WisdomTree Europe Defence UCITS ETF - EUR Acc (WDEF.L) is an exchange-traded fund that seeks to track the WisdomTree Europe Defence UCITS Index, providing targeted exposure to European companies involved in the defence sector, including military equipment production, aerospace, and defence technology; it employs physical full replication and accumulates dividends for reinvestment. The ETF, domiciled in Ireland as part of WisdomTree Issuer ICAV headquartered at 3 Dublin Landings, North Wall Quay, Dublin 1, was launched on 4 March 2025 and lists on exchanges such as the London Stock Exchange, Börse Xetra, and Borsa Italiana with a total expense ratio of 0.40%. It focuses on developed and emerging European markets signatory to the Non-Proliferation Treaty, selecting at least 20 stocks based on defence revenue exposure, free-float market capitalization, and liquidity criteria while excluding firms involved in controversial weapons like cluster munitions or violating UN Global Compact principles; top holdings emphasize large-cap industrials (89.62% allocation) from countries including the UK, France, Germany, Italy, and Sweden. In recent developments, the ETF rapidly surpassed USD 1 billion in assets under management within its first month of trading in April 2025 and exceeded USD 3 billion by late June 2025, reflecting strong investor demand amid Europe's defence rearmament cycle. Complementing this growth, WisdomTree launched a U.S.-domiciled counterpart, the WisdomTree Europe Defense Fund (WDEF), in July 2025, along with new Global Defense Fund (WDGF) and Asia Defense Fund (WDAF) ETFs in September 2025, expanding its thematic defence offerings while maintaining UCITS compliance and ESG screens for the European vehicle.