Tech Founder Niall Crosby Leaves €16.5 Million Will After Helicopter Crash

Niall Crosby, founder of data-processing software company AG Grid, left a will valued at €16.5 million after his death in a helicopter accident in July 2024. His company, which provides a high-speed data grid for enterprise use, is widely considered a market leader and has clients including Fortune 500 companies such as Adobe and Microsoft. The net value of Crosby's estate was just above €11.5 million after taxation.

In July 2024, Niall Crosby, the founder of data-processing software company AG Grid, tragically passed away in a helicopter accident in Co Westmeath. The Probate Office has since revealed that Crosby left a will valued at €16.5 million. The net value of his estate stood at just above €11.5 million after taxation [1].

AG Grid, which provides a high-speed data grid for enterprise use, is widely considered a market leader. The company's product, similar to Microsoft’s Excel, is known for its speed and efficiency. Crosby's innovative spirit led him to found AG Grid after noticing a gap in the market for such a product. Following the success of the software, he left his work as a consultant with the Royal Bank of Scotland to lead AG Grid until his death [1].

Crosby's company has seen significant growth, with revenue of £17.9 million (€20.6 million) in 2023, according to documents published on Companies House. Software sales grew by 16% against the previous financial year, and pretax profits increased slightly from £6.5 million in 2022 to £6.6 million in 2023 [1]. The company is now led by John Masterson, a friend of Crosby and one of the original members of the AG Grid team.

AG Grid's success is reflected in its clientele, with more than 90% of Fortune 500 companies using its product. Notable clients include Adobe, Microsoft, PayPal, and IBM, among others [1]. The company's product, AG Charts Enterprise, launched in 2023, has further solidified its market position.

Crosby's legacy lives on through AG Grid, which continues to innovate and grow under Masterson's leadership. The company's success is a testament to Crosby's vision and the impact he had on the data processing industry.

References:
[1] https://www.irishtimes.com/business/2025/09/05/helicopter-crash-victim-and-tech-founder-niall-crosby-left-will-of-165-million/