FMR LLC
· Added
Change
+4.2M
Δ Own
+4155.1%
Date
Q1 2026
NK
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
FMR LLC
· Added
Change
+4.2M
Δ Own
+4155.1%
Date
Q1 2026
|
FMR LLC | Added· Q1 2026 | – | +4.2M | +4155.1% | Q1 2026 | |||||
|
Two Seas Capital LP
· Added
Change
+1.2M
Date
Q1 2026
|
Two Seas Capital LP | Added· Q1 2026 | – | +1.2M | – | Q1 2026 | |||||
|
Bvf Inc
· Added
Change
+1.0M
Date
Q1 2026
|
Bvf Inc | Added· Q1 2026 | – | +1.0M | – | Q1 2026 | |||||
|
Two Sigma Investments, LP
· Added
Change
+458K
Δ Own
+96.8%
Date
Q1 2026
|
Two Sigma Investments, LP | Added· Q1 2026 | – | +458K | +96.8% | Q1 2026 | |||||
|
Vanguard
· Added
Change
+449K
Date
Q1 2026
|
Vanguard | Added· Q1 2026 | – | +449K | – | Q1 2026 | |||||
|
Point72 Asset Management, L.P.
· Reduced
Change
−420K
Δ Own
−96.9%
Date
Q1 2026
|
Point72 Asset Management, L.P. | Reduced· Q1 2026 | – | −420K | −96.9% | Q1 2026 | |||||
|
Lord, Abbett & Co. LLC
· New
Change
+405K
Date
Q1 2026
|
Lord, Abbett & Co. LLC | New· Q1 2026 | – | +405K | – | Q1 2026 | |||||
|
Woodline Partners LP
· Added
Change
+311K
Date
Q1 2026
|
Woodline Partners LP | Added· Q1 2026 | – | +311K | – | Q1 2026 | |||||
|
Two Sigma Advisers, LP
· Exited
Change
−308K
Δ Own
−100.0%
Date
Q1 2026
|
Two Sigma Advisers, LP | Exited· Q1 2026 | – | −308K | −100.0% | Q1 2026 | |||||
|
Voloridge Investment Management, LLC
· Exited
Change
−296K
Δ Own
−100.0%
Date
Q1 2026
|
Voloridge Investment Management, LLC | Exited· Q1 2026 | – | −296K | −100.0% | Q1 2026 | |||||
|
Vestal Point Capital, LP
· New
Change
+285K
Date
Q1 2026
|
Vestal Point Capital, LP | New· Q1 2026 | – | +285K | – | Q1 2026 | |||||
|
Orbimed Advisors LLC
· New
Change
+275K
Date
Q1 2026
|
Orbimed Advisors LLC | New· Q1 2026 | – | +275K | – | Q1 2026 | |||||
|
Balyasny Asset Management L.P.
· Reduced
Change
−246K
Date
Q1 2026
|
Balyasny Asset Management L.P. | Reduced· Q1 2026 | – | −246K | – | Q1 2026 | |||||
|
Braidwell LP
· New
Change
+223K
Date
Q1 2026
|
Braidwell LP | New· Q1 2026 | – | +223K | – | Q1 2026 | |||||
|
Patient Square Capital LP
· New
Change
+210K
Date
Q1 2026
|
Patient Square Capital LP | New· Q1 2026 | – | +210K | – | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Zalevsky Jonathan
· Officer
Grant (A)
16K
|
Zalevsky Jonathan | Officer | Grant (A) | – | 16K | – | 16K | – | Jul 24, 2026 | Jul 24, 2026 | |||||||||
|
Robin Howard W.
· Director
Grant (A)
57K
|
Robin Howard W. | Director | Grant (A) | – | 57K | – | 57K | – | Jul 24, 2026 | Jul 24, 2026 | |||||||||
|
Zalevsky Jonathan
· Officer
Sell
−$398K
|
Zalevsky Jonathan | Officer | Sell | $70.00 | −6K | −$398K | 10K | −36.8% | Jun 30, 2026 | Jul 2, 2026 | |||||||||
|
Robin Howard W.
· Director
2 operations
−$612K
|
Robin Howard W. | Director | 2 operations | $60.81–$61.65 | −10K | −$612K | 55K | – | Jun 17, 2026 | Jun 18, 2026 | |||||||||
|
Robin Howard W.
· Director
2 operations
−$603K
|
Robin Howard W. | Director | 2 operations | $59.97–$60.71 | −10K | −$603K | 65K | – | Jun 16, 2026 | Jun 18, 2026 | |||||||||
|
Zalevsky Jonathan
· Officer
Sell
−$336K
|
Zalevsky Jonathan | Officer | Sell | $60.71 | −6K | −$336K | 15K | – | Jun 15, 2026 | Jun 17, 2026 | |||||||||
|
Zalevsky Jonathan
· Officer
Sell
−$13K
|
Zalevsky Jonathan | Officer | Sell | $65.51 | −199 | −$13K | 21K | – | May 19, 2026 | May 21, 2026 | |||||||||
|
Robin Howard W.
· Director
Sell
−$29K
|
Robin Howard W. | Director | Sell | $65.51 | −444 | −$29K | 75K | – | May 19, 2026 | May 21, 2026 | |||||||||
|
Zalevsky Jonathan
· Officer
Sell
−$13K
|
Zalevsky Jonathan | Officer | Sell | $73.00 | −180 | −$13K | 21K | – | Feb 18, 2026 | Feb 20, 2026 | |||||||||
|
Robin Howard W.
· Director, Officer
Sell
−$31K
|
Robin Howard W. | Director, Officer | Sell | $73.00 | −423 | −$31K | 75K | – | Feb 18, 2026 | Feb 20, 2026 | |||||||||
|
Zalevsky Jonathan
· Officer
Sell
−$138K
|
Zalevsky Jonathan | Officer | Sell | $35.67 | −4K | −$138K | 21K | – | Jan 20, 2026 | Jan 22, 2026 | |||||||||
|
Zalevsky Jonathan
· Officer
2 operations
31K
|
Zalevsky Jonathan | Officer | 2 operations | – | 31K | – | 25K | – | Dec 22, 2025 | Dec 23, 2025 | |||||||||
|
Robin Howard W.
· Director, Officer
2 operations
108K
|
Robin Howard W. | Director, Officer | 2 operations | – | 108K | – | 87K | – | Dec 22, 2025 | Dec 23, 2025 | |||||||||
|
Zalevsky Jonathan
· Officer
Sell
−$63K
|
Zalevsky Jonathan | Officer | Sell | $54.28 | −1K | −$63K | 19K | – | Nov 25, 2025 | Nov 25, 2025 | |||||||||
|
Wilson Mark Andrew
· Officer
Sell
−$34K
|
Wilson Mark Andrew | Officer | Sell | $54.28 | −630 | −$34K | 22K | – | Nov 25, 2025 | Nov 25, 2025 | |||||||||
N
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A
219 reporting institutions disclosed NKTR position changes in the Q1 2026 snapshot.
For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.
An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.
Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.
Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.
A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.