Shares of Power Solutions International (PSIX) suffered a steep decline Monday, plunging 17.5% to close at $62.45 on the Nasdaq, after the company reported a sharp drop in first-quarter profit and declined to issue formal full-year guidance. The stock continued to slide in after-hours trading, reaching $39.17, as investors reassessed the engine and power-systems manufacturer's prospects amid a challenging demand environment and rising costs tied to capacity expansion.
For the quarter ended March 31, Power Solutions International posted net income of $7.3 million, or $0.32 per diluted share, a 62% decline from $19.1 million, or $0.83 per share, in the same period a year earlier. Revenue slipped 5% to $128.6 million, falling short of the $161 million consensus estimate by more than $32 million. The company's non-GAAP earnings per share of $0.36 also missed expectations by $0.16, according to Seeking Alpha data.
Gross profit fell 27% to $29.4 million, and gross margin contracted sharply to 22.9% from 29.7% a year earlier, though it improved about 100 basis points from the fourth quarter of 2025. The margin compression reflects higher production costs as the company scales up its Wisconsin manufacturing capacity and contends with a less favorable product mix.
CEO Dino Xykis described the quarter as "below the strong prior-year period," citing weaker oil and gas demand, timing of Power Systems shipments, and increased expenses from capacity expansion. However, he emphasized that data-center demand "remains solid," a key pillar of the bull case for PSIX. The company has positioned itself as a potential supplier of backup and prime power for data centers, but management noted that shipment schedules, customer timelines, and capacity constraints are slowing the conversion of orders into revenue.
Power Systems sales dropped $10.2 million, driven by sluggish oil and gas demand and choppy data-center orders, though higher industrial and transportation sales partially offset the decline. For the second quarter, management targets revenue roughly in line with the first quarter, with an anticipated pickup in the second half of the year as larger Power Systems orders enter production. The company did not provide formal full-year guidance, citing uncertainty around customer timing, manufacturing output, and supply-chain dynamics.
In a notable contrast to peers, Power Solutions International's slide stood out against other industrial-power stocks. Cummins (CMI) rose 3.4%, and Generac (GNRC) edged up 0.7% on Monday, both avoiding the sharp intraday drop that hit PSIX, according to Sherwood News. The underperformance underscores investor skepticism about the company's near-term trajectory and its ability to capitalize on data-center growth amid operational headwinds.
The company also faces legal overhang. Robbins Geller Rudman & Dowd on Monday reminded investors who purchased PSIX shares between May 8, 2025, and March 2, 2026, that they have until May 19 to seek lead-plaintiff status in a securities class action. The lawsuit alleges that the company overstated its readiness for data-center demand and understated costs related to manufacturing capacity. These remain allegations at this stage.
Power Solutions International, headquartered in Wood Dale, Illinois, manufactures emission-certified engines and power systems for industrial, power, and transportation applications, including standby and prime power, microgrids, oil and gas, and data centers. The company's ability to navigate capacity constraints, margin pressures, and legal risks while capturing data-center demand will be critical in the months ahead.
