1. Corporate Officers - R
2. Read Simon

Insider Trading History of Read Simon

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of Read Simon since 2019. This trader's CIK number is 1688199. At the time of last reporting, Read Simon was the Officer of Dianthus Therapeutics, Inc. /de/. (stock ticker symbol DNTH). Also see all insider trading activities at Dianthus Therapeutics, Inc. /de/.

Note that in the past Read Simon also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Ra Pharmaceuticals, Inc. (RARX) by Read Simon

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2019	RARX	0	$0	70,000	$2,494,090	79,167	$200,900

Yearly summary of insider trading at Dianthus Therapeutics, Inc. /de/ (DNTH) by Read Simon

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2026	DNTH	0	$0	2,777	$304,087	2,777	$50,985

Insider trading activities at 2 companies by Read Simon:

1. Ra Pharmaceuticals, Inc. (RARX)

2. Dianthus Therapeutics, Inc. /de/ (DNTH)

Table 1. Insider trading of Ra Pharmaceuticals, Inc. (RARX) by Read Simon

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2019-12-17	RARX	Option Ex	10,000	2.87	28,700
2019-12-17	RARX	Sale	10,000	47.08	470,820
2019-11-14	RARX	Sale	10,000	46.68	466,810
2019-11-14	RARX	Option Ex	10,000	2.87	28,700
2019-10-16	RARX	Sale	10,000	46.87	468,730
2019-10-16	RARX	Option Ex	10,000	2.87	28,700
2019-09-12	RARX	Option Ex	10,000	2.87	28,700
2019-09-12	RARX	Sale	10,000	25.41	254,050
2019-08-23	RARX	Option Ex	10,000	2.87	28,700
2019-08-23	RARX	Sale	10,000	27.77	277,700
2019-07-17	RARX	Option Ex	10,000	2.87	28,700
2019-07-17	RARX	Sale	10,000	32.95	329,480
2019-06-18	RARX	Option Ex	10,000	2.87	28,700
2019-06-18	RARX	Sale	10,000	22.65	226,500
2019-02-01	RARX	Option Ex	9,167	.00	0

Table 2. Insider trading of Dianthus Therapeutics, Inc. /de/ (DNTH) by Read Simon

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2026-08-10	DNTH	Option Ex	2,777	18.36	50,985
2026-08-10	DNTH	Sale	2,777	109.50	304,087

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Read Simon (Officer of Dianthus Therapeutics, Inc. /de/ at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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