WindBorne
WindBorne Systems Inc.
WindBorne designs, builds, and operates a constellation of long-duration smart weather balloons targeting the most critical data in the atmosphere.
windbornesystems.com · Redwood City, CA
Funding event
The round itself, as filedInferred stageSeries B
Sold of offered$37.1M of $37.1M
Filed2026-08-17
Days since filing48
- Exemption claimed
- Rule 506(b)
- First-ever Form D
- No
- Date of first sale
- 2026-07-31
Investors
No investors named: Form D does not list them
Officers on the filing
Names and roles as filed; addresses are never stored- ANDREY SUSHKODirector
- JOHN DEANDirector
- NIKHIL BASU TRIVEDIDirector
- KAI MARSHLANDDirector
Health flags
Three flags, each with the raw inputs behind it · as of 2026-10-03UndersubscribedNot flagged100% sold2.1 months since first sale
Prior raiseNot flaggedPrior raise not known—
AmendedNot flaggedNo amendmentNo D/A on file
Open roles
On the employer's own careers page · checked 2026-09-2320
Pre-posting windowNot enough dataShown once this sector and stage have 20 observed lags from filing to first posting.
- Sensor Data EngineerOCT 3open 1 day
- Software Engineer, Machine Learning SystemsOCT 1open 3 days
- Flight Control OperatorSEP 24open 10 days
- Launch Operator - AlabamaSEP 24open 10 days
- Production ManagerSEP 24open 10 days
- Regional Field Manager (Central/South America)SEP 24open 10 days
- Embedded Electrical EngineerSEP 24open 10 days
- Firmware InternSEP 24open 10 days
- Electrical Engineer InternSEP 24open 10 days
- DC Government Affairs StrategistSEP 24open 10 days
- GTM LeadSEP 24open 10 days
- Mission Operations SpecialistSEP 24open 10 days
- Web Handling/Film Converting ExpertSEP 24open 10 days
- Chief of Staff to the CEOSEP 24open 10 days
- Constellation Software Engineer, InfrastructureSEP 24open 10 days
- Machine Learning Infrastructure EngineerSEP 24open 10 days
- Senior Manufacturing EngineerSEP 24open 10 days
- Launch Contractor - UruguaySEP 24open 10 days
- Lead Software Engineer - Gov PlatformsSEP 24open 10 days
- Full Stack Security Software EngineerSEP 24open 10 days
Also raised in Defense & space
Same sector, 28 days to 2026-10-04Varda Space IndustriesSeries D · $251M · El Segundo, CAQuietTwentySeries C+ · $131M of $131M · Arlington, VAHiring actively
10 rounds in Defense & space in the 28 days to 2026-10-03, against 7 in the 28 days before.