chunk.php

<?php

$query = new \WP_Query(array(
  // ...
));

foreach ($query->chunk(4) as $chunk): ?>

<div class="row">
  <?php while ($chunk->have_posts()): $chunk->the_post(); ?>
  <div class="col-md-3 col-sm-12">
    <?php the_title(); ?>
  </div>
  <?php endwhile; ?>
</div>

<?php endforeach; ?>