Labour also booked a donation, of $100,000 from Islay Little.
Act has not had April donations published, but the party declared nearly $1m at the end of March.
This puts Act in the lead when it comes to cumulative donations from large donors in 2023, with $975,000. National trails with $162,070, followed by Labour on $150,000 and NZ First on $116,162.
The Greens have declared only Mills’ donation, giving the party $50,000 – just ahead of fringe party DemocracyNZ, which has declared $20,000.
National and Act have been enjoying a donations windfall since the last election, with National booking $2.3 million in 2022 and Act $1.1m.
The smaller parties have used these figures to appeal to their own voters for support.
On Wednesday night Green Party co-leader James Shaw appealed to Green supporters in an email citing the large donations to Act and National, saying: “Their rich mates are looking after them – and you can bet they’ll look after their rich mates if they get into government.
“Unlike other parties, we refuse to rely on dodgy backroom deals with industry lobbyists. We don’t and won’t rely on big donations from the dirtiest polluters in return for letting them off the hook”.