Mark Johnson

Merrill Lynch & Co., Inc. provided wealth management, securities trading and sales, corporate finance and investment banking services. Merrill Lynch was a global trader and underwriter of securities and derivatives across a range of asset classes and serve as a strategic advisor to governments, institutions and individuals worldwide. The company was founded in 1913 and was headquartered in Charlotte, NC.

Syniverse Technologies LLC provides mobile communications services to mobile operators, cable and internet providers and enterprises. It offers connected LTE, intelligent roaming, mobile protection, mobile engagement, mobile reach and revenue management. The company was founded in 1987 and is headquartered in Tampa, FL.

J. H. Whitney & Co. LLC operates as an alternative investment manager. The firm provides private equity capital to small and middle market companies. The company was founded by John Hay Whitney in 1946 and is headquartered in New Canaan, CT.

Blackstone Corporate Private Equity (Blackstone Corporate) is a private equity division of The Blackstone Group Inc founded in 1985 by Stephen Allen Schwarzman. The firm is headquartered in New York.

The Carlyle Group LP (Global Private Equity) is a private equity firm founded in the year 1990 by William E. Conway, Jr. and Daniel A. D'Aniello. The firm is headquartered in Washington DC.

Syniverse Holdings LLC provides transaction processing and intelligence solutions enabling seamless mobile communication for mobile network operators. It offers mobile transaction services, such as clearing, processing, and exchanging end-user billing records between MNOs, processing and settling payments between participants in the mobile ecosystem, activating, authenticating and authorizing end-user mobile activities. The company was founded in 1987 and is headquartered in Tampa, FL.

Astra Capital Management LLC (Astra Capital Management) is a private equity firm founded in 2014 by Kevin Beebe, Todd Crick, Mark Johnson, William Kennard and Matt Murphy. The firm is headquartered in Washington, District of Columbia.

Tetragon Acquisition Corp. I is a blank check company formed for the purpose of entering into a merger, capital stock exchange, asset acquisition, stock purchase, and reorganization or similar business combination with one or more businesses. The company was founded on March 10, 2021 and is headquartered in New York, NY.