In one aspect, a share data allocation (SDA) computing device is provided. The SDA computing device includes at least one processor in communication with a database. The at least one processor is configured to receive direct-share participant (DSP) request data indicating an amount each DSP is willing to invest and receive interest-based participant (IBP) request data indicating an amount each IBP is willing to invest. The at least one processor is also configured to apply a first mapping algorithm to the DSP request data and apply a second mapping algorithm to the IBP request data. The at least one processor is further configured to calculate a preliminary allocation of a total amount of assets among the DSPs and the IBPs according to results of an apportionment, and direct allocation of the total amount of assets among the DSPs and the IBPs according to results of a join operator.