NKTR

Nektar Therapeutics

Insider trading activity for Nektar Therapeutics, straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$441.1K

net selling

Bought(0 · 0 insiders): $0
Sold(3 · 2 insiders): $441.1K

Past 6 months

-$2M

net selling

Bought(0 · 0 insiders): $0
Sold(10 · 2 insiders): $2M

Past 12 months

-$2.4M

net selling

Bought(0 · 0 insiders): $0
Sold(16 · 3 insiders): $2.4M

Transaction history

The 69 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 23	Whitfield Roy A	Director	AGRANT◆	4,000	—	—	—	Open the original filing on SEC.gov
Sep 23	Whitfield Roy A	Director	AGRANT	2,000	—	—	+13.9%	Open the original filing on SEC.gov
Sep 23	Greer R Scott	Director	AGRANT◆	4,000	—	—	—	Open the original filing on SEC.gov
Sep 23	Greer R Scott	Director	AGRANT	2,000	—	—	+9.9%	Open the original filing on SEC.gov
Sep 23	Chess Robert	Director	AGRANT◆	4,000	—	—	—	Open the original filing on SEC.gov
Sep 23	Chess Robert	Director	AGRANT	2,000	—	—	+11.8%	Open the original filing on SEC.gov
Sep 23	Brainard Diana	Director	AGRANT◆	4,000	—	—	—	Open the original filing on SEC.gov
Sep 23	Brainard Diana	Director	AGRANT	2,000	—	—	+105.0%	Open the original filing on SEC.gov
Sep 23	Ajer Jeffrey Robert	Director	AGRANT◆	4,000	—	—	—	Open the original filing on SEC.gov
Sep 23	Ajer Jeffrey Robert	Director	AGRANT	2,000	—	—	+87.8%	Open the original filing on SEC.gov
Aug 18	Zalevsky Jonathan	Chief R&D Officer	SSELL	186	$71.98	$13.4K	-1.9%	Open the original filing on SEC.gov
Aug 18	Robin Howard W	President & CEO	SSELL	418	$71.98	$30.1K	-0.8%	Open the original filing on SEC.gov
Jul 24	Zalevsky Jonathan	Chief R&D Officer	AGRANT◆	16,500	—	—	—	Open the original filing on SEC.gov
Jul 24	Robin Howard W	President & CEO	AGRANT◆	57,200	—	—	—	Open the original filing on SEC.gov
Jun 30	Zalevsky Jonathan	Chief R&D Officer	SSELL◷	5,681	$70.00	$397.7K	-36.8%	Open the original filing on SEC.gov
Jun 17	Robin Howard W	President & CEO	SSELL◷	4,500	$61.65	$277.4K	-7.6%	Open the original filing on SEC.gov
Jun 17	Robin Howard W	President & CEO	SSELL◷	5,500	$60.81	$334.5K	-8.5%	Open the original filing on SEC.gov
Jun 16	Robin Howard W	President & CEO	SSELL◷	4,697	$60.71	$285.2K	-6.7%	Open the original filing on SEC.gov
Jun 16	Robin Howard W	President & CEO	SSELL◷	5,303	$59.97	$318K	-7.1%	Open the original filing on SEC.gov
Jun 15	Zalevsky Jonathan	Chief R&D Officer	SSELL◷	5,538	$60.71	$336.2K	-26.4%	Open the original filing on SEC.gov
May 19	Zalevsky Jonathan	Chief R&D Officer	SSELL	199	$65.51	$13K	-0.9%	Open the original filing on SEC.gov
