# EDGAR Filing Document

**Accession Number:** 0000097745
**File Stem:** 0001140361-25-043793
**Filing Date:** 2025-12
**Character Count:** 7639
**Document Hash:** 8cc27971806b8393bbdda0e02aef1153
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-25-043793.hdr.sgml**: 20251201

**ACCESSION NUMBER**: 0001140361-25-043793

**CONFORMED SUBMISSION TYPE**: 8-A12B

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251201

**DATE AS OF CHANGE**: 20251201

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** THERMO FISHER SCIENTIFIC INC.
- **CENTRAL INDEX KEY:** 0000097745
- **STANDARD INDUSTRIAL CLASSIFICATION:** MEASURING & CONTROLLING DEVICES, NEC [3829]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 042209186
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-A12B
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-08002
- **FILM NUMBER:** 251539908

**BUSINESS ADDRESS:**
- **STREET 1:** 168 THIRD AVENUE
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02451
- **BUSINESS PHONE:** 7816221000

**MAIL ADDRESS:**
- **STREET 1:** 168 THIRD AVENUE
- **CITY:** WALTHAM
- **STATE:** MA
- **ZIP:** 02451

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** THERMO ELECTRON CORP
- **DATE OF NAME CHANGE:** 19920703
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Thermo Fisher Scientific (Finance I) B.V.
- **CENTRAL INDEX KEY:** 0001680143
- **STANDARD INDUSTRIAL CLASSIFICATION:** MEASURING & CONTROLLING DEVICES, NEC [3829]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 981315372
- **STATE OF INCORPORATION:** P7
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-A12B
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-38622
- **FILM NUMBER:** 251539909

**BUSINESS ADDRESS:**
- **STREET 1:** TAKKEBIJSTERS 1
- **CITY:** BREDA
- **STATE:** P7
- **ZIP:** 4817 BL
- **BUSINESS PHONE:** 31-76-579-5555

**MAIL ADDRESS:**
- **STREET 1:** TAKKEBIJSTERS 1
- **CITY:** BREDA
- **STATE:** P7
- **ZIP:** 4817 BL

------

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, D.C. 20549

#### <br>

### FORM 8-A

#### <br>

#### FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES

#### PURSUANT TO SECTION 12(b) OR 12(g) OF THE

#### SECURITIES EXCHANGE ACT OF 1934

## Thermo Fisher Scientific Inc.
(Exact name of registrant as specified in its charter)

---

| | |
|:---|:---|
| **Delaware** | **04-2209186** |
| (State or other jurisdiction of incorporation or organization) | &nbsp;&nbsp;&nbsp;&nbsp; (I.R.S. Employer Identification No.) |

---

---

| | |
|:---|:---|
| **168 Third Avenue**<br> **Waltham, Massachusetts** | **02451** |
| (Address of principal executive offices) | (Zip Code) |

---

#### Thermo Fisher Scientific (Finance I) B.V.
(Exact name of registrant as specified in its charter)

---

| | |
|:---|:---|
| **The Netherlands** | **98-1315372** |
| (State or other jurisdiction of incorporation or organization) | (I.R.S. Employer Identification No.) |

---

---

| | |
|:---|:---|
| **De Posthoornstraat 7**<br> **5048 AS Tilburg**<br> **The Netherlands** |  |
| (Address of principal executive offices) | (Zip Code) |

---

#### Securities to be registered pursuant to Section 12(b) of the Act:

#### <br>

---

| | |
|:---|:---|
| **Title of each class**<br> **to be so registered** | **Name of each exchange on which**<br> **each class is to be registered** |
| Floating Rate Senior Notes due 2027 | New York Stock Exchange LLC |
| 3.628% Senior Notes due 2035 | New York Stock Exchange LLC |

---

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c) or (e), check the following box. ☒

If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d) or (e), check the following box. ☐

If this form relates to the registration of a class of securities concurrently with a Regulation A offering, check the following box. ☐

Securities Act registration statement or Regulation A offering statement file number to which this form relates (if applicable): **333-285159**

**** 

<br> Securities to be registered pursuant to Section 12(g) of the Act: None

------

#### INFORMATION REQUIRED IN REGISTRATION STATEMENT

#### <br>
Thermo Fisher Scientific Inc. ("Thermo Fisher") and Thermo Fisher Scientific (Finance I) B.V. ("Thermo Fisher International" and together with Thermo Fisher, the "Registrants") have filed with the Securities and Exchange Commission (the "Commission") pursuant to Rule 424(b) under the Securities Act of 1933, as amended (the "Securities Act"), a prospectus supplement, dated November 24, 2025 (the "Prospectus Supplement"), and the accompanying prospectus, dated February 24, 2025 (the "Base Prospectus"). The Prospectus Supplement relates to the offering of €1,000,000,000 aggregate principal amount of Floating Rate Senior Notes due 2027 and €1,100,000,000 aggregate principal amount of 3.628% Senior Notes due 2035 (collectively, the "Notes") to be issued by Thermo Fisher International. The Notes will be fully and unconditionally guaranteed by Thermo Fisher.

---

| | |
|:---|:---|
| **Item 1.**  | **Description of Registrant's Securities to be Registered.** |

---

The descriptions under the heading "Description of the Notes" in the Prospectus Supplement and "Description of Thermo Fisher International Debt Securities" in the Base Prospectus are incorporated by reference herein. Copies of such descriptions will be filed with The New York Stock Exchange.<br>

---

| | |
|:---|:---|
| **Item 2.** | **Exhibits.** |

---

---

| | |
|:---|:---|
| **<u>Exhibit No.</u>** | **<u>Description</u>** |
| [4.1](https://www.sec.gov/Archives/edgar/data/97745/000119312516675930/d224635dex41.htm) | Indenture, dated as of August 9, 2016, by and among Thermo Fisher International, as issuer, Thermo Fisher, as guarantor, and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.1 of Thermo Fisher's Current Report on Form 8-K filed with the Commission on August 9, 2016). |
| [4.2](https://www.sec.gov/Archives/edgar/data/97745/000114036125043790/ef20060146_ex4-2.htm) | Fifth Supplemental Indenture, dated as of December 1, 2025, among Thermo Fisher International, as issuer, Thermo Fisher, as guarantor, and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.2 of Thermo Fisher's Current Report on Form 8-K filed with the Commission on December 1, 2025). |
| [4.3](https://www.sec.gov/Archives/edgar/data/97745/000114036125043790/ef20060146_ex4-2.htm) | Form of Floating Rate Senior Notes due 2027 (included in Exhibit 4.2). |
| [4.4](https://www.sec.gov/Archives/edgar/data/97745/000114036125043790/ef20060146_ex4-2.htm) | Form of 3.628% Senior Notes due 2035 (included in Exhibit 4.2). |

---

------

#### SIGNATURE

#### <br>
Pursuant to the requirements of Section 12 of the Securities Exchange Act of 1934 the Registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereto duly authorized.

---

| | | |
|:---|:---|:---|
|  | THERMO FISHER SCIENTIFIC INC. | THERMO FISHER SCIENTIFIC INC. |
| Date: December 1, 2025 | By: | /s/ Thomas B. Shropshire |
|  |  | Name: Thomas B. Shropshire |
|  |  | Title: Senior Vice President and General Counsel |

---

---

| | | |
|:---|:---|:---|
|  | THERMO FISHER SCIENTIFIC (FINANCE I) B.V. | THERMO FISHER SCIENTIFIC (FINANCE I) B.V. |
| Date: December 1, 2025 | By: | /s/ Anthony H. Smith |
|  |  | Name: Anthony H. Smith |
|  |  | Title: Managing Director |

---

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