Stephen N. Landsman serves as Executive at Nalco Holding CO, where they oversee executive responsibilities. Since joining the company, Stephen N. Landsman has executed 19 insider transactions totaling $345.3K, demonstrating a bullish approach to their equity position. Their most recent transaction on Dec 12, 2025 involved purchasing 3,100 shares valued at $196.8K.
Stephen N. Landsman currently holds 15,100 shares of Nalco Holding CO (NLC), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Stephen N. Landsman has been a net buyer of NLC stock. They have purchased $345.3K and sold $0 worth of shares.
Stephen N. Landsman's most recent insider trade was on Dec 12, 2025, when they purchased 3,100 shares at $63.48 per share.
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| $32.36 |
| Discretionary |
| Mar 5, 2017 | UNVR | $0 | Option Exercise | 13,333 | $N/A | Discretionary |
| Jun 23, 2015 | UNVR | $110.0K | Purchase | 5,000 | $22.00 | Discretionary |
| Dec 1, 2011 | NLC | $0 | Award | 4,631 | $N/A | Discretionary |
| Dec 1, 2011 | NLC | $0 | Award | 2,324 | $N/A | Discretionary |
| Dec 1, 2011 | NLC | $0 | Award | 2,668 | $N/A | Discretionary |
| Dec 1, 2011 | NLC | $0 | Disposition | 201,461 | $N/A | Discretionary |
| Feb 11, 2011 | NLC | $0 | Award | 2,324 | $N/A | Discretionary |
| Feb 9, 2010 | NLC | $0 | Award | 2,668 | $N/A | Discretionary |
| Feb 12, 2009 | NLC | $0 | Award | 4,631 | $N/A | Discretionary |
| Feb 5, 2009 | NLC | $0 | Exercise | 30,985 | $N/A | Discretionary |
| Sep 26, 2008 | NLC | $21.2K | Purchase | 1,100 | $19.23 | Discretionary |
| Sep 26, 2008 | NLC | $15.4K | Purchase | 800 | $19.24 | Discretionary |
| Sep 26, 2008 | NLC | $1.9K | Purchase | 100 | $19.21 | Discretionary |
| Feb 11, 2008 | NLC | $0 | Exercise | 30,968 | $N/A | Discretionary |
| Mar 12, 2007 | NLC | $0 | Exercise | 61,952 | $N/A | Discretionary |
| Jan 23, 2006 | NLC | $0 | Exercise | 64,933 | $N/A | Discretionary |
| Jan 23, 2006 | NLC | $0 | Exercise | 64,933 | $N/A | Discretionary |