Comparable stake leader
FMR LLC
SEC ownership of NEKTAR THERAPEUTICS
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000906709.
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- NKTR on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
FMR LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
FMR LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000906709
- Issuer location
- San Francisco, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of NEKTAR THERAPEUTICS (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
FMR LLC
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 15%
13D/G row: FMR LLC
Showing 1-8 of 50 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 15%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
15%
BIOTECHNOLOGY VALUE FUND L P
9.8%
BlackRock, Inc.
7.8%
Two Seas Capital LP
6.8%
VANGUARD CAPITAL MANAGEMENT LLC
5.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FMR LLC |
13D/G
|
15%
|
$331,302,473
4,303,188 shares
|
+$97,502,292 | 31 Mar 2026 |
| BIOTECHNOLOGY VALUE FUND L P |
13D/G
BVF PARTNERS L P/IL
|
9.8%
|
$205,394,256
2,852,698 shares
|
$0 | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
7.8%
from 13D/G
|
$205,370,620
2,941,851 shares
|
— | 30 Jun 2026 |
| Two Seas Capital LP |
13D/G
|
6.8%
|
$144,979,172
1,959,178 shares
|
$0 | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
Vanguard Capital Management
|
5.2%
|
$125,656,251
1,747,653 shares
|
$0 | 30 Jun 2026 |
| SUSQUEHANNA SECURITIES, LLC |
13D/G
G1 Execution Services, LLC
|
4%
|
$34,245,405
809,967 shares
|
-$18,006,925 | 31 Dec 2025 |
| EVENTIDE ASSET MANAGEMENT, LLC |
13D/G
|
3.6%
|
$4,921,000
6,650,000 shares
|
$0 | 31 Dec 2024 |
| INTEGRATED CORE STRATEGIES (US) LLC |
13D/G
Millennium Management LLC
|
3%
|
$32,489,559
570,994 shares
|
-$20,590,346 | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$3,328,592.
Buys
$0
Insiders: 0
Sells
$3,328,592
Insiders: 3
Net
-$3,328,592
Shares: -65,504
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 65,504
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 31,862 | $0 | $1,991,061 | -$1,991,061 |
| 3-6 | 0 | 603 | $0 | $44,019 | -$44,019 |
| 6-9 | 0 | 7,861 | $0 | $354,730 | -$354,730 |
| 9-12 | 0 | 25,178 | $0 | $938,782 | -$938,782 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-16 of 16 reporting-owner rows connected to NEKTAR THERAPEUTICS. Open a relationship link for the CIK-to-CIK filing trail.
Rows
16
Largest Forms 3/4/5 holder
Deep Track Capital, LP
Net 12M change
-$3,328,592
Latest report
24 Jul 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Deep Track Capital, LP | 10%+ Owner | $32,635,810 | Filing P/S | 10 May 2024 | ||
| Howard W. Robin | President & CEO, Director | $3,395,538 | -$2,224,056 | -40% | Mixed | 24 Jul 2026 |
| Mark A. Wilson | Chief Legal Officer | $1,171,633 | -$52,171 | -4.3% | Filing P/S | 21 Nov 2025 |
| Jonathan Zalevsky | Chief R&D Officer | $682,920 | -$1,052,365 | -61% | Filing P/S | 24 Jul 2026 |
| Jillian B. Thomsen | Chief Financial Officer | $153,614 | Mixed | 16 Feb 2023 | ||
| Gil M. Labrucherie | Svp, Coo & Cfo | $153,323 | Mixed | 15 May 2022 | ||
| John Northcott | SVP & Chief Commercial Officer | $109,373 | Mixed | 16 May 2022 | ||
| Myriam Curet | Director | $13,435 | Mixed | 18 Sep 2023 | ||
| Karin Eastham | Director | $11,384 | Mixed | 16 Sep 2022 | ||
| Linda M. Rubinstein | Interim CFO | Mixed | 15 May 2026 | |||
| Diana Brainard | Director | Mixed | 30 Sep 2025 | |||
| Jeffrey Robert Ajer | Director | Mixed | 30 Sep 2025 | |||
| R. Scott Greer | Director | Mixed | 30 Sep 2025 | |||
| Robert Chess | Director | Mixed | 30 Sep 2025 | |||
| Roy A. Whitfield | Director | Mixed | 30 Sep 2025 | |||
| Sandra A. Gardiner | Chief Financial Officer | Mixed | 17 Apr 2023 |
Recent insider transactions for NEKTAR THERAPEUTICS
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Jonathan Zalevsky | NKTR | Stock Option | Award | 16,500 | 16,500 | 24 Jul 2026 | Direct | |||
| Howard W. Robin | NKTR | Stock Option | Award | 57,200 | 57,200 | 24 Jul 2026 | Direct | |||
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -36.8% | $397,670 | $70.00 | -5,681 | 9,756 | 30 Jun 2026 | Direct |
