Company: AGIO
Filing Date: 2025-04-25
Form Type: DEFA14A
Source: 0001193125-25-096729
Chunk: 0

Company: AGIOS PHARMACEUTICALS, INC.
Filing Date: 2025-04-25
Form: DEFA14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 
 14a-6(e)(2))                                                       |

| ☐ | Definitive Proxy Statement |

| ☒ | Definitive Additional Materials |

| ☐ | Soliciting Material Pursuant to §240.14a-12 |

Agios Pharmaceuticals, Inc. (Name of Registrant as Specified in its Charter) Not applicable. (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check all boxes that apply):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 
 14a-6(i)(1) and 0-11.                                                          |

| P.O. BOX 8016, CARY, NC 27512-9903 |

| Agios Pharmaceuticals, Inc.                                                                                                                                                                                                                              
 Annual Meeting of Stockholders                                                                                                                                                                                                                           
 Wednesday, June 18, 2025 9:00 AM, Eastern Time                                                                                                                                                                                                           
 Annual Meeting to be held live via the Internet - please visit www.proxydocs.com/AGIO for more details.                                                                                                                                                  
 You must register prior to the deadline of June 16, 2025 at 5 p.m. ET, to attend                                                                                                                                                                         
 the meeting online and/or participate at www.proxydocs.com/AGIO.                                                                                                                                                                                         
 For a convenient way to view proxy materials, VOTE, and register to attend the meeting go to www.proxydocs.com/AGIO.                                                                                                                                     
 To vote your proxy while visiting this site, you will need the 12 digit control number                                                                                                                                                                   
 in the box below.   This communication presents only an overview of the more                                                                                                                                                                             
 complete proxy materials that are available to you on the Internet. This is not a ballot. You cannot use this notice to vote your shares. We encourage you to access and review all of the important information