Following is the meat of the filing from Princeton National Bancorp, Inc.: (I added the highlights to make it easier to read)
PART III – NARRATIVE
State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.
The 10Q filing will be delayed to allow for the time necessary to complete a comprehensive review of the Company’s bank subsidiary financial statements in light of the results of a regulatory examination being completed today. The timing of the examination prevents a timely review without unreasonable effort and expense.
You can see the entire filing here