Stephen MacMillan
Net worth: 194 M $ as of 2026-02-27
Net worth: 194 M $ as of 2026-02-27
Mr. Stephen P. MacMillan is a Chairman, President & Chief Executive Officer at Hologic, Inc. He is on the Board of Directors at Advanced Medical Technology Association, United Way of The Battle Creek & Kalamazoo Region and Davidson College. Mr. MacMillan was previously employed as an Independent Director by Boston Scientific Corp., an Independent Director by Alere, Inc., a Chief Executive Officer by Sbiomed LLC, an Independent Director by Texas Instruments Incorporated, a Chairman, President & Chief Executive Officer by Stryker Corp., a Sector Vice President-Global Specialty Operations by Pharmacia Corp., and a President by Johnson & Johnson-Merck Consumer Pharmaceuticals Co. He also served on the board at Domain Surgical, Inc. and Southwest Michigan First (Venture Capital). He received his undergraduate degree from Davidson College.
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
HOLOGIC, INC. 1.15% | 2026-01-15 | 2,570,666 ( 1.15% ) | 194 M $ | 2026-02-27 |
| 2025-03-25 | 4,182 ( 0% ) | 562 312 $ | 2026-02-27 |
| Companies | Position | Start |
|---|---|---|
| HOLOGIC, INC. | Chief Executive Officer | 2013-12-06 |
National Academy of Medicine | Corporate Officer/Principal | - |
Advanced Medical Technology Association
Advanced Medical Technology Association Miscellaneous Commercial ServicesCommercial Services Operates as a trade association that offers information on philanthropy, blood products, diagnostics, orthopedics, ophthalmic, wound care and disaster preparedness | Director/Board Member | 2011-07-14 |
| Companies | Position | End |
|---|---|---|
| ILLUMINA, INC. | Chairman | 2025-03-27 |
| BOSTON SCIENTIFIC CORPORATION | Director/Board Member | 2021-05-05 |
The Wall Street Journal CEO Council | Director/Board Member | 2015-12-31 |
United States Manufacturing Co.
United States Manufacturing Co. Medical SpecialtiesHealth Technology Manufactures orthotics, prosthetics and orthopedics products | Director/Board Member | 2014-12-31 |
Domain Surgical, Inc.
Domain Surgical, Inc. Medical SpecialtiesHealth Technology Develops, manufactures and supplies thermal surgical tools | Director/Board Member | 2013-12-31 |
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Members of the board
Executives
| Private companies | 18 |
|---|---|
Hologic, Inc.
Hologic, Inc. Medical SpecialtiesHealth Technology Develops, manufactures and supplies diagnostics products, medical imaging systems & surgical products | Health Technology |
Stryker Corp.
Stryker Corp. Medical SpecialtiesHealth Technology Manufactures and markets reconstructive, medical and surgical, and neurotechnology and spine products | Health Technology |
Texas Instruments Incorporated
Texas Instruments Incorporated SemiconductorsElectronic Technology Manufactures and sells analog semiconductors & embedded processing products | Electronic Technology |
Boston Scientific Corp.
Boston Scientific Corp. Medical SpecialtiesHealth Technology Develops, manufactures and markets cardiology, endoscopy, peripheral intervention, urology & neuromodulation equipment | Health Technology |
Alere, Inc.
Alere, Inc. Medical SpecialtiesHealth Technology Manufactures point-of-care diagnostic tests | Health Technology |
Illumina, Inc.
Illumina, Inc. Medical SpecialtiesHealth Technology Operates as a biotechnology company that develops laboratory instruments | Health Technology |
Domain Surgical, Inc.
Domain Surgical, Inc. Medical SpecialtiesHealth Technology Develops, manufactures and supplies thermal surgical tools | Health Technology |
MDsave, Inc.
MDsave, Inc. Internet Software/ServicesTechnology Services Operates as an online medical service platform | Technology Services |
United States Manufacturing Co.
United States Manufacturing Co. Medical SpecialtiesHealth Technology Manufactures orthotics, prosthetics and orthopedics products | Health Technology |
Pharmacia Corp.
Pharmacia Corp. Pharmaceuticals: MajorHealth Technology Researches, manufactures and sells pharmaceuticals | Health Technology |
Davidson College
Davidson College Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Johnson & Johnson-Merck Consumer Pharmaceuticals Co.
Johnson & Johnson-Merck Consumer Pharmaceuticals Co. Pharmaceuticals: MajorHealth Technology Manufactures over-the-counter prescription drugs | Health Technology |
Advanced Medical Technology Association
Advanced Medical Technology Association Miscellaneous Commercial ServicesCommercial Services Operates as a trade association that offers information on philanthropy, blood products, diagnostics, orthopedics, ophthalmic, wound care and disaster preparedness | Commercial Services |
Southwest Michigan First (Venture Capital)
Southwest Michigan First (Venture Capital) Investment ManagersFinance The Southwest Michigan First Life Science Fund invests exclusively in early-stage life science companies that have a presence in the Kalamazoo, Michigan region or are committed to establishing a presence in the region. The fund provides equity capital, as well as support services in the areas of industry expertise, regulatory strategy, reimbursement planning, exit strategies and early-stage business systems. | Finance |
National Academy of Medicine | |
The Wall Street Journal CEO Council | |
United Way of The Battle Creek & Kalamazoo Region
United Way of The Battle Creek & Kalamazoo Region Miscellaneous Commercial ServicesCommercial Services Operates as a non profit organization | Commercial Services |
Sbiomed LLC
Sbiomed LLC Miscellaneous Commercial ServicesCommercial Services Provides disinfecting and pest control services | Commercial Services |
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