![Sean Hennessy](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>)
Sean Hennessy
Director/Board Member at
TRANSDIGM GROUP INC.
Net worth: 46 M $ as of 2026-05-30
Profile
Mr. Sean P.
Hennessy, CPA, is an Independent Director at Perimeter Solutions, Inc. and an Independent Director at TransDigm Group, Inc. He is on the Board of Directors at Perimeter Solutions, Inc., TransDigm Group, Inc., Sisters of Charity Foundation of Cleveland, Sisters of Charity of St. Augustine Health Systems and St. Edward High School.
Mr. Hennessy was previously employed as a Senior VP-Planning, Development & Administration by The Sherwin-Williams Co. He also served on the board at Pison Stream Solutions, Inc. and Sherwin-Williams Protective & Marine Coatings.
He received his undergraduate degree from the University of Akron.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-03-19 | 33,790 ( 0.06% ) | 43 M $ | 2026-05-30 | |
| 2026-02-25 | 100,000 ( 0.06% ) | 3 M $ | 2026-05-30 |
Sean Hennessy active positions
| Companies | Position | Start |
|---|---|---|
| TRANSDIGM GROUP INC. | Director/Board Member | 2006-03-31 |
| PERIMETER SOLUTIONS, INC. | Director/Board Member | 2021-11-08 |
Sisters of Charity Foundation of Cleveland
 Sisters of Charity Foundation of Cleveland Miscellaneous Commercial ServicesCommercial Services Engages in charity related activities for homeless peoples | Director/Board Member | - |
St. Edward High School
 St. Edward High School Other Consumer ServicesConsumer Services Operates as a high school | Director/Board Member | - |
Sisters of Charity of St. Augustine Health Systems
 Sisters of Charity of St. Augustine Health Systems Hospital/Nursing ManagementHealth Services Owns and operates hospitals | Director/Board Member | - |
Former positions of Sean Hennessy
| Companies | Position | End |
|---|---|---|
| THE SHERWIN-WILLIAMS COMPANY | Director of Finance/CFO | 2016-12-31 |
Sherwin-Williams Protective & Marine Coatings
 Sherwin-Williams Protective & Marine Coatings Industrial SpecialtiesProcess Industries Manufactures industrial paint | Director/Board Member | 2018-01-07 |
Pison Stream Solutions, Inc.
 Pison Stream Solutions, Inc. Miscellaneous Commercial ServicesCommercial Services Engages in research and development of chemical coatings platforms for defense, aerospace, automotive and antimicrobial industries | Director/Board Member | - |
Training of Sean Hennessy
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
60
1st degree connections
9
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 9 |
|---|---|
The Sherwin-Williams Co.
 The Sherwin-Williams Co. Industrial SpecialtiesProcess Industries Develops, manufactures, distributes and sale of paints, coatings and related products | Process Industries |
Sisters of Charity of St. Augustine Health Systems
Sisters of Charity of St. Augustine Health Systems Hospital/Nursing ManagementHealth Services Owns and operates hospitals | Health Services |
University of Akron
 University of Akron Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
TransDigm Group, Inc.
 TransDigm Group, Inc. Aerospace & DefenseElectronic Technology Designs, produces and supplies engineered aircraft component products | Electronic Technology |
Sherwin-Williams Protective & Marine Coatings
Sherwin-Williams Protective & Marine Coatings Industrial SpecialtiesProcess Industries Manufactures industrial paint | Process Industries |
St. Edward High School
St. Edward High School Other Consumer ServicesConsumer Services Operates as a high school | Consumer Services |
Pison Stream Solutions, Inc.
Pison Stream Solutions, Inc. Miscellaneous Commercial ServicesCommercial Services Engages in research and development of chemical coatings platforms for defense, aerospace, automotive and antimicrobial industries | Commercial Services |
Sisters of Charity Foundation of Cleveland
Sisters of Charity Foundation of Cleveland Miscellaneous Commercial ServicesCommercial Services Engages in charity related activities for homeless peoples | Commercial Services |
Perimeter Solutions SA
 Perimeter Solutions SA Chemicals: Major DiversifiedProcess Industries Manufactures fire retardants, safety products and oil additives | Process Industries |
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