Company: CRL
Filing Date: 2025-09-19
Form Type: 8-K/A
Source: 0000950103-25-011896
Chunk: 0

Company: CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Filing Date: 2025-09-19
Form: 8-K/A
Chunk 0
---
<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K/A

(Amendment No. 1)

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

September 12, 2025

Date of Report (Date of earliest event reported)

CHARLES RIVER LABORATORIES INTERNATIONAL, INC.

(Exact Name of Registrant as Specified in Charter)</div>

| Delaware                       | 001-15943               | 06-1397316         |
| (State or Other                
 Jurisdiction of Incorporation) | -Commission File Number | -IRS Employer      
 Identification No. |

<div align='center'>251 Ballardvale Street

Wilmington, Massachusetts 01887

(Address of Principal Executive Offices) (Zip Code)

781- 222-6000

(Registrant’s Telephone Number, including
Area Code)

Securities registered pursuant to Section 12(b) of the Act:</div>

| Title of each class           | Trading Symbol(s) | Name of each exchange on which registered |
| Common stock, $0.01 par value | CRL               | New York Stock Exchange                   |

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:

| ☐ | 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)) |

Indicate by check mark whether the registrant is an emerging growth
company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934
(17 CFR §240.12b-2).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant
has elected not to