Power Solutions International Stock Rallies 140% as Fund Manager Takes Strategic Exit

Gagnon Securities LLC has completely divested from Power Solutions International, liquidating its entire 64,770-share position during the fourth quarter. According to a February 12, 2026, SEC filing, the position was valued at approximately $6.36 million at the time of sale. This move came after the company’s exceptional operational performance, where shares surged to $92.72 per share—a remarkable 140% appreciation over the preceding twelve months, far outpacing the S&P 500’s modest 12% return in the same timeframe.

Why the Fund Manager Pulled Out

The Gagnon Securities exit represents a textbook example of profit-taking discipline. Power Solutions International delivered extraordinary results in its third quarter, reporting $203.8 million in revenue—representing a robust 62% year-over-year surge. The company’s bottom line proved equally impressive, with net income climbing to $27.6 million, up 59% from the prior year, translating to diluted earnings per share of $1.20.

For the nine-month period through 2025, the company posted net income of $97.9 million, more than doubling its year-ago figure. Management attributed much of this momentum to escalating data center demand, which is projected to drive a 45% revenue expansion for the full fiscal year. When a smaller industrial player has already doubled in value and continues posting record results, trimming or fully divesting can reflect prudent risk management rather than pessimism about future prospects.

The Trade-Off Between Growth and Margins

However, beneath the headline growth figures lies a concerning detail: gross margin deteriorated to 23.9% as Power Solutions International aggressively ramped production to meet demand. This compression reveals an uncomfortable truth—rapid expansion often introduces operational complexity and margin pressure. The company is scaling quickly, but at what cost to profitability?

Within Gagnon Securities’ broader portfolio, capital appears to be consolidating into alternative positions. The fund’s top five holdings after the fourth-quarter filing included:

• CDNA at $33.44 million (6.9% of assets)
• WGS valued at $32.97 million (6.8% of assets)
• AL representing $31.92 million (6.6% of assets)
• ENSG at $31.45 million (6.5% of assets)
• AMRC comprising $24.40 million (5.0% of assets)

This rebalancing suggests the fund manager is diversifying into positions it considers better positioned for the current market environment.

What Investors Should Consider

Building wealth through disciplined exit strategies—much like how financial professionals structure long-term net worth accumulation—requires recognizing when to protect gains. After a stock appreciates 140% in twelve months, harvesting profits becomes strategically sound, particularly when operational metrics reveal hidden pressures.

Power Solutions International’s fundamentals remain compelling if data center demand persists and margins recover. The company’s revenue trajectory and net income acceleration demonstrate genuine competitive strength in supplying alternative-fueled and conventional engines for industrial, energy, and transportation applications worldwide. Its position supplying original equipment manufacturers with complete power systems and custom-engineered solutions has proven lucrative.

Yet the margin compression cannot be ignored. If the company successfully stabilizes gross margins while maintaining sales growth momentum, long-term investors could continue witnessing appreciation. Conversely, if margin pressure proves persistent, the stock’s recent valuation may prove difficult to sustain.

The Motley Fool Stock Advisor team recently identified what they consider the ten best stocks for investors to buy presently—and Power Solutions International did not make the cut. Historical precedent suggests this matters: when Netflix appeared on their list in December 2004, a $1,000 investment would have grown to $414,554 by February 2026. Similarly, an April 2005 Nvidia recommendation would have delivered $1,120,663 on the same $1,000 investment.

Ultimately, the Gagnon Securities exit exemplifies a professional approach to portfolio management: recognize excellence, capture gains, and redeploy capital into other compelling opportunities. Whether Power Solutions International proves to be a “one that got away” for the fund, or a prudent trim before potential headwinds, only time will reveal.