Mark Slezak serves as Executive at NANOSPHERE INC, where they oversee executive responsibilities. Since joining the company, Mark Slezak has executed 56 insider transactions totaling $13.9M, demonstrating a bullish approach to their equity position. Their most recent transaction on Feb 8, 2013 involved transacting 2,902,407 shares valued at $0.
Mark Slezak currently holds 5,006,136 shares of NANOSPHERE INC (NSPH), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Mark Slezak has been a net buyer of NSPH stock. They have purchased $13.9M and sold $0 worth of shares.
Mark Slezak's most recent insider trade was on Feb 8, 2013, when they sold 2,902,407 shares at $0.00 per share.
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| $N/A |
| Discretionary |
| Feb 8, 2013 | NSPH | $0 | Other | 2,274,096 | $N/A | Discretionary |
| Jul 19, 2012 | NSPH | $2.4M | Purchase | 1,000,000 | $2.40 | Discretionary |
| Jun 15, 2012 | NSPH | $471.0K | Purchase | 229,746 | $2.05 | Discretionary |
| Jun 14, 2012 | NSPH | $157.1K | Purchase | 79,329 | $1.98 | Discretionary |
| Jun 13, 2012 | NSPH | $78.0K | Purchase | 40,000 | $1.95 | Discretionary |
| Jun 12, 2012 | NSPH | $19.8K | Purchase | 10,000 | $1.98 | Discretionary |
| Jun 11, 2012 | NSPH | $9.8K | Purchase | 5,000 | $1.95 | Discretionary |
| Jun 8, 2012 | NSPH | $39.2K | Purchase | 20,000 | $1.96 | Discretionary |
| Jun 7, 2012 | NSPH | $24.9K | Purchase | 13,116 | $1.90 | Discretionary |
| Jun 6, 2012 | NSPH | $27.8K | Purchase | 15,000 | $1.85 | Discretionary |
| Jun 5, 2012 | NSPH | $555.6K | Purchase | 317,500 | $1.75 | Discretionary |
| Jun 4, 2012 | NSPH | $43.8K | Purchase | 25,000 | $1.75 | Discretionary |
| Jun 1, 2012 | NSPH | $152.0K | Purchase | 88,900 | $1.71 | Discretionary |
| May 31, 2012 | NSPH | $50.7K | Purchase | 30,000 | $1.69 | Discretionary |
| May 29, 2012 | NSPH | $16.9K | Purchase | 10,000 | $1.69 | Discretionary |
| May 25, 2012 | NSPH | $9.4K | Purchase | 5,505 | $1.70 | Discretionary |
| May 24, 2012 | NSPH | $59.9K | Purchase | 35,000 | $1.71 | Discretionary |
| Oct 14, 2011 | NSPH | $313.8K | Purchase | 285,235 | $1.10 | Discretionary |
| Jul 8, 2011 | NSPH | $130.2K | Purchase | 70,000 | $1.86 | Discretionary |
| Jul 7, 2011 | NSPH | $83.7K | Purchase | 45,000 | $1.86 | Discretionary |
| Jun 28, 2011 | NSPH | $170.0K | Purchase | 100,000 | $1.70 | Discretionary |
| Jun 27, 2011 | NSPH | $246.0K | Purchase | 150,000 | $1.64 | Discretionary |
| Jun 24, 2011 | NSPH | $211.9K | Purchase | 135,000 | $1.57 | Discretionary |
| May 10, 2011 | NSPH | $3.0M | Purchase | 1,350,000 | $2.20 | Discretionary |
| May 10, 2011 | NSPH | $3.0M | Purchase | 1,350,000 | $2.20 | Discretionary |
| May 22, 2009 | NSPH | $1.5M | Purchase | 504,500 | $3.05 | Discretionary |
| Mar 16, 2009 | NSPH | $436.5K | Purchase | 87,658 | $4.98 | Discretionary |
| Mar 13, 2009 | NSPH | $66.5K | Purchase | 14,398 | $4.62 | Discretionary |