Michael Geltzeiler

Director/Board Member at HYPERION DEFI, INC.

Net worth: 461 366 $ as of 2026-06-29

67 year

85 connections

Commercial Services

Technology Services

Consumer Services

Profile

Michael S.
Geltzeiler currently serves as Co-Chairman at Madison Square Boys & Girls Clubs, Treasurer & Director at NYSE Euronext Foundation, Inc. since 2011, Director at Museum of American Finance, Independent Director at Hyperion DeFi, Inc. since 2023, and Trustee at the University of Delaware since 2014.
Former positions include Director at ProQuest Co., Westchester County Association, Inc., The NYSE Foundation, and ADT Holdings, Inc.; Director at Voyager Learning Co. from 2004 to 2007; President-School & Educational Services at Trusted Media Brands, Inc. from 2001 to 2009; Controller & CFO-Marketing Services at ACNielsen Corp.
in 2001; Principal at The Dun & Bradstreet Corp.
from 1980 to 1995; Chief Financial Officer & Senior Vice President at The ADT Security Corp.
from 2014 to 2016; and Chief Financial Officer & Executive Vice President at NYSE Euronext, Inc. from 2008 to 2009.
Education includes an undergraduate degree from the University of Delaware in 1980 and an MBA from The Leonard N Stern School of Business.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
HYPERION DEFI, INC. 2.58%	2026-06-29	146,932 ( 2.58% )	461 366 $	2026-06-29

Michael Geltzeiler active positions

Companies	Position	Start
HYPERION DEFI, INC.	Director/Board Member	2023-11-13
NYSE Euronext Foundation, Inc. NYSE Euronext Foundation, Inc. The company, NYSE Euronext Foundation, Inc., is based in New York, NY.	Director/Board Member	2011-08-07
University of Delaware University of Delaware Other Consumer ServicesConsumer Services Functions as a College/University	Director/Board Member	2011-08-08
Museum of American Finance Museum of American Finance Miscellaneous Commercial ServicesCommercial Services Operates as a non-profit museum and educational organization that dedicated to preserving, exhibiting and teaching about American finance and financial history	Director/Board Member	2011-08-08
Madison Square Boys & Girls Clubs Madison Square Boys & Girls Clubs Services to the Health IndustryHealth Services Operates as a boys and girls club	Chairman	-

All active positions of Michael Geltzeiler

Former positions of Michael Geltzeiler

Companies	Position	End
ADT CORP	Director of Finance/CFO	2016-09-30
NYSE Euronext, Inc. NYSE Euronext, Inc. Investment Banks/BrokersFinance Operates as financial market that provides trading solutions for businesses	Director of Finance/CFO	2013-11-12
Trusted Media Brands, Inc. Trusted Media Brands, Inc. Advertising/Marketing ServicesCommercial Services Operates as a direct marketing company	Corporate Officer/Principal	2009-08-17
ProQuest Co. ProQuest Co. Internet Software/ServicesTechnology Services Publishes information and education products	Director/Board Member	2007-03-19
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See the detail of Michael Geltzeiler's experience

Training of Michael Geltzeiler

Experiences
Positions held

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Inactive

Listed companies

Private companies

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Connections

1st degree connections

1st degree companies

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Female

Members of the board

Executives

See the personal network

Linked companies

Private companies	16
Trusted Media Brands, Inc. Trusted Media Brands, Inc. Advertising/Marketing ServicesCommercial Services Operates as a direct marketing company	Commercial Services
ProQuest Co. ProQuest Co. Internet Software/ServicesTechnology Services Publishes information and education products	Technology Services
ACNielsen Corp. ACNielsen Corp. Miscellaneous Commercial ServicesCommercial Services Provides market research, information and analysis services	Commercial Services
The Dun & Bradstreet Corp. The Dun & Bradstreet Corp. Data Processing ServicesTechnology Services Provides business data and analytics services	Technology Services
The ADT Security Corp. The ADT Security Corp. Miscellaneous Commercial ServicesCommercial Services Provides security systems and protective device services	Commercial Services
University of Delaware University of Delaware Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
NYSE Euronext, Inc. NYSE Euronext, Inc. Investment Banks/BrokersFinance Operates as financial market that provides trading solutions for businesses	Finance
Westchester County Association, Inc. Westchester County Association, Inc. Miscellaneous Commercial ServicesCommercial Services Provides business advocacy and consulting services	Commercial Services
Madison Square Boys & Girls Clubs Madison Square Boys & Girls Clubs Services to the Health IndustryHealth Services Operates as a boys and girls club	Health Services
Voyager Learning Co. Voyager Learning Co. Commercial Printing/FormsCommercial Services Publishes K-12 cirriculum products, reading and math intervention programs, and professional development programs	Commercial Services
The NYSE Foundation
ADT Holdings, Inc. ADT Holdings, Inc. Miscellaneous Commercial ServicesCommercial Services Provides security services	Commercial Services
NYSE Euronext Foundation, Inc. NYSE Euronext Foundation, Inc. The company, NYSE Euronext Foundation, Inc., is based in New York, NY.
Museum of American Finance Museum of American Finance Miscellaneous Commercial ServicesCommercial Services Operates as a non-profit museum and educational organization that dedicated to preserving, exhibiting and teaching about American finance and financial history	Commercial Services
The Leonard N Stern School of Business The Leonard N Stern School of Business Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Eyenovia, Inc. Eyenovia, Inc. Pharmaceuticals: MajorHealth Technology Delivers sight saving therapies	Health Technology