Eric Mosbrooker Avidity Biosciences, Inc. (RNA) insider trading activity

Eric Mosbrooker is Chief Commercial Officer of Avidity Biosciences, Inc.. Currently has a direct ownership of 55,000 shares of RNA, which is worth approximately $3.89 Million. The most recent transaction as insider was on Oct 03, 2025, when has been sold 6,562 shares (Common Stock) at a price of $45.38 per share, resulting in proceeds of $297,783. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 55K

0% 3M change

n/a 12M change

Total Value Held $3.89 Million

Eric Mosbrooker Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Oct 03 2025	SELL Open market or private sale	$297,783 $45.38 p/Share	6,562 Reduced 10.66%	55,000 Common Stock
Oct 03 2025	BUY Exercise of conversion of derivative security	$59,386 $9.05 p/Share	6,562 Added 9.63%	61,562 Common Stock
Sep 03 2025	SELL Open market or private sale	$308,920 $47.07 p/Share	6,563 Reduced 10.66%	55,000 Common Stock
Sep 03 2025	BUY Exercise of conversion of derivative security	$59,395 $9.05 p/Share	6,563 Added 9.63%	61,563 Common Stock
Aug 06 2025	SELL Open market or private sale	$5,763,356 $44.06 p/Share	130,807 Reduced 70.4%	55,000 Common Stock
Aug 06 2025	BUY Exercise of conversion of derivative security	$1,128,417 $9.05 p/Share	124,687 Added 40.16%	185,807 Common Stock
Jan 06 2025	BUY Grant, award, or other acquisition	-	25,000 Added 29.03%	61,120 Common Stock

Also insider at

HZNP

Horizon Therapeutics Public Ltd Co Healthcare

SVP, Orphan Business Unit

Eric Mosbrooker

Chief Commercial Officer

Dublin, L2

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