Fluence Energy's 98% Weekly Surge Puts Smaller AI Power Names in Focus

Fluence Energy's 98.2% gain in the week ending May 8 — fueled by master supply agreements with two unnamed hyperscalers and a $5.6 billion project backlog — has drawn fresh attention to smaller-cap peers positioned along the AI data center power buildout. The rally cooled after the company priced a secondary offering of 20 million shares near $21.00, pulling the stock from $24.16 on May 8 to $20.77 by May 18 as dilution concerns set in. The move has traders scanning the sector for names that haven't run yet. Four trade below $20 — STEM, AXIA Energia, Uranium Energy Corp and Babcock & Wilcox — but none carries Fluence's combination of contracted institutional revenue and clean balance sheet. STEM manages 37.5 GW of solar assets through its PowerTrack grid software platform and posted its fourth consecutive quarter of positive adjusted EBITDA in Q1 2026, at $2.0 million, with non-GAAP gross margins reaching 52%. Annual recurring revenue is guided to $65 million to $70 million by year-end. The stock is down 39% year-to-date. The problem is the balance sheet: stockholders' equity of negative $265.88 million against $36.59 million in cash. The EBITDA inflection is real, but any stumble in cash burn likely requires dilutive capital — precisely the execution Fluence avoided by pricing off institutional demand. Brazil's AXIA Energia, the rebranded former Eletrobras, offers a different risk profile. The company operates 43,872 MW of 100% renewable capacity and reported Q1 2026 IFRS net revenue of R$12.71 billion, up 22.1%, with adjusted regulatory EBITDA surging 60% to R$8.60 billion and a swing to R$3.71 billion in net profit from a year-ago loss. Management plans R$12 billion to R$14 billion in annual investment through 2027 to serve growing Brazilian data center demand. Shares have gained 30.9% year-to-date and 112.4% over the past year, closing at $11.99. Net debt of R$46 billion at 1.8x LTM EBITDA is manageable, but uncontracted energy exposure of 26% to 43% in 2027 introduces revenue swings that Fluence's backlog model doesn't have. Uranium Energy Corp brought its Burke Hollow in-situ recovery mine online in April 2026 — the first new U.S. ISR uranium mine in more than a decade. The balance sheet is the cleanest of the group: $818 million in liquid assets, zero debt. Shares are at $15.16, up nearly 30% year-to-date and 171.7% over one year, with analyst consensus at Moderate Buy and a $19.17 average target. The exposure is real: nuclear baseload demand from AI data centers underpins the sector thesis. But UEC sells uranium unhedged and remains unprofitable, meaning revenue tracks spot price moves rather than signed contracts. Babcock & Wilcox secured a $2.4 billion design-build contract with Base Electron in 2026 covering 1.2 GW of natural gas-fired generation, pushing backlog up 470% to $2.8 billion. Management guided 2026 core adjusted EBITDA to $70 million to $85 million, roughly 80% above last year and excluding any data center upside. Three executives — CEO Kenneth Young, CFO Cameron Frymyer and General Counsel — made insider purchases in March 2026; Young bought 250,000 shares at $10.51. The stock has gained 129.3% year-to-date to $14.54. The risk is on the liability side: stockholders' equity of negative $131.5 million and a 6.50% note due for refinancing in 2026. The immediate test for the sector is whether Fluence's data-center momentum translates into comparable contract disclosures from its smaller peers. Fluence deferred roughly $80 million in shipments from Q2 to Q3 due to logistics issues in Vietnam and Spain; Q3 revenue realization will show whether the backlog is executable. For STEM, the question is whether EBITDA can stay positive without a dilutive equity raise. Any hyperscaler contract announcement from AXIA, UEC or Babcock & Wilcox would be the event that narrows the gap with Fluence's valuation.