Company: KROS
Filing Date: 2025-11-19
Form Type: SC TO-I/A
Source: 0001104659-25-113880
Chunk: 2

Company: Keros Therapeutics, Inc.
Filing Date: 2025-11-19
Form: SC TO-I/A
Chunk 2
---
5. A copy of the press release is filed as Exhibit (a)(5)(C) hereto and is incorporated
by reference herein.”

ITEM 12. EXHIBITS.

Item 12 of the Schedule TO
is hereby amended and supplemented by adding the following exhibits:

| Exhibit    
 Number     | Description                            |
| (a)(5)(C)* | Press Release dated November 19, 2025. |

* Filed herewith

<div align='center'>2

SIGNATURE</div>

After due inquiry and to
the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

| Dated: November 19, 2025 | KEROS THERAPEUTICS, INC. 
 By:                      | /s/ Jasbir Seehra       |
|:-------------------------|:-------------------------|:------------------------|
|                          |                          | Jasbir Seehra           |
|                          |                          | Chief Executive Officer |