ETFs aren’t like a regular hedge fund or whatever, they aren’t investing with a strategy or intent. It’s a proxy and holds the shares in a trust on behalf of holders of ETF units. If you held shares of URA (and were a registered participant) you can actually extract ASN shares (along with the rest) out of the fund, it’s called redemption.
So you won’t see a sub holder notice for an ETF.
The ETF makes money charging fees for shares in and out of the fund by brokers, not from holding stocks. The returns and losses are born by the holders of the ETF share units, because it’s those holders that have the beneficial interest in the shares.
