Segra Capital Management is an energy-focused investment firm headquartered in Palm Beach, Florida, founded in 2013. The firm invests globally in both public and private markets with a particular focus on nuclear power and related energy infrastructure.
100% of their portfolio is in Climate & Energy. Deal activity decreased year-over-year (1 deal in the last 12 months vs 2 prior).
Portfolio
3
Fund Size
—
Top Stage
Series D
Last 12 Mo
1
Team
Arthur Hyde
Partner and Portfolio Manager
John Katsingris
Investment Analyst
Adam Rodman
Founder and Chief Investment Officer
MF
Mike Fabiano
Chief Operating & Financial Officer
JK
John Katsingris
Investment Analyst
AR
Adam Rodman
Founder/Chief Investment Officer
AD
Arthur Dwight Hyde
Portfolio Manager
Portfolio Breakdown
Stage Distribution
Investment Activity
Portfolio
5 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 X Energy | Series D | $700M | Nov 2025 |
 General Fusion | Unknown | $22M | Aug 2025 |
| X Energy | Series C | — | Feb 2025 |
| General Fusion | Series E | — | Nov 2021 |
 Alva | Series A | — | — |
Top Co-Investors
Jane Street Capital2 shared
Emerson Collective2 shared
Ares Management Corporation2 shared
Galvanize Climate Solutions1 shared
NGP Capital1 shared
Schooner Capital1 shared
XTX Markets1 shared
Point72 Private Investments1 shared
BDC Capital1 shared
Atreides Management1 shared
Amazon.com Inc.1 shared
Thistledown Capital1 shared
Hatch1 shared
Gaingels1 shared
Presight Capital1 shared
Chrysalix Venture Capital1 shared
JIMCO1 shared
8VC1 shared
Alumni Ventures1 shared
Playground Global1 shared
Last updated: 19 September 2026