May 19	Robin Howard W	President & CEO	SSELL	444	$65.51	$29.1K	-0.6%	Open the original filing on SEC.gov
Feb 18	Zalevsky Jonathan	Chief R&D Officer	SSELL	180	$73.00	$13.1K	-0.8%	Open the original filing on SEC.gov
Feb 18	Robin Howard W	President & CEO	SSELL	423	$73.00	$30.9K	-0.6%	Open the original filing on SEC.gov
Jan 20	Zalevsky Jonathan	Chief R&D Officer	SSELL◷	3,867	$35.67	$137.9K	-15.3%	Open the original filing on SEC.gov
Dec 22, 2025	Zalevsky Jonathan	Chief R&D Officer	AGRANT◆	25,000	—	—	—	Open the original filing on SEC.gov
Dec 22, 2025	Zalevsky Jonathan	Chief R&D Officer	AGRANT	6,250	—	—	+33.0%	Open the original filing on SEC.gov
Dec 22, 2025	Robin Howard W	President & CEO	AGRANT◆	86,667	—	—	—	Open the original filing on SEC.gov
Dec 22, 2025	Robin Howard W	President & CEO	AGRANT	21,667	—	—	+39.9%	Open the original filing on SEC.gov
Nov 25, 2025	Zalevsky Jonathan	Chief R&D Officer	SSELL	1,157	$54.28	$62.8K	-5.8%	Open the original filing on SEC.gov
Nov 25, 2025	Wilson Mark Andrew	Chief Legal Officer	SSELL	630	$54.28	$34.2K	-2.8%	Open the original filing on SEC.gov
Nov 25, 2025	Robin Howard W	President & CEO	SSELL	2,207	$54.28	$119.8K	-3.9%	Open the original filing on SEC.gov
Nov 21, 2025	Zalevsky Jonathan	Chief R&D Officer	AGRANT◆	4,766	—	—	—	Open the original filing on SEC.gov
Nov 21, 2025	Zalevsky Jonathan	Chief R&D Officer	AGRANT	2,666	—	—	+15.3%	Open the original filing on SEC.gov
Nov 21, 2025	Wilson Mark Andrew	Chief Legal Officer	AGRANT◆	3,400	—	—	—	Open the original filing on SEC.gov
Nov 21, 2025	Wilson Mark Andrew	Chief Legal Officer	AGRANT	1,903	—	—	+9.4%	Open the original filing on SEC.gov
Nov 21, 2025	Robin Howard W	President & CEO	AGRANT◆	12,170	—	—	—	Open the original filing on SEC.gov
Nov 21, 2025	Robin Howard W	President & CEO	AGRANT	7,110	—	—	+14.4%	Open the original filing on SEC.gov
Sep 30, 2025	Whitfield Roy A	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Greer R Scott	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Chess Robert	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Brainard Diana	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Sep 30, 2025	Ajer Jeffrey Robert	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Sep 9, 2025	Robin Howard W	President & CEO	SSELL◷	1,210	$48.18	$58.3K	-2.4%	Open the original filing on SEC.gov
Sep 9, 2025	Robin Howard W	President & CEO	SSELL◷	2,156	$47.49	$102.4K	-4.1%	Open the original filing on SEC.gov
Sep 9, 2025	Robin Howard W	President & CEO	SSELL◷	1,200	$46.41	$55.7K	-2.2%	Open the original filing on SEC.gov
