Just been reflecting on something interesting about the market right now. Back in March, there were some genuinely solid opportunities for long-term investors that most people were sleeping on because of all the noise around hype stocks. Wanted to circle back on four companies that caught my attention then and still look compelling.

First up is Axon Enterprise. What's wild about this one is how it's transformed from just making TASERs and body cameras into this full AI-powered public safety platform. By end of 2025 they were hitting nearly $800M quarterly revenue, growing 39% year-over-year. They're targeting $6B in revenue by 2028 with 28% EBITDA margins - basically doubling the business in three years. The switching costs are real here; once police departments are locked into their ecosystem with Axon 911, Axon Vehicle Intelligence, and their AI report-writing tool, they're not switching. For investors looking at this space, the execution has matched the valuation.

Then there's Vertiv, which is basically the invisible backbone of every AI data center globally. They handle power and cooling for the infrastructure that's actually running these AI models. Their 2025 numbers were insane - $10.2B revenue up 28%, but more importantly they had an $15B backlog entering 2026. That's literally more than a full year of revenue sitting in their pipeline. They launched their OneCore platform specifically for high-density AI data centers and raised $2.1B to fund expansion. For investors in infrastructure plays, this is the kind of company that can't be disrupted by software alone.

TransMedics is doing something completely different but equally interesting. They've basically built a monopoly around organ transportation with their Organ Care System - keeping donor organs warm and functional instead of the old ice-cooler method. They're running their own 22-aircraft fleet and handling logistics for this entire market. By 2025 they were doing over 5,100 transplants and OCS Liver alone accounted for 36% of all U.S. liver transplants. Revenue hit $605M up 37%, and they're guiding for $727M to $757M in 2026. This is a business with zero real competitors and a moral imperative pushing adoption. Investors should appreciate that this isn't just profitable - it's literally saving lives.

Last one is Fair Isaac. This is the credit score company. Like, THE credit score company. You hear FICO scores mentioned everywhere - mortgages, auto loans, credit cards. Their pricing power is almost absurd because there's basically no alternative. 2025 revenue was $1.99B up 15.9%, but the real number that matters is their 32.8% net profit margin and Q4 operating margin of 45.7%. Their FICO Score 10T is more predictive and incorporates trended data, which should drive incremental licensing revenue for years. The stock pulled back about 25% year-to-date, which honestly created a rare entry point for investors looking at a near-monopoly with expanding margins. They also announced a $1.5B buyback, which signals management confidence.

What ties these four together isn't that they're flashy. None of them are hype plays. They're the actual infrastructure and systems that run critical parts of our economy - public safety, data centers, organ transplants, and credit decisions. Real revenue, double-digit growth, and market positions that aren't going away. That's the kind of foundation investors should be building on.