Elsey R Don

Chief Financial Officer at Emergent BioSolutions Inc. · on record since Mar 11, 2010
Director at REGENERX BIOPHARMACEUTICALS INC · on record since Sep 3, 2010
Sr. VP/Chief Financial Officer at Tobira Therapeutics, Inc. · on record since May 7, 2014
Director at BullFrog AI Holdings, Inc. · on record since Jun 15, 2026
CFO, Secretary and Treasurer at Senseonics Holdings, Inc. · on record since Apr 14, 2016
Director at CapForce Inc. · on record since Feb 25, 2019
CFO, Treasurer & Secretary at Lyra Therapeutics, Inc. · on record since Apr 30, 2020

Insider trading activity of Elsey R Don

Transactions on record: 185; since Nov 21, 2006

Open-market buys: 1; $3.4K

Open-market sells: 97; $2.1M

Companies traded: 7; last filing Jun 15, 2026

Figures computed from official regulatory filings — .

Companies where Elsey R Don has traded

BullFrog AI Holdings, Inc.7 tx · Jun 15, 2026
CapForce Inc.5 tx · Jun 9, 2023
REGENERX BIOPHARMACEUTICALS INC20 tx · $78.2M · May 19, 2022
Lyra Therapeutics, Inc.2 tx · Feb 10, 2021
Senseonics Holdings, Inc.3 tx · Feb 5, 2018
Tobira Therapeutics, Inc.2 tx · Jan 5, 2015
Emergent BioSolutions Inc.146 tx · $3.4M · Mar 16, 2012

Track record of Elsey R Don

Statistical track record

Free account

Open-market buys: 5

Last buy: May 13, 2019

Win rates, median returns and the proven-insider analysis come with a free account.

Transaction history of Elsey R Don

Co-insiders of Elsey R Don

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
BullFrog AI Holdings, Inc.Listing on record	Jun 15, 2026	AwardD (derivative)	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Sep 29, 2025	AwardD (derivative)	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Aug 26, 2025	Award	5,710	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Aug 26, 2025	Award	2,813	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Feb 12, 2025	AwardD (derivative)	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CapForce Inc.Listing unverified	Jun 9, 2023	Award	1,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	May 9, 2023	AwardD (derivative)	40,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Apr 18, 2023	AwardD (derivative)	40,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CapForce Inc.Listing unverified	Jun 10, 2022	Award	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	May 19, 2022	AwardD (derivative)	290,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Aug 4, 2021	AwardD (derivative)	290,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CapForce Inc.Listing unverified	Jun 10, 2021	Award	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Lyra Therapeutics, Inc.Listing on record	Feb 10, 2021	AwardD (derivative)	45,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CapForce Inc.Listing unverified	Oct 2, 2020	AwardD (derivative)	50,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Jun 12, 2020	AwardD (derivative)	250,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Lyra Therapeutics, Inc.Listing on record	May 1, 2020	AwardD (derivative)	20,635	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	May 17, 2019	AwardD (derivative)	250,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	May 15, 2019	BuyD (derivative)	0	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	Cluster	SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	May 15, 2019	BuyD (derivative)	15,625	2,500.00 USD	$39.1M	Cluster	SEC
CapForce Inc.Listing unverified	May 2, 2019	Award	30,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Mar 1, 2019	BuyD (derivative)	15,625	2,500.00 USD	$39.1M	ClusterFirst in 12mo	SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Mar 1, 2019	BuyD (derivative)	0	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	ClusterFirst in 12mo	SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Sep 13, 2018	Other	104,456	0.06 USD	$6.3K		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Sep 13, 2018	OtherD (derivative)	-104,456	—	n/a (No price was disclosed in the filing)		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Jul 19, 2018	AwardD (derivative)	200,000	0.21 USD	$42K		SEC

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
BullFrog AI Holdings, Inc.Listing on record	Jun 15, 2026	AwardD (derivative)	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Sep 29, 2025	AwardD (derivative)	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Aug 26, 2025	Award	5,710	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Aug 26, 2025	Award	2,813	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Feb 12, 2025	AwardD (derivative)	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CapForce Inc.Listing unverified	Jun 9, 2023	Award	1,500	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	May 9, 2023	AwardD (derivative)	40,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
BullFrog AI Holdings, Inc.Listing on record	Apr 18, 2023	AwardD (derivative)	40,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CapForce Inc.Listing unverified	Jun 10, 2022	Award	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	May 19, 2022	AwardD (derivative)	290,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Aug 4, 2021	AwardD (derivative)	290,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CapForce Inc.Listing unverified	Jun 10, 2021	Award	15,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Lyra Therapeutics, Inc.Listing on record	Feb 10, 2021	AwardD (derivative)	45,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
CapForce Inc.Listing unverified	Oct 2, 2020	AwardD (derivative)	50,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Jun 12, 2020	AwardD (derivative)	250,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Lyra Therapeutics, Inc.Listing on record	May 1, 2020	AwardD (derivative)	20,635	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	May 17, 2019	AwardD (derivative)	250,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	May 15, 2019	BuyD (derivative)	0	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	Cluster	SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	May 15, 2019	BuyD (derivative)	15,625	2,500.00 USD	$39.1M	Cluster	SEC
CapForce Inc.Listing unverified	May 2, 2019	Award	30,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Mar 1, 2019	BuyD (derivative)	15,625	2,500.00 USD	$39.1M	ClusterFirst in 12mo	SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Mar 1, 2019	BuyD (derivative)	0	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))	ClusterFirst in 12mo	SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Sep 13, 2018	Other	104,456	0.06 USD	$6.3K		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Sep 13, 2018	OtherD (derivative)	-104,456	—	n/a (No price was disclosed in the filing)		SEC
REGENERX BIOPHARMACEUTICALS INCListing on record	Jul 19, 2018	AwardD (derivative)	200,000	0.21 USD	$42K		SEC