---
schema_version: "secwatch.filing_event.v1"
accession: "0001539497-25-003036"
form_type: "8-K"
ticker: "NB"
cik: "0001512228"
company_name: "NIOCORP DEVELOPMENTS LTD"
filed_at: "2025-11-21T23:59:59+00:00"
generated_at: "2026-05-16T17:37:04.295308+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# NioCorp adopts six-month shareholder rights plan with 20% trigger

## Summary
- Rights plan effective Nov 21, 2025, expires May 21, 2026.
- Trigger: any person acquiring 20%+ of outstanding common shares without complying with permitted bid provisions.
- Permitted bid must be to all shareholders, open 105 days, require >50% independent shareholder tender.
- Upon Flip-in Event, holders (other than Acquiring Person) can buy additional shares at 50% discount.
- Plan not adopted in response to any specific takeover bid; company unaware of any pending bids.

## SEC filing metadata
- accession: 0001539497-25-003036
- form_type: 8-K
- ticker: NB
- cik: 0001512228
- company_name: NIOCORP DEVELOPMENTS LTD
- filed_at: 2025-11-21T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 3.03, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1512228/000153949725003036/0001539497-25-003036-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1512228/000153949725003036/n2574_x299-8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001539497-25-003036
- JSON: https://secwatch.observer/filing/0001539497-25-003036.json
- Plain text: https://secwatch.observer/filing/0001539497-25-003036.txt

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