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Boulder startup funding

New funding rounds by startups based in Boulder, Colorado, from SEC Form D filings.

Updated Nov 11, 2026·Totals cover Form D filings Nov 13, 2025 to Nov 13, 2026

34 startups in Boulder filed a Form D in the last 12 months. Together they reported $345.8M sold in 34 new rounds. The median round was $2.5M.

Startups
34
filed in 12 months
Reported new funding
$345.8M
34 rounds
Median round
$2.5M
new rounds
Top industry
by startups filing

Largest rounds

1
$125.0M8 investors
2
$29.4M83 investors
3
Alta Resource Technologies, Inc.
Not classified yetfiled Dec 2025
$28.3M17 investors
4
$25.9M17 investors
5
RADICL Defense, Inc.
Not classified yetfiled Feb 2026
$20.9M16 investors
6
Arpeggio Biosciences, Inc.
Not classified yetfiled Nov 2025
$20.0M12 investors
7
Afference Inc.
Not classified yetfiled Dec 2025
$15.3M19 investors
8
$12.9M10 investors
9
Mesa Quantum Systems, Inc.
Not classified yetfiled Jan 2026
$11.2M7 investors
10
Credible Data, Inc.
Not classified yetfiled Feb 2026
$10.3M29 investors

Latest filings

Boulder companies 102

102 companies
CompanyIndustryCityLatest filingLatest raise
Not classified yetBoulderMar 11, 2025$1.4M
Consumer & RetailBoulderMar 10, 2025$10K
Not classified yetBoulderFeb 25, 2025$4.1M
Not classified yetBoulderFeb 12, 2025$29.9M
Not classified yetBoulderJan 2, 2025$180.4M
Not classified yetBoulderJan 2, 2025$3.1M
Energy & ClimateBoulderDec 31, 2024$11.2M
Not classified yetBoulderOct 23, 2024$2.4M
Not classified yetBoulderOct 22, 2024$302K
Not classified yetBoulderOct 11, 2024$4.1M
Not classified yetBoulderAug 27, 2024$5K
Not classified yetBoulderAug 26, 2024$116K
Not classified yetBoulderAug 26, 2024$21.1M
Biotech & PharmaBoulderAug 20, 2024$15.9M
Not classified yetBoulderAug 20, 2024$150K
Not classified yetBoulderJul 29, 2024$40K
Biotech & PharmaBoulderJul 22, 2024$4.9M
Not classified yetBoulderJun 28, 2024$505K
Not classified yetBoulderJun 26, 2024$2.3M
Not classified yetBoulderJun 5, 2024$75K
Not classified yetBoulderMay 16, 2024$21.0M
Not classified yetBoulderMay 10, 2024$222.4M
Not classified yetBoulderApr 29, 2024$4.0M
Not classified yetBoulderApr 24, 2024$500K
Energy & ClimateBoulderApr 11, 2024$69.9M
Not classified yetBoulderApr 3, 2024$4.0M
Not classified yetBoulderMar 1, 2024$554K
Not classified yetBoulderFeb 26, 2024$3.5M
Biotech & PharmaBoulderFeb 14, 2024$150K
Not classified yetBoulderNov 29, 2023$5.9M
Food & AgricultureBoulderOct 31, 2023$700K
Biotech & PharmaBoulderOct 11, 2023$52.2M
Not classified yetBoulderSep 29, 2023$65K
Not classified yetBoulderAug 29, 2023$250K
Biotech & PharmaBoulderAug 28, 2023$7.3M
Not classified yetBoulderJun 5, 2023$9.9M
Energy & ClimateBoulderMay 30, 2023$1.0M
Not classified yetBoulderMay 19, 2023$110K
Not classified yetBoulderApr 21, 2023$7.7M
HealthcareBoulderApr 17, 2023$7.9M
Not classified yetBoulderApr 6, 2023$4.8M
Biotech & PharmaBoulderApr 3, 2023$53.7M
Not classified yetBoulderMar 23, 2023$5.3M
HealthcareBoulderMar 17, 2023$5.1M
Biotech & PharmaBoulderMar 7, 2023$62.4M
Not classified yetBoulderFeb 8, 2023$26.3M
Not classified yetBoulderFeb 8, 2023$1.6M
Not classified yetBoulderFeb 1, 2023$34.9M
Biotech & PharmaBoulderJan 18, 2023$5.9M
Biotech & PharmaBoulderJan 6, 2023$11.3M
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.