It's not clear when the deal was done, but it's confirmed in Companies Office filings made in June. The sale price isn't clear, either - but it's sure to be in the millions of dollars.
A staffer at Hart's Rank Group office in Auckland says: "There will be no comment."
Reports from 1998 state the section's previous owner, Greenland Timber Industries Ltd, a Singaporean investment company, paid $500,000 for the .45-hectare plot.
Like all Closeburn owners, that includes a one-27th share in the station's 1000-hectare farm.
Greenland Timber's majority owner in the 1990s was Malaysian-based Thai tycoon Surin Upatkoon.
Forbes magazine lists his fortune at $US1b.
Surin's investments include telecoms and gaming companies.