Compare · ETR vs FISN

ETR vs FISN

Side-by-side comparison of Entergy Corporation (ETR) and Deep Fission Inc. (FISN): market cap, price performance, sector, and recent activity on the wire.

Summary

  • Both ETR and FISN operate in Electric Utilities: Central (Utilities), so they compete in similar markets.
  • ETR is the larger of the two at $53.51B, about 438.8x FISN ($121.9M).
  • Over the past year, ETR is up 16.0% and FISN is down 86.3% - ETR leads by 102.2 points.
  • ETR has been more active in the news (5 items in the past 4 weeks vs 2 for FISN).
  • ETR has more recent analyst coverage (25 ratings vs 0 for FISN).
PerformanceETR+0.76%FISN-86.27%
2026-06-18+0.00%2026-11-11
MetricETRFISN
Company
Entergy Corporation
Deep Fission Inc.
Price
-
-
Market cap
$53.51B
$121.9M
1M return
+6.58%
-48.70%
1Y return
+15.96%
-86.27%
Industry
Electric Utilities: Central
Electric Utilities: Central
Exchange
NYSE
NASDAQ
IPO
2026
News (4w)
5
2
Recent ratings
25
0
ETR

Entergy Corporation

Entergy Corporation, together with its subsidiaries, engages in the production and distribution of electricity in the United States. The company generates electricity through gas/oil, nuclear, coal, hydro, and solar power sources. It operates in two segments, Utility and Entergy Wholesale Commodities. The company's Utility segment generates, transmits, distributes, and sells electric power in portions of Arkansas, Mississippi, Texas, and Louisiana, including the City of New Orleans; and distributes natural gas. Its Entergy Wholesale Commodities segment engages in the ownership, operation, and decommissioning of nuclear power plants located in the northern United States; sale of electric power to wholesale customers; provision of services to other nuclear power plant owners; and owning interests in non-nuclear power plants that sell electric power to wholesale customers. It sells energy to retail power providers, utilities, electric power co-operatives, power trading organizations, and other power generation companies. The company's power plants have approximately 30,000 megawatts (MW) of electric generating capacity, which include 8,000 MW of nuclear power. The company delivers electricity to 3.0 million utility customers in Arkansas, Louisiana, Mississippi, and Texas. Entergy Corporation was incorporated in 1949 and is based in New Orleans, Louisiana.

FISN

Deep Fission Inc.

Deep Fission is developing technology that places a small modular pressurized water reactor in a borehole approximately one mile underground. The Company's Gravity Nuclear Reactor approach combines established pressurized water reactor technology with a novel underground deployment model designed to simplify construction, enhance safety, and support scalable commercial deployment. Deep Fission is focused on delivering reliable, low-carbon baseload power to meet growing electricity demand from utilities, industrial customers, and data centers. The Company is currently advancing the development of its first reactor project in Parsons, Kansas, and was selected for the U.S. Department of Energy's Reactor Pilot Program.