Aaron, I have done a bit of work myself on Contact dividends in the past. It is no longer quite up to date but you may find some of my historic posts on the CEN thread gives you a start. I have been a Contact Energy shareholder since day 1. So I was able to calculate the rate of imputation from my own dividend statements.
Post 1590 titled 'The overoptimisation of imputation credits' is here.
https://www.sharetrader.co.nz/showth...end#post757386
That post shows the somewhat patchy imputation record since the FY2015 50c 'special dividend'. That special dividend cleared out imputation credits before Origin Energy departed from the share register. IIRC the interim and final dividends were all fully imputed before this.
There is a problem with using historical dividends to value Contact Energy though. In FY2018 Contact changed their dividend policy to pay out 100% of 'Operating Free Cashflow', up from 80% of 'Operating Free Cashflow'. That means that the historical dividend payout is not representative of what would have happened had the FY2018 onward dividend policy been in place. I did the exercise and worked out what the dividend would have been over the previous ten years, had the current dividend policy been in place. This work is from the same page, my post 1579 titled. "FY2018 Dividend Policy: Scenario Analysis (2018 Perspective)".
There is a section on the dividend in each annual report. However, I am not sure it lists the detailed imputation credit details that you asked about.
No, I think you have it right!
No need to do that. That first post I referenced should give you the imputation credit information that you require, up until EOFY2018 at least! HTH.
SNOOPY