---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-23-075473"
form_type: "8-K"
ticker: "NKTR"
cik: "0000906709"
company_name: "NEKTAR THERAPEUTICS"
filed_at: "2023-09-08T23:59:59+00:00"
generated_at: "2026-06-10T22:28:37.337079+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Nektar terminates collaboration agreement with Bristol-Myers Squibb for bempegaldesleukin

## Summary
- Parties entered letter agreement on Sept 6, 2023 to terminate the 2018 Strategic Collaboration Agreement.
- Collaboration covered development of bempegaldesleukin in combination with BMS's Opdivo (nivolumab).
- Global clinical development program for the combination was already ended in April 2022.
- Termination effective immediately per the letter agreement.

## SEC filing metadata
- accession: 0001213900-23-075473
- form_type: 8-K
- ticker: NKTR
- cik: 0000906709
- company_name: NEKTAR THERAPEUTICS
- filed_at: 2023-09-08T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/906709/000121390023075473/0001213900-23-075473-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/906709/000121390023075473/ea184617-8k_nektar.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-23-075473
- JSON: https://secwatch.observer/filing/0001213900-23-075473.json
- Plain text: https://secwatch.observer/filing/0001213900-23-075473.txt

## Key facts
- Material Agreements
  NEKTAR THERAPEUTICS terminated Strategic Collaboration Agreement with Bristol-Myers Squibb Company (effective 2023-09-06).
  - Action: termination
  - Agreement: collaboration
  - Counterparty: Bristol-Myers Squibb Company
  - Effective: 2023-09-06
  source text: the parties entered into a letter agreement (the “Letter Agreement”) to terminate the Strategic Collaboration Agreement.
  evidence_url: https://www.sec.gov/Archives/edgar/data/906709/000121390023075473/0001213900-23-075473-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.