Shares of Tata group companies Tata Motors, Tata Motors DVR, Tata Metaliks, Tata Power and Tinplate Company hit year highs on Thursday. While Tata Motors and DVR shares are riding high on strong sales of its premium brand vehicle JLR, Tata Metaliks and Tinplate gained on general optimism in the metals and mining sector. Analysts will keenly watch whether they will sustain the rally. Tata Steel is also close to its year high level.