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Fluence Energy FLNC stock chart showing decline after second guidance cut September 2026
Photo: StocksToTrade

Fluence Energy Stock Sinks 22% on Second Guidance Cut

StockTitan2 min read6 sources

Why is Fluence Energy stock down today?

Fluence Energy (FLNC) stock fell 22% to about $7 on Thursday after the battery-storage maker slashed its fiscal 2026 revenue target to $2.4 billion, citing production failures at its Houston manufacturing plant.

Key numbers

FY2026 Revenue Guidance$2.4Bdown $600M from prior $3.0B target
FY2026 Adj. EBITDA Loss-$200Mwidened from -$10M midpoint
Stock Move (Thu Sep 17)-22%from $9.05 close to ~$7
Houston Plant Output1 unit/dayvs 11-unit/day ramp target
YTD Stock Decline-61%52-week high was $33.51
Trading Volume (Sep 17)41.9x daily avgextreme selling vs normal session

What happened

Fluence Energy (FLNC) stock fell 22% to about $7 on Thursday after the battery-storage maker slashed its fiscal 2026 revenue target to $2.4 billion, citing production failures at its Houston manufacturing plant. Fluence builds large battery systems that store electricity from wind and solar farms for utilities and grid operators; its Houston contract facility managed just one unit a day rather than the eleven originally planned, hurt by broken welding-automation robots and workforce shortages. The full-year adjusted operating loss forecast also widened sharply, from roughly $10 million to $200 million, as missed project milestones drove about two-thirds of the additional shortfall. Barclays, Mizuho, and Piper Sandler simultaneously issued Underweight ratings with price targets between $6 and $10.

Why it matters

Fluence Energy is among the largest pure-play battery storage companies in the U.S., and its repeated shortfalls point to wider difficulties scaling up domestic manufacturing. The Houston failures show that building a U.S. battery factory fast is harder than planned — bad news for energy policy that needs cheap, local storage to back up renewables. The widening losses and fresh Underweight ratings also raise questions about Fluence's ability to fund operations without new outside investment.

Who this affects

Marketbearish
Medium impact
Energy storage stocks fell on broad sector contagion fears.
Companybearish
High impact
Shareholders face steep losses and rising liquidity risk.
Competitorsmixed
Low impact
Rivals Stem and Eos Energy gained as investors rotated.
Industrybearish
Medium impact
U.S. battery factory scale-up looks riskier and costlier.

Fluence Energy vs Stem, Eos Energy

Fluence EnergyFLNC:NASDAQ$1.4B-22%-61%$2.26B
StemSTEM:NYSE$45M+5.6%-69%$148M
Eos EnergyEOSE:NASDAQ$1.4B+1.1%-65%$214M

As of 2026-09-17

How we got here

  1. Q2 FY2026 earnings; full-year $3.0B revenue guidance reaffirmed.

  2. Q3 FY2026 results; first FY2026 guidance reduction on Houston delays.

  3. Second guidance cut: FY revenue to $2.4B; new COO Bernerd Da Santos named.

  4. Stock falls 22%; Barclays, Mizuho, Piper Sandler all issue Underweight.

What to watch

  • Houston plant hitting 11 units/day before fiscal year closes Sept 30.2026-09-30
  • Q4 FY2026 earnings for cash burn, liquidity, and FY2027 guidance.Q4 2026
  • Whether a third guidance cut precedes the Q4 earnings release.Q4 2026

Educational content only. Not investment advice.

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