![Nikos Theodosopoulos](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Nikos Theodosopoulos
Director/Board Member at
HERCULES CAPITAL, INC.
Net worth: 2 M $ as of 30/05/2026
Profile
Nikos Theodosopoulos is the founder of NT Advisors LLC, founded in 2012, serving as Independent Director since its founding.
Current jobs include Independent Director at Hercules Capital, Inc. since 2023 and Independent Director at ADTRAN Holdings, Inc. since 2022.
Former jobs include Chairman-Supervisory Board at Adtran Networks SE from 2014 to 2022; Independent Director at Harmonic, Inc. from 2015 to 2022; Managing Director at UBS Securities LLC from 1995 to 2012; Director at Gadget Software, Inc. from 2015 to 2017; Managing Director & Head-US Equity Research at UBS Group AG; Independent Director at Arista Networks, Inc. from 2014 to 2023; Director at ADVA Optical Networking, Inc. from 2014 to 2022; Director at Driving Management Systems, Inc. from 2018 to 2022; Principal at AT&T Corp.; Analyst at Bear, Stearns & Co., Inc. from 1994 to 2003; Principal at Bell Laboratories, Inc. Education includes an undergraduate degree from The Trustees of Columbia University in The City of New York in 1984, a graduate degree from Stanford University in 1985, and an MBA from New York University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 15/03/2026 | 65,963 ( 0.08% ) | 1 M $ | 30/05/2026 | |
| 08/04/2026 | 29,362 ( 0.02% ) | 453 643 $ | 30/05/2026 |
Nikos Theodosopoulos active positions
| Companies | Position | Start |
|---|---|---|
| ADTRAN HOLDINGS, INC. | Director/Board Member | 14/07/2022 |
| HERCULES CAPITAL, INC. | Director/Board Member | 25/09/2023 |
NT Advisors LLC | Founder | 31/07/2012 |
Former positions of Nikos Theodosopoulos
| Companies | Position | End |
|---|---|---|
| ARISTA NETWORKS, INC. | Director/Board Member | 31/05/2023 |
| HARMONIC INC. | Director/Board Member | 11/08/2022 |
| ADTRAN NETWORKS SE | Chairman | 03/08/2022 |
Driving Management Systems, Inc.
 Driving Management Systems, Inc. Miscellaneous Commercial ServicesCommercial Services Provides transportation consulting services | Director/Board Member | 31/12/2021 |
ADVA Optical Networking, Inc.
 ADVA Optical Networking, Inc. Specialty TelecommunicationsCommunications Designs, develops and manufactures broadband networking solutions | Director/Board Member | 31/12/2021 |
Training of Nikos Theodosopoulos
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
98
1st degree connections
17
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 17 |
|---|---|
AT&T Corp. /Old/
 AT&T Corp. /Old/ Major TelecommunicationsCommunications Provides regional, domestic, international, voice, data and video telecommunication services | Communications |
Bear, Stearns & Co., Inc.
 Bear, Stearns & Co., Inc. Investment Banks/BrokersFinance Provides investment banking, securities trading and brokerage Services | Finance |
Harmonic, Inc.
 Harmonic, Inc. Telecommunications EquipmentElectronic Technology Designs, manufactures, and sells versatile video solutions | Electronic Technology |
UBS Securities LLC
 UBS Securities LLC Investment Banks/BrokersFinance Provides brokerage services | Finance |
UBS Group AG
 UBS Group AG Investment ManagersFinance Provides private wealth management, advisory, investment and corporate banking & asset management services | Finance |
The Trustees of Columbia University in The City of New York
 The Trustees of Columbia University in The City of New York Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Stanford University
 Stanford University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Adtran Networks SE
 Adtran Networks SE Telecommunications EquipmentElectronic Technology Manufactures and sells optical and ethernet-based networking products to telecommunications carriers & enterprises | Electronic Technology |
New York University
 New York University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Hercules Capital, Inc.
 Hercules Capital, Inc. Finance/Rental/LeasingFinance Provides financing solutions to high-growth and innovative venture capital-backed and institutional-backed companies | Finance |
Bell Laboratories, Inc.
 Bell Laboratories, Inc. Chemicals: AgriculturalProcess Industries Manufactures rodent control products | Process Industries |
ADVA Optical Networking, Inc.
ADVA Optical Networking, Inc. Specialty TelecommunicationsCommunications Designs, develops and manufactures broadband networking solutions | Communications |
Arista Networks, Inc.
 Arista Networks, Inc. Computer PeripheralsElectronic Technology Manufactures and sells cloud networking products | Electronic Technology |
NT Advisors LLC | |
Gadget Software, Inc.
 Gadget Software, Inc. Packaged SoftwareTechnology Services Builds and develops mobile publishing platform | Technology Services |
Driving Management Systems, Inc.
Driving Management Systems, Inc. Miscellaneous Commercial ServicesCommercial Services Provides transportation consulting services | Commercial Services |
ADTRAN Holdings, Inc.
 ADTRAN Holdings, Inc. Computer PeripheralsElectronic Technology Operates as a holding company which through its subsidiaries offers networking and communications equipment | Electronic Technology |
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