Brennan David R

Director at INSMED Inc · on record since May 15, 2026
Director at ALEXION PHARMACEUTICALS, INC. · on record since Jul 24, 2014
Director at Innocoll Holdings plc · on record since Jan 3, 2017

Insider trading activity of Brennan David R

Transactions on record: 43; since Jun 2, 2014

Open-market buys: 2; $395K

Open-market sells: 1; $3.1M

Companies traded: 3; last filing Sep 11, 2026

Figures computed from official regulatory filings — .

Companies where Brennan David R has traded

INSMED Inc20 tx · $3.4M · Sep 11, 2026
ALEXION PHARMACEUTICALS, INC.19 tx · $2.4M · Jul 23, 2021
Innocoll Holdings plc4 tx · Jul 26, 2017

Track record of Brennan David R

Insufficient history for a statistical track record (fewer than 5 open-market buys).

Transaction history of Brennan David R

Co-insiders of Brennan David R

667, L.P.ALEXION PHARMACEUTICALS, INC.
ACM Capital Partners, LLCINSMED Inc
Adsett RogerINSMED Inc
ALLAN GEOFFREYINSMED Inc
ALTOMARI ALFREDINSMED Inc
ANDERSON DAVID JALEXION PHARMACEUTICALS, INC.
ANDERSON ELIZABETH MINSMED Inc
Ayer Capital Management, LPINSMED Inc
Ayer Capital Partners, LLCINSMED Inc
Baker Bros. Advisors (GP) LLCALEXION PHARMACEUTICALS, INC.
BAKER BROS. ADVISORS LPALEXION PHARMACEUTICALS, INC.
Baker Brothers Life Sciences LPALEXION PHARMACEUTICALS, INC.
BAKER FELIXALEXION PHARMACEUTICALS, INC.
BAKER JULIANALEXION PHARMACEUTICALS, INC.
Banerji ShumeetInnocoll Holdings plc
Bazarko DanielALEXION PHARMACEUTICALS, INC.
BELL LEONARDALEXION PHARMACEUTICALS, INC.
Berry PeggyINSMED Inc

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
INSMED IncListing on record	Sep 11, 2026	Sell	-25,000	124.00 USD	$3.1M		SEC
INSMED IncListing on record	May 15, 2026	Award	3,305	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	Feb 25, 2026	Gift	-6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	Nov 10, 2025	Gift	-60,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	Nov 10, 2025	Gift	60,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	May 19, 2025	Award	5,058	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	May 15, 2024	Award	13,162	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	May 15, 2023	Award	13,192	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	May 13, 2022	Award	14,645	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	Nov 3, 2021	Buy	10,000	30.15 USD	$301.5K	conv 35First in 12mo	SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	Jul 23, 2021	OtherD (derivative)	-2,706	167.97 USD	$454.5K		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	Jul 23, 2021	OtherD (derivative)	-2,343	155.01 USD	$363.2K		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	Jul 23, 2021	Other	-20,873	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	Jul 23, 2021	OtherD (derivative)	-2,294	138.86 USD	$318.5K		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 24, 2021	Award	1,374	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 24, 2021	Award	1,962	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	May 14, 2021	Award	7,558	—	n/a (No price was disclosed in the filing)		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 18, 2020	Award	2,428	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 18, 2020	Award	3,468	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	May 14, 2020	Award	8,097	—	n/a (No price was disclosed in the filing)		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 17, 2019	Award	1,908	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 17, 2019	Award	2,726	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	May 16, 2019	Award	6,899	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	May 17, 2018	Award	6,066	—	n/a (No price was disclosed in the filing)		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 11, 2018	Award	2,174	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
INSMED IncListing on record	Sep 11, 2026	Sell	-25,000	124.00 USD	$3.1M		SEC
INSMED IncListing on record	May 15, 2026	Award	3,305	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	Feb 25, 2026	Gift	-6,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	Nov 10, 2025	Gift	-60,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	Nov 10, 2025	Gift	60,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	May 19, 2025	Award	5,058	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	May 15, 2024	Award	13,162	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	May 15, 2023	Award	13,192	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	May 13, 2022	Award	14,645	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	Nov 3, 2021	Buy	10,000	30.15 USD	$301.5K	conv 35First in 12mo	SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	Jul 23, 2021	OtherD (derivative)	-2,706	167.97 USD	$454.5K		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	Jul 23, 2021	OtherD (derivative)	-2,343	155.01 USD	$363.2K		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	Jul 23, 2021	Other	-20,873	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	Jul 23, 2021	OtherD (derivative)	-2,294	138.86 USD	$318.5K		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 24, 2021	Award	1,374	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 24, 2021	Award	1,962	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	May 14, 2021	Award	7,558	—	n/a (No price was disclosed in the filing)		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 18, 2020	Award	2,428	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 18, 2020	Award	3,468	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	May 14, 2020	Award	8,097	—	n/a (No price was disclosed in the filing)		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 17, 2019	Award	1,908	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 17, 2019	Award	2,726	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
INSMED IncListing on record	May 16, 2019	Award	6,899	—	n/a (No price was disclosed in the filing)		SEC
INSMED IncListing on record	May 17, 2018	Award	6,066	—	n/a (No price was disclosed in the filing)		SEC
ALEXION PHARMACEUTICALS, INC.Listing unverified	May 11, 2018	Award	2,174	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC