Thompson Street Capital Partners Acquires Vector Laboratories (Maravai Protein Detection Business)

Vector Science & Therapeutics Options Up to 15% of LyoGenesis Plus to Gain Access to MPP’s cGMP Manufacturing Facility

May 13, 2026

Healthcare Services

Vector Science & Therapeutics entered into an option agreement to purchase up to a 15% equity interest in LyoGenesis Plus for cash payments of up to US$1.0 million over three years. Through LyoGenesis Plus’s planned acquisition of MPP Group LLC, Vector would secure long-term access to an FDA-registered, cGMP-compliant contract development and manufacturing organization based in Mequon, Wisconsin.

Vector Laboratories Acquires Click Chemistry Tools and Fluoroprobes

March 6, 2023

Biotechnology

Vector Laboratories, a portfolio company of Thompson Street Capital Partners, has acquired Click Chemistry Tools (Scottsdale, AZ) and Fluoroprobes to expand its manufacturing, bioconjugation and labeling capabilities. The add-on acquisitions, with terms undisclosed, are intended to accelerate commercialization of protein detection technologies and increase security of supply for biopharma, diagnostics and life-science customers.

Thompson Street Capital Partners Makes Growth Investment in Sabai Global

February 6, 2023

Healthcare Services

Thompson Street Capital Partners (TSCP) completed a growth investment in Sabai Global, a Chesterfield, Missouri-based provider of biosafety consulting, regulatory review, and central IRB services for clinical research. The investment will support Sabai’s continued expansion of services—particularly in cell and gene therapy—across pharmaceutical sponsors, CROs, academic health systems, and clinical research site networks.

Arlington Capital Partners Acquires Charles River's Avian Vaccine Services to Form AVS Bio

January 5, 2023

Biotechnology

Arlington Capital Partners has acquired Charles River Laboratories' Avian Vaccine Services business to form a standalone company, AVS Bio, serving the biologic manufacturing and bioprocessing markets. AVS Bio, headquartered in Norwich, Connecticut, supplies SPF eggs, antigens, cell products and diagnostic/manufacturing support services and has ~250 employees across 20+ facilities; Fairmount Partners advised Charles River on the sale.

Maravai LifeSciences Acquires MyChem

January 28, 2022

Biotechnology

Maravai LifeSciences (NASDAQ: MRVI) acquired MyChem, LLC, a San Diego-based provider of ultra-pure nucleotides, for $240 million in cash plus potential contingent consideration. The acquisition integrates MyChem into Maravai's TriLink nucleic acid production business to expand capabilities for mRNA synthesis, accelerate R&D and support GMP manufacturing for vaccine, therapeutic and diagnostic customers.

Thompson Street Capital Partners Acquires LifeSpan Biosciences (LSBio)

September 17, 2018

Biotechnology

Thompson Street Capital Partners (TSCP), a St. Louis-based private equity firm, has partnered with management to acquire Seattle-based LifeSpan Biosciences, Inc. (LSBio), a developer and e‑commerce distributor of antibodies, kits, proteins and related reagents for academic and pharmaceutical research. TSCP said it will support LSBio's strategy to expand its catalog and capabilities organically and via targeted acquisitions; terms were not disclosed.