Doberstein Stephen K (CIK 0001480111)

Latest company ownership

NKTR - NEKTAR THERAPEUTICS
Role: SVP & Chief Scientific Officer
Shares held
107,668
Last filed at
Sep 9, 2019
Confidence Score
50.0
2025Q4
Confidence Score History
2016Q1 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Sep 5, 2019 Sep 9, 2019 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Buy 97.5 +15,000 16.19% ✗ $259.2K
Aug 16, 2019 Aug 19, 2019 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 42.5 -3,245 -3.38% ✗ $58.9K
May 16, 2019 May 17, 2019 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 42.5 -3,461 -3.48% ✗ $108.6K
Feb 19, 2019 Feb 21, 2019 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 42.5 -3,310 -3.22% ✗ $140.3K
Nov 16, 2018 Nov 19, 2018 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 42.5 -4,524 -5.43% ✗ $173K
Aug 15, 2018 Aug 16, 2018 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 97.5 +19,299 30.17% ✗ $391.3K
May 16, 2018 May 18, 2018 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 40.0 -3,435 -5.10% ✗ $286.4K
Apr 6, 2018 Apr 9, 2018 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 2.5 -160,000 -54.28% ✓ $14.9M
Feb 16, 2018 Feb 20, 2018 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 42.5 -2,426 -3.47% ✗ $201.2K
Nov 15, 2017 Nov 17, 2017 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 95.0 +12,718 40.89% ✗ $211.5K
Nov 6, 2017 Nov 8, 2017 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 2.5 -396,323 -80.94% ✓ $11.5M
Oct 5, 2017 Oct 10, 2017 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 5.0 -43,677 -58.41% ✓ $1.1M
Aug 16, 2017 Aug 18, 2017 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 46.3 -1,701 -5.19% ✗ $32.9K
May 16, 2017 May 18, 2017 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 46.3 -1,701 -4.93% ✗ $33.3K
Apr 5, 2017 Apr 7, 2017 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 5.0 -100,000 -74.35% ✓ $2.2M
Feb 16, 2017 Feb 17, 2017 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 26.3 -1,261 -3.53% ✗ $16.6K
Nov 16, 2016 Nov 18, 2016 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 27.5 -670 -3.54% ✗ $9.4K
Aug 16, 2016 Aug 17, 2016 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 26.3 -1,336 -6.59% ✗ $23.5K
May 16, 2016 May 18, 2016 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 27.5 -339 -24.93% ✗ $4.6K
Feb 16, 2016 Feb 18, 2016 NEKTAR THERAPEUTICS SVP & Chief Scientific Officer Sell 27.5 -390 -44.57% ✗ $4.6K