# EDGAR Filing Document

**Accession Number:** 0001597264
**File Stem:** 0001193125-25-160629
**Filing Date:** 2025-7
**Character Count:** 10500
**Document Hash:** bc4352b99dd8017f92936a6c9cd0c06a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-160629.hdr.sgml**: 20250718

**ACCESSION NUMBER**: 0001193125-25-160629

**CONFORMED SUBMISSION TYPE**: SC TO-T/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250718

**DATE AS OF CHANGE**: 20250717

**GROUP MEMBERS**: AVENTIS INC.

**GROUP MEMBERS**: ROTHKO MERGER SUB, INC.

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Blueprint Medicines Corp
- **CENTRAL INDEX KEY:** 0001597264
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC TO-T/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-88827
- **FILM NUMBER:** 251131998

**BUSINESS ADDRESS:**
- **STREET 1:** 45 SIDNEY STREET
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139
- **BUSINESS PHONE:** 617-374-7580

**MAIL ADDRESS:**
- **STREET 1:** 45 SIDNEY STREET
- **CITY:** CAMBRIDGE
- **STATE:** MA
- **ZIP:** 02139
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Sanofi
- **CENTRAL INDEX KEY:** 0001121404
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 133529324
- **STATE OF INCORPORATION:** I0
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC TO-T/A

**BUSINESS ADDRESS:**
- **STREET 1:** 46 AVENUE DE LA GRANDE ARMEE
- **CITY:** PARIS
- **STATE:** I0
- **ZIP:** 75017
- **BUSINESS PHONE:** 33153774400

**MAIL ADDRESS:**
- **STREET 1:** 46 AVENUE DE LA GRANDE ARMEE
- **CITY:** PARIS
- **STATE:** I0
- **ZIP:** 75017

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SANOFI-AVENTIS
- **DATE OF NAME CHANGE:** 20040826

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** SANOFI SYNTHELABO SA
- **DATE OF NAME CHANGE:** 20010104

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**SCHEDULE TO** 

**Tender Offer Statement under Section 14(d)(1) or 13(e)(1)** 

**of the Securities Exchange Act of 1934** 

**(Amendment No. 3)** 

## Blueprint Medicines Corporation
**(Name of Subject Company (Issuer))** 

**ROTHKO MERGER SUB, INC.** 

**AVENTIS INC.** 

**SANOFI** 

**(Names of Filing Persons — Offerors)** 

**Common Stock, Par Value $0.001 Per Share** 

**(Title of Class of Securities)** 

**09627Y109** 

**(Cusip Number of Class of Securities)** 

**Roy Papatheodorou** 

**Executive Vice President, General Counsel, Head of Legal, Ethics & Business Integrity** 

**Sanofi** 

**46, avenue de la Grande Armée, 75017** 

**Paris, France** 

**Telephone: 011 + 33 1 53 77 40 00** 

**(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications on Behalf of Filing Persons)** 

***Copies to:***

**Michael J. Aiello, Esq.** 

**Sachin Kohli, Esq.** 

**Weil, Gotshal & Manges LLP** 

**767 Fifth Avenue** 

**New York, New York 10153** 

**(212) 310-8000** 

☒ Check the box if any part of the fee is offset as provided by Rule 0-11(a)(2) and identify the filing with which the offsetting fee was previously paid. Identify the previous filing by registration statement number, or the form or schedule and the date of its filing.

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| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Amount Previously Paid: 1,465,193.42 | Filing Party: Sanofi, Aventis Inc. and Rothko Merger Sub, Inc. |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Form or Registration No.: Schedule TO-T<br> (File No. 005-88827) | Date Filed: June 17, 2025 |

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☐ Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;☒ Third-party tender offer subject to Rule 14d-1.

☐ Issuer tender offer subject to Rule 13e-4.

☐ Going-private transaction subject to Rule 13e-3.

☐ Amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer: ☒

If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

☐ Rule 13e-4(i) (Cross-Border Issuer Tender Offer)

☐ Rule 14d-1(d) (Cross-Border Third-Party Tender Offer)

