Michael Doak

Chief Executive Officer at

Griffin Highline Capital LLC

Net worth: 118 M $ as of 2026-07-30

50 year

87 connections

Finance

Consumer Services

Profile

Michael Doak is the founder of Griffin Highline Capital LLC, founded in 2020, where the title held is Co-Chairman & Chief Executive Officer.
Current jobs include Lead Independent Director at TWFG, Inc. since 2023 and Member-Manager Board at Open Road Holdings LLC.
Former jobs include Director at RenaissanceRe Holdings Ltd., DaVinci Reinsurance Ltd., Tower Hill Insurance Group LLC, Falcon Risk Holdings LLC, TWFG Insurance Services, Inc., and Langhorne Holdings LLC; Independent Director at Trupanion, Inc. from 2014 to 2023; and Senior Vice President at RenaissanceRe Ventures Ltd. Education includes an undergraduate degree from the University of Virginia in 1998 and a graduate degree from The University of Pennsylvania Law School in 2003.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
25.01%	2026-03-29	1,820,234 ( 25.01% )	49 M $	2026-07-30
24.71%	2024-07-18	1,820,234 ( 24.71% )	49 M $	2026-07-30
5.97%	2026-06-04	775,704 ( 5.97% )	21 M $	2026-07-30

Michael Doak active positions

Companies	Position	Start
Griffin Highline Capital LLC Griffin Highline Capital LLC Financial ConglomeratesFinance Operates as a holding company that provides investment and management services in insurance operating businesses	Chief Executive Officer	2020-09-30
Open Road Holdings LLC Open Road Holdings LLC Financial ConglomeratesFinance Provides investment services	Corporate Officer/Principal	-

All active positions of Michael Doak

Former positions of Michael Doak

Companies	Position	End
TRUPANION, INC.	Director/Board Member	2023-06-06
TWFG Insurance Services, Inc. TWFG Insurance Services, Inc. Insurance Brokers/ServicesFinance Provides insurance agency services	Director/Board Member	-
Tower Hill Insurance Group LLC Tower Hill Insurance Group LLC Property/Casualty InsuranceFinance Provides residential property insurance services	Director/Board Member	-
Langhorne Holdings LLC Langhorne Holdings LLC Investment ManagersFinance Langhorne Holdings LLC is an active manager.	Director/Board Member	-

See the detail of Michael Doak's experience

Training of Michael Doak

Experiences
Positions held

Active

Inactive

Listed companies

Private companies

See the detail of Michael Doak's experience

Connections

1st degree connections

1st degree companies

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Female

Members of the board

Executives

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Linked companies

Private companies	11
RenaissanceRe Holdings Ltd. RenaissanceRe Holdings Ltd. Property/Casualty InsuranceFinance Provides property catastrophe reinsurance and insurance services	Finance
University of Virginia University of Virginia Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
DaVinci Reinsurance Ltd. DaVinci Reinsurance Ltd. Specialty InsuranceFinance Provides property catastrophe reinsurance services	Finance
Tower Hill Insurance Group LLC Tower Hill Insurance Group LLC Property/Casualty InsuranceFinance Provides residential property insurance services	Finance
Trupanion, Inc. Trupanion, Inc. Multi-Line InsuranceFinance Engages in providing pet health insurance services	Finance
RenaissanceRe Ventures Ltd. RenaissanceRe Ventures Ltd. Multi-Line InsuranceFinance Provides property catastrophe reinsurance and insurance services	Finance
The University of Pennsylvania Law School The University of Pennsylvania Law School Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
TWFG Insurance Services, Inc. TWFG Insurance Services, Inc. Insurance Brokers/ServicesFinance Provides insurance agency services	Finance
Langhorne Holdings LLC Langhorne Holdings LLC Investment ManagersFinance Langhorne Holdings LLC is an active manager.	Finance
Open Road Holdings LLC Open Road Holdings LLC Financial ConglomeratesFinance Provides investment services	Finance
Griffin Highline Capital LLC Griffin Highline Capital LLC Financial ConglomeratesFinance Operates as a holding company that provides investment and management services in insurance operating businesses	Finance