---
schema_version: "secwatch.filing_event.v1"
accession: "0001828536-25-000213"
form_type: "8-K"
ticker: "NRGV"
cik: "0001828536"
company_name: "Energy Vault Holdings, Inc."
filed_at: "2025-12-19T23:59:59+00:00"
generated_at: "2026-05-16T12:37:37.072041+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Energy Vault closes $20M additional convertible debenture issuance to YA II PN

## Summary
- Issued $20M aggregate principal of senior unsecured convertible debentures at 97% of par.
- Debentures carry 7% annual interest (18% on default) and mature March 22, 2027.
- Conversion price fixed at $7.53/share (150% of Dec 12 VWAP); amortization installments start Jan 2026.
- Proceeds to fund working capital, energy storage project development, and construction.
- This is second tranche following $30M initial closing on Sep 22, 2025, for total $50M.

## SEC filing metadata
- accession: 0001828536-25-000213
- form_type: 8-K
- ticker: NRGV
- cik: 0001828536
- company_name: Energy Vault Holdings, Inc.
- filed_at: 2025-12-19T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 2.03, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1828536/000182853625000213/0001828536-25-000213-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1828536/000182853625000213/nrgv-20251216.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001828536-25-000213
- JSON: https://secwatch.observer/filing/0001828536-25-000213.json
- Plain text: https://secwatch.observer/filing/0001828536-25-000213.txt

## Key facts
- Debt Financings
  Energy Vault Holdings, Inc. incurred convertible notes of $20.0 million with YA II PN, Ltd. at 7% annual interest rate maturing March 22, 2027.
  - Instrument: convertible notes
  - Principal: $20.0 million
  - Counterparty: YA II PN, Ltd.
  - Rate: 7% annual interest rate
  - Maturity: March 22, 2027
  - Event: incurrence
  source text: On December 16, 2025, the Company issued additional Debentures in the aggregate principal amount of $20.0 million to the Investor (the “Subsequent Closing”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1828536/000182853625000213/0001828536-25-000213-index.htm

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