Impinj (PI +1.45%) specializes in solutions involving radio-frequency identification, or RFID. Impinj's RFID tags are used by retailers, manufacturers, and logistics companies to track inventory and assets.
The market for RFID products, including tags, readers, software, and services, was worth nearly $14.6 billion in 2025, according to Markets and Markets, and it's expected to grow at a CAGR of 8.5% through 2034.
After a rough period during the COVID-19 pandemic, partly due to retail store closures, Impinj has roared back. Sales soared from $190.3 million in 2021 to $361.1 million in 2025. The company is growing profits, too. In 2025, Impinj reported adjusted EBITDA of $69.6 million, up from $65.9 million in 2024.
Impinj estimates that just 0.5% of connectable items are connected today. In the long run, trillions of consumable objects could be tracked using RFID technology. Each RFID endpoint costs only pennies, making the technology economical for a wide array of uses.
The company is far from a sure thing as an investment, but it's one to watch in the IoT space.
5. Intel