1. Corporate Officers - K
2. Krieg Arthur M

Insider Trading History of Krieg Arthur M

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of Krieg Arthur M since 2006. This trader's CIK number is 1335659. At the time of last reporting, Krieg Arthur M was the Chief Scientific Officer of Checkmate Pharmaceuticals, Inc.. (stock ticker symbol CMPI). Also see all insider trading activities at Checkmate Pharmaceuticals, Inc..

Note that in the past Krieg Arthur M also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Checkmate Pharmaceuticals, Inc. (CMPI) by Krieg Arthur M

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2021	CMPI	84,744	$806,084	0	$0	0	$0
2020	CMPI	10,393	$151,836	0	$0	0	$0

Yearly summary of insider trading at Coley Pharmaceutical Group, Inc. (COLY) by Krieg Arthur M

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2007	COLY	0	$0	21,070	$39,822	0	$0
2006	COLY	0	$0	31,332	$65,559	21,000	$24,149

Insider trading activities at 2 companies by Krieg Arthur M:

1. Checkmate Pharmaceuticals, Inc. (CMPI)

2. Coley Pharmaceutical Group, Inc. (COLY)

Table 1. Insider trading of Checkmate Pharmaceuticals, Inc. (CMPI) by Krieg Arthur M

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2021-06-18	CMPI	Buy	7,224	6.04	43,632
2021-06-16	CMPI	Buy	3,578	6.18	22,112
2021-05-18	CMPI	Buy	25,001	6.97	174,256
2021-03-29	CMPI	Buy	33,220	11.17	371,067
2021-03-25	CMPI	Buy	10,036	12.35	123,944
2021-03-26	CMPI	Buy	3,484	12.15	42,330
2021-01-27	CMPI	Buy	1,701	13.05	22,198
2021-01-19	CMPI	Buy	500	13.09	6,545
2020-12-29	CMPI	Buy	443	14.16	6,272
2020-12-22	CMPI	Buy	5,103	14.64	74,707
2020-12-15	CMPI	Buy	42	14.49	608
2020-12-16	CMPI	Buy	4,805	14.62	70,249

Table 2. Insider trading of Coley Pharmaceutical Group, Inc. (COLY) by Krieg Arthur M

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2007-08-29	COLY	Sale	21,070	1.89	39,822
2006-12-07	COLY	Sale	18,122	2.24	40,593
2006-10-13	COLY	Sale	13,210	1.89	24,966
2005-11-29	COLY	Option Ex	21,000	1.15	24,149

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 Krieg Arthur M (Chief Scientific Officer of Checkmate Pharmaceuticals, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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