SIAL Insider Trading
SIAL | Market Equity
Comprehensive Trading Performance Summary
The investment history of corporate insiders at SIAL provides a unique lens into the internal conviction of the company's leadership. By analyzing SEC Form 4 filings, investors can track how directors and officers are allocating their own capital. High-conviction buying often signals that management believes the current market price significantly undervalues future growth prospects, while strategic selling might occur for personal liquidity or portfolio diversification. Monitoring these shifts in ownership is essential for understanding the alignment between management and shareholders in the Market Equity sector.
Transactions on Chart
Open Full Chart| Filing Date | Trade Date | Reporting Person | Relationship | Type | Price | Qty | Total, $ | Owned After | Change, % |
|---|---|---|---|---|---|---|---|---|---|
| 2010-07-28 00:20 | 2010-07-27 | MILLER KAREN J | Officer - VP, Strategy & Corp Developmen | SELL | $57.40 | 8,540 | $490,182 | 13,800 | -38.2% |
| 2010-06-05 00:50 | 2010-06-02 | NAGARKATTI JAI | Officer - President & CEO | OPT+S | $52.35 | 54,600 | $2,858,567 | 88,821 | 0.0% |
| 2010-05-14 21:56 | 2010-05-13 | WICKS FRANK | Officer - President, Research Specialiti | OPT+S | $57.03 | 7,534 | $429,649 | 22,322 | 0.0% |
| 2010-04-27 23:54 | 2010-04-27 | Smoller David Adam | Other | SELL | $58.75 | 6,740 | $395,975 | 650 | -91.2% |
| 2010-03-25 23:01 | 2009-11-05 | JULIEN DAVID | Officer - President, Supply Chain | OPT+S | $54.29 | 36,200 | $1,965,244 | 39,129 | 0.0% |
| 2010-03-25 22:07 | 2009-12-01 | WICKS FRANK | Officer - President, Research Specialiti | OPT+S | $54.01 | 3,800 | $205,243 | 20,672 | 0.0% |
| 2010-03-10 00:22 | 2010-03-01 | HARVEY DAVID R | Director | SELL | $48.50 | 2,000 | $97,000 | 38,870 | -4.9% |
| 2010-03-02 18:21 | 2010-03-01 | HARVEY DAVID R | Director | OPT+S | $48.50 | 15,000 | $727,500 | 44,680 | 0.0% |
| 2010-03-02 20:22 | 2010-03-01 | HARVEY DAVID R | Director | SELL | $48.50 | 2,000 | $97,000 | 42,680 | -4.5% |
| 2010-02-24 01:24 | 2010-02-23 | HARRIS MICHAEL | Officer - Regional Director, EMEA | BUY | $47.50 | 400 | $19,000 | 2,317 | +20.9% |
| 2010-02-17 01:15 | 2010-02-16 | Green Eric Mark | Other | OPT+S | $48.50 | 5,000 | $242,500 | 2,940 | 0.0% |
| 2009-12-04 17:59 | 2009-12-02 | WICKS FRANK | Officer - President, Research Specialiti | SELL | $54.01 | 3,800 | $205,243 | 18,700 | -16.9% |
| 2009-12-04 18:49 | 2009-12-02 | KELLEY RODNEY | Officer - President, SAFC Biosciences | SELL | $53.81 | 6,831 | $367,590 | 569 | -92.3% |
| 2009-12-03 18:18 | 2009-12-02 | Turza Carl S | Officer - CIO | OPT+S | $53.73 | 2,200 | $118,197 | 3,100 | 0.0% |
| 2009-12-03 18:08 | 2009-12-02 | WICKS FRANK | Officer - President, Research Specialiti | OPT+S | $54.02 | 22,200 | $1,199,149 | 22,500 | 0.0% |
| 2009-11-17 18:51 | 2009-11-16 | Krosley Kevin | Other | OPT+S | $55.62 | 5,000 | $278,108 | 270 | 0.0% |
