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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Oct 1, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
- Sep 25, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
- Sep 8, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record1,79219 flagged findings
Reported transactions (Form 4)80since Sep 19, 2023 · and 1 other holding
Corporate events (8-K)30since Dec 22, 2020
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
What the company does
Nektar Therapeutics is an American biopharmaceutical company. The company was founded in 1990 and is based in San Francisco, California. The company develops new drug candidates by applying its proprietary PEGylation and advanced polymer conjugate technologies to modify chemical structure of substances, which improves drug characteristics like retention and solubility. It is a technology supplier to a number of pharmaceutical companies including Affymax, Amgen, Merck, Pfizer and UCB Pharma, etc. The company developed the world's first inhalable non-injectable insulin, Exubera, which was awarded as the bronze award by Wall Street Journal for its technological breakthrough.
Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-04-23share offering or dilution eventrecentOpen filing ↗“…from this offering in ways that enhance stockholder value, we may fail to achieve expected financial results, which could cause…”
+1 more passage from the same document
- “…• sell, offer, contract or grant any option to sell (including any short sale), pledge, transfer, establish an open “put equivalent…”
- 2026-04-23capital return (buybacks/dividends)recentOpen filing ↗“…under the indentures with respect to any series of debt securities that we may issue: • if we fail to pay interest when due and…”
+1 more passage from the same document
- “…we and the trustee may make the following changes only with the consent of each holder of any outstanding debt securities…”
- 2026-04-20share offering or dilution eventrecentOpen filing ↗“…from this offering in ways that enhance stockholder value, we may fail to achieve expected financial results, which could cause…”
+1 more passage from the same document
- “…• sell, offer, contract or grant any option to sell (including any short sale), pledge, transfer, establish an open “put equivalent…”
- 2026-04-20capital return (buybacks/dividends)recentOpen filing ↗“…under the indentures with respect to any series of debt securities that we may issue: • if we fail to pay interest when due and…”
+1 more passage from the same document
- “…we and the trustee may make the following changes only with the consent of each holder of any outstanding debt securities…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
Reverse splits in 5 years
1 reverse split in 5 years (1:15 on Jun 9, 2025) · 1:15 cumulative
The other times: of 818 securities that did their first reverse split in 5 years, a year later the median was worth 0.53× the price on the day of the split; 382 lost more than half and 209 rose (809 with a price a year later).
Our own series, not the whole market: based on the splits we have on record (provider and SEC); an unrecorded one does not count. Historical distribution, not a prediction.
The 25 most recent filings (of 1,792)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Oct 1, 268-K ↗Current report · Communication to the market
- Sep 28, 26SCHEDULE 13G/A ↗Passive stake · Two Seas Capital LP · 9.8% · event on Sep 25, 26 · amendment
- Sep 25, 268-K ↗Current report · Other events
- Sep 8, 268-K ↗Current report · Communication to the market
Notice of proposed sale · 2 Form 144 filingsshow all 2hide
- Aug 18, 26Form 144 ↗Notice of proposed sale
- Aug 18, 26Form 144 ↗Notice of proposed sale
- Aug 14, 2610-Q ↗Quarterly report
- Aug 14, 26SCHEDULE 13G/A ↗Passive stake · Two Seas Capital LP · 9.1% · event on Jun 30, 26 · amendment
- Aug 14, 26SCHEDULE 13G/A ↗Passive stake · BVF PARTNERS L P/IL · 7.1% · event on Jun 30, 26 · amendment
- Aug 13, 268-K ↗Current report · Results
- Jul 31, 26SCHEDULE 13G ↗Passive stake · Vanguard Capital Management · 5.2% · event on Jun 30, 26
- Jul 29, 26SCHEDULE 13G ↗Passive stake · BlackRock, Inc. · 7.8% · event on Jun 30, 26
- Jun 30, 26Form 144 ↗Notice of proposed sale
- Jun 18, 26Form 4 ↗Insider transaction
- Jun 17, 26Form 144 ↗Notice of proposed sale
1,792 filings on record, the oldest from Feb 14, 96.
Listing the 25 most recent filings of the 1,792 on record.
