About This Deal

CHARLES RIVER LABORATORIES INTERNATIONAL, INC. acquired Vigene Biosciences, Inc. for $323.9 million, net of $2.7 million cash (includes $34.5 million contingent consideration), a transaction completed in June 2021, structured as all cash.

Vigene Biosciences, Inc. operates in Manufacturing Support — gene therapy CDMO, is based in United States (Rockville, Maryland). Vigene Biosciences was a gene therapy contract development and manufacturing organization (CDMO) providing viral vector-based gene delivery solutions.

The acquisition enables clients to seamlessly conduct analytical testing, process development, and manufacturing for advanced modalities with the same scientific partner. The preliminary purchase price of Vigene was $323.9 million, net of $2.7 million in cash.

Manufacturing Support segment, Biologics / CDMO

Deal Terms

Acquirer
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Target
Vigene Biosciences, Inc.
Value
$323.9 million, net of $2.7 million cash (includes $34.5 million contingent consideration)
Date
June 2021
Type
Full acquisition
Status
Ready

Transaction Details

Target HQ
United States (Rockville, Maryland)
Segment
Manufacturing Support — gene therapy CDMO
Structure
All cash
Announced
June 28, 2021
Closed
June 28, 2021

In Their Words

The acquisition enables clients to seamlessly conduct analytical testing, process development, and manufacturing for advanced modalities with the same scientific partner. The preliminary purchase price of Vigene was $323.9 million, net of $2.7 million in cash, and includes $34.5 million of contingent consideration.Charles River FY2021 10-K, Business Acquisitions note

Advisors

Advisory firms were not disclosed for this transaction.

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Sources: Press release ↗ · Last updated July 8, 2026

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