I think only Sony has it worse.
For 2017 yes. The Studio Market Share /Box Office so far is:
1 Buena Vista (Disney) 24.2%
2 Universal 17.3%
3 Warner Bros. 15.9%
4 20th Century Fox 15.2%
5 Lionsgate 8.7%
6 Paramount 5.9%
7 Sony / Columbia 3.6%
But for the whole year of 2016 the market share was:
1 Buena Vista (Disney) 26.3%
2 Warner Bros. 16.7%
3 20th Century Fox 12.9%
4 Universal 12.4%
5 Sony / Columbia 8.0%
6 Paramount 7.7%
7 Lionsgate 5.8%
And the 2015 box office market share:
1 Universal 21.3%
2 Buena Vista (Disney) 19.8%
3 Warner Bros. 13.9%
4 20th Century Fox 11.3%
5 Sony / Columbia 8.4%
6 Paramount 5.9%
7 Lionsgate 5.9%
It goes on like this with 6th and even 7th places for Paramount. The last time Paramount was in the studio Top-5 was in 2011, but with the no.1 place! Viacom's execs should be thinking what the heck happened since then.