On a combined basis this resulted in a Rubicon valuation, based on the sum-of-the-parts approach and adjusting for 4c of net debt, of 86c to 90c a share, indicating significant upside compared with the current 37c level, the researchers said.
Thorrington and Johnston said both of Rubicon's investment companies had made good progress in 2013 and had good prospects for 2014.
"Having gained market share and reduced its cost base during this period, Tenon is rebuilding profitability as market conditions improve.
"ArborGen has strong positions in the southeast US and Australasian forestry seedling markets and is in the process of increasing the penetration of its advanced genetics variants where it is the leading integrated global player."
Arborgen had also announced plans to float on a international stock exchange which "would enable the company to attract new funds to accelerate business development".