Earn 84% in One Year! Star Fund Manager Reveals: Avoid the "Magnificent Seven" US Stocks and Discover "Hidden Quality Compound Interest Stocks"

The Needham Aggressive Growth Fund (NEAGX), helmed by John Barr, delivered a remarkable performance in the past year.

Since April last year, this small-cap focused fund has risen 84% cumulatively, not only far outpacing the 30% return for the S&P 500 in the same period but also significantly outperforming the 43% gain of the Russell 2000 small-cap index.

Even more noteworthy is that the fund achieved such outstanding results not by relying on the market’s well-known hot stocks. According to Morningstar data, NEAGX beat 99% of its peers over the last five years, while most of the companies Barr holds aren’t even widely recognized names.

This is exactly the type of investment field Barr prefers the most.

In an interview with Business Insider, he stated, “There’s less noise. I think the ‘Mag 7’ attracts too much attention, to the point that some really excellent smaller companies don’t get covered and aren’t sufficiently noticed.”

As of December 31, 2025, the fund’s top ten holdings and their weights are:

- nLIGHT (4.88%)

- Vicor (4.39%)

- Arteris (3.49%)

- Vertiv (3.45%)

- PDF Solutions (3.41%)

- ThredUp (3.17%)

- OilDri (2.54%)

- Genius Sports (2.37%)

- Lincoln Educational Service (2.22%)

- Hammond Power Solutions (2.14%)

“Hidden Quality Compounders”: Barr’s Core Investment Logic

To some extent, Barr’s investment approach is essentially built on “low profile”—not only are the companies themselves relatively obscure, but more importantly, they often possess new business lines that the market has yet to fully understand.

Barr calls these types of companies “hidden quality compounders” and uses three core criteria to select targets.

First, “hidden” means that the company already has a solid business model but is also investing to cultivate a new source of revenue whose potential hasn’t been truly recognized by the market. Since the company is still in the investment phase, the new business often drags on short-term cash flow, making the stock look unattractive before it takes off.

Barr explains, “The company’s overall financials are often around break-even, so it’s not appealing to value investors, nor is it sexy enough for growth investors. But what we consider is in one year, two years, or even five years, when will this new business start to contribute profits—and we’re willing to hold for up to ten years on average.”

Second, he places great emphasis on the tenure and mindset of the management team. This means he prefers to invest in founder-led companies, or those where executives have served many years and clearly possess a long-term operational perspective.

Third, Barr assesses whether, if the new business ultimately fails, the company’s original core business is still strong enough to sustain profitability. If the answer is yes, then downside risk in such stocks is typically more limited.

Three Stocks Barr Especially Favors

Since taking over management of the fund in 2010, Barr has consistently adhered to this stock selection framework. He specifically highlighted three stocks in the portfolio that fit these criteria and are likely to continue outperforming the market over the next year.

1. nLIGHT: Benefiting from Rising Demand for Counter-Drone Technology

The first is laser equipment manufacturer nLIGHT (LASR). Barr argues that as government and military needs for defense technology continue to rise, the company stands to benefit since its laser products can be used to shoot down drones.

He notes that drone technology is advancing rapidly and the corresponding countermeasures must also keep pace, with lasers being a key area.

Barr says, “Drone technology is developing very quickly, and you have to find ways to deal with it—lasers are one of those ways. Over the past year, this field has really drawn a lot of market attention.”

The stock is up 808% in the past 12 months.

2. Vicor: AI Data Center Demand Drives Business Growth

The second is Vicor (VICR), which specializes in power conversion components. Barr points out that the company is currently benefiting from strong demand by large-scale AI cloud providers, who are using Vicor’s products in their data centers.

Barr says, “In recent months, and in recent quarters, what’s really been driving the company’s business growth are their new generation of products, which can operate alongside AI processors.”

In other words, Vicor’s growth is not just about its traditional power equipment business, but it has also tapped into the major trend of upgrading AI computing infrastructure.

3. Tetra: From Fracking Chemicals to Data Center Water Treatment

The third is Tetra (TTI). Originally known for producing fracking chemicals, one of its new business lines involves providing water treatment solutions in the Permian Basin, where new data centers are consuming large quantities of water.

Barr believes this business could become a new growth engine for the company in the future.

He said, “Data centers use a huge amount of water. If that water can be treated and reused, it’s a huge win for everyone. If this business model proves itself, Tetra would be in a very advantageous position.”

Overall, Barr’s success doesn’t come from simply betting on high-profile sectors, but from looking outside of the spotlight for companies with solid core businesses, long-term management, and new growth engines not yet fully priced by the market. At a time when large-cap tech stocks continue to capture the market’s attention, this strategy of “avoiding the noise and lying in wait in lesser-known areas” has instead helped him achieve remarkable excess returns over the past year.

For ordinary investors, Barr’s perspective also offers a valuable lesson: truly high-return opportunities are not always found in the most popular or most talked-about stocks. More often, they are hidden among those companies in niche sectors that are temporarily underappreciated by the market.