Samsung, HTC and Motorola showed the biggest market share gains among major manufacturers in August, while Apple’s share slid slightly. New data from mobile ad network Chitika’s the research division, Chitika Insights, lays out August’s manufacturer market share based on traffic over the company’s network. According to its data, Apple maintained its overwhelming lead last month, though usage of the iPhone slid to 49.37% from 50.03% in July — the second biggest drop among all manufacturers last month. HTC held strong in the No. 2 position, inching up to 18.93%, and Motorola came in at No. 3 with 11.53%. At No. 4, Samsung showed the most growth between July and August, gaining 0.63% last month for a 9.68% share of the market. RIM’s BlackBerry phones lost the most ground in July, sliding 0.9% to a 2.47% share. An infographic outlining Chitika’s data follows below.