5/5DEEP FISSION, INC. (FISN): Non-reliance / restatement

Market data

Price before filing: n/a (n/a close, split/dividend-adjusted)
Market cap at flag: n/a · Latest: $190.1M (2026-10-16)

What happened next

Return from the last close before the filing date to the first close on/after the window end. Pending windows have not fully elapsed. Past performance says nothing certain about the future.

Insider trading around this filing

90 days before the flag: no open-market insider sales or purchases reported.
30 days after: none reported.

Open-market purchases and sales (Form 4 codes P and S) by officers, directors and 10% owners, by transaction date, from 2026-01-09 to 2026-05-09. Excludes option exercises, grants, gifts and tax withholding. Amended filings replace the originals; joint filings count once. Foreign private issuers do not file Form 4. Many insider sales are pre-scheduled (10b5-1 plans) and are not by themselves a sign of wrongdoing.

Verified excerpt

"On April 9, 2026, the Board of Directors (the "Board") of Deep Fission, Inc. (the "Company"), in consultation with management, concluded that the following previously issued consolidated financial statements of the Company for which the Company is required to provide financial statements under Regulation S-X (and any related financial information, including that included in press releases, shareholder..."

Quoted from the filing. Source

What this means

The company says previously issued financial statements (or the auditor's report on them) should no longer be relied upon (8-K Item 4.02). Non-reliance on the financial statements themselves is one of the most serious accounting red flags: past reported numbers were wrong and will be restated.

Scope: previously issued financial statements

Why this score: also within 90 days: Auditor change, Going-concern doubt