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8-K filings in December 2025, explained

619 material Form 8-K filings that 507 companies we cover made with the SEC in December 2025, 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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PFEPFIZER INC Dec 16, 7:01 AM ET

Pfizer Cuts 2025 Revenue Guidance to About $62.0 Billion, Sets 2026 EPS at $2.80-$3.00

Negative guidance Written later 7.01

Pfizer lowered its full-year 2025 revenue guidance to approximately $62.0 billion from $61.0 to $64.0 billion, while reaffirming its 2025 adjusted diluted EPS guidance of $3.00 to $3.15. The company also issued 2026 guidance calling for revenue of $59.5 to $62.5 billion and adjusted diluted EPS of $2.80 to $3.00, below the 2025 EPS range, citing a higher expected tax rate and about $1.5 billion of revenue loss from loss of exclusivity.

2025 revenue guidance revised to approximately $62.0 billion from $61.0 to $64.0 billion; 2025 adjusted diluted EPS guidance of $3.00 to $3.15 reaffirmed
2026 adjusted diluted EPS guidance of $2.80 to $3.00, with an effective tax rate of approximately 15% versus approximately 11% in 2025
2026 revenue guidance of $59.5 to $62.5 billion includes about $1.5 billion lower COVID-19 product revenue and about $1.5 billion negative impact from loss of exclusivity
2026 adjusted SI&A and R&D expenses combined expected at $23.0 to $25.0 billion; guidance assumes no share repurchases in 2025 or 2026

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.