![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: 1 M $ as of 2026-07-30
Profile
Mr. Nikos Theodosopoulos is an Independent Director at Hercules Capital, Inc., an Independent Director at ADTRAN Holdings, Inc. and an Independent Director at NT Advisors LLC.
He is on the Board of Directors at Hercules Capital, Inc., ADTRAN Holdings, Inc. and NT Advisors LLC.
Mr. Theodosopoulos was previously employed as an Independent Director by Harmonic, Inc., a Chairman-Supervisory Board by ADVA Optical Networking SE, an Independent Director by Arista Networks, Inc., a Managing Director by UBS Securities LLC, an Analyst by Bear, Stearns & Co., Inc., a Principal by AT&T Corp.
/Old/, a Principal by Bell Laboratories, Inc., and a Managing Director & Head-US Equity Research by UBS Group AG.
He also served on the board at Driving Management Systems, Inc., Gadget Software, Inc. and ADVA Optical Networking, Inc. He received his undergraduate degree from The Trustees of Columbia University in The City of New York, a graduate degree from Stanford University and an MBA from New York University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-03-15 | 65,963 ( 0.08% ) | 561 345 $ | 2026-07-30 | |
| 2026-04-08 | 29,362 ( 0.02% ) | 482 124 $ | 2026-07-30 |
Nikos Theodosopoulos active positions
| Companies | Position | Start |
|---|---|---|
| ADTRAN HOLDINGS, INC. | Director/Board Member | 2022-07-14 |
| HERCULES CAPITAL, INC. | Director/Board Member | 2023-09-25 |
NT Advisors LLC | Founder | 2012-07-31 |
Former positions of Nikos Theodosopoulos
| Companies | Position | End |
|---|---|---|
| ARISTA NETWORKS, INC. | Director/Board Member | 2023-05-31 |
| HARMONIC INC. | Director/Board Member | 2022-08-11 |
| ADTRAN NETWORKS SE | Chairman | 2022-08-03 |
Driving Management Systems, Inc.
 Driving Management Systems, Inc. Miscellaneous Commercial ServicesCommercial Services Provides transportation consulting services | Director/Board Member | 2021-12-31 |
ADVA Optical Networking, Inc.
 ADVA Optical Networking, Inc. Specialty TelecommunicationsCommunications Designs, develops and manufactures broadband networking solutions | Director/Board Member | 2021-12-31 |
Training of Nikos Theodosopoulos
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
95
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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