Core Scientific

2 serious warning signs in Core Scientific’s filings.

We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.

We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 2 Mar 2026, plus the 10-Q filed 28 Jul 2026 and 16 later 8-Ks.

• Weak checks on its own accounts

  Serious

  The company said its checks on its own accounts did not work at the end of its latest quarter. Mistakes could slip into the numbers.

  “Based on that evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that, as of June 30, 2026, our disclosure controls and procedures were not effective due to the material weakness in internal control over financial reporting described below.”

  From the 10-Q filed 28 July 2026, Part I, Item 4. Controls and Procedures. Read it in the filing

• Its past accounts can't be relied on

  Serious

  It told the SEC its earlier accounts should no longer be relied on, usually because they contained errors.

  8-K Item 4.02 filed 2 Mar 2026: the company said its earlier financial statements should no longer be relied on.

  From an 8-K filed 2 March 2026: Previously issued accounts should no longer be relied on. Open the filing

• Changed auditor

  Worth knowing

  The company changed its auditor (the firm that checks its books) in the last two years.

  “Accordingly, Marcum LLP (“Marcum”), the Company’s prior independent registered public accounting firm, was informed on March 12, 2025 that it was dismissed as the Company’s independent registered public accounting firm.”

  From an 8-K filed 13 March 2025: Change of auditor. Read it in the filing

• One big customer

  Worth knowing

  One customer brings in a big share of sales: 72% last year. Losing that customer would hurt.

  “For the years ended December 31, 2025, 2024 and 2023, 72 %, 80 %, and 78 %, respectively, of the Company’s total revenue was generated from digital asset mining of bitcoin from one customer.”

  From the 10-K filed 2 March 2026, Item 8. Financial Statements and Notes. Read it in the filing

• Sales have shrunk: 12.5% a year.
• It owes more than it owns on paper (negative equity). Often that's from borrowing to buy back shares.

Whether the price already reflects the risks is what the deep dive is for.