$793 million is the oddest number in NRG Energy's latest filing. That's the company's inventory balance after the three months ended June 30, up 75.8% from a year earlier, while revenue rose 11% to $7.5 billion.
The reported results improved sharply. Operating income went from zero to $976 million, and net income swung from a $104 million loss to $506 million of profit. Diluted EPS moved from negative 62 cents to $2.31, though diluted shares also rose 8.2%.
Then the balance sheet adds a qualification. Cash fell 10% to $162 million, accounts receivable rose only 3.3%, and free-cash-flow margin declined 3 percentage points. NRG doesn't say why inventory grew so much faster than sales. The filing gives the result, not a detailed explanation of the inventory increase.
Part of the operating improvement reflected commodity hedge positions. NRG said a gain in operating costs and expenses reflected the reversal of losses on contracts that settled during the period, partly offset by lower values on open positions.
"The $108 million gain in operating costs and expenses from economic hedge positions was driven primarily by the reversal of previously recognized unrealized losses on contracts that settled during the period, partially offset by a decrease in the value of open positions in West/Other as a result of decreases in natural gas price and CAISO and Alberta power prices."
NRG, Form 10-Q, filed August 4, 2026
That is a $108 million component of the profit swing. It describes a gain tied to contracts settling and market prices, while the open positions moved the other way. It does not turn the revenue increase into a mirage, but it does make the income statement less self-explanatory.
NRG also describes why it can need liquidity even while reporting profit: collateral and the timing gap between buying energy and collecting retail revenue. Those requirements are relevant alongside lower cash and higher inventory.
"These liquidity requirements are primarily driven by: (i) margin and collateral posted with counterparties; (ii) margin and collateral required to participate in physical markets and commodity exchanges; (iii) timing of disbursements and receipts (e.g., buying energy before receiving retail revenues); and (iv) initial collateral for large structured transactions."
NRG, Form 10-Q, filed August 4, 2026
In plain English, cash is not just a rainy-day balance here. Some of it supports the machinery of trading and supplying power, including collateral and purchases made before customer receipts arrive. The filing's numbers show a profitable period alongside a heavier working-capital footprint.
That combination also sits against NRG's recent annual record. Revenue rose 9.4% in 2025, but operating margin was 6.1%, below the 8.7% recorded in 2024. The latest three months produced a 13.0% operating margin, but the period's hedge activity and the acquisition-related financing described by management leave more than one moving part in the comparison.
NRG's next quarterly report is the factual checkpoint for the inventory and cash balances, and for any updated explanation of the working-capital build. For now, the filing reports a profitable three-month period alongside much more inventory and less cash.
Source: NRG Energy's Form 10-Q filed August 4, 2026, covering the three months ended June 30, 2026.