Read Simon

Director at Dianthus Therapeutics, Inc. /DE/ · on record since May 22, 2026
Chief Scientific Officer at Ra Pharmaceuticals, Inc. · on record since Oct 25, 2016

Insider trading activity of Read Simon

Transactions on record: 39; since Feb 3, 2017

Open-market buys: 0

Open-market sells: 8; $2.5M

Companies traded: 2; last filing May 22, 2026

Figures computed from official regulatory filings — methodology.

Companies where Read Simon has traded

Dianthus Therapeutics, Inc. /DE/2 tx · May 22, 2026
Ra Pharmaceuticals, Inc.37 tx · $3.4M · Apr 3, 2020

Track record of Read Simon

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

Transaction history of Read Simon

Co-insiders of Read Simon

Albers Jeffrey W.Dianthus Therapeutics, Inc. /DE/
Alphabet Inc.Dianthus Therapeutics, Inc. /DE/
Atlas Venture Associates Opportunity I, LLCDianthus Therapeutics, Inc. /DE/
Atlas Venture Associates Opportunity I, L.P.Dianthus Therapeutics, Inc. /DE/
Atlas Venture Associates X, LLCDianthus Therapeutics, Inc. /DE/
ATLAS VENTURE ASSOCIATES X, L.P.Dianthus Therapeutics, Inc. /DE/
Atlas Venture Fund X, L.P.Dianthus Therapeutics, Inc. /DE/

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

Company	Filed	Type	Qty	Price	Value · USD	Src
Dianthus Therapeutics, Inc. /DE/	May 22, 2026	AwardD	6,090	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	May 22, 2025	AwardD	25,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-9,166	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-107,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-67,500	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-46,434	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-26,422	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-55,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	Other	-12,595	48.00 USD	$604.6K	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-25,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Dec 18, 2019	Sell	-10,000	47.08 USD	$470.8K	SEC
Ra Pharmaceuticals, Inc.	Dec 18, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Dec 18, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Nov 18, 2019	Sell	-10,000	46.68 USD	$466.8K	SEC
Ra Pharmaceuticals, Inc.	Nov 18, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Nov 18, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Oct 17, 2019	Sell	-10,000	46.87 USD	$468.7K	SEC
Ra Pharmaceuticals, Inc.	Oct 17, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Oct 17, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Sep 16, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Sep 16, 2019	Sell	-10,000	25.41 USD	$254.1K	SEC
Ra Pharmaceuticals, Inc.	Sep 16, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Aug 27, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Aug 27, 2019	Sell	-10,000	27.77 USD	$277.7K	SEC
Ra Pharmaceuticals, Inc.	Aug 27, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC

Company	Filed	Type	Qty	Price	Value · USD	Src
Dianthus Therapeutics, Inc. /DE/	May 22, 2026	AwardD	6,090	0.00 USD	$0	SEC
Dianthus Therapeutics, Inc. /DE/	May 22, 2025	AwardD	25,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-9,166	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-107,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-67,500	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-46,434	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-26,422	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-55,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	Other	-12,595	48.00 USD	$604.6K	SEC
Ra Pharmaceuticals, Inc.	Apr 3, 2020	OtherD	-25,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Dec 18, 2019	Sell	-10,000	47.08 USD	$470.8K	SEC
Ra Pharmaceuticals, Inc.	Dec 18, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Dec 18, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Nov 18, 2019	Sell	-10,000	46.68 USD	$466.8K	SEC
Ra Pharmaceuticals, Inc.	Nov 18, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Nov 18, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Oct 17, 2019	Sell	-10,000	46.87 USD	$468.7K	SEC
Ra Pharmaceuticals, Inc.	Oct 17, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Oct 17, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Sep 16, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC
Ra Pharmaceuticals, Inc.	Sep 16, 2019	Sell	-10,000	25.41 USD	$254.1K	SEC
Ra Pharmaceuticals, Inc.	Sep 16, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Aug 27, 2019	Exercise	10,000	2.87 USD	$28.7K	SEC
Ra Pharmaceuticals, Inc.	Aug 27, 2019	Sell	-10,000	27.77 USD	$277.7K	SEC
Ra Pharmaceuticals, Inc.	Aug 27, 2019	ExerciseD	-10,000	0.00 USD	$0	SEC