About This Deal

CHARLES RIVER LABORATORIES INTERNATIONAL, INC. acquired KWS BioTest Limited for $20.3 million in cash, a transaction completed in January 2018, structured as all cash.

KWS BioTest Limited operates in Discovery and Safety Assessment (DSA), is based in United Kingdom. KWS BioTest was a CRO specializing in in vitro and in vivo discovery testing services for immuno-oncology, inflammatory and infectious diseases.

The acquisition enhances our discovery expertise, with complementary offerings that provide our customers with additional tools in the active therapeutic research areas of oncology and immunology. The purchase price for KWS BioTest was $20.3 million in cash.

DSA segment, discovery services

Deal Terms

Acquirer
CHARLES RIVER LABORATORIES INTERNATIONAL, INC.
Target
KWS BioTest Limited
Value
$20.3 million in cash
Date
January 2018
Type
Full acquisition
Status
Ready

Transaction Details

Target HQ
United Kingdom
Segment
Discovery and Safety Assessment (DSA)
Structure
all cash
Announced
January 1, 2018
Closed
January 1, 2018

In Their Words

The acquisition enhances our discovery expertise, with complementary offerings that provide our customers with additional tools in the active therapeutic research areas of oncology and immunology. The purchase price for KWS BioTest was $20.3 million in cash.Charles River FY2018 10-K, Business Acquisitions note

Advisors

Advisory firms were not disclosed for this transaction.

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Sources: Press release ↗ · Last updated June 11, 2026

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