Fluence Energy Shares Plunge After Second Guidance Cut of the Year

Fluence Energy, the battery storage manufacturer backed by founding shareholders AES Corporation and Siemens, slashed its fiscal 2026 financial outlook for the second time in six weeks on Tuesday evening, wiping out more than half the company's remaining market value and prompting a wave of Wall Street downgrades. The Arlington, Virginia-based company said persistent delays at a contract manufacturing plant in Houston, not a slowdown in demand, were behind the reversal.

In a filing lodged with the Securities and Exchange Commission, Fluence said it now expects fiscal 2026 revenue of approximately $2.4 billion, down from a prior midpoint of $3.0 billion, and an adjusted EBITDA loss of about $200 million, compared with a previously guided loss of roughly $10 million. Shares fell as much as 22% in after-hours trading following the announcement and continued sliding into Wednesday's session, closing near $9.05, down 54% for the year and about 73% below their 52-week high of $33.51.

The numbers

The magnitude of the revision startled analysts who had already absorbed one guidance cut this summer. Fluence's fiscal year began with revenue guidance of $3.2 billion to $3.6 billion and adjusted EBITDA of $40 million to $60 million. That was trimmed in an August 5 third-quarter earnings release to $2.9 billion to $3.1 billion in revenue and an EBITDA range of a $30 million loss to a $10 million profit, after the company said roughly $400 million of project deliveries had slipped into fiscal 2027. Tuesday's update effectively halves the company's implied fourth-quarter revenue expectations and turns a modest projected profit for the year into a nine-figure loss.

Wall Street's response was swift. Goldman Sachs cut Fluence to Neutral from Buy with a $9 price target. Baird downgraded the stock to Underperform from Neutral, cutting its target to $3 from $10 — a roughly 70% reduction. BMO Capital Markets lowered its target to $7 from $14 while keeping a Market Perform rating, and Canaccord Genuity kept a Buy rating but cut its target to $15 from $24. UBS was an outlier, upgrading Fluence to Neutral from Sell on the view that the reset guidance may mark a trough in near-term expectations.

How the company got here

Fluence builds and integrates lithium-ion battery systems used by utilities and grid operators to store electricity from wind and solar generation and discharge it on demand. The company, which describes itself as a Siemens and AES company and went public in 2021, has built what it describes as the world's largest deployed energy storage fleet, with projects across nearly 50 markets. Its stock has nonetheless been one of the worst performers in the clean-energy sector this year as it has struggled to bring a Houston-area contract manufacturing facility up to planned output.

Chief executive Julian Nebreda said the shortfall was concentrated in the company's domestic supply chain rather than in customer orders. "Demand for our products has remained strong both domestically and internationally, and our international supply chain has continued to work well," Nebreda said in the SEC filing. "However, we continue to experience delays in the ramp up of our contract manufacturing facility in Houston, which is the primary reason we are now lowering our fiscal year 2026 financial guidance."

"Our key priority is converting our backlog into revenue and cash, and optimizing working capital," said chief financial officer Ahmed Pasha, adding that the company's objective is to generate neutral to positive operating cash flow to support its backlog without raising external capital.

Fluence said its contract manufacturer is implementing corrective measures and has increased daily production levels at the Houston site, and that the company is restructuring its operations and supply-chain functions in response.

Who is affected

The guidance cut lands alongside a leadership shake-up that tightens the influence of AES, Fluence's largest shareholder, over day-to-day operations. In a separate disclosure filed the same day, Fluence named Bernerd Da Santos, a longtime AES executive who most recently chaired the AES Clean Energy board, as executive vice president and chief operating officer, effective September 15. Da Santos will oversee customer success, product, supply chain, manufacturing and enterprise operations. AES Grid Stability also exercised shareholder nomination rights to place Stephen Coughlin, AES's executive vice president and chief financial officer and a former founding chief executive of Fluence, on the company's board.

Investors bore the most immediate impact, with hundreds of millions of dollars in market value erased in a single trading session. Employees and contractors tied to the Houston facility face continued uncertainty over production timelines, while utility and grid-operator customers awaiting deliveries — the backlog executives repeatedly cited as their priority to convert into cash — are watching whether the revised targets hold. Rival and adjacent clean-energy names, including other battery storage and grid-technology stocks, also traded lower in sympathy as investors reassessed supply-chain risk across the sector.

What happens next

Fluence executives sought to draw a line under the reset by tying it to a broader operational overhaul rather than a demand problem. Management said it is targeting neutral-to-positive operating cash flow in fiscal 2027 without relying on external capital, and it plans to lay out a detailed fiscal 2027 business plan when it reports full fiscal 2026 results. The company held an investor conference call Tuesday evening to walk through the revision in detail, with a replay made available the following day.

Analysts remain split on whether the reset marks a floor. UBS's move to raise its rating reflected a view that expectations have now been reduced enough to limit further downside, while Baird's steep target cut signaled skepticism that manufacturing delays will resolve quickly. With this the second guidance cut of the fiscal year, investors are likely to scrutinize Fluence's fourth-quarter and full-year results, expected in the coming months, for evidence that the Houston ramp-up — and the new operating leadership installed by AES — can stabilize production before further backlog conversion slips.