Crux of the matter is around voting power.
Citicorp and nominee style entities don't hold the voting power, the beneficial holders behind the accounts do.
So simply....unless there is one or a handful of associated entities owning at least 5% of that Citicorp Nom total listed, which I consider personally highly unlikely, then you not going to get a sub notice.
Obviously other considerations re takeover thresholds etc and some links and an ASIC guide around same below for anyone thinking of takeovers etc and what they need disclose.
Personally this is all just jumping at shadows for mine but pls due your own investigations to satisfy yourselves.
Substantial holding notice
A person who obtains voting power in 5% or more of an ASX-listed company is required to publicly disclose that fact within 2 business days via the filing of a substantial holding notice. A person’s voting power consists of their own ‘relevant interest’ in shares plus the relevant interests of their associates. A further notice needs to be filed within 2 business days after each subsequent voting power change of 1 percentage point or more, and after the person ceases to have voting power of 5% or more.
The notice must attach all documents which contributed to the voting power the person obtained, or provide a written description of arrangements which are not in writing.
The key shareholding thresholds in an ASX-listed Australian company from a Corporations Act perspective are: ≥5% (obligation to file substantial holding notice), >10% (ability to block compulsory acquisition), >20% (takeovers threshold), >25% (ability to block scheme of arrangement and special...
content.allens.com.au
Shareholding thresholds
The key shareholding thresholds in an ASX-listed Australian company from a Corporations Act perspective are: ≥5% (obligation to file substantial holding notice), >10% (ability to block compulsory acquisition), >20% (takeovers threshold), >25% (ability to block scheme of arrangement and special resolution), >50% (ability to pass ordinary resolution), ≥75% (ability to pass special resolution) and ≥90% (entitlement to compulsory acquisition).
Below is a sample of other takeovers issues which commonly arise or need to be considered. This is by no means an exhaustive list.
The following table identifies the key shareholding thresholds in an ASX-listed company from a Corporations Act perspective.[1] For simplicity the table focuses on companies only (but the same principles apply to the acquisition of interests in listed managed investment schemes).
ASIC rules.
Sub notices, takeovers etc under RG 5.286 page 66.