John Mark Hemmann

Director/Board Member at GRAND GROUP INVESTMENT PLC

55 year

Consumer Services

Finance

Technology Services

Profile

John Mark Hemmann is the founder of Akkadian Investment Management LLC.
Mr. Hemmann is an Independent Non-Executive Director at Grand Group Investment Plc.
Former jobs include Director-Capital Markets at WestLB AG (London) and Independent Director at ESG, Inc. from 2024 to 2026.
Education includes undergraduate studies at Pomona College and graduate studies including an MBA at George Washington University.

John Mark Hemmann active positions

Companies	Position	Start
GRAND GROUP INVESTMENT PLC	Director/Board Member	-

All active positions of John Mark Hemmann

Former positions of John Mark Hemmann

Companies	Position	End
ESG INC.	Director/Board Member	2026-03-30
Akkadian Investment Management LLC	Founder	-
WestLB AG (London) WestLB AG (London) Investment Banks/BrokersFinance Provides brokerage services	Corporate Officer/Principal	-

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Training of John Mark Hemmann

Experiences
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Linked companies

Private companies	6
Pomona College Pomona College Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
George Washington University George Washington University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
WestLB AG (London) WestLB AG (London) Investment Banks/BrokersFinance Provides brokerage services	Finance
Grand Group Investment Plc Grand Group Investment Plc Investment ManagersFinance Identifies, acquires, and invests in small to medium-sized companies	Finance
Akkadian Investment Management LLC
Plasma Innovative, Inc. Plasma Innovative, Inc. Packaged SoftwareTechnology Services Operates as a cold plasma application company	Technology Services