DOE approves nuclear safety design for Deep Fission's underground reactor

Thu, 06 Aug 2026 07:01:10 -0400

Deep Fission, Inc. (Nasdaq: FISN), a company developing small modular pressurized water reactors installed one mile underground, announced that the U.S. Department of Energy has approved its Nuclear Safety Design Agreement for its Gravity Nuclear Reactor.

The approval establishes the safety framework for the reactor's continued development and confirms the design warrants advancement under the DOE's Reactor Pilot Program. Deep Fission said the company will move to the next phase of the DOE authorization pathway, advancing toward demonstration and eventual deployment.

"This approval is a major step forward for Deep Fission," said Liz Muller, co-founder and CEO. "We believe our mile-deep design

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Thu, 06 Aug 2026 07:00:00 -0400

BERKELEY, Calif.--(BUSINESS WIRE)-- Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors installed one mile underground, today announced that the U.S. Department of Energy (DOE), has approved the company's Nuclear Safety Design Agreement (NSDA) for its Gravity™ Nuclear Reactor. This marks a major regulatory milestone, confirming that Deep Fission's reactor design warrants advancement under the Department of Energy’s Reactor Pilot Program.

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260806973416/en/

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Thu, 06 Aug 2026 07:00:00 -0400

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260806973416/en/

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Thu, 06 Aug 2026 07:00:00 -0400

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260806973416/en/

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Thu, 06 Aug 2026 07:00:00 -0400

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260806973416/en/

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Thu, 06 Aug 2026 07:00:00 -0400

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260806973416/en/

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Thu, 06 Aug 2026 07:00:00 -0400

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260806973416/en/

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Thu, 06 Aug 2026 07:00:00 -0400

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260806973416/en/

Department of Energy Approves Nuclear Safety Design Agreement for Deep Fission's Gravity™ Reactor, Designed to Convert to Commercial Operation

Thu, 06 Aug 2026 07:00:00 -0400

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260806973416/en/

Seaport Global Securities Starts Deep Fission (FISN) at Buy

Tue, 04 Aug 2026 08:03:13 -0400

Seaport Global Securities analyst Jeff Campbell initiates coverage on Deep Fission (NASDAQ: FISN) with a Buy rating.

For an analyst ratings summary and ratings history on Deep Fission click here. For more ratings news on Deep Fission click here.

Shares of Deep Fission closed at $9.92 yesterday.

Form 10-Q DEEP FISSION, INC. For: Jun 30

Mon, 03 Aug 2026 17:25:00 -0400

si-local-file:///var/storage/secattach/20260803/26859453.html

Form 10-Q DEEP FISSION, INC. For: Jun 30

Mon, 03 Aug 2026 17:25:00 -0400

si-local-file:///var/storage/secattach/20260803/26859453.html

Deep Fission CEO Liz Muller to Present at Canaccord Genuity’s 46th Annual Growth Conference

Mon, 03 Aug 2026 08:30:00 -0400

- Webcast of Investor Presentation on August 11, 2026 at 1:30 p.m. ET -

BERKELEY, Calif.--(BUSINESS WIRE)-- Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors deployed one mile underground, today announced that Liz Muller, Co-Founder and CEO of Deep Fission, will present at Canaccord Genuity’s 46th Annual Growth Conference in Boston, MA on Tuesday, August 11, 2026 at 1:30 p.m. ET.

Investors can register for the live webcast of the presentation HERE.

In addition, Liz will also host

Deep Fission CEO Liz Muller to Present at Canaccord Genuity’s 46th Annual Growth Conference

Mon, 03 Aug 2026 08:30:00 -0400

- Webcast of Investor Presentation on August 11, 2026 at 1:30 p.m. ET -

BERKELEY, Calif.--(BUSINESS WIRE)-- Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors deployed one mile underground, today announced that Liz Muller, Co-Founder and CEO of Deep Fission, will present at Canaccord Genuity’s 46th Annual Growth Conference in Boston, MA on Tuesday, August 11, 2026 at 1:30 p.m. ET.

Investors can register for the live webcast of the presentation HERE.

In addition, Liz will also host

Deep Fission CEO Liz Muller to Present at Canaccord Genuity’s 46th Annual Growth Conference

Mon, 03 Aug 2026 08:30:00 -0400

- Webcast of Investor Presentation on August 11, 2026 at 1:30 p.m. ET -

BERKELEY, Calif.--(BUSINESS WIRE)-- Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors deployed one mile underground, today announced that Liz Muller, Co-Founder and CEO of Deep Fission, will present at Canaccord Genuity’s 46th Annual Growth Conference in Boston, MA on Tuesday, August 11, 2026 at 1:30 p.m. ET.

Investors can register for the live webcast of the presentation HERE.

In addition, Liz will also host

Deep Fission CEO Liz Muller to Present at Canaccord Genuity’s 46th Annual Growth Conference

Mon, 03 Aug 2026 08:30:00 -0400

- Webcast of Investor Presentation on August 11, 2026 at 1:30 p.m. ET -

BERKELEY, Calif.--(BUSINESS WIRE)-- Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company developing small modular pressurized water reactors deployed one mile underground, today announced that Liz Muller, Co-Founder and CEO of Deep Fission, will present at Canaccord Genuity’s 46th Annual Growth Conference in Boston, MA on Tuesday, August 11, 2026 at 1:30 p.m. ET.

Investors can register for the live webcast of the presentation HERE.

In addition, Liz will also host

EnerCom Announces SM Energy as a Keynote Speaker at the 31st EnerCom Denver - The Energy Investment Conference, on August 19, 2026, in Denver, Colorado

Fri, 31 Jul 2026 15:30:00 -0400

Investors are encouraged to register for EnerCom Denver – The Energy Investment Conference,
featuring a broad group of public and private energy companies