Mark Sullivan

DFTX

Mark Sullivan serves as Chief Legal Officer at Definium Therapeutics, Inc. (DFTX). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

7 trades

$569.9K

Net Position

Net Seller

$569.9K

Companies Traded

DFTX

Active Period

Jun 2024 – Dec 2025

7 total trades

Most Recent

Sell DFTX

Dec 26, 2025 · $148.2K

Mark Sullivan's Insider Trading at Definium Therapeutics, Inc. (DFTX)

Buys

0 · $0.00

Sells

7 · $569.9K

Total Shares Bought

Total Shares Sold

67,424

DFTX Price Chart

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Date	Type	Shares	Avg Price	Value
Dec 26, 2025	Sell	11,276	$13.15	$148.2K
Sep 25, 2025	Sell	11,278	$9.77	$110.2K
Jun 25, 2025	Sell	11,491	$6.80	$78.1K
Mar 25, 2025	Sell	6,576	$6.74	$44.3K
Dec 26, 2024	Sell	4,519	$7.43	$33.6K
Sep 25, 2024	Sell	4,430	$5.98	$26.5K
Jun 25, 2024	Sell	17,854	$7.22	$128.9K

Related Insiders

Robert Barrow

Chief Executive Officer

DFTXSell · Dec 26, 2025

Daniel Karlin

Chief Medical Officer

DFTXSell · Dec 26, 2025

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