# EDGAR Filing Document

**Accession Number:** 0000078003
**File Stem:** 0000078003-25-000159
**Filing Date:** 2025-11
**Character Count:** 5954
**Document Hash:** 734b9e94cbb8fa9e06ed4848f20500fa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000078003-25-000159.hdr.sgml**: 20251113

**ACCESSION NUMBER**: 0000078003-25-000159

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20251113

**ITEM INFORMATION**: Other Events

**FILED AS OF DATE**: 20251113

**DATE AS OF CHANGE**: 20251113

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PFIZER INC
- **CENTRAL INDEX KEY:** 0000078003
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 135315170
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-03619
- **FILM NUMBER:** 251477904

**BUSINESS ADDRESS:**
- **STREET 1:** 66 HUDSON BOULEVARD EAST
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10001-2192
- **BUSINESS PHONE:** 2127332323

**MAIL ADDRESS:**
- **STREET 1:** 66 HUDSON BOULEVARD EAST
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10001-2192

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PFIZER CHARLES & CO INC
- **DATE OF NAME CHANGE:** 19710908

?xml version='1.0' encoding='ASCII'? pfe-20251113

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K** 

**CURRENT REPORT**

**PURSUANT TO SECTION 13 OR 15(d) OF THE**

**SECURITIES EXCHANGE ACT OF 1934**

**Date of report (Date of earliest event reported): November 13, 2025**

**PFIZER INC.**

**(Exact name of registrant as specified in its charter)**

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| | | |
|:---|:---|:---|
| **Delaware** | **1-3619** | **13-5315170** |
| **(State or other** | **(Commission File** | **(I.R.S. Employer** |
| **jurisdiction of** | **Number)** | **Identification No.)** |
| **incorporation)** | |  |

---

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| | | |
|:---|:---|:---|
| **66 Hudson Boulevard East** | **66 Hudson Boulevard East** | **10001-2192** |
| **New York,** | **New York** | **(Zip Code)** |

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**(Address of principal executive offices)**

**Registrant's telephone number, including area code:**

**(212) 733-2323** 

**(Former name or former address, if changed since last report)**

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2 (b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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| | | |
|:---|:---|:---|
| **<u>Securities registered pursuant to Section 12(b) of the Act:</u>** | **<u>Securities registered pursuant to Section 12(b) of the Act:</u>** | **<u>Securities registered pursuant to Section 12(b) of the Act:</u>** |
| <u>Title of each class</u> | <u>Trading Symbol(s)</u> | <u>Name of each exchange on which registered</u> |
| Common Stock, $0.05 par value | PFE | New York Stock Exchange |
| 1.000% Notes due 2027 | PFE/27 | New York Stock Exchange |
| 2.875% Notes due 2029 | PFE/29 | New York Stock Exchange |
| 3.250% Notes due 2032 | PFE/32 | New York Stock Exchange |
| 3.875% Notes due 2037 | PFE/37A | New York Stock Exchange |
| 4.250% Notes due 2045 | PFE/45 | New York Stock Exchange |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. &nbsp;&nbsp;&nbsp;&nbsp;☐

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**Item 8.01 Results of Other Events**

On November 13, 2025, Pfizer Inc. ("Pfizer" or the "Company") completed the previously announced acquisition of Metsera, Inc., a Delaware corporation ("Metsera"), pursuant to the Agreement and Plan of Merger, dated as of September 21, 2025, as amended by Amendment No. 1 to the Agreement and Plan of Merger, dated as of November 7, 2025, by and among the Company, Metsera and Mayfair Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of the Company (as amended, the "Merger Agreement"). Pursuant to the Merger Agreement, each issued and outstanding share of Metsera common stock (other than certain shares set forth in the Merger Agreement) was converted into the right to receive $65.60 in cash at closing, representing an enterprise value of approximately $7.0 billion, and one non-transferable contingent value right entitling holders to potential additional payments of up to $20.65 per share in cash tied to the achievement of three specific milestones: (i) $4.60 per share payable upon the initiation of the Phase 3 clinical trial start of Metsera's injectable GLP-1 receptor antagonist MET-097i+ amylin analog MET-233i combination; (ii) $6.40 per share payable upon U.S. Food and Drug Administration ("FDA") approval of Metsera's monthly MET-097i monotherapy; and (iii) $9.65 per share payable upon FDA approval of Metsera's monthly MET-097i+MET-233i combination.

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
| | **PFIZER INC.** | **PFIZER INC.** |
| Dated: November 13, 2025 | By: | <u>/s/ Margaret M. Madden</u> |
|  |  | Margaret M. Madden |
|  |  | Senior Vice President and Corporate Secretary |
|  |  | Chief Governance Counsel |

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