AlphaResearch - 10k, 10q, 8k

When it comes to search through multiple SEC filings document, Edgar systems is usually insufficient. AlphaResearch is for sure the preferred option. Using state-of-the-art technology, they allow you to pick up hidden and hard-to-find details in multiple documents at the same time. Besides US stocks, they also cover Canada and Europe stock. Here are a few examples so that you can experience the power of their search functionality:

SEC filings

10 k

10q

8 k

13f filings

sec form 4

That is why AlphaResearch is recommended as one of the best stock research websites by Columbia University student.