NKTR Insider Trading

Net Selling · 180d
Open-Market Buys (180d)
$0
0 insiders
Open-Market Sells (180d)
$2.2M
2 insiders
Net Insider Flow
-$2.2M
open market, 180d
Reporting Insiders
2
11 P/S transactions
Build

Build on these Form 4 transactions

The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.

Recent Form 4 Transactions

100 shown
DateInsiderRoleActionSharesPriceValue
Jun 30, 2026Zalevsky JonathanChief R&D OfficerSell(S)6K$70.00$398K
Jun 17, 2026Robin Howard WPresident & CEO, DirectorSell(S)6K$60.81$334K
Jun 17, 2026Robin Howard WPresident & CEO, DirectorSell(S)5K$61.65$277K
Jun 16, 2026Robin Howard WPresident & CEO, DirectorSell(S)5K$59.97$318K
Jun 16, 2026Robin Howard WPresident & CEO, DirectorSell(S)5K$60.71$285K
Jun 15, 2026Zalevsky JonathanChief R&D OfficerSell(S)6K$60.71$336K
May 19, 2026Robin Howard WPresident & CEO, DirectorSell(S)444$65.51$29K
May 19, 2026Zalevsky JonathanChief R&D OfficerSell(S)199$65.51$13K
Feb 18, 2026Robin Howard WPresident & CEO, DirectorSell(S)423$73.00$31K
Feb 18, 2026Zalevsky JonathanChief R&D OfficerSell(S)180$73.00$13K
Jan 20, 2026Zalevsky JonathanChief R&D OfficerSell(S)4K$35.67$138K
Dec 22, 2025Robin Howard WPresident & CEO, DirectorGrant(A)22K$0
Dec 22, 2025Robin Howard WPresident & CEO, DirectorGrant(A)87K$0
Dec 22, 2025Zalevsky JonathanChief R&D OfficerGrant(A)6K$0
Dec 22, 2025Zalevsky JonathanChief R&D OfficerGrant(A)25K$0
Nov 25, 2025Robin Howard WPresident & CEO, DirectorSell(S)2K$54.28$120K
Nov 25, 2025Wilson Mark AndrewChief Legal OfficerSell(S)630$54.28$34K
Nov 25, 2025Zalevsky JonathanChief R&D OfficerSell(S)1K$54.28$63K
Nov 21, 2025Robin Howard WPresident & CEO, DirectorGrant(A)7K$0
Nov 21, 2025Robin Howard WPresident & CEO, DirectorGrant(A)12K$0
Nov 21, 2025Wilson Mark AndrewChief Legal OfficerGrant(A)2K$0
Nov 21, 2025Wilson Mark AndrewChief Legal OfficerGrant(A)3K$0
Nov 21, 2025Zalevsky JonathanChief R&D OfficerGrant(A)3K$0
Nov 21, 2025Zalevsky JonathanChief R&D OfficerGrant(A)5K$0
Sep 30, 2025Ajer Jeffrey RobertDirectorGrant(A)8K$0
Sep 30, 2025Brainard DianaDirectorGrant(A)8K$0
Sep 30, 2025Chess RobertDirectorGrant(A)8K$0
Sep 30, 2025Greer R ScottDirectorGrant(A)8K$0
Sep 30, 2025Whitfield Roy ADirectorGrant(A)8K$0
Sep 9, 2025Robin Howard WPresident & CEO, DirectorSell(S)2K$45.16$95K
Sep 9, 2025Robin Howard WPresident & CEO, DirectorSell(S)1K$46.41$56K
Sep 9, 2025Robin Howard WPresident & CEO, DirectorSell(S)2K$47.49$102K
Sep 9, 2025Robin Howard WPresident & CEO, DirectorSell(S)1K$48.18$58K
Sep 5, 2025Robin Howard WPresident & CEO, DirectorSell(S)3K$37.87$125K
Sep 5, 2025Robin Howard WPresident & CEO, DirectorSell(S)2K$38.82$86K
Sep 5, 2025Robin Howard WPresident & CEO, DirectorSell(S)1K$39.89$45K
Sep 4, 2025Robin Howard WPresident & CEO, DirectorSell(S)2K$32.37$62K
Sep 4, 2025Robin Howard WPresident & CEO, DirectorSell(S)1K$33.54$50K
Sep 4, 2025Robin Howard WPresident & CEO, DirectorSell(S)613$34.40$21K
Sep 4, 2025Robin Howard WPresident & CEO, DirectorSell(S)1K$35.80$41K
Sep 4, 2025Zalevsky JonathanChief R&D OfficerSell(S)307$35.69$11K
Sep 4, 2025Zalevsky JonathanChief R&D OfficerSell(S)189$34.41$7K
Sep 4, 2025Zalevsky JonathanChief R&D OfficerSell(S)793$32.43$26K
Sep 4, 2025Zalevsky JonathanChief R&D OfficerSell(S)432$33.60$15K
Sep 2, 2025Robin Howard WPresident & CEO, DirectorSell(S)2K$30.16$45K
Sep 2, 2025Zalevsky JonathanChief R&D OfficerSell(S)485$30.10$15K
Aug 19, 2025Robin Howard WPresident & CEO, DirectorSell(S)2K$26.59$42K
Aug 19, 2025Robin Howard WPresident & CEO, DirectorGrant(A)87K$0