| 2009-11-16 23:31 | 2009-11-13 | JULIEN DAVID | Officer - President, Supply Chain | OPT+S | $55.07 | 36,200 | $1,993,523 | 22,529 | 0.0% |
| 2009-11-12 14:10 | 2009-11-11 | HUMMEL LARRY M | Other | OPT+S | $55.12 | 28,600 | $1,576,329 | 8,340 | 0.0% |
| 2009-11-10 19:57 | 2009-11-09 | Zihlmann Josef | Other | OPT+S | $55.30 | 5,000 | $276,517 | 4,540 | 0.0% |
| 2009-11-06 23:09 | 2009-11-05 | JULIEN DAVID | Officer - President, Supply Chain | OPT+S | $54.29 | 36,200 | $1,965,244 | 22,529 | 0.0% |
| 2009-10-28 01:47 | 2009-10-27 | JULIEN DAVID | Officer - President, Supply Chain | OPT+S | $54.09 | 20,000 | $1,081,872 | 36,529 | 0.0% |
| 2009-09-04 16:13 | 2009-09-03 | Green Eric Mark | Other | OPT+S | $49.85 | 5,000 | $249,226 | 2,940 | 0.0% |
| 2009-08-28 01:03 | 2009-08-25 | MILLER KAREN J | Officer - VP, Strategy & Corp Developmen | OPT+S | $51.51 | 22,200 | $1,143,624 | 13,940 | 0.0% |
| 2009-08-13 22:46 | 2009-08-12 | JULIEN DAVID | Officer - President, Supply Chain | OPT+S | $52.52 | 6,853 | $359,935 | 36,529 | 0.0% |
| 2009-08-13 22:48 | 2009-08-13 | WICKS FRANK | Officer - President, SAFC | OPT+S | $52.46 | 20,000 | $1,049,104 | 22,985 | 0.0% |
| 2009-08-10 17:35 | 2009-08-07 | JULIEN DAVID | Officer - President, Supply Chain | OPT+S | $52.50 | 7,747 | $406,731 | 36,529 | 0.0% |
| 2009-08-06 16:53 | 2009-08-05 | HARVEY DAVID R | Director | SELL | $51.86 | 5,000 | $259,318 | 43,480 | -10.3% |
| 2009-08-06 17:46 | 2009-08-05 | MILLER KAREN J | Officer - VP Strategy & Corp Development | SELL | $52.42 | 9,091 | $476,517 | 13,940 | -39.5% |
| 2009-06-02 21:30 | 2009-06-02 | COTTIER GILLES | Officer - President, SAFC | SELL | $49.15 | 700 | $34,402 | 15,569 | -4.3% |
| 2009-05-29 23:44 | 2009-05-29 | NAGARKATTI JAI | Officer - President & CEO | SELL | $47.63 | 2,100 | $100,031 | 79,181 | -2.6% |
| 2009-05-21 16:55 | 2009-05-20 | Krosley Kevin | Other | OPT+S | $46.66 | 5,000 | $233,286 | 270 | 0.0% |
| 2009-05-21 16:53 | 2009-05-20 | Zihlmann Josef | Other | OPT+S | $46.77 | 7,000 | $327,423 | 4,540 | 0.0% |
| 2009-05-18 23:20 | 2009-05-18 | VAN DEN DOOL GERRIT | Other | OPT+S | $45.38 | 10,000 | $453,828 | 6,540 | 0.0% |
| 2009-05-06 17:04 | 2009-05-04 | Zihlmann Josef | Other | OPT+S | $44.97 | 3,000 | $134,911 | 4,540 | 0.0% |
| 2009-03-05 01:22 | 2009-03-04 | RICHTER KIRK A | Officer - Treasurer | OPT+S | $33.74 | 6,600 | $222,684 | 80,182 | 0.0% |
| 2009-03-04 17:48 | 2009-03-03 | KELLEY RODNEY | Other | OPT+S | $33.69 | 7,400 | $249,313 | 7,400 | 0.0% |
| 2009-03-02 19:48 | 2009-02-27 | RICHTER KIRK A | Officer - Treasurer | OPT+S | $36.02 | 3,400 | $122,466 | 80,182 | 0.0% |
| 2008-11-14 00:41 | 2008-11-12 | Turza Carl S | Officer - CIO | BUY | $39.00 | 400 | $15,600 | 400 | +100.0% |
| 2008-08-13 23:37 | 2008-08-13 | HOGAN MICHAEL R | Officer - CAO & CFO | OPT+S | $62.05 | 15,600 | $968,005 | 44,083 | 0.0% |
| 2008-08-13 23:34 | 2008-08-13 | HOGAN MICHAEL R | Officer - CAO & CFO | OPT+S | $62.22 | 5,000 | $311,088 | 44,083 | 0.0% |
| 2008-08-06 00:54 | 2008-08-05 | Smoller David Adam | Other | SELL | $61.00 | 1,000 | $61,000 | 4,250 | -19.0% |
