Shigeyuki Hamamatsu

Director of Finance/CFO at OOMA, INC.

Net worth: 4 M $ as of 2026-07-30

53 year

98 connections

Health Technology

Electronic Technology

Commercial Services

Profile

Shigeyuki Hamamatsu is currently Director at TomoTherapy, Inc. and Chief Financial Officer, Treasurer & Senior VP at Ooma, Inc. Formerly, Mr. Hamamatsu was Chief Executive Officer at Accuray Europe SAS; Vice President-Finance & Controller at Cypress Semiconductor Corp.
from 2014 to 2015; Vice President & Controller at CEPHEID from 2015 to 2017; Senior Manager-External Reporting at Magma Design Automation LLC in 2004; Auditor at PricewaterhouseCoopers LLP from 1994 to 2004; Corporate Controller at NetLogic Microsystems, Inc. from 2004 to 2008; Chief Financial Officer & Senior Vice President at Accuray, Inc. from 2018 to 2021; and Vice President-Finance at RPX Corp.
from 2012 to 2014.
Education includes undergraduate studies at the University of Washington.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
OOMA INC 0.67%	2026-06-14	184,227 ( 0.67% )	4 M $	2026-07-30

Shigeyuki Hamamatsu active positions

Companies	Position	Start
OOMA, INC.	Director of Finance/CFO	2021-09-06
TomoTherapy, Inc. TomoTherapy, Inc. Medical SpecialtiesHealth Technology Manufactures and provides radiation treatment systems for advanced radiation therapy	Director/Board Member	-

All active positions of Shigeyuki Hamamatsu

Former positions of Shigeyuki Hamamatsu

Companies	Position	End
ACCURAY INCORPORATED	Director of Finance/CFO	2021-06-30
CEPHEID	Comptroller/Controller/Auditor	2017-04-30
CYPRESS SEMICONDUCTOR CORPORATION	Comptroller/Controller/Auditor	2015-10-31
RPX CORP	Corporate Officer/Principal	2014-04-30
NetLogic Microsystems, Inc. NetLogic Microsystems, Inc. SemiconductorsElectronic Technology Manufactures semiconductors	Comptroller/Controller/Auditor	2008-02-13

See the detail of Shigeyuki Hamamatsu's experience

Training of Shigeyuki Hamamatsu

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

See the detail of Shigeyuki Hamamatsu's experience

Connections

1st degree connections

1st degree companies

Male

Female

Members of the board

Executives

See the personal network

Linked companies

Private companies	11
Cypress Semiconductor Corp. Cypress Semiconductor Corp. SemiconductorsElectronic Technology Designs, manufactures and sells embedded system solutions for internet of things, automotive, industrial & consumer applications	Electronic Technology
CEPHEID CEPHEID Medical SpecialtiesHealth Technology Develops, manufactures and markets molecular diagnostic systems	Health Technology
Magma Design Automation LLC Magma Design Automation LLC Information Technology ServicesTechnology Services Develops software for electronic design automation	Technology Services
PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Miscellaneous Commercial ServicesCommercial Services Provides auditing, assurance, consulting and tax & business consulting services	Commercial Services
NetLogic Microsystems, Inc. NetLogic Microsystems, Inc. SemiconductorsElectronic Technology Manufactures semiconductors	Electronic Technology
Ooma, Inc. Ooma, Inc. Major TelecommunicationsCommunications Provides VoIP phone services through cloud-based SaaS platform	Communications
Accuray Europe SAS Accuray Europe SAS Other Consumer ServicesConsumer Services Engages in repair of electrical and optical equipment	Consumer Services
University of Washington University of Washington Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Accuray, Inc. Accuray, Inc. Medical SpecialtiesHealth Technology Manufactures medical equipment	Health Technology
TomoTherapy, Inc. TomoTherapy, Inc. Medical SpecialtiesHealth Technology Manufactures and provides radiation treatment systems for advanced radiation therapy	Health Technology
RPX Corp. RPX Corp. Miscellaneous Commercial ServicesCommercial Services Provides patent risk, defensive buying, acquisition syndication, insurance and advisory services	Commercial Services