Aug 19, 2025Wilson Mark AndrewChief Legal OfficerSell(S)676$26.59$18K
Aug 19, 2025Wilson Mark AndrewChief Legal OfficerGrant(A)22K$0
Aug 19, 2025Zalevsky JonathanChief R&D OfficerSell(S)725$26.59$19K
Aug 19, 2025Zalevsky JonathanChief R&D OfficerGrant(A)17K$0
May 19, 2025Robin Howard WPresident & CEO, DirectorSell(S)23K$0.67$16K
May 19, 2025Wilson Mark AndrewChief Legal OfficerSell(S)10K$0.67$7K
May 19, 2025Zalevsky JonathanChief R&D OfficerSell(S)11K$0.67$7K
Feb 19, 2025Robin Howard WPresident & CEO, DirectorSell(S)24K$1.01$24K
Feb 19, 2025Wilson Mark AndrewChief Legal OfficerSell(S)11K$1.01$11K
Feb 19, 2025Zalevsky JonathanChief R&D OfficerSell(S)10K$1.01$10K
Dec 24, 2024Wilson Mark AndrewChief Legal OfficerSell(S)17K$0.89$15K
Dec 23, 2024Wilson Mark AndrewChief Legal OfficerSell(S)33K$0.90$30K
Dec 19, 2024Zalevsky JonathanChief R&D OfficerSell(S)51K$0.94$48K
Dec 18, 2024Robin Howard WPresident & CEO, DirectorSell(S)85K$0.99$84K
Dec 17, 2024Robin Howard WPresident & CEO, DirectorSell(S)47K$1.01$47K
Dec 13, 2024Robin Howard WPresident & CEO, DirectorGrant(A)411K$0
Dec 13, 2024Robin Howard WPresident & CEO, DirectorGrant(A)1.3M$0
Dec 13, 2024Robin Howard WPresident & CEO, DirectorGrant(A)821K$0
Dec 13, 2024Wilson Mark AndrewChief Legal OfficerGrant(A)166K$0
Dec 13, 2024Wilson Mark AndrewChief Legal OfficerGrant(A)325K$0
Dec 13, 2024Wilson Mark AndrewChief Legal OfficerGrant(A)332K$0
Dec 13, 2024Zalevsky JonathanChief R&D OfficerGrant(A)135K$0
Dec 13, 2024Zalevsky JonathanChief R&D OfficerGrant(A)375K$0
Dec 13, 2024Zalevsky JonathanChief R&D OfficerGrant(A)270K$0
Nov 19, 2024Robin Howard WPresident & CEO, DirectorSell(S)16K$1.01$16K
Nov 19, 2024Wilson Mark AndrewChief Legal OfficerSell(S)6K$1.01$6K
Nov 19, 2024Zalevsky JonathanChief R&D OfficerSell(S)8K$1.01$8K
Aug 19, 2024Robin Howard WPresident & CEO, DirectorSell(S)15K$1.28$19K
Aug 19, 2024Wilson Mark AndrewChief Legal OfficerSell(S)6K$1.28$7K
Aug 19, 2024Zalevsky JonathanChief R&D OfficerSell(S)7K$1.28$9K
Jun 14, 2024Chess RobertDirectorSell(S)20K$1.20$23K
May 17, 2024Wilson Mark AndrewChief Legal OfficerSell(S)6K$1.75$11K
May 17, 2024Zalevsky JonathanChief R&D OfficerSell(S)7K$1.75$13K
May 17, 2024Robin Howard WPresident & CEO, DirectorSell(S)17K$1.75$29K
May 10, 2024Kroin David10% OwnerSell(S)56K$1.78$100K
Feb 20, 2024Robin Howard WPresident & CEO, DirectorSell(S)20K$0.68$14K
Feb 20, 2024Wilson Mark AndrewChief Legal OfficerSell(S)8K$0.68$5K
Feb 20, 2024Zalevsky JonathanChief R&D OfficerSell(S)9K$0.68$6K
Dec 13, 2023Robin Howard WPresident & CEO, DirectorGrant(A)1.3M$0
Dec 13, 2023Wilson Mark AndrewChief Legal OfficerGrant(A)325K$0
Dec 13, 2023Zalevsky JonathanChief R&D OfficerGrant(A)250K$0
Nov 17, 2023Robin Howard WPresident & CEO, DirectorSell(S)20K$0.49$10K
Nov 17, 2023Wilson Mark AndrewChief Legal OfficerSell(S)7K$0.49$4K
Nov 17, 2023Zalevsky JonathanChief R&D OfficerSell(S)10K$0.49$5K
Sep 19, 2023Ajer Jeffrey RobertDirectorGrant(A)85K$0
Sep 19, 2023Brainard DianaDirectorGrant(A)85K$0
Sep 19, 2023Chess RobertDirectorGrant(A)85K$0
Sep 19, 2023Curet MyriamDirectorGrant(A)85K$0
Sep 19, 2023Whitfield Roy ADirectorGrant(A)85K$0
Sep 19, 2023Greer R ScottDirectorGrant(A)85K$0
Sep 18, 2023Ajer Jeffrey RobertDirectorSell(S)4K$0.69$3K
Sep 18, 2023Curet MyriamDirectorSell(S)4K$0.69$3K

Data Source

Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.

Coverage: Form 4 filings indexed 2021-03-292026-07-11. Earlier history is backfilling; this window widens as it deepens.

Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).