Quisel John D

Director at Gossamer Bio, Inc. · on record since Jun 5, 2026
EVP, Chief Business Officer at ACCELERON PHARMA INC · on record since Jul 11, 2019
Director at Disc Medicine, Inc. · on record since Jan 3, 2023
Chief Executive Officer at Disc Medicine, Inc. · on record since Jan 3, 2023

Insider trading activity of Quisel John D

Transactions on record: 248; since Dec 9, 2013

Open-market buys: 0

Open-market sells: 90; $25.3M

Companies traded: 3; last filing Sep 25, 2026

Figures computed from official regulatory filings — .

Companies where Quisel John D has traded

Gossamer Bio, Inc.5 tx · Sep 25, 2026
Disc Medicine, Inc.68 tx · $19.6M · Sep 16, 2026
ACCELERON PHARMA INC175 tx · $9M · Jan 3, 2020

Track record of Quisel John D

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

Transaction history of Quisel John D

Co-insiders of Quisel John D

Backstrom Jay T.ACCELERON PHARMA INC +1
George JeanACCELERON PHARMA INC +1
GORDON CARL LACCELERON PHARMA INC +1
ORBIMED ADVISORS LLCACCELERON PHARMA INC +1
Access Industries Holdings LLCDisc Medicine, Inc.
ACCESS INDUSTRIES MANAGEMENT, LLCDisc Medicine, Inc.
Advanced Technology Ventures VII(B), L.P.ACCELERON PHARMA INC
Advanced Technology Ventures VII(C), L.P.ACCELERON PHARMA INC
ADVANCED TECHNOLOGY VENTURES VII LPACCELERON PHARMA INC
Advanced Technology Ventures VI, L.P.ACCELERON PHARMA INC
AFEYAN NOUBARACCELERON PHARMA INC
AGTC ADVISORS FUND LPACCELERON PHARMA INC
AGTC Partners, L.P.ACCELERON PHARMA INC
AHMED NADIMDisc Medicine, Inc.
AI DMI LLCDisc Medicine, Inc.

This page republishes public regulatory disclosures.

Company	Filed	Type	Qty	Price	Value · USD	Signals	Src
Gossamer Bio, Inc.Listing on record	Sep 25, 2026	AwardD (derivative)	10,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Sep 16, 2026	ExerciseD (derivative)	-36,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Sep 16, 2026	Exercise	36,000	1.01 USD	$36.4K		SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	ExerciseD (derivative)	-33,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	Sell	-11,888	79.84 USD	$949.2K		SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	Exercise	33,000	13.50 USD	$445.5K	Unusual size	SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	Sell	-12,712	79.20 USD	$1M		SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	Sell	-8,400	78.11 USD	$656.1K		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Sell	-9,704	74.27 USD	$720.7K		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Exercise	25,584	9.86 USD	$252.3K		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	ExerciseD (derivative)	-25,584	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	ExerciseD (derivative)	-7,416	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Sell	-6,400	76.05 USD	$486.7K		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Sell	-16,896	74.95 USD	$1.3M		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Exercise	7,416	13.50 USD	$100.1K		SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	Sell	-22,927	69.92 USD	$1.6M	Unusual size	SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	Exercise	34,000	9.86 USD	$335.2K	Unusual size	SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	Sell	-1,551	71.61 USD	$111.1K		SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	Sell	-9,522	70.70 USD	$673.2K		SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	ExerciseD (derivative)	-34,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Gossamer Bio, Inc.Listing on record	Jun 5, 2026	AwardD (derivative)	115,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Feb 17, 2026	Sell	-13,264	62.86 USD	$833.8K		SEC
Disc Medicine, Inc.Listing on record	Feb 11, 2026	Award	55,200	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Feb 11, 2026	AwardD (derivative)	82,800	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Dec 19, 2025	ExerciseD (derivative)	-12,300	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
Gossamer Bio, Inc.Listing on record	Sep 25, 2026	AwardD (derivative)	10,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Sep 16, 2026	ExerciseD (derivative)	-36,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Sep 16, 2026	Exercise	36,000	1.01 USD	$36.4K		SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	ExerciseD (derivative)	-33,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	Sell	-11,888	79.84 USD	$949.2K		SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	Exercise	33,000	13.50 USD	$445.5K	Unusual size	SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	Sell	-12,712	79.20 USD	$1M		SEC
Disc Medicine, Inc.Listing on record	Aug 18, 2026	Sell	-8,400	78.11 USD	$656.1K		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Sell	-9,704	74.27 USD	$720.7K		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Exercise	25,584	9.86 USD	$252.3K		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	ExerciseD (derivative)	-25,584	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	ExerciseD (derivative)	-7,416	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Sell	-6,400	76.05 USD	$486.7K		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Sell	-16,896	74.95 USD	$1.3M		SEC
Disc Medicine, Inc.Listing on record	Jul 14, 2026	Exercise	7,416	13.50 USD	$100.1K		SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	Sell	-22,927	69.92 USD	$1.6M	Unusual size	SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	Exercise	34,000	9.86 USD	$335.2K	Unusual size	SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	Sell	-1,551	71.61 USD	$111.1K		SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	Sell	-9,522	70.70 USD	$673.2K		SEC
Disc Medicine, Inc.Listing on record	Jun 23, 2026	ExerciseD (derivative)	-34,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Gossamer Bio, Inc.Listing on record	Jun 5, 2026	AwardD (derivative)	115,000	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Feb 17, 2026	Sell	-13,264	62.86 USD	$833.8K		SEC
Disc Medicine, Inc.Listing on record	Feb 11, 2026	Award	55,200	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Feb 11, 2026	AwardD (derivative)	82,800	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC
Disc Medicine, Inc.Listing on record	Dec 19, 2025	ExerciseD (derivative)	-12,300	0.00 USD	n/a (Non-cash transaction: the filing states a price of zero (award, gift, exercise))		SEC