DESOUZA ERROL B

Director at Korsana Biosciences, Inc. · on record since Jun 28, 2021
Director at IDEXX LABORATORIES INC /DE · on record since Feb 16, 2006
Director at GYRE THERAPEUTICS, INC. · on record since Apr 11, 2006
Director at Alector, Inc. · on record since Mar 21, 2024
Director at PALATIN TECHNOLOGIES INC · on record since Jul 5, 2006
Director at ALBIREO PHARMA, INC. · on record since Apr 2, 2010
CEO at ALBIREO PHARMA, INC. · on record since Dec 16, 2010
Director at CRESCENT BIOPHARMA, INC. · on record since Oct 26, 2015
Director at Royalty Pharma plc · on record since Jun 17, 2020

Insider trading activity of DESOUZA ERROL B

Transactions on record: 126; since Oct 2, 2003

Open-market buys: 1; $33.4K

Open-market sells: 0

Companies traded: 8; last filing Jun 17, 2026

Figures computed from official regulatory filings — .

Companies where DESOUZA ERROL B has traded

Alector, Inc.6 tx · Jun 17, 2026
Royalty Pharma plc6 tx · May 14, 2025
Korsana Biosciences, Inc.4 tx · Dec 4, 2023
CRESCENT BIOPHARMA, INC.23 tx · Oct 5, 2021
ALBIREO PHARMA, INC.32 tx · $168.9K · Oct 2, 2015
GYRE THERAPEUTICS, INC.16 tx · $346.6 · Aug 18, 2015
8 tx · Jul 23, 2010
31 tx · $943.1K · May 1, 2009

Track record of DESOUZA ERROL B

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

Transaction history of DESOUZA ERROL B

Co-insiders of DESOUZA ERROL B

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Value · USD	Src
Alector, Inc.Listing on record	Jun 17, 2026	Award	28,700	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Jun 17, 2026	AwardD (derivative)	9,450	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Jun 12, 2025	Award	28,700	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Jun 12, 2025	AwardD (derivative)	9,450	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	May 14, 2025	Award	7,614	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 10, 2024	Award	9,293	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Mar 21, 2024	Award	41,250	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Mar 21, 2024	AwardD (derivative)	19,420	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Korsana Biosciences, Inc.Listing on record	Dec 4, 2023	Award	20,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Korsana Biosciences, Inc.Listing on record	Dec 4, 2023	Award	30,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 26, 2023	Award	7,747	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 24, 2022	Award	6,328	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Korsana Biosciences, Inc.Listing on record	Jun 16, 2022	AwardD (derivative)	20,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Oct 5, 2021	Award	3,588	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jul 2, 2021	AwardD (derivative)	14,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jul 2, 2021	Award	3,406	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 29, 2021	Award	5,726	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Korsana Biosciences, Inc.Listing on record	Jun 28, 2021	AwardD (derivative)	10,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Apr 5, 2021	Award	2,926	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jan 6, 2021	Award	2,129	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Oct 2, 2020	Award	3,125	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jul 2, 2020	Award	2,129	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 17, 2020	Award	35,715	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jun 12, 2020	AwardD (derivative)	5,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Apr 3, 2020	Award	2,860	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC

Company	Filed	Type	Qty	Value · USD	Src
Alector, Inc.Listing on record	Jun 17, 2026	Award	28,700	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Jun 17, 2026	AwardD (derivative)	9,450	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Jun 12, 2025	Award	28,700	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Jun 12, 2025	AwardD (derivative)	9,450	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	May 14, 2025	Award	7,614	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 10, 2024	Award	9,293	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Mar 21, 2024	Award	41,250	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Alector, Inc.Listing on record	Mar 21, 2024	AwardD (derivative)	19,420	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Korsana Biosciences, Inc.Listing on record	Dec 4, 2023	Award	20,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Korsana Biosciences, Inc.Listing on record	Dec 4, 2023	Award	30,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 26, 2023	Award	7,747	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 24, 2022	Award	6,328	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Korsana Biosciences, Inc.Listing on record	Jun 16, 2022	AwardD (derivative)	20,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Oct 5, 2021	Award	3,588	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jul 2, 2021	AwardD (derivative)	14,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jul 2, 2021	Award	3,406	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 29, 2021	Award	5,726	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Korsana Biosciences, Inc.Listing on record	Jun 28, 2021	AwardD (derivative)	10,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Apr 5, 2021	Award	2,926	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jan 6, 2021	Award	2,129	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Oct 2, 2020	Award	3,125	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jul 2, 2020	Award	2,129	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
Royalty Pharma plcListing on record	Jun 17, 2020	Award	35,715	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Jun 12, 2020	AwardD (derivative)	5,000	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC
CRESCENT BIOPHARMA, INC.Listing unverified	Apr 3, 2020	Award	2,860	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	SEC