Morgan Stanley Capital Partners (MSCP) completed the sale of Alliance Technical Group, a leading environmental testing and compliance services provider, to private‑equity funds affiliated with Blackstone. The transaction was announced on January 6 2026 and marks the divestiture of a company that had been part of MSCP’s portfolio since 2021.
Alliance, founded in 2000, has grown under MSCP’s stewardship through a combination of organic expansion, strategic acquisitions, and investment in technology and a national operating platform. The sale reflects MSCP’s broader strategy of reallocating capital from mature middle‑market assets to new opportunities that align with its focus on business services, consumer, healthcare, education, and industrials.
Blackstone’s acquisition aligns with its long‑standing private‑equity strategy of investing in high‑growth, operationally focused companies. While the specific Blackstone funds involved were not disclosed, the move signals the firm’s continued interest in the environmental testing and compliance sector, which is experiencing increasing regulatory complexity and demand for advanced monitoring solutions.
The transaction’s financial terms were not made public. However, the deal underscores the value that MSCP has built in Alliance, which now benefits from Blackstone’s global resources and expertise in scaling operational platforms.
For MSCP, the sale provides liquidity that can be redeployed into new middle‑market investments, reinforcing its commitment to driving growth through operational improvements and strategic acquisitions. The divestiture also signals a shift away from the environmental services niche toward broader sectors where MSCP sees higher upside potential.
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