Sep 9, 2025	Robin Howard W	President & CEO	SSELL◷	2,100	$45.16	$94.8K	-3.8%	Open the original filing on SEC.gov
Sep 5, 2025	Robin Howard W	President & CEO	SSELL◷	1,136	$39.89	$45.3K	-2.0%	Open the original filing on SEC.gov
Sep 5, 2025	Robin Howard W	President & CEO	SSELL◷	2,226	$38.82	$86.4K	-3.8%	Open the original filing on SEC.gov
Sep 5, 2025	Robin Howard W	President & CEO	SSELL◷	3,304	$37.87	$125.1K	-5.3%	Open the original filing on SEC.gov
Sep 4, 2025	Zalevsky Jonathan	Chief R&D Officer	SSELL◷	307	$35.69	$11K	-1.7%	Open the original filing on SEC.gov
Sep 4, 2025	Zalevsky Jonathan	Chief R&D Officer	SSELL◷	189	$34.41	$6.5K	-1.1%	Open the original filing on SEC.gov
Sep 4, 2025	Zalevsky Jonathan	Chief R&D Officer	SSELL◷	432	$33.60	$14.5K	-2.4%	Open the original filing on SEC.gov
Sep 4, 2025	Zalevsky Jonathan	Chief R&D Officer	SSELL◷	793	$32.43	$25.7K	-4.1%	Open the original filing on SEC.gov
Sep 4, 2025	Robin Howard W	President & CEO	SSELL◷	1,134	$35.80	$40.6K	-1.8%	Open the original filing on SEC.gov
Sep 4, 2025	Robin Howard W	President & CEO	SSELL◷	613	$34.40	$21.1K	-0.9%	Open the original filing on SEC.gov
Sep 4, 2025	Robin Howard W	President & CEO	SSELL◷	1,496	$33.54	$50.2K	-2.3%	Open the original filing on SEC.gov
Sep 4, 2025	Robin Howard W	President & CEO	SSELL◷	1,923	$32.37	$62.2K	-2.8%	Open the original filing on SEC.gov
Sep 2, 2025	Zalevsky Jonathan	Chief R&D Officer	SSELL◷	485	$30.10	$14.6K	-2.5%	Open the original filing on SEC.gov
Sep 2, 2025	Robin Howard W	President & CEO	SSELL◷	1,500	$30.16	$45.2K	-2.2%	Open the original filing on SEC.gov
Aug 19, 2025	Zalevsky Jonathan	Chief R&D Officer	AGRANT◆	16,666	—	—	—	Open the original filing on SEC.gov
Aug 19, 2025	Zalevsky Jonathan	Chief R&D Officer	SSELL	725	$26.59	$19.3K	-3.6%	Open the original filing on SEC.gov
Aug 19, 2025	Wilson Mark Andrew	Chief Legal Officer	AGRANT◆	21,666	—	—	—	Open the original filing on SEC.gov
Aug 19, 2025	Wilson Mark Andrew	Chief Legal Officer	SSELL	676	$26.59	$18K	-3.2%	Open the original filing on SEC.gov
Aug 19, 2025	Robin Howard W	President & CEO	AGRANT◆	86,666	—	—	—	Open the original filing on SEC.gov
Aug 19, 2025	Robin Howard W	President & CEO	SSELL	1,573	$26.59	$41.8K	-2.2%	Open the original filing on SEC.gov
May 19, 2025	Zalevsky Jonathan	Chief R&D Officer	SSELL	10,712	$0.67	$7.2K	-3.4%	Open the original filing on SEC.gov
May 19, 2025	Wilson Mark Andrew	Chief Legal Officer	SSELL	9,996	$0.67	$6.7K	-3.1%	Open the original filing on SEC.gov
May 19, 2025	Robin Howard W	President & CEO	SSELL	23,208	$0.67	$15.5K	-2.1%	Open the original filing on SEC.gov

