About This Deal

DONALDSON Co INC acquired Isolere Bio, Inc. for $62.3 million (net of cash acquired), a transaction completed in February 2023, structured as all cash.

Isolere Bio, Inc. operates in Life Sciences, is based in Headquartered in Durham, North Carolina. Isolere is an early-stage biotechnology company that developed novel, proprietary IsoTag reagents and accompanying filtration processes used for the purification and streamlined manufacturing of biopharmaceuticals. Aimed initially at the purification of viral vectors used for cell and gene therapies, IsoTag reagents are designed to substantially improve product quality and purity with faster timelines compared to competing solutions.

Adds proprietary purification chemistry to Donaldson's bioprocessing platform, complementing its filtration-based separation technologies.

Life Sciences segment

Deal Terms

Acquirer
DONALDSON Co INC
Target
Isolere Bio, Inc.
Value
$62.3 million (net of cash acquired)
Date
February 2023
Type
Full acquisition
Status
Ready

Transaction Details

Target HQ
Headquartered in Durham, North Carolina
Segment
Life Sciences
Structure
All cash
Announced
February 17, 2023
Closed
February 17, 2023

In Their Words

On February 17, 2023, the Company acquired Isolere, headquartered in Durham, North Carolina, for cash consideration of $62.3 million, net of cash acquired. Isolere develops reagents and accompanying filtration processes used for the purification and streamlined manufacturing of biopharmaceuticals.Donaldson FY2023 10-K, Note 2 Acquisitions

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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