| Howard W. Robin | NKTR | Common Stock | Sale | -15.4% | $611,880 | $61.19 | -10,000 | 55,045 | 17 Jun 2026 | Direct |
| Howard W. Robin | NKTR | Common Stock | Sale | -13.3% | $603,176 | $60.32 | -10,000 | 65,045 | 16 Jun 2026 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -26.4% | $336,212 | $60.71 | -5,538 | 15,437 | 15 Jun 2026 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -0.94% | $13,036 | $65.51 | -199 | 20,975 | 19 May 2026 | Direct |
| Howard W. Robin | NKTR | Common Stock | Sale | -0.59% | $29,086 | $65.51 | -444 | 75,045 | 19 May 2026 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -0.84% | $13,140 | $73.00 | -180 | 21,174 | 18 Feb 2026 | Direct |
| Howard W. Robin | NKTR | Common Stock | Sale | -0.56% | $30,879 | $73.00 | -423 | 75,489 | 18 Feb 2026 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -15.3% | $137,936 | $35.67 | -3,867 | 21,354 | 20 Jan 2026 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Award | 33% | 6,250 | 25,221 | 22 Dec 2025 | Direct | ||
| Jonathan Zalevsky | NKTR | Stock Option | Award | 25,000 | 25,000 | 22 Dec 2025 | Direct | |||
| Howard W. Robin | NKTR | Common Stock | Award | 39.9% | 21,667 | 75,912 | 22 Dec 2025 | Direct | ||
| Howard W. Robin | NKTR | Stock Option | Award | 86,667 | 86,667 | 22 Dec 2025 | Direct | |||
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -5.75% | $62,802 | $54.28 | -1,157 | 18,971 | 25 Nov 2025 | Direct |
| Mark A. Wilson | NKTR | Common Stock | Sale | -2.84% | $34,196 | $54.28 | -630 | 21,585 | 25 Nov 2025 | Direct |
| Howard W. Robin | NKTR | Common Stock | Sale | -3.91% | $119,796 | $54.28 | -2,207 | 54,245 | 25 Nov 2025 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Award | 15.3% | 2,666 | 20,128 | 21 Nov 2025 | Direct | ||
| Jonathan Zalevsky | NKTR | Stock Option | Award | 4,766 | 4,766 | 21 Nov 2025 | Direct | |||
| Mark A. Wilson | NKTR | Common Stock | Award | 9.37% | 1,903 | 22,215 | 21 Nov 2025 | Direct | ||
| Mark A. Wilson | NKTR | Stock Option | Award | 3,400 | 3,400 | 21 Nov 2025 | Direct | |||
| Howard W. Robin | NKTR | Common Stock | Award | 14.4% | 7,110 | 56,452 | 21 Nov 2025 | Direct | ||
| Howard W. Robin | NKTR | Stock Option | Award | 12,170 | 12,170 | 21 Nov 2025 | Direct | |||
| Roy A. Whitfield | NKTR | Stock Option | Award | 8,000 | 8,000 | 30 Sep 2025 | Direct | |||
| R. Scott Greer | NKTR | Stock Option | Award | 8,000 | 8,000 | 30 Sep 2025 | Direct | |||
| Robert Chess | NKTR | Stock Option | Award | 8,000 | 8,000 | 30 Sep 2025 | Direct | |||
| Diana Brainard | NKTR | Stock Option | Award | 8,000 | 8,000 | 30 Sep 2025 | Direct | |||
| Jeffrey Robert Ajer | NKTR | Stock Option | Award | 8,000 | 8,000 | 30 Sep 2025 | Direct | |||
| Howard W. Robin | NKTR | Common Stock | Sale | -11.9% | $311,214 | $46.69 | -6,666 | 49,342 | 09 Sep 2025 | Direct |
| Howard W. Robin | NKTR | Common Stock | Sale | -10.6% | $256,851 | $38.53 | -6,666 | 56,008 | 05 Sep 2025 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -8.97% | $57,693 | $33.52 | -1,721 | 17,462 | 04 Sep 2025 | Direct |
| Howard W. Robin | NKTR | Common Stock | Sale | -7.61% | $174,108 | $33.70 | -5,166 | 62,674 | 04 Sep 2025 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -2.47% | $14,598 | $30.10 | -485 | 19,183 | 02 Sep 2025 | Direct |
| Howard W. Robin | NKTR | Common Stock | Sale | -2.16% | $45,240 | $30.16 | -1,500 | 67,840 | 02 Sep 2025 | Direct |
| Jonathan Zalevsky | NKTR | Common Stock | Sale | -3.56% | $19,278 | $26.59 | -725 | 19,668 | 19 Aug 2025 | Direct |
| Jonathan Zalevsky | NKTR | Stock Option | Award | 16,666 | 16,666 | 19 Aug 2025 | Direct | |||
| Mark A. Wilson | NKTR | Common Stock | Sale | -3.22% | $17,975 | $26.59 | -676 | 20,312 | 19 Aug 2025 | Direct |
| Mark A. Wilson | NKTR | Stock Option | Award | 21,666 | 21,666 | 19 Aug 2025 | Direct | |||
| Howard W. Robin | NKTR | Common Stock | Sale | -2.22% | $41,826 | $26.59 | -1,573 | 69,340 | 19 Aug 2025 | Direct |
| Howard W. Robin | NKTR | Stock Option | Award | 86,666 | 86,666 | 19 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.