![William Conkling](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>)
William Conkling
Director/Board Member at
IDT CORPORATION
Net worth: 2 M $ as of 30/06/2026
Profile
William Conkling is currently Director at Day Three Labs, Inc. and Cornerstone Pharmaceuticals, Inc. Mr. Conkling is also Independent Director at IDT Corp.
starting in 2026 and Chief Commercial Officer at Protara Therapeutics, Inc. starting in 2025.
Formerly, Mr. Conkling was President & Chief Executive Officer at Rafael Holdings, Inc. from 2023 to 2025, Independent Director at Cyclo Therapeutics, Inc. from 2023 to 2025, and Vice President-Sales, Marketing & Market Access at Immunomedics, Inc. from 2018 to 2021.
Education includes undergraduate studies at Fordham University and an MBA from The Leonard N Stern School of Business, conferred in 1998.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 18/11/2025 | 490,770 ( 0.96% ) | 2 M $ | 30/06/2026 | |
| 02/06/2026 | 69,992 ( 0.12% ) | 267 369 $ | 30/06/2026 | |
| 09/06/2026 | 673 ( 0% ) | 39 142 $ | 30/06/2026 |
William Conkling active positions
| Companies | Position | Start |
|---|---|---|
| PROTARA THERAPEUTICS, INC. | Corporate Officer/Principal | 02/06/2025 |
| IDT CORPORATION | Director/Board Member | 09/06/2026 |
Day Three Labs, Inc.
 Day Three Labs, Inc. Information Technology ServicesTechnology Services Provides proprietary technology services | Director/Board Member | - |
Cornerstone Pharmaceuticals, Inc.
 Cornerstone Pharmaceuticals, Inc. Miscellaneous Commercial ServicesCommercial Services Develops anti-cancer drug delivery technology | Director/Board Member | - |
Former positions of William Conkling
| Companies | Position | End |
|---|---|---|
| RAFAEL HOLDINGS, INC. | Chief Executive Officer | 31/05/2025 |
| CYCLO THERAPEUTICS, INC. | Director/Board Member | 25/03/2025 |
| IMMUNOMEDICS, INC. | Sales & Marketing | 01/03/2021 |
Training of William Conkling
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
69
1st degree connections
9
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 9 |
|---|---|
Immunomedics, Inc.
 Immunomedics, Inc. BiotechnologyHealth Technology Develops drugs for the treatment of cancer | Health Technology |
Cyclo Therapeutics, Inc.
 Cyclo Therapeutics, Inc. BiotechnologyHealth Technology Manufactures and sells cyclodextrins and related products | Health Technology |
IDT Corp.
 IDT Corp. Major TelecommunicationsCommunications Provides telecommunication and financial technology services | Communications |
Cornerstone Pharmaceuticals, Inc.
Cornerstone Pharmaceuticals, Inc. Miscellaneous Commercial ServicesCommercial Services Develops anti-cancer drug delivery technology | Commercial Services |
Fordham University
 Fordham University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer 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 |
Rafael Holdings, Inc.
 Rafael Holdings, Inc. Real Estate DevelopmentFinance Operates as holding company with interest in real estate and pharmaceutical sector | Finance |
Protara Therapeutics, Inc.
 Protara Therapeutics, Inc. Pharmaceuticals: MajorHealth Technology Develops pharmaceuticals | Health Technology |
Day Three Labs, Inc.
Day Three Labs, Inc. Information Technology ServicesTechnology Services Provides proprietary technology services | Technology Services |
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