Prime Highlights
- Kelso Group reported a strong rise in the value of its Filtronic stake, driven by a sharp increase in the company’s share price.
- Filtronic has seen strong growth supported by contracts with global aerospace, defence and space companies.
Key Facts
- Kelso Group is a UK-based investment firm that focuses on undervalued listed companies.
- Filtronic has increased revenue significantly in recent years and works in RF, microwave and space communication technologies.
Background
Kelso Group has disclosed a significant holding in Filtronic after a sharp rise in the company’s share price increased the value of its investment above the reporting threshold.
The investment firm said it bought 500,000 shares in Filtronic between December 2025 and February 2026 at an average price of 185 pence per share. By the end of April, the stock had closed at 296 pence, lifting the value of the position and delivering an estimated unrealized gain of around 60 percent.
Kelso Group, which focuses on investing in undervalued listed companies, said the performance reflects growing confidence in Filtronic’s business outlook and long-term growth potential.
Filtronic is a UK-based technology company that supplies radio frequency, microwave, and millimetre wave solutions. In recent years, it has shifted its focus toward fast-growing sectors such as space, aerospace, defence and telecom infrastructure.
The company has worked with some of the biggest names in the industry, signing contracts and partnerships with SpaceX, Airbus, Leonardo, the European Space Agency and QinetiQ, which has kept business moving and brought more attention to its technology.
Over the past three years, Filtronic’s revenue has more than tripled, helped by a steady rise in orders and the company’s move into new markets. Its manufacturing site in County Durham is expected to help the company produce more as demand picks up.
Kelso highlighted Filtronic’s strong technical capabilities, improving financial position and exposure to growing global technology markets as key reasons behind its investment view. The company also entered the period with a record order book, with most revenues already secured.
Kelso said it will continue to monitor its investment and engage with Filtronic as part of its strategy to support value creation across its portfolio.
