OHALLERAN MICHAEL D

Director at CARDINAL HEALTH INC · on record since Nov 13, 2006
Director at CAREFUSION Corp · on record since Aug 21, 2009
Former Director at CARDINAL HEALTH INC · on record since Sep 2, 2009
Director at NUVASIVE INC · on record since Aug 3, 2016
Director at Aon plc · on record since Jan 6, 2004
Senior Exec VP at Aon plc · on record since Jan 4, 2005
Director at RYAN SPECIALTY HOLDINGS, INC. · on record since Apr 30, 2026

Insider trading activity of OHALLERAN MICHAEL D

Transactions on record: 243; since Nov 6, 2003

Open-market buys: 7; $6.2M

Open-market sells: 16; $10.8M

Companies traded: 5; last filing Apr 30, 2026

Figures computed from official regulatory filings — .

Companies where OHALLERAN MICHAEL D has traded

RYAN SPECIALTY HOLDINGS, INC.13 tx · $7.9M · Apr 30, 2026
NUVASIVE INC15 tx · $494.8K · May 10, 2019
CAREFUSION Corp51 tx · $776K · Mar 19, 2015
CARDINAL HEALTH INC29 tx · $42K · Sep 2, 2009
Aon plc135 tx · $18M · Aug 17, 2007

Track record of OHALLERAN MICHAEL D

Statistical track record

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Open-market buys: 7

Last buy: Nov 17, 2022

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Transaction history of OHALLERAN MICHAEL D

Co-insiders of OHALLERAN MICHAEL D

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Apr 30, 2026	Award	5,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jun 3, 2025	Award	2,323	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	May 2, 2024	Award	2,496	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	May 2, 2023	Award	2,814	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Nov 17, 2022	Buy	7,724	34.62 USD	$267.4K	conv 17	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Nov 17, 2022	Buy	11,750	33.71 USD	$396.1K	conv 30First in 12mo	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Nov 17, 2022	Buy	1,420	34.20 USD	$48.6K	conv 18	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Nov 17, 2022	Buy	8,580	33.59 USD	$288.2K	conv 18	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jun 9, 2022	Award	2,829	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Mar 22, 2022	Award	4,361	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jul 28, 2021	Buy	199,000	23.50 USD	$4.7M	conv 79ClusterFirst in 12mo	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jul 23, 2021	OtherD (derivative)	-97,496	22.33 USD	$2.2M	Unusual size	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jul 23, 2021	OtherD (derivative)	-3,420	22.33 USD	$76.4K		SEC
NUVASIVE INCListing unverified	May 10, 2019	AwardD (derivative)	2,577	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 7, 2019	ExerciseD (derivative)	-3,230	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 7, 2019	Exercise	3,230	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	Aug 3, 2018	Exercise	3,161	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	Aug 3, 2018	ExerciseD (derivative)	-3,161	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2018	Exercise	2,130	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2018	ExerciseD (derivative)	-2,130	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 7, 2018	ExerciseD (derivative)	3,230	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2017	Exercise	1,890	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2017	AwardD (derivative)	2,130	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2017	ExerciseD (derivative)	-1,890	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	Nov 8, 2016	Buy	4,200	58.26 USD	$244.7K	conv 71Cluster	SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Apr 30, 2026	Award	5,757	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jun 3, 2025	Award	2,323	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	May 2, 2024	Award	2,496	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	May 2, 2023	Award	2,814	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Nov 17, 2022	Buy	7,724	34.62 USD	$267.4K	conv 17	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Nov 17, 2022	Buy	11,750	33.71 USD	$396.1K	conv 30First in 12mo	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Nov 17, 2022	Buy	1,420	34.20 USD	$48.6K	conv 18	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Nov 17, 2022	Buy	8,580	33.59 USD	$288.2K	conv 18	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jun 9, 2022	Award	2,829	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Mar 22, 2022	Award	4,361	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jul 28, 2021	Buy	199,000	23.50 USD	$4.7M	conv 79ClusterFirst in 12mo	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jul 23, 2021	OtherD (derivative)	-97,496	22.33 USD	$2.2M	Unusual size	SEC
RYAN SPECIALTY HOLDINGS, INC.Listing on record	Jul 23, 2021	OtherD (derivative)	-3,420	22.33 USD	$76.4K		SEC
NUVASIVE INCListing unverified	May 10, 2019	AwardD (derivative)	2,577	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 7, 2019	ExerciseD (derivative)	-3,230	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 7, 2019	Exercise	3,230	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	Aug 3, 2018	Exercise	3,161	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	Aug 3, 2018	ExerciseD (derivative)	-3,161	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2018	Exercise	2,130	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2018	ExerciseD (derivative)	-2,130	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 7, 2018	ExerciseD (derivative)	3,230	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2017	Exercise	1,890	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2017	AwardD (derivative)	2,130	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	May 22, 2017	ExerciseD (derivative)	-1,890	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
NUVASIVE INCListing unverified	Nov 8, 2016	Buy	4,200	58.26 USD	$244.7K	conv 71Cluster	SEC