Spiros Giannaros

Chief Executive Officer at GRESHAM TECHNOLOGIES

51 year

Finance

Technology Services

Commercial Services

Profile

Spiros Giannaros is currently Chief Executive Officer at Gresham Technologies Ltd. since 2026.
He is also Director at Charles River International Holdings Ltd. since 2020, Director at Hingham Sports Partnership, and Director at School The World.
Formerly, Mr. Giannaros was Chief Executive Officer at Confluence Technologies, Inc., Managing Director-America Region at Charles River Systems, Inc. from 2013 to 2014, Principal at Thomcorp Holdings, Inc., Partner at IHS Markit, EVP & President-Charles River Development at State Street Corp., and President at Charles River Systems, Inc. from 2019 to 2020.
Education includes undergraduate studies at Boston College.

Spiros Giannaros active positions

Companies	Position	Start
GRESHAM TECHNOLOGIES	Chief Executive Officer	02/07/2026
Charles River International Holdings Ltd. Charles River International Holdings Ltd. Financial ConglomeratesFinance Functions as an investment holding company	Director/Board Member	12/03/2020
School The World School The World School The World is a nonprofit organization dedicated to disrupting the cycle of extreme poverty by transforming education in rural and remote communities worldwide, including the Philippines. The private company is based in Boston. Since its founding in 2009, the organization has built schools and playgrounds, trained teachers using methodologies such as Teaching at the Right Level (TaRL), awarded scholarships, and empowered parents as their children’s first educators. Its accelerated learning program has demonstrated improvements in literacy and numeracy, reducing illiteracy rates among children. The organization collaborates with local NGOs, governments, parents, and leaders to create sustainable educational impact and systemic change. School The World also offers student service learning and corporate service trips, engaging high school students and professionals in school construction, cultural exchange, and citizenship development. Additionally, it runs a student-led chapter program to raise awareness and funds for education equity, encouraging youth leadership and teamwork.	Director/Board Member	-

All active positions of Spiros Giannaros

Former positions of Spiros Giannaros

Companies	Position	End
Charles River Systems, Inc. Charles River Systems, Inc. Packaged SoftwareTechnology Services Provides asset and investment management software & technology services	Corporate Officer/Principal	30/04/2014
Confluence Technologies, Inc. Confluence Technologies, Inc. Packaged SoftwareTechnology Services Provides enterprise data and software solutions for regulatory, analytics and investor communications	Chief Executive Officer	-
IHS Markit IHS Markit Investment ManagersFinance Provides financial information, analytics and solutions	Corporate Officer/Principal	-
Charles River Systems, Inc. Charles River Systems, Inc. Packaged SoftwareTechnology Services Provides asset and investment management software & technology services	Chief Executive Officer	-
STATE STREET CORPORATION	Corporate Officer/Principal	-

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Linked companies

Private companies	9
State Street Corp. State Street Corp. Investment Banks/BrokersFinance Operates as bank holding company which provides custody, accounting, fund administration and investment management services	Finance
Gresham Technologies Plc Gresham Technologies Plc Information Technology ServicesTechnology Services Provides data integrity, reconciliation and enterprise data automation solutions for global financial institutions	Technology Services
Thomcorp Holdings, Inc. Thomcorp Holdings, Inc. Miscellaneous Commercial ServicesCommercial Services Provides information, news, and technology solutions to the financial community	Commercial Services
Boston College Boston College Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Charles River Systems, Inc. Charles River Systems, Inc. Packaged SoftwareTechnology Services Provides asset and investment management software & technology services	Technology Services
Confluence Technologies, Inc. Confluence Technologies, Inc. Packaged SoftwareTechnology Services Provides enterprise data and software solutions for regulatory, analytics and investor communications	Technology Services
IHS Markit IHS Markit Investment ManagersFinance Provides financial information, analytics and solutions	Finance
Charles River International Holdings Ltd. Charles River International Holdings Ltd. Financial ConglomeratesFinance Functions as an investment holding company	Finance
School The World School The World School The World is a nonprofit organization dedicated to disrupting the cycle of extreme poverty by transforming education in rural and remote communities worldwide, including the Philippines. The private company is based in Boston. Since its founding in 2009, the organization has built schools and playgrounds, trained teachers using methodologies such as Teaching at the Right Level (TaRL), awarded scholarships, and empowered parents as their children’s first educators. Its accelerated learning program has demonstrated improvements in literacy and numeracy, reducing illiteracy rates among children. The organization collaborates with local NGOs, governments, parents, and leaders to create sustainable educational impact and systemic change. School The World also offers student service learning and corporate service trips, engaging high school students and professionals in school construction, cultural exchange, and citizenship development. Additionally, it runs a student-led chapter program to raise awareness and funds for education equity, encouraging youth leadership and teamwork.