---
schema_version: "secwatch.filing_event.v1"
accession: "0001289308-24-000013"
form_type: "8-K"
ticker: "ENS"
cik: "0001289308"
company_name: "EnerSys"
filed_at: "2024-05-02T23:59:59+00:00"
generated_at: "2026-06-03T00:02:26.515281+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# EnerSys to acquire Bren-Tronics for $208M to expand defense power solutions

## Summary
- All-cash acquisition of Bren-Tronics for $208M; purchase price ~8.7x trailing 12-month adjusted EBITDA.
- Bren-Tronics had ~$100M 2023 sales and 280 employees; specializes in portable lithium batteries for military.
- Expected to close in Q2 2024, immediately accretive to EPS; financed with cash on hand.
- Acquisition strengthens EnerSys' Specialty Aerospace & Defense business and lithium product roadmap.
- No external financing needed; integration with planned lithium gigafactory to support growth.

## SEC filing metadata
- accession: 0001289308-24-000013
- form_type: 8-K
- ticker: ENS
- cik: 0001289308
- company_name: EnerSys
- filed_at: 2024-05-02T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1289308/000128930824000013/0001289308-24-000013-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1289308/000128930824000013/ens-20240502.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001289308-24-000013
- JSON: https://secwatch.observer/filing/0001289308-24-000013.json
- Plain text: https://secwatch.observer/filing/0001289308-24-000013.txt

## Key facts
- Material Agreements
  EnerSys entered into Stock Purchase Agreement with the Sellers (as defined in the Agreement) valued at approximately $208 million (effective 2024-05-02).
  - Action: entry
  - Agreement: asset purchase
  - Counterparty: the Sellers (as defined in the Agreement)
  - Value: approximately $208 million
  - Effective: 2024-05-02
  source text: On May 2, 2024, EnerSys Advanced Systems Inc., a Delaware corporation (the “ Buyer ”) and a wholly-owned subsidiary of EnerSys, a Delaware corporation (the “ Company ”), entered into a Stock Purchase Agreement (the “ Agreement ”) with Michael Brenna 2015 Irrevocable Trust Dated 08/17/15, the Trust U/A Third (E) of the Leo. A. Brenna Revocable Trust Dated 02/07/2014 GST Exempt Trust F/B/O Michael Brenna, and the Trust U/A Third (E) of the Leo. A. Brenna Revocable Trust Dated 02/07/2014 Non GST Exempt Trust F/B/O Michael Brenna (each, a “ Seller ” and collectively, “ Sellers ”) and Barbara Dworkin, as Sellers’ representative. Pursuant to the terms of the Agreement, the Buyer will acquire 100% of the equity interests of Bren-Tronics, Inc., a New York corporation and a leader in the design, manufacturing, and marketing of advanced portable power solutions (the “ Acquired Company ”) from the Sellers, including both plots of real estate held by a related party (such stock and asset acquisiti
  evidence_url: https://www.sec.gov/Archives/edgar/data/1289308/000128930824000013/0001289308-24-000013-index.htm

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