1. Corporate Officers - D
2. Doberstein Stephen K

Insider Trading History of Doberstein Stephen K

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of Doberstein Stephen K since 2016. This trader's CIK number is 1480111. At the time of last reporting, Doberstein Stephen K was the Officer of Dicerna Pharmaceuticals Inc. (stock ticker symbol DRNA). Also see all insider trading activities at Dicerna Pharmaceuticals Inc.

Note that in the past Doberstein Stephen K also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Dicerna Pharmaceuticals Inc (DRNA) by Doberstein Stephen K

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2021	DRNA	0	$0	0	$0	3,333	$0

Yearly summary of insider trading at Nektar Therapeutics (NKTR) by Doberstein Stephen K

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2019	NKTR	15,000	$259,200	10,016	$307,777	0	$0
2018	NKTR	0	$0	170,385	$15,550,879	160,000	$1,281,779
2017	NKTR	0	$0	544,663	$14,836,775	540,000	$5,146,197
2016	NKTR	0	$0	2,735	$42,064	1,750	$0

Insider trading activities at 2 companies by Doberstein Stephen K:

1. Dicerna Pharmaceuticals Inc (DRNA)

2. Nektar Therapeutics (NKTR)

Table 1. Insider trading of Dicerna Pharmaceuticals Inc (DRNA) by Doberstein Stephen K

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2021-06-03	DRNA	Option Ex	3,333	.00	0

Table 2. Insider trading of Nektar Therapeutics (NKTR) by Doberstein Stephen K

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2019-09-05	NKTR	Buy	15,000	17.28	259,200
2019-08-16	NKTR	Sale	3,245	18.15	58,896
2019-05-16	NKTR	Sale	3,461	31.37	108,571
2019-02-19	NKTR	Sale	3,310	42.39	140,310
2018-11-16	NKTR	Sale	4,524	38.25	173,043
2018-05-16	NKTR	Sale	3,435	83.39	286,444
2018-04-06	NKTR	Option Ex	110,500	8.37	924,884
2018-04-09	NKTR	Sale	49,500	96.13	4,758,435
2018-04-09	NKTR	Option Ex	49,500	7.21	356,895
2018-04-06	NKTR	Sale	110,500	91.69	10,131,745
2018-02-16	NKTR	Sale	2,426	82.94	201,212
2017-11-06	NKTR	Sale	20,914	24.98	522,431
2017-11-08	NKTR	Option Ex	300,000	9.53	2,859,000
2017-11-07	NKTR	Sale	75,409	25.78	1,944,044
2017-11-08	NKTR	Sale	300,000	30.09	9,027,000
2017-11-06	NKTR	Option Ex	20,914	9.53	199,310
2017-11-07	NKTR	Option Ex	75,409	9.53	718,647
2017-10-05	NKTR	Option Ex	43,677	9.53	416,241
2017-10-05	NKTR	Sale	43,677	24.97	1,090,614
2017-08-16	NKTR	Sale	1,701	19.32	32,863
2017-05-16	NKTR	Sale	1,701	19.55	33,254
2017-04-05	NKTR	Sale	100,000	21.70	2,170,000
2017-04-05	NKTR	Option Ex	100,000	9.53	952,999
2017-02-16	NKTR	Sale	1,261	13.14	16,569
2016-11-16	NKTR	Sale	670	13.96	9,353
2016-08-16	NKTR	Sale	1,336	17.56	23,460
2016-05-16	NKTR	Option Ex	875	.00	0
2016-05-17	NKTR	Sale	339	13.58	4,603
2016-02-16	NKTR	Option Ex	875	.00	0
2016-02-17	NKTR	Sale	390	11.92	4,648

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 Doberstein Stephen K (Officer of Dicerna Pharmaceuticals Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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