---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-021646"
form_type: "8-K"
ticker: "NRGV"
cik: "0001828536"
company_name: "Energy Vault Holdings, Inc."
filed_at: "2026-02-27T23:59:59+00:00"
generated_at: "2026-05-15T23:10:24.242054+00:00"
event_type: "debt"
sentiment: "positive"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Energy Vault issues additional $10M of 5.25% convertibles; repays $45M Yorkville debt

## Summary
- Initial purchasers exercised option to buy $10M in additional 5.250% Convertible Senior Notes due 2031 on same terms.
- Company entered additional capped call transactions with cap price initially $8.12/share to offset dilution from conversion.
- Net proceeds from the $140M initial note sale used to redeem $45M of senior unsecured convertible debentures held by YA II PN, Ltd.
- Total aggregate principal of convertible notes now $150M after the optional $10M addition.

## SEC filing metadata
- accession: 0001104659-26-021646
- form_type: 8-K
- ticker: NRGV
- cik: 0001828536
- company_name: Energy Vault Holdings, Inc.
- filed_at: 2026-02-27T23:59:59+00:00
- event_type: debt
- sentiment: positive
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 8.01, 2.03, 3.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1828536/000110465926021646/0001104659-26-021646-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1828536/000110465926021646/tm267515d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-021646
- JSON: https://secwatch.observer/filing/0001104659-26-021646.json
- Plain text: https://secwatch.observer/filing/0001104659-26-021646.txt

## Source-grounded claims
- claim_id: 42e5f3cab8e1f0e9d53df965eed5d42e876ee723
  claim: Energy Vault Holdings, Inc. incurred convertible notes of $10.0 million additional aggregate principal amount with Jefferies LLC, Cantor Fitzgerald & Co. and Citigroup Global Markets Inc. at 5.250% maturing due 2031.
  evidence_excerpt: On February 25, 2026, the Initial Purchasers notified the Company that they had elected to purchase $10.0 million in additional aggregate principal amount (the "Option Notes," and together with the Initial Notes, the "Notes") of the Company’s 5.250% Convertible Senior Notes due 2031 pursuant to the option granted to them under the Purchase Agreement. On February 27, 2026, the Company issued to the Initial Purchasers the Option Notes on the same terms as the Initial Notes.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1828536/000110465926021646/0001104659-26-021646-index.htm

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