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8-K filings in January 2026, explained

924 material Form 8-K filings that 737 companies we cover made with the SEC in January 2026, each read and summarized by AI: what happened, the key figures, whether it reads positive or negative for shareholders, and how big a deal it is (impact 1-5). All of them were written later, when past filings were added: a selection, not every 8-K of the month (see the note below).

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CEGConstellation Energy Corp Jan 15, 4:04 PM ET

Constellation completes exchange of $2.29 billion of Calpine notes into its own notes

Neutral financing Written later 1.01 2.03

On January 15, 2026, Constellation completed exchange offers for Calpine's senior notes, with $2,289,722,000 in principal tendered and accepted. Calpine's noteholders also approved amendments that remove substantially all restrictive covenants and events of default, other than payment and bankruptcy defaults. The filing comes after Constellation's January 7, 2026 completion of its acquisition of Calpine, and it shows how Calpine's debt is being moved into Constellation's own notes.

$2,289,722,000 in Calpine notes were validly tendered, accepted, retired and canceled; the exchange offers have expired.
New Constellation notes: 4.625% due February 1, 2029; 5.000% due February 1, 2031; 3.750% due March 1, 2031, with the same interest rates and maturities as the Calpine notes they replace.
Consent solicitation amendments eliminate substantially all restrictive covenants and events of default, other than payment-related and bankruptcy-related defaults.
Settlement date was January 15, 2026, with the supplemental indentures signed the same day.

Read the filing on SEC.gov ↗

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.

Briefs marked “Written later” were written in November 2026 for filings that were by then more than three weeks old, so months before mid-October 2026 hold a selection: every material 8-K of the past year for the 100 largest companies we cover and the last 15 important 8-Ks of every other one. Briefs the number check holds back are not shown or counted. Also: the last 45 days, briefs by company, A–Z and the live SEC filings wire.