AGRANT◆—

Whitfield Roy A · DirectorSep 23

4,000 sh

AGRANT—

Whitfield Roy A · DirectorSep 23

2,000 sh · +13.9% own

AGRANT◆—

Greer R Scott · DirectorSep 23

4,000 sh

AGRANT—

Greer R Scott · DirectorSep 23

2,000 sh · +9.9% own

AGRANT◆—

Chess Robert · DirectorSep 23

4,000 sh

AGRANT—

Chess Robert · DirectorSep 23

2,000 sh · +11.8% own

AGRANT◆—

Brainard Diana · DirectorSep 23

4,000 sh

AGRANT—

Brainard Diana · DirectorSep 23

2,000 sh · +105.0% own

AGRANT◆—

Ajer Jeffrey Robert · DirectorSep 23

4,000 sh

AGRANT—

Ajer Jeffrey Robert · DirectorSep 23

2,000 sh · +87.8% own

SSELL$13.4K

Zalevsky Jonathan · Chief R&D OfficerAug 18

186 sh @ $71.98 · -1.9% own

SSELL$30.1K

Robin Howard W · President & CEOAug 18

418 sh @ $71.98 · -0.8% own

AGRANT◆—

Zalevsky Jonathan · Chief R&D OfficerJul 24

16,500 sh

AGRANT◆—

Robin Howard W · President & CEOJul 24

57,200 sh

SSELL◷$397.7K

Zalevsky Jonathan · Chief R&D OfficerJun 30

5,681 sh @ $70.00 · -36.8% own

SSELL◷$277.4K

Robin Howard W · President & CEOJun 17

4,500 sh @ $61.65 · -7.6% own

SSELL◷$334.5K

Robin Howard W · President & CEOJun 17

5,500 sh @ $60.81 · -8.5% own

SSELL◷$285.2K

Robin Howard W · President & CEOJun 16

4,697 sh @ $60.71 · -6.7% own

SSELL◷$318K

Robin Howard W · President & CEOJun 16

5,303 sh @ $59.97 · -7.1% own

SSELL◷$336.2K

Zalevsky Jonathan · Chief R&D OfficerJun 15

5,538 sh @ $60.71 · -26.4% own

SSELL$13K

Zalevsky Jonathan · Chief R&D OfficerMay 19

199 sh @ $65.51 · -0.9% own

SSELL$29.1K

Robin Howard W · President & CEOMay 19

444 sh @ $65.51 · -0.6% own

SSELL$13.1K

Zalevsky Jonathan · Chief R&D OfficerFeb 18

180 sh @ $73.00 · -0.8% own

SSELL$30.9K

Robin Howard W · President & CEOFeb 18

423 sh @ $73.00 · -0.6% own

SSELL◷$137.9K

Zalevsky Jonathan · Chief R&D OfficerJan 20

3,867 sh @ $35.67 · -15.3% own

AGRANT◆—

Zalevsky Jonathan · Chief R&D OfficerDec 22, 2025

25,000 sh

AGRANT—

Zalevsky Jonathan · Chief R&D OfficerDec 22, 2025

6,250 sh · +33.0% own

AGRANT◆—

Robin Howard W · President & CEODec 22, 2025

86,667 sh

AGRANT—

Robin Howard W · President & CEODec 22, 2025

21,667 sh · +39.9% own

SSELL$62.8K

Zalevsky Jonathan · Chief R&D OfficerNov 25, 2025

1,157 sh @ $54.28 · -5.8% own

SSELL$34.2K

Wilson Mark Andrew · Chief Legal…Nov 25, 2025

630 sh @ $54.28 · -2.8% own

SSELL$119.8K

Robin Howard W · President & CEONov 25, 2025

2,207 sh @ $54.28 · -3.9% own

AGRANT◆—

Zalevsky Jonathan · Chief R&D OfficerNov 21, 2025

4,766 sh

AGRANT—

Zalevsky Jonathan · Chief R&D OfficerNov 21, 2025

2,666 sh · +15.3% own

AGRANT◆—

Wilson Mark Andrew · Chief Legal…Nov 21, 2025

3,400 sh

AGRANT—

Wilson Mark Andrew · Chief Legal…Nov 21, 2025

1,903 sh · +9.4% own

AGRANT◆—

Robin Howard W · President & CEONov 21, 2025

12,170 sh

AGRANT—

Robin Howard W · President & CEONov 21, 2025

