Clearsky Advisors LLCFirm match from fund name (lower confidence)
Mainspring Funding II LLC
Raising
Raising: Form D filed Jul 2026 reports amount sold below target
- Vintage
- 2026
- Fund size
- $2.93M to $20M (Form D)
- Stages
- Not stated
- Sectors
- Cybersecurity, Energy
- Regions
- Not stated
01 · Thesis
ClearSky is a venture capital and growth equity firm investing in innovative companies in the cybersecurity and energy transition sectors, focusing on technology solutions that power the energy transition and disruptive cybersecurity technologies.Inferred from the firm's website
02 · Initial check
$29K to $333K (estimated from fund size)
Estimated from Form D: $2.93M sold of a $20M target
03 · Who to approach
Named on this fund's Form D
- Alex Weiss, CEO, Co-Founder & Managing Partner
- James Huff, Co-Founder & Managing Partner
04 · Deals
No deals attributed to this fund yet.
05 · Evidence
Firm-wideClearSky is a venture capital and growth equity firm investing in innovative companies in the cybersecurity and energy transition sectors.
ClearSky is a venture capital and growth equity firm investing in innovative companies in the cybersecurity and energy transition sectors
https://www.clear-sky.com/
06 · Sources
Last verified: Oct 28, 2026