Vivian Riefberg

Director/Board Member at WAYSTAR HOLDING CORP.

Net worth: 460 558 $ as of 2026-05-30

66 year

79 connections

Commercial Services

Consumer Services

Health Services

Profile

Vivian E.
Riefberg is Director at Johns Hopkins Medicine, Inc. since 2020, Director at Public Broadcasting Service since 2018, Director at K Health, Inc. since 2021, Independent Director at Waystar Holding Corp.
since 2023, Director at Lightrock LLP since 2022, Independent Non-Executive Director at ONWARD Medical NV since 2022, Director at National Education Equity Lab, Director at Dr. Lorna Breen Heroes’ Foundation, Director at Lightrock Holding AG, Director at Accompany Health, Inc. since 2023, Professor at Jefferson Scholars Foundation since 2020, and Professor at the University of Virginia Darden School of Business.
Former roles include Director at Partnership for a Healthier America, Independent Director at Signify Health, Inc. from 2020 to 2023, Director at Mentors, Inc., and Senior Partner at McKinsey & Co., Inc. from 1990 to 2020.
Education includes undergraduate studies at Radcliffe College and an MBA from Harvard Business School.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
WAYSTAR HOLDING CORP. 0.01%	2026-06-02	23,132 ( 0.01% )	460 558 $	2026-05-30

Vivian Riefberg active positions

Companies	Position	Start
ONWARD MEDICAL N.V.	Director/Board Member	2022-09-25
WAYSTAR HOLDING CORP.	Director/Board Member	2023-09-30
K Health, Inc. K Health, Inc. Packaged SoftwareTechnology Services Provides clinical AI services	Director/Board Member	2021-05-18
LGT Impact Ventures (UK) LGT Impact Ventures (UK) Investment ManagersFinance Lightrock invests in companies located in Europe, India, Latin America and Africa. The firm targets companies operating in the fields of technology sectors. It provides financing for growth stage capital requirements.	Director/Board Member	2022-02-28
Lightrock Holding AG	Director/Board Member	-
Dr. Lorna Breen Heroes’ Foundation	Director/Board Member	-
National Education Equity Lab National Education Equity Lab Miscellaneous Commercial ServicesCommercial Services Operates as a nonprofit organization that provides college credit-bearing course services	Director/Board Member	-
Jefferson Scholars Foundation	Corporate Officer/Principal	2020-07-31
Johns Hopkins Medicine, Inc. Johns Hopkins Medicine, Inc. Hospital/Nursing ManagementHealth Services Operates a hostpital	Director/Board Member	2020-06-30
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All active positions of Vivian Riefberg

Former positions of Vivian Riefberg

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See the detail of Vivian Riefberg's experience

Training of Vivian Riefberg

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

See the detail of Vivian Riefberg's experience

Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

See the personal network

Linked companies

Private companies	18
McKinsey & Co., Inc. McKinsey & Co., Inc. Miscellaneous Commercial ServicesCommercial Services Operates as a management consulting firm	Commercial Services
Johns Hopkins Medicine, Inc. Johns Hopkins Medicine, Inc. Hospital/Nursing ManagementHealth Services Operates a hostpital	Health Services
Public Broadcasting Service Public Broadcasting Service BroadcastingConsumer Services Provides public broadcasting television services	Consumer Services
Jefferson Scholars Foundation
Radcliffe College Radcliffe College Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Partnership for a Healthier America Partnership for a Healthier America Miscellaneous Commercial ServicesCommercial Services Engages in transforming the food landscape for health equity	Commercial Services
Harvard Business School Harvard Business School Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
University of Virginia Darden School of Business University of Virginia Darden School of Business Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
GTX medical BV GTX medical BV Medical SpecialtiesHealth Technology Develops novel therapies for improved rehabilitation of patients suffering from spinal-cord injuries	Health Technology
K Health, Inc. K Health, Inc. Packaged SoftwareTechnology Services Provides clinical AI services	Technology Services
Waystar Holding Corp. Waystar Holding Corp. Packaged SoftwareTechnology Services Develops cloud based healthcare payments software	Technology Services
LGT Impact Ventures (UK) LGT Impact Ventures (UK) Investment ManagersFinance Lightrock invests in companies located in Europe, India, Latin America and Africa. The firm targets companies operating in the fields of technology sectors. It provides financing for growth stage capital requirements.	Finance
Signify Health, Inc. Signify Health, Inc. Medical/Nursing ServicesHealth Services Operates as a healthcare platform	Health Services
Mentors, Inc. Mentors, Inc. Miscellaneous Commercial ServicesCommercial Services Operates as a nonprofit organization that provides reentry, housing and family services	Commercial Services
National Education Equity Lab National Education Equity Lab Miscellaneous Commercial ServicesCommercial Services Operates as a nonprofit organization that provides college credit-bearing course services	Commercial Services
Dr. Lorna Breen Heroes’ Foundation
Lightrock Holding AG
Accompany Health, Inc. Accompany Health, Inc. Medical/Nursing ServicesHealth Services Provides in-home care services	Health Services