A company buyer that brings leverage (synergy) to the deal through increased revenues or decreased costs that result from the pooling of two companies' strengths.
Apple is a synergistic buyer of Beats headphones. By purchasing Beats, Apple can sell the headphones in its online store and in all retail Apple stores. As a result, the revenue of Beats would dramatically increase after it is purchased by Apple.
Synergies normally result in increased revenue or decreased costs. Buyers of companies share the amount of the synergies with sellers of a business based on the probability of receiving them. Increased revenues are riskier to a buyer and therefore share less of these synergies with sellers of a business than those resulting from a decrease in costs, which is less riskier.