Here are the five stocks with blizzard-like insider purchases this past week: 1. Dell ( DELL): Michael Dell purchased $100 million of Dell shares on Dec. 17 at $13.57. 2. Koss ( KOSS): Michael Koss purchased Koss shares around $5, which is about 10% less than the other directors paid in November. 3. Advanced Photonix ( API): A director of Advanced Photonix paid around $1.45 for 1,000 shares. Other insiders paid $1.17 for API at the end of November. 4. Zoltek ( ZOLT): Insiders have been buying Zoltek shares since Dec. 7. The stock price took off 15% since. The latest insider purchase was at $10.14. ZOLT's closing price is $11.38. This is one of those cases in which one should be acting quickly, right after the insider purchase is ideal. Insider Monkey provides free real-time insider trading data. 5. Tucows ( TCX): An officer, a director, and a large shareholder of Tucows bought this stock at 70 cents to 78 cents. This is also a very illiquid stock, and we will be staying away from this one. This article was originally published at Insider Monkey.