107070
3 material agreements entered2026show all 3hide
- May 8, 26Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Apr 23, 26Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Feb 13, 26Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Nov 21, 25A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Jul 1, 25Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Apr 4, 25Listing notice (8-K 3.01)8-K 3.01 ↗
- Mar 28, 25Entered a material agreement+1 more in the same filing8-K 1.01 ↗
- Dec 2, 24Completed an acquisition or disposal+1 more in the same filing8-K 2.01 ↗
3 material agreements entered2024show all 3hide
- Nov 4, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Mar 4, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Mar 4, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Feb 16, 24A material agreement was terminated+1 more in the same filing8-K 1.02 ↗
- Nov 27, 23Listing notice (8-K 3.01)8-K 3.01 ↗
- Sep 8, 23A material agreement was terminated8-K 1.02 ↗
- Jun 23, 23A senior executive left or was appointed8-K 5.02 ↗
- Jun 2, 23Listing notice (8-K 3.01)8-K 3.01 ↗
10 older filings not shown · The record reaches back to Jan 18, 05.
Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.
- Apr 17, 23Restructuring plan with committed costs+4 more in the same filing8-K 2.05 ↗
- May 2, 22Write-down of assets+1 more in the same filing8-K 2.06 ↗
- Oct 24, 08Restructuring plan with committed costs8-K 2.05 ↗
- Feb 12, 08Restructuring plan with committed costs+3 more in the same filing8-K 2.05 ↗
- May 24, 07Restructuring plan with committed costs+3 more in the same filing8-K 2.05 ↗
- Mar 1, 05Past accounts declared unreliable and being restated+1 more in the same filing8-K 4.02 ↗
The full record holds 10 stress filings.
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- FMR LLC15.0%Mar 31, 26SCHEDULE 13G/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
- Two Seas Capital LP9.8%Sep 25, 26SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum. · 2 earlier filings
- BlackRock, Inc.7.8%Jun 30, 26SCHEDULE 13G ↗
- BVF PARTNERS L P/IL7.1%Jun 30, 26SCHEDULE 13G/A ↗10 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing
- Susquehanna Portfolio Strategies, LLC6.3%Sep 30, 25SCHEDULE 13G ↗2 co-filers on this document — the figure is the largest single stake, not their sum.
show 4 more holdershide
- Vanguard Capital Management5.2%Jun 30, 26SCHEDULE 13G ↗
- The Vanguard Group5.0%Dec 31, 25SCHEDULE 13G ↗
- G1 Execution Services, LLC4.0%Dec 31, 25SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum.
- Nantahala Capital Management, LLC2.2%Sep 30, 25SCHEDULE 13G/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum.
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Aug 18, Zalevsky Jonathan filed notice of intent to sell up to $13K.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
After the notice, they sold $13K on Aug 18, per their Form 4. That is 100% of the shares announced so far, and the window is still open.
View notice (Form 144) ↗+2 more recent notices · 2 with a later sale
- Aug 18, 26Sell$30KHOWARD W ROBINPresident & CEO↗
- Aug 18, 26Sell$13KJonathan ZalevskyChief R&D Officer↗
- Jun 30, 26Sell$398KJonathan ZalevskyChief R&D Officer↗
- Jun 17, 26Sell$334KHOWARD W ROBINPresident & CEO↗
- Jun 17, 26Sell$277KHOWARD W ROBINPresident & CEO↗
- Jun 16, 26Sell$318KHOWARD W ROBINPresident & CEO↗
- Jun 16, 26Sell$285KHOWARD W ROBINPresident & CEO↗
- Jun 15, 26Sell$336KJonathan ZalevskyChief R&D Officer↗
- May 19, 26Sell$29KHOWARD W ROBINPresident & CEO↗
- May 19, 26Sell$13KJonathan ZalevskyChief R&D Officer↗
- Feb 18, 26Sell$31KHOWARD W ROBINPresident & CEO↗
- Feb 18, 26Sell$13KJonathan ZalevskyChief R&D Officer↗
There are 18 more transactions in this stretch.
Stock compensation, tax and giftsshow the 10 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- Sep 23, 26Compensationamount n/aJeffrey Robert Ajer↗
- Sep 23, 26Compensationamount n/aDiana Brainard↗
- Sep 23, 26Compensationamount n/aROBERT CHESS↗
- Sep 23, 26Compensationamount n/aR SCOTT GREER↗
- Sep 23, 26Compensationamount n/aROY A WHITFIELD↗
- Dec 22, 25Compensationamount n/aHOWARD W ROBINPresident & CEO↗
- Dec 22, 25Compensationamount n/aJonathan ZalevskyChief R&D Officer↗
- Nov 21, 25Compensationamount n/aHOWARD W ROBINPresident & CEO↗
- Nov 21, 25Compensationamount n/aMark Andrew WilsonChief Legal Officer↗
- Nov 21, 25Compensationamount n/aJonathan ZalevskyChief R&D Officer↗
The full record holds 91 transactions and goes back to Sep 22, 22.
Its sector and its market
Nektar Therapeutics Inc. among Health Care companies
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- Wikipedia, read on Sep 3, 2026.
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