Investment Management Co Nierenberg serves as Executive at NATUS MEDICAL INC, where they oversee executive responsibilities. Since joining the company, Investment Management Co Nierenberg has executed 89 insider transactions totaling $34.6M, demonstrating a bullish approach to their equity position. Their most recent transaction on May 7, 2008 involved purchasing 118,725 shares valued at $362.1K.
Investment Management Co Nierenberg currently holds 110,361 shares of NATUS MEDICAL INC (BABY), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Investment Management Co Nierenberg has been a net buyer of BABY stock. They have purchased $33.7M and sold $975.7K worth of shares.
Investment Management Co Nierenberg's most recent insider trade was on May 7, 2008, when they purchased 118,725 shares at $3.05 per share.
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| $3.05 |
| Discretionary |
| May 7, 2008 | AACC | $56.9K | Purchase | 4,760 | $11.96 | Discretionary |
| May 7, 2008 | AACC | $331.6K | Purchase | 27,725 | $11.96 | Discretionary |
| May 7, 2008 | AACC | $75.2K | Purchase | 6,288 | $11.96 | Discretionary |
| May 7, 2008 | AACC | $20.4K | Purchase | 1,708 | $11.96 | Discretionary |
| Jan 15, 2008 | RSYS | $8.6K | Purchase | 701 | $12.25 | Discretionary |
| Jan 11, 2008 | RSYS | $7.3K | Purchase | 600 | $12.20 | Discretionary |
| Jan 3, 2008 | RSYS | $222.0K | Purchase | 17,000 | $13.06 | Discretionary |
| Jan 3, 2008 | RSYS | $15.8K | Purchase | 1,207 | $13.06 | Discretionary |
| Jan 2, 2008 | RSYS | $2.6K | Purchase | 200 | $13.10 | Discretionary |
| Jan 2, 2008 | RSYS | $17.0K | Purchase | 1,300 | $13.10 | Discretionary |
| Dec 31, 2007 | RSYS | $239.4K | Purchase | 18,000 | $13.30 | Discretionary |
| Dec 31, 2007 | RSYS | $5.3K | Purchase | 398 | $13.30 | Discretionary |
| Nov 26, 2007 | ESIO | $141.2K | Purchase | 7,500 | $18.83 | Discretionary |
| Nov 21, 2007 | ESIO | $19.5K | Purchase | 1,000 | $19.49 | Discretionary |
| Nov 14, 2007 | MDTH | $1.8M | Purchase | 80,200 | $22.47 | Discretionary |
| Nov 14, 2007 | MDTH | $6.7M | Purchase | 296,250 | $22.47 | Discretionary |
| Nov 14, 2007 | MDTH | $359.5K | Purchase | 16,000 | $22.47 | Discretionary |
| Nov 14, 2007 | MDTH | $1.3M | Purchase | 57,550 | $22.47 | Discretionary |
| Nov 13, 2007 | MDTH | $88.1K | Purchase | 3,350 | $26.30 | Discretionary |
| Nov 13, 2007 | MDTH | $355.1K | Purchase | 13,500 | $26.30 | Discretionary |
| Nov 13, 2007 | MDTH | $1.4M | Purchase | 53,400 | $26.30 | Discretionary |
| Nov 9, 2007 | ESIO | $672.6K | Purchase | 34,546 | $19.47 | Discretionary |
| Nov 8, 2007 | ESIO | $142.2K | Purchase | 7,300 | $19.48 | Discretionary |
| Nov 1, 2007 | ESIO | $629.3K | Purchase | 31,200 | $20.17 | Discretionary |
| Sep 25, 2007 | BABY | $112.3K | Purchase | 8,000 | $14.04 | Discretionary |
| Sep 24, 2007 | BABY | $400.0K | Purchase | 28,431 | $14.07 | Discretionary |
| Sep 5, 2007 | RSYS | $2.2K | Purchase | 200 | $10.80 | Discretionary |
| Aug 29, 2007 | RSYS | $130.1K | Purchase | 12,166 | $10.69 | Discretionary |