Spire Inc. (NYSE:SR) shares tumbled 5.79% in pre-market trading on Friday following the release of its fiscal fourth-quarter earnings report that fell short of analyst expectations. The natural gas utility company's disappointing results and forward-looking guidance appear to have sparked a sell-off among investors.

For the quarter ended September 30, Spire reported an adjusted loss of $0.47 per share, which was wider than the analyst consensus estimate of a $0.42 loss. This represents a miss of 11.9% compared to expectations. The company's quarterly revenue also came in significantly below forecasts at $334.1 million, missing the analyst estimate of $422.09 million by 20.85%. Despite the disappointing figures, it's worth noting that the reported loss narrowed from $0.54 per share in the same quarter last year, and revenue increased 13.72% year-over-year.

Adding to investor concerns, Spire provided fiscal 2026 adjusted earnings guidance of $5.25 to $5.45 per share and fiscal 2027 guidance of $5.65 to $5.85 per share. While these figures represent growth, they may not have met the market's more optimistic expectations. The company also announced it has raised its 10-year capital investment target to $11.2 billion, which could be viewed as a double-edged sword – signaling confidence in long-term growth opportunities but also potential pressure on near-term financials. As investors digest this mixed bag of results and forward-looking statements, the pre-market plunge reflects their immediate reaction to the earnings disappointment and potentially conservative outlook.