ITA manages $13.6 billion in assets under management
The iShares U.S. Aerospace & Defense ETF manages a massive $13.6 billion in assets under management.
The ARK Space & Defense Innovation ETF takes a smaller approach with ~$717.3 million in AUM.
The iShares fund tracks a market-cap-weighted index of domestic aerospace firms and is the significantly more affordable option for long-term holders, with an expense ratio of 0.38%.