![Jeffrey Dayno](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>)
Jeffrey Dayno
Chief Executive Officer at
HARMONY BIOSCIENCES HOLDINGS, INC.
Net worth: 412 597 $ as of 2026-05-30
Profile
Jeffrey M.
Dayno is the founder of Delaware Valley Stroke Council.
Dr. Dayno is President, Chief Executive Officer & Director at Harmony Biosciences Holdings, Inc. since 2023.
Dr. Dayno is Director at Atrin Pharmaceuticals LLC since 2016.
Dr. Dayno is Director at Emalex Biosciences, Inc. Dr. Dayno was Senior Director-Medical Services at Merck & Co., Inc. Dr. Dayno was Medical Director at Jefferson Health Systems Stroke Center Network.
Dr. Dayno was Vice President-Medical Services at Cephalon LLC.
Dr. Dayno was Vice President-Global Medical Affairs at Shire ViroPharma, Inc. from 2011 to 2014.
Dr. Dayno was Chief Medical Officer at Labopharm, Inc. from 2010 to 2011.
Dr. Dayno was Chief Medical Officer at Zyla Life Sciences LLC from 2014 to 2017.
Dr. Dayno was President at Labopharm USA, Inc. Dr. Dayno was Vice President-Global Medical Affairs at Viropharma, Inc. from 2011 to 2014.
Dr. Dayno completed undergraduate studies at Trinity College (Connecticut).
Dr. Dayno earned a doctorate from Temple University School of Medicine.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-03-16 | 13,061 ( 0.02% ) | 412 597 $ | 2026-05-30 |
Jeffrey Dayno active positions
| Companies | Position | Start |
|---|---|---|
| HARMONY BIOSCIENCES HOLDINGS, INC. | Chief Executive Officer | 2023-01-05 |
Atrin Pharmaceuticals LLC
 Atrin Pharmaceuticals LLC BiotechnologyHealth Technology Engages in discovery and development of proprietary medications | Director/Board Member | 2016-11-15 |
Emalex Biosciences, Inc.
 Emalex Biosciences, Inc. Pharmaceuticals: MajorHealth Technology Develops treatments for central nervous system disorders | Director/Board Member | - |
Former positions of Jeffrey Dayno
| Companies | Position | End |
|---|---|---|
| ZYLA LIFE SCIENCES | Chief Tech/Sci/R&D Officer | 2017-09-30 |
Shire ViroPharma, Inc.
 Shire ViroPharma, Inc. Pharmaceuticals: MajorHealth Technology Develops and manufactures drugs | Chief Tech/Sci/R&D Officer | 2014-04-30 |
Viropharma, Inc. | Corporate Officer/Principal | 2013-12-31 |
Labopharm, Inc.
 Labopharm, Inc. BiotechnologyHealth Technology Discovers and develops drugs | Chief Tech/Sci/R&D Officer | 2011-06-30 |
Delaware Valley Stroke Council
 Delaware Valley Stroke Council Medical/Nursing ServicesHealth Services Delaware Valley Stroke Council is an American company. 'The company is based in Philadelphia. The company was founded by Jeffrey M. Dayno. | Founder | - |
Training of Jeffrey Dayno
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
39
1st degree connections
14
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 14 |
|---|---|
Cephalon, Inc.
 Cephalon, Inc. Pharmaceuticals: MajorHealth Technology Manufactures and distributes pharmaceutical products | Health Technology |
Merck & Co., Inc.
 Merck & Co., Inc. Pharmaceuticals: MajorHealth Technology Manufactures human and animal health pharmaceutical products & vaccines | Health Technology |
Shire ViroPharma, Inc.
Shire ViroPharma, Inc. Pharmaceuticals: MajorHealth Technology Develops and manufactures drugs | Health Technology |
Labopharm, Inc.
Labopharm, Inc. BiotechnologyHealth Technology Discovers and develops drugs | Health Technology |
Zyla Life Sciences LLC
 Zyla Life Sciences LLC Pharmaceuticals: MajorHealth Technology Operates as a pharmaceutical company that develops medicines for patients with acute and chronic pain | Health Technology |
Trinity College (Connecticut)
 Trinity College (Connecticut) Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Labopharm USA, Inc. | |
Jefferson Health Systems Stroke Center Network
 Jefferson Health Systems Stroke Center Network Packaged SoftwareTechnology Services Operates as healthcare systems | Technology Services |
Temple University School of Medicine
 Temple University School of Medicine Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Atrin Pharmaceuticals LLC
Atrin Pharmaceuticals LLC BiotechnologyHealth Technology Engages in discovery and development of proprietary medications | Health Technology |
Harmony Biosciences Holdings, Inc.
 Harmony Biosciences Holdings, Inc. Pharmaceuticals: MajorHealth Technology Develops and commercializes therapies for patients living with rare neurological disorders | Health Technology |
Emalex Biosciences, Inc.
Emalex Biosciences, Inc. Pharmaceuticals: MajorHealth Technology Develops treatments for central nervous system disorders | Health Technology |
Delaware Valley Stroke Council
Delaware Valley Stroke Council Medical/Nursing ServicesHealth Services Delaware Valley Stroke Council is an American company. 'The company is based in Philadelphia. The company was founded by Jeffrey M. Dayno. | Health Services |
Viropharma, Inc. |
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