Sean P. Hennessy

Sits on 2 boards. Last updated September 28, 2026

Time on boards

5 years of board service in total across 2 boards, counting each seat separately. Longest: Transdigm Group Incorporated, 2 years.

Transdigm Group Incorporated Director

2 years · Since 2023

Perimeter Solutions SA Director

1 year · Since 2025

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Date	Company	Transaction	Shares	Price	Value
Mar 20, 2026	Transdigm Group Incorporated	Grant or award	+41	$1,214.66	$49,801
Sep 19, 2025	Transdigm Group Incorporated	Grant or award	+36	$1,288.13	$46,373
May 20, 2025	Transdigm Group Incorporated	Option exercise	+4,700	$156.47	$735,409
May 20, 2025	Transdigm Group Incorporated	Open-market sale	−3,000	$1,435.77	$4,307,310
May 20, 2025	Transdigm Group Incorporated	Open-market sale	−664	$1,437.07	$954,214
May 20, 2025	Transdigm Group Incorporated	Open-market sale	−636	$1,437.85	$914,473
May 20, 2025	Transdigm Group Incorporated	Open-market sale	−300	$1,438.89	$431,667
May 20, 2025	Transdigm Group Incorporated	Open-market sale	−100	$1,439.92	$143,992
Mar 26, 2025	Transdigm Group Incorporated	Grant or award	+35	$1,346.50	$47,128
Sep 25, 2024	Transdigm Group Incorporated	Grant or award	+34	$1,367.76	$46,504
Mar 22, 2024	Transdigm Group Incorporated	Grant or award	+31	$1,172.20	$36,338
Jan 22, 2024	Transdigm Group Incorporated	Open-market purchase	+0	$1,065.40	$511
Dec 22, 2023	Transdigm Group Incorporated	Small acquisition	+0	$1,001.05	$200
Dec 22, 2023	Transdigm Group Incorporated	Small acquisition	+0	$1,003.40	$100
Dec 21, 2023	Transdigm Group Incorporated	Small acquisition	+4	$988.81	$4,015

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