It depends on what your matching terms are, but for me, no.
I get a 100% match for the first 3% I put in, then a 50% on the next 2% I put in. So, if I put in 6%, the company will match 4%. The trick is that I have to be contributing 6% (or more) to get the full 4% match. So, in my case if I have contributed $17,500 by the end of July, there is no way for me to continue getting the full 4% match the rest of the year because I cannot contribute the required 6%. The most I will have matched in this case would be on the additional $500 I put in. So, I am effectively leaving money on the table unless I time it out where I max out my contribution on my last paycheck of the year.
I also get 6% profit sharing, but that is paid regardless of contributions by me into the 401k.