Riverside Partners has announced it has completed an investment in UnisLink Holdings.

UnisLink, based in Phoenix, Ariz., provides revenue cycle management and population health management services. Founded in 2009, the company serves independent physician groups, accountable care organizations and value-based care groups.

Riverside Partners, based in Boston and founded in 1988, seeks investments in growing middle-market healthcare- and technology-oriented companies. The firm typically invest in companies with revenues between $10 million and $100 million.

Terms of the investments were not disclosed.

Carlyle will acquire NSM Insurance Group from White Mountains Insurance Group, according to a news release.

The transaction values NSM at $1.775 billion.

NSM, based in Conshohocken, Pa., is an independent insurance brokerage that underwrites policies for behavioral healthcare and several other sectors. Founded in 1990, NSM typically manages all aspects of the placement process on behalf of its insurance carrier partners.

Carlyle, with its U.S. headquarters in Washington, D.C., is a global investment firm that deploys private capital across three business segments: global private equity, global credit and investment solutions. Founded in 1987, the firm targets companies in healthcare and many other industries.

White Mountains Insurance Group is a Bermuda-domiciled financial services holding company with multiple locations in New England.

Arsenal Capital Partners has completed a strategic investment in OncoHealth, according to a news release.

OncoHealth, based in Atlanta, is a digital health company that combines data and analytics with oncology experts to provide solutions used by health plans, employers, providers, patients and life sciences researchers to help navigate the physical, mental and financial complexities of cancer.

Arsenal, based in New York, is a private equity firm specializing in investments in middle market healthcare and specialty industrials companies. Founded in 2000, the firm seeks control investments in companies with the capacity to use $50 million to $300 million of equity, including add-on acquisitions.

It was also announced that McKesson Corp. invested in OncoHealth.

Terms of the investments were not disclosed.

RoundTable Healthcare Partners has announced the closing of its sixth private equity fund with $800 million in capital commitments.

The firm closed its previous fund in 2019 with $700 million.

RoundTable, based in Lake Forest, Ill., is an operating-oriented private equity firm focused exclusively on the healthcare industry. Founded in 2001, the firm targets middle market investments in medical devices, medical products and disposables; specialty pharmaceuticals; medication delivery systems; specialty distribution; and complementary outsourced services.

McGuireWoods has long been an avid supporter of the advancement of professional women. As part of our initiative seeking to expand the leadership of women in private equity, we are continuing our series of profiling women leaders in private equity. We are hopeful that this series will serve to inspire other women to pursue their careers in private equity in a way that best challenges and motivates them, which these impressive women have all done. We are pleased to feature Caroline Stevens of MPK Equity Partners. Access her profile.

To recommend a woman for a future interview, email Amber Walsh at awalsh@mcguirewoods.com.

Avista Capital Partners has announced it has closed on the sale of Inform Diagnostics to Fulgent Genetics for approximately $170 million.

Inform Diagnostics, based in Irving, Texas, is an independent pathology laboratory business that has laboratories in Irving, Texas, as well as Boston, New York City and Phoenix.

Fulgent Genetics (NASDAQ: FLGT), based in Temple City, Calif., is a technology-based genetic testing company. Fulgent performs full-gene sequencing with deletion/duplication analysis in an array of panels.

Avista, based in New York, makes control buyout investments in middle market healthcare companies. Founded in 2005, the firm focuses on the following healthcare subsectors: pharmaceuticals, medical devices, outsourced pharmaceutical services, distribution and consumer-driven healthcare.

KKR has announced it has closed its newest fund, KKR North America Fund XIII, with $19 billion.

The fund, which will focus on pursuing private equity investments in North America, was oversubscribed.

The private equity platform of Kohlberg Kravis Roberts (KKR) & Co., which is based in New York, considers investments in all industries, including healthcare. Founded in 1976, the firm prefers to invest in a range of debt and public equity investing and may co-invest, seeking a controlling ownership of a company or a strategic minority position.

TPG Capital has agreed to acquire ClaimsXten, Change Healthcare’s claims editing business, from UnitedHealth for $2.2 billion, according to news reports.

The sale of ClaimsXten will only proceed if UnitedHealth’s acquisition of Change Healthcare is completed. The acquisition is currently on hold after the U.S. Department of Justice sued to stop the deal.

Previous reports indicated that UnitedHealth was hoping the sale of ClaimsXten would help secure federal approval for its $8 billion acquisition of Change Healthcare.

TPG Capital, headquartered in Fort Worth, Texas and San Francisco, targets investments in middle-market companies in healthcare and a number of other industries.