X0609 4 2026-09-23 0000906709 NEKTAR THERAPEUTICS NKTR 0001227886 CHESS ROBERT false C/O NEKTAR THERAPEUTICS 455 MISSION BAY BLVD SOUTH SAN FRANCISCO CA 94158 true false false false false Common Stock 2026-09-23 4 A false 2000 0.00 A 19019 D Common Stock 140 I by daughter Common Stock 140 I by son Common stock 140 I by daughter Stock Option 57.66 2026-09-23 4 A false 4000 0.00 A 2034-09-22 Common Stock 4000 4000 D Common stock was acquired pursuant to a grant of restricted stock units ("RSUs"). Each RSU awarded represents a contingent right to receive, upon vesting of the unit, one share of the Issuer's common stock. This RSU award vests in full, one year following September 23, 2026. On June 8, 2025, the Issuer effected a one-for-fifteen reverse stock split of its common stock (the "Reverse Stock Split"). All amounts of securities listed herein have been adjusted to reflect the effect of the Reverse Stock Split. The reporting person disclaims beneficial ownership of these shares, and this report shall not be deemed an admission that the reporting person is the beneficial owner of these shares for the purposes of Section 16 or for any other purpose. This stock option vests in substantially equal monthly installments over the one-year period beginning on September 23, 2026. Elizabeth Zhang, Attorney-in-Fact 2026-09-25