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This Amendment No. 3 (this "<u>Amendment</u>") amends and supplements the Tender Offer Statement on Schedule TO filed by (i) Rothko Merger Sub, Inc., a Delaware corporation ("<u>Purchaser</u>") and an indirect wholly owned subsidiary of SANOFI, a French *société anonyme* ("<u>Parent</u>"), (ii) Parent, and (iii) Aventis Inc., a Pennsylvania corporation and wholly owned subsidiary of Parent and direct parent of Purchaser ("<u>Aventis</u>") on June 17, 2025 (together with any amendments or supplements thereto, including this Amendment, the "<u>Schedule TO</u>"), relating to the offer by Purchaser to purchase all of the outstanding shares of common stock, par value, $0.001 per share (each a "<u>Share</u>" and collectively, "<u>Shares</u>"), of Blueprint Medicines Corporation., a Delaware corporation (the "<u>Company</u>"), for $129.00 per Share in cash, without interest (the "<u>Cash Offer Price</u>") and subject to any withholding of taxes required by applicable legal requirements, plus one (1) non-transferable contractual contingent value right (each, a "<u>CVR</u>") per Share, representing the right to receive contingent payments of up to an aggregate amount of $6.00 per Share in cash, without interest, upon the achievement of one or both of the milestones on or prior to the expiration of the applicable milestone period set forth in the CVR Agreement (the CVR, together with the Cash Offer Price, or any other amount paid pursuant to the Offer to the extent permitted under the Merger Agreement, the "<u>Offer Consideration</u>"), on the terms and subject to the conditions set forth in the Offer to Purchase, dated June 17, 2025 (together with any amendments or supplements thereto, the "<u>Offer to Purchase</u>") and in the accompanying Letter of Transmittal, which are annexed to and filed with the Schedule TO as Exhibits (a)(1)(A) and (a)(1)(B), respectively.

All information set forth in the Offer to Purchase, including Schedule I thereto, is incorporated by reference herein in response to Items 1 through 9 and Item 11 of this Schedule TO and is supplemented by the information specifically provided in this Amendment, except as otherwise set forth below. This Amendment should be read together with the Schedule TO. Capitalized terms used and not otherwise defined in this Amendment have the meanings given to such terms in the Offer to Purchase.

***Items 1 through 9 and Item 11.***

The Offer to Purchase and Items 1 through 9 and Item 11 of the Schedule TO, to the extent such Items incorporate by reference the information contained in the Offer to Purchase, are hereby amended and supplemented as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) The Offer and withdrawal rights expired at 5:00 P.M., Eastern Time, on July 17, 2025 (such date and time,
the "Expiration Time"), and the Offer was not extended. Purchaser was advised by the Depositary that, as of the Expiration Time, a total of 45,991,262 Shares had been validly tendered into and not validly withdrawn pursuant to the Offer,
which together with the Shares owned by Parent and its wholly owned subsidiaries (including Purchaser), represent approximately 70.9% of the aggregate number of Shares then outstanding. Accordingly, the number of Shares validly tendered and not
validly withdrawn pursuant to the Offer satisfied the Minimum Tender Condition.

Purchaser has irrevocably accepted for payment, and has stated it will promptly pay for, all Shares validly tendered and not validly withdrawn pursuant to the Offer.

------

As a result of its acceptance of the Shares tendered pursuant to the Offer and in accordance with Section 251(h) of the DGCL, Purchaser owns a number of Shares that, together with the Shares owned by Parent and its wholly owned subsidiaries, is greater than the percentage of Shares that would be required to adopt the Merger Agreement by a vote of the stockholders of the Company. Pursuant to Section 251(h) of the DGCL, subject to the satisfaction of the remaining conditions set forth in the Merger Agreement, Parent, Aventis and Purchaser intend to complete the acquisition of the Company through the Merger, as promptly as practicable and without a meeting of stockholders of the Company. At the Effective Time and as a result of the Merger, each Share issued and outstanding immediately prior to the Effective Time will be converted into the right to receive the Offer Consideration, without interest and subject to any withholding of taxes required by applicable legal requirements, other than Shares (i) held in the treasury of the Company or owned by the Company or any direct or indirect wholly owned subsidiary of the Company, by Parent or any direct or indirect wholly owned subsidiary of Parent (other than Purchaser), or by stockholders of the Company who have properly exercised and perfected their statutory rights of appraisal under Delaware law, or (ii) irrevocably accepted by Purchaser for purchase in the Offer.

Following the Merger, the Shares will no longer be listed on the NASDAQ Global Select Market and will be deregistered under the Exchange Act.

------

**SIGNATURES** 

After due inquiry and to the best knowledge and belief of the undersigned, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Date: July 17, 2025

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| | | |
|:---|:---|:---|
|  | **Rothko Merger Sub, Inc.** | **Rothko Merger Sub, Inc.** |
| By: | /s/ Michael J. Tolpa | /s/ Michael J. Tolpa |
|  | Name: | Michael J. Tolpa |
|  | Title: | President |
|  | **SANOFI** | **SANOFI** |
| By: | /s/ Roy Papatheodorou | /s/ Roy Papatheodorou |
|  | Name: | Roy Papatheodorou |
|  | Title: | Executive Vice President, General Counsel |
|  | **Aventis Inc.** | **Aventis Inc.** |
| By: | /s/ Jamie Haney | /s/ Jamie Haney |
|  | Name: | Jamie Haney |
|  | Title: | Vice President, General Counsel, Secretary |

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