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Ultralife Stock Jumps 145% After EnerSys Buyout Deal

SEC / EnerSys2 min read6 sources

Why did Ultralife stock jump 145%?

Ultralife (ULBI) stock jumped 145% to $15.61 on Wednesday after EnerSys (ENS) agreed to buy the battery maker for $16 a share in cash, a $320 million deal including debt.

Key numbers

Offer price$16.00 cashvs $15.61 close
Ultralife (ULBI) 1-day move$15.61+145.4%
Deal value (incl. net debt)$320MClose expected Q1 2027
Premium to Oct 26 close166%151.6% vs last close, per [3]
Price vs earnings before interest, tax and more (EBITDA)11.1xper [3]
EnerSys (ENS) 1-day move$171.45-1.6% (premarket +2.3% per [2])

What happened

Ultralife (ULBI) stock jumped 145% to $15.61 on Wednesday after EnerSys (ENS) agreed to buy the battery maker for $16 a share in cash, a $320 million deal including debt. The $16 price is 166% above where Ultralife closed on October 26, before the news. EnerSys plans to make a direct offer to Ultralife's owners (a tender offer) and expects to finish the deal in early 2027. It also expects $15 million to $20 million in yearly cost savings within 18 months.

Why it matters

Ultralife (ULBI) shareholders are set to receive $16 a share in cash, far above the roughly $6 the stock traded at before the news. The deal shows a larger battery maker paying a high price for U.S.-based factories that supply batteries for drones, soldier equipment and munitions. Because the stock closed just below the offer, investors are betting the deal will go through, though it still needs approvals.

Who this affects

Marketneutral
Low impact
Defense-battery investors get a fresh takeover valuation marker.
Companybullish
High impact
Ultralife shareholders gain a large premium; approvals still pending.
Competitorsmixed
Low impact
Rivals face a larger EnerSys; Enovix rose 5.1%.
Industryneutral
Medium impact
Defense battery makers see consolidation and demand for U.S.-made supply.

Ultralife vs EnerSys, Enovix

UltralifeULBI$260M+145.4%+4.7%—
EnerSysENS$6.18B-1.6%+3.7%13x
EnovixENVX$753M+5.1%+34.9%—

As of 2026-10-28

How we got here

  1. Ultralife closes near $6.02, the unaffected price used for the 166% premium.

  2. Both boards approve the deal; EnerSys announces $16-a-share cash offer.

  3. Ultralife closes at $15.61, up 145.4%, on record trading volume.

What to watch

  • Tender offer must reach a majority of Ultralife shares and win regulatory approvals.Q1 2027
  • Gap between ULBI's $15.61 close and the $16 offer, about 2.5%.Q1 2027
  • EnerSys targets $15–20M yearly savings and higher adjusted earnings within 18 months of closing.Q3 2028

Educational content only. Not investment advice.

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