPortlandNov 20, 2023$250K
Industrial & RoboticsPortlandAug 1, 2023$5.1M
Industrial & RoboticsPortlandMay 1, 2023$2.3M
FinTech & Financial ServicesPortlandMar 31, 2023$3.5M
Not classified yetPortlandMar 28, 2023$6.9M
Industrial & RoboticsPortlandFeb 10, 2023$1.2M
How this page is built

Startups are the private companies counted as startups (see our startup funding data), placed by the address on their latest Form D. Registered-agent and virtual-office addresses are not counted as a location. Public companies, foreign issuers and business-combination filings are excluded.