![Will Brennan](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>)
Will Brennan
Director/Board Member at
BASWARE OYJ
Net worth: 109 M $ as of 2026-05-30
Profile
Mr. William T.
Brennan, CFA MBA, is a Managing Partner & Portfolio Manager at Long Path Partners LP, an Independent Director at Basware Oy and a Managing Director at CAST SA. He is on the Board of Directors at Altus Group Ltd. and Basware Oy.
Prior to establishing Long Path in 2018, Mr. Brennan was previously employed as a Managing Director by Brown Brothers Harriman & Co. (Investment Management), an Associate by Brown Brothers Harriman & Co. (Investment Management), and an Analyst by Rumson Capital LLC.
He received his BA in Political Science and Economics from the University of Notre Dame and his MBA from Harvard Business School.
He is also a CFA Charterholder.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
ALTUS GROUP LIMITED 9.84% | 2026-05-28 | 3,543,070 ( 9.84% ) | 109 M $ | 2026-05-30 |
Will Brennan active positions
| Companies | Position | Start |
|---|---|---|
| BASWARE OYJ | Director/Board Member | - |
| ALTUS GROUP LIMITED | Director/Board Member | 2024-04-30 |
| CAST SA | Corporate Officer/Principal | - |
Long Path Partners LP
 Long Path Partners LP Investment ManagersFinance Long Path seeks to generate attractive absolute returns over full market cycles while minimizing risk. | Chief Executive Officer | 2018-04-03 |
Former positions of Will Brennan
| Companies | Position | End |
|---|---|---|
Brown Brothers Harriman & Co. (Investment Management)
 Brown Brothers Harriman & Co. (Investment Management) Investment ManagersFinance BBH-IM is a long-term manager which aims to preserve and grow their clients’ capital across economic and market cycles. The firm employs a bottom-up, value-based approach to active management. They focus on identifying durable assets, buying them at attractive valuations, and delivering excellent returns without relying on macroeconomic judgements. BBH-IM seeks to invest primarily in cash generative businesses that are major providers of essential products and services. | Corporate Officer/Principal | 2018-02-28 |
Rumson Capital LLC
 Rumson Capital LLC Investment ManagersFinance Rumson manages the Navesink Investment Partners LP and the Navesink Equity Derivative Fund LDC, a global convertible arbitrage fund. Rumson maintains a high turnover rate | Analyst-Equity | 2008-06-29 |
Brown Brothers Harriman & Co. (Investment Management)
Brown Brothers Harriman & Co. (Investment Management) Investment ManagersFinance BBH-IM is a long-term manager which aims to preserve and grow their clients’ capital across economic and market cycles. The firm employs a bottom-up, value-based approach to active management. They focus on identifying durable assets, buying them at attractive valuations, and delivering excellent returns without relying on macroeconomic judgements. BBH-IM seeks to invest primarily in cash generative businesses that are major providers of essential products and services. | Portfolio Manager-Equities | 2007-12-31 |
Training of Will Brennan
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
77
1st degree connections
8
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 8 |
|---|---|
Brown Brothers Harriman & Co. (Investment Management)
Brown Brothers Harriman & Co. (Investment Management) Investment ManagersFinance BBH-IM is a long-term manager which aims to preserve and grow their clients’ capital across economic and market cycles. The firm employs a bottom-up, value-based approach to active management. They focus on identifying durable assets, buying them at attractive valuations, and delivering excellent returns without relying on macroeconomic judgements. BBH-IM seeks to invest primarily in cash generative businesses that are major providers of essential products and services. | Finance |
University of Notre Dame
 University of Notre Dame Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Altus Group Ltd.
 Altus Group Ltd. Finance/Rental/LeasingFinance Provides asset and fund management solutions | Finance |
CAST SA
 CAST SA Packaged SoftwareTechnology Services Develops an AI and software intelligence platforms | Technology Services |
Basware Oy
 Basware Oy Packaged SoftwareTechnology Services Develops AI-based invoice automation platform | Technology Services |
Rumson Capital LLC
Rumson Capital LLC Investment ManagersFinance Rumson manages the Navesink Investment Partners LP and the Navesink Equity Derivative Fund LDC, a global convertible arbitrage fund. Rumson maintains a high turnover rate | Finance |
Harvard Business School
 Harvard Business School Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Long Path Partners LP
Long Path Partners LP Investment ManagersFinance Long Path seeks to generate attractive absolute returns over full market cycles while minimizing risk. | Finance |
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