Company announcementCompany-reported
What was reported
Fort Myers, Fla. – September 21, 2026 – Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company working to place small modular pressurized water reactors (SMRs) in boreholes approximately one mile underground, today announced a collaboration with Youngquist Brothers, LLC ("Youngquist"), a commercial drilling contractor specializing in large-diameter boreholes, to evaluate and test drilling technologies for Deep Fission's underground reactor deployment model.U.S. Securities and Exchange Commission (EDGAR) · Exhibit 99.1 to 8-K · Sep 21, 2026 · Open the source ↗
What the evidence supports
Deep Fission furnished a press release to the SEC (Form 8-K, Item 7.01) about a company announcement. It shows what the company chose to disclose on that date.
What remains unknown
Claims in the release are the company's own and have not been independently verified. Furnishing a document to the SEC does not mean the SEC reviewed or endorsed it.
Source passages
Exact excerpts from the source, with links. Quotes are checked character for character against our stored copy.
Press release headlineDeep Fission and Youngquist Brothers Announce Collaboration on Deep, Large-Diameter Borehole Drilling for Underground Nuclear Reactor DeploymentU.S. Securities and Exchange Commission (EDGAR) · Exhibit 99.1 to 8-K · Sep 21, 2026 · Open the source ↗
Press release lead paragraphFort Myers, Fla. – September 21, 2026 – Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company working to place small modular pressurized water reactors (SMRs) in boreholes approximately one mile underground, today announced a collaboration with Youngquist Brothers, LLC ("Youngquist"), a commercial drilling contractor specializing in large-diameter boreholes, to evaluate and test drilling technologies for Deep Fission's underground reactor deployment model.U.S. Securities and Exchange Commission (EDGAR) · Exhibit 99.1 to 8-K · Sep 21, 2026 · Open the source ↗
Revision history
- Revision 1 · Nov 11, 2026, 21:10 UTC
Deep Fission and Youngquist Brothers Announce Collaboration on Deep, Large-Diameter Borehole Drilling for Underground Nuclear Reactor Deployment
Spotted an error? Tell us. Corrections are published, never silent: see all corrections.