| 2008-08-06 00:51 | 2008-08-05 | NAGARKATTI JAI | Officer - President & CEO | OPT+S | $61.54 | 25,200 | $1,550,881 | 68,305 | 0.0% |
| 2008-08-06 00:53 | 2008-08-05 | HARVEY DAVID R | Director | OPT+S | $60.83 | 24,562 | $1,494,129 | 51,530 | 0.0% |
| 2008-08-06 00:52 | 2008-08-05 | HARVEY DAVID R | Director | OPT+S | $60.94 | 15,438 | $940,833 | 51,530 | 0.0% |
| 2008-08-04 18:32 | 2008-08-01 | Smoller David Adam | Other | OPT+S | $60.00 | 3,000 | $180,000 | 5,250 | 0.0% |
| 2008-07-31 18:47 | 2008-07-30 | HUMMEL LARRY M | Other | SELL | $60.94 | 5,514 | $336,008 | 6,400 | -46.3% |
| 2008-07-30 21:26 | 2008-07-30 | Feldker David P | Other | OPT+S | $61.42 | 2,500 | $153,549 | 2,930 | 0.0% |
| 2008-07-30 19:05 | 2008-07-29 | Feldker David P | Other | OPT+S | $60.18 | 1,000 | $60,180 | 2,930 | 0.0% |
| 2008-07-30 21:27 | 2008-07-30 | PORWOLL JOE | Other | OPT+S | $61.00 | 5,400 | $329,400 | 8,500 | 0.0% |
| 2008-07-31 00:24 | 2008-07-29 | HARVEY DAVID R | Director | SELL | $60.00 | 5,000 | $300,000 | 51,530 | -8.8% |
How to Interpret $SIAL Trades
Not every insider transaction in SIAL is a signal for immediate action. Professional investors look for "cluster buying"—when multiple executives simultaneously purchase $SIAL shares on the open market. It is crucial to distinguish between scheduled sales (under Rule 10b5-1) and voluntary increases in ownership, which demonstrate management’s true conviction that the stock is undervalued.
Data Source & Accuracy for SIAL
Insider activity data for SIAL is streamed in real-time directly from the SEC EDGAR system. We analyze raw Form 4 filings, filtering out technical adjustments and complex derivative transactions. This provides a transparent view of how ownership structure is evolving in $SIAL, allowing you to follow the capital of those with the most intimate knowledge of the company.
UNDERSTANDING THE DATA
FILING DATE: The date and time when the transaction was reported to the SEC. This is when the public first receives the information.
TRADE DATE: The actual day the insider executed the purchase or sale in the market.
INDUSTRY: The specific market sector the company operates in. Useful for identifying broader institutional capital flows across sectors.
OWNED AFTER: The total number of shares held by the insider following the transaction. This highlights the insider's remaining conviction in the company.
CHANGE %: The percentage increase or decrease of the insider's total position. Large percentage changes often carry more weight than the dollar amount alone.
TRADE TYPES DEFINITIONS
BUY: An open market purchase. Typically indicates an insider's belief that the stock is undervalued or poised for growth.
SELL: An open market sale. While often used for diversification or liquidity, large or unexpected sales can be a warning signal.
OPT+S (OPTION EXERCISE & SALE): This occurs when an insider exercises their stock options and sells them immediately. Often part of a structured compensation plan.