7,110 sh · +14.4% own

AGRANT◆—

Whitfield Roy A · DirectorSep 30, 2025

8,000 sh

AGRANT◆—

Greer R Scott · DirectorSep 30, 2025

8,000 sh

AGRANT◆—

Chess Robert · DirectorSep 30, 2025

8,000 sh

AGRANT◆—

Brainard Diana · DirectorSep 30, 2025

8,000 sh

AGRANT◆—

Ajer Jeffrey Robert · DirectorSep 30, 2025

8,000 sh

SSELL◷$58.3K

Robin Howard W · President & CEOSep 9, 2025

1,210 sh @ $48.18 · -2.4% own

SSELL◷$102.4K

Robin Howard W · President & CEOSep 9, 2025

2,156 sh @ $47.49 · -4.1% own

SSELL◷$55.7K

Robin Howard W · President & CEOSep 9, 2025

1,200 sh @ $46.41 · -2.2% own

SSELL◷$94.8K

Robin Howard W · President & CEOSep 9, 2025

2,100 sh @ $45.16 · -3.8% own

SSELL◷$45.3K

Robin Howard W · President & CEOSep 5, 2025

1,136 sh @ $39.89 · -2.0% own

SSELL◷$86.4K

Robin Howard W · President & CEOSep 5, 2025

2,226 sh @ $38.82 · -3.8% own

SSELL◷$125.1K

Robin Howard W · President & CEOSep 5, 2025

3,304 sh @ $37.87 · -5.3% own

SSELL◷$11K

Zalevsky Jonathan · Chief R&D OfficerSep 4, 2025

307 sh @ $35.69 · -1.7% own

SSELL◷$6.5K

Zalevsky Jonathan · Chief R&D OfficerSep 4, 2025

189 sh @ $34.41 · -1.1% own

SSELL◷$14.5K

Zalevsky Jonathan · Chief R&D OfficerSep 4, 2025

432 sh @ $33.60 · -2.4% own

SSELL◷$25.7K

Zalevsky Jonathan · Chief R&D OfficerSep 4, 2025

793 sh @ $32.43 · -4.1% own

SSELL◷$40.6K

Robin Howard W · President & CEOSep 4, 2025

1,134 sh @ $35.80 · -1.8% own

SSELL◷$21.1K

Robin Howard W · President & CEOSep 4, 2025

613 sh @ $34.40 · -0.9% own

SSELL◷$50.2K

Robin Howard W · President & CEOSep 4, 2025

1,496 sh @ $33.54 · -2.3% own

SSELL◷$62.2K

Robin Howard W · President & CEOSep 4, 2025

1,923 sh @ $32.37 · -2.8% own

SSELL◷$14.6K

Zalevsky Jonathan · Chief R&D OfficerSep 2, 2025

485 sh @ $30.10 · -2.5% own

SSELL◷$45.2K

Robin Howard W · President & CEOSep 2, 2025

1,500 sh @ $30.16 · -2.2% own

AGRANT◆—

Zalevsky Jonathan · Chief R&D OfficerAug 19, 2025

16,666 sh

SSELL$19.3K

Zalevsky Jonathan · Chief R&D OfficerAug 19, 2025

725 sh @ $26.59 · -3.6% own

AGRANT◆—

Wilson Mark Andrew · Chief Legal…Aug 19, 2025

21,666 sh

SSELL$18K

Wilson Mark Andrew · Chief Legal…Aug 19, 2025

676 sh @ $26.59 · -3.2% own

AGRANT◆—

Robin Howard W · President & CEOAug 19, 2025

86,666 sh

SSELL$41.8K

Robin Howard W · President & CEOAug 19, 2025

1,573 sh @ $26.59 · -2.2% own

SSELL$7.2K

Zalevsky Jonathan · Chief R&D OfficerMay 19, 2025

10,712 sh @ $0.67 · -3.4% own

SSELL$6.7K

Wilson Mark Andrew · Chief Legal…May 19, 2025

9,996 sh @ $0.67 · -3.1% own

SSELL$15.5K

Robin Howard W · President & CEOMay 19, 2025

23,208 sh @ $0.67 · -2.1% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

All 36 filings we hold were filed within the two-business-day deadline.

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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