Key facts
- SirenOpt’s last known valuation is $15.5M (Oct 2025).
- It has raised $16.9M across 1 recorded rounds; the latest was Early Stage VC ($9.6M) in Jun 2024.
- Notable investors include US National Science Foundation, Climate Capital, University of California, Berkeley SkyDeck, Activate Global — 21 tracked in total.
- SirenOpt has filed 1 Form D with the SEC, most recently Jul 2024 ($9.6M sold to 17 investors).
- Status: Privately Held (backing).
- ·Post-money valuations for all 1 rounds
- ·The complete investor list — 21 names
- ·Watchlist + deal alerts for SirenOpt
Funding rounds
1 roundsAbout SirenOpt
Developer of a real-time sensing and software designed for the cost-effective manufacturing of thin films. The company's software offers cold atmospheric plasmas and physics-informed machine learning that collect critical manufacturing data and use that data to quantify and mitigate manufacturing variability in real time to improve manufacturing yield and performance, enabling the manufacturing industry to make real-time decisions in complex technical systems.
- Sector
- Information Technology
- HQ
- San Leandro, CA, United States
- Founded
- 2022
- Employees
- 41
- Website
- sirenopt.com/
- Ownership
- Privately Held (backing)
SirenOpt 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 SirenOpt 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 SirenOpt in its N-PORT filings yet. We sweep new filings monthly.