Daniel Thomas O

see remarks at CELGENE CORP /DE/ · on record since Feb 24, 2012
Director at Epizyme, Inc. · on record since May 30, 2013
Director at Gossamer Bio, Inc. · on record since Jun 5, 2026
Director at JUNO LIGHTING INC · on record since Aug 13, 2015
Director at Larimar Therapeutics, Inc. · on record since Mar 10, 2016
Director at Dianthus Therapeutics, Inc. /DE/ · on record since Jun 27, 2018

Insider trading activity of Daniel Thomas O

Transactions on record: 157; since Mar 7, 2012

Open-market buys: 0

Open-market sells: 8; $31.3M

Companies traded: 5; last filing Jun 5, 2026

Figures computed from official regulatory filings — methodology.

Companies where Daniel Thomas O has traded

Gossamer Bio, Inc.10 tx · Jun 5, 2026
Dianthus Therapeutics, Inc. /DE/7 tx · Jun 30, 2022
Larimar Therapeutics, Inc.11 tx · $90K · May 17, 2021
JUNO LIGHTING INC2 tx · $764.5K · Mar 7, 2018
CELGENE CORP /DE/127 tx · $45.8M · Feb 2, 2016

Track record of Daniel Thomas O

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

Transaction history of Daniel Thomas O

Co-insiders of Daniel Thomas O

This page republishes public regulatory disclosures. Concerned by this data? Exercise your right to object →

Company	Filed	Type	Qty	Price	Value · USD	Src
Gossamer Bio, Inc.	Jun 5, 2026	AwardD	115,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 26, 2025	AwardD	115,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 6, 2024	AwardD	115,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 9, 2023	AwardD	35,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jul 15, 2022	AwardD	30,000	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 30, 2022	AwardD	20,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 10, 2021	AwardD	23,500	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 3, 2021	AwardD	18,188	0.00 USD	$0	SEC
Larimar Therapeutics, Inc.	May 17, 2021	AwardD	8,300	0.00 USD	$0	SEC
Larimar Therapeutics, Inc.	Sep 30, 2020	AwardD	16,600	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 18, 2020	AwardD	23,500	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 9, 2020	AwardD	18,188	0.00 USD	$0	SEC
Larimar Therapeutics, Inc.	Jun 27, 2019	AwardD	27,000	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 11, 2019	AwardD	18,188	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 11, 2019	AwardD	23,500	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Feb 12, 2019	Other	38,095	—	—	SEC
Gossamer Bio, Inc.	Feb 12, 2019	OtherD	-171,429	—	—	SEC
Larimar Therapeutics, Inc.	Jan 28, 2019	AwardD	13,280	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 27, 2018	Other	24,527	—	—	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 27, 2018	OtherD	-33,350	—	—	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 27, 2018	OtherD	-30,028	—	—	SEC
Larimar Therapeutics, Inc.	Jun 7, 2018	AwardD	20,000	0.00 USD	$0	SEC
JUNO LIGHTING INC	Mar 7, 2018	OtherD	-12,000	63.71 USD	$764.5K	SEC
Larimar Therapeutics, Inc.	Jan 5, 2018	Award	8,687	5.18 USD	$45K	SEC
Larimar Therapeutics, Inc.	Jun 23, 2017	AwardD	14,500	0.00 USD	$0	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
Gossamer Bio, Inc.	Jun 5, 2026	AwardD	115,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 26, 2025	AwardD	115,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 6, 2024	AwardD	115,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 9, 2023	AwardD	35,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jul 15, 2022	AwardD	30,000	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 30, 2022	AwardD	20,000	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 10, 2021	AwardD	23,500	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 3, 2021	AwardD	18,188	0.00 USD	$0	SEC
Larimar Therapeutics, Inc.	May 17, 2021	AwardD	8,300	0.00 USD	$0	SEC
Larimar Therapeutics, Inc.	Sep 30, 2020	AwardD	16,600	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 18, 2020	AwardD	23,500	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 9, 2020	AwardD	18,188	0.00 USD	$0	SEC
Larimar Therapeutics, Inc.	Jun 27, 2019	AwardD	27,000	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 11, 2019	AwardD	18,188	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Jun 11, 2019	AwardD	23,500	0.00 USD	$0	SEC
Gossamer Bio, Inc.	Feb 12, 2019	Other	38,095	—	—	SEC
Gossamer Bio, Inc.	Feb 12, 2019	OtherD	-171,429	—	—	SEC
Larimar Therapeutics, Inc.	Jan 28, 2019	AwardD	13,280	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 27, 2018	Other	24,527	—	—	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 27, 2018	OtherD	-33,350	—	—	SEC
Dianthus Therapeutics, Inc. /DE/	Jun 27, 2018	OtherD	-30,028	—	—	SEC
Larimar Therapeutics, Inc.	Jun 7, 2018	AwardD	20,000	0.00 USD	$0	SEC
JUNO LIGHTING INC	Mar 7, 2018	OtherD	-12,000	63.71 USD	$764.5K	SEC
Larimar Therapeutics, Inc.	Jan 5, 2018	Award	8,687	5.18 USD	$45K	SEC
Larimar Therapeutics, Inc.	Jun 23, 2017	AwardD	14,500	0.00 USD	$0	SEC