Key facts
- It has raised $6.4M across 2 recorded rounds; the latest was Seed Round ($2.7M) in Dec 2023.
- Notable investors include Ford Launchpad for Innovative Technologies and Entrepreneurship.
- Antrum has filed 3 Form Ds with the SEC since 2023, most recently Jul 2025 ($3.7M sold to 5 investors).
- Status: Privately Held (backing).
- ·Post-money valuations for all 2 rounds
- ·The complete investor list — 1 names
- ·Watchlist + deal alerts for Antrum
Funding rounds
2 roundsAbout Antrum
Developer of a ventilation system designed for indoor air quality monitoring. The company offers centralized sensing technology that delivers accurate data on a scalable platform with an analytics dashboard, enabling schools, healthcare, and commercial industries to manage ventilation requirements.
- Sector
- Information Technology
- HQ
- Grand Rapids, MI, United States
- Founded
- 2012
- Employees
- 7
- Website
- antrum.com/
- Ownership
- Privately Held (backing)
Antrum doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in Antrum shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on Antrum in its N-PORT filings yet. We sweep new filings monthly.