The subsidiary is just The Brookfield Asset Management. All it did so was to widen its investor base.What subsidiary would that be?
And why would he lie about his involvement in the decision?
(he's not even the Liberal leader yet and you're already making excuses! Is that just practice for the future? Lol!!!)
Carney obviously believed he was taken out of context:

Carney says he should have been more ‘precise’ in answer on Brookfield move
At a leadership event in Oakville, Ont., the Liberal front-runner also skirted questions about proactively disclosing his finances beyond what is required by law

Yes, he should have been more precise about his response to that question.
However, the Conservative attack ads are also not accurate and are framed in a very dishonest manner.
The move of the HQ to New York was sanctioned on October 31st 2024. Yet, the Conservative ads lied about Carney instigating the move at the behest of Trump.
By the way, Carney now also has his Security Clearance. Why is Pee Pee avoiding it after being a MP for decades? What has he got to hide?
Of course you will defend him, no matter what!!