Isilon Systems, Inc.

Isilon Systems, Inc. insiders are currently net sellers of ISLN stock, showing bearish sentiment over the past 90 days. Total sales of $100.3M outpace purchases of $4.3M, creating a net outflow of $96.0M.

Isilon Systems, Inc. has 28 active insiders who have filed SEC Form 4 transactions in the past 90 days. Barry J. Fidelman (Executive) leads with 33 transactions totaling $473.7M. Venture Associates V. Lp Atlas (Executive) follows with 11 transactions worth $445.9M. Open-market purchases require insiders to invest their own capital, demonstrating genuine conviction.

The Insider Alignment Score measures the ratio of buying to selling activity on a 0-100 scale. Isilon Systems, Inc.'s current score of 4/100 indicates bearish insider sentiment. Scores below 40 indicate selling pressure exceeds buying. Insider selling often reflects diversification needs, tax optimization, or estate planning.

The most recent insider transaction occurred on Dec 21, 2010, when Helsel Brett (Executive) disposed of 7,500 shares at $33.85 per share for $253.9K. This appears to be a discretionary trade.

Based on SEC Form 4 filings from the past 90 days, ISLN insider trading sentiment is currently bearish with an Alignment Score of 4/100. The negative net flow of $96.0M shows more selling than buying. However, 0% of recent transactions are 10b5-1 scheduled trades.

SEC Form 4 is the primary disclosure mechanism for insider trading at publicly traded companies like Isilon Systems, Inc.. Corporate insiders must file within two business days of any transaction, making it one of the most timely sources of executive sentiment. At ISLN, we track all Form 4 filings—currently showing 331 transactions from 28 insiders over 90 days.

A 10b5-1 plan allows Isilon Systems, Inc. executives to pre-schedule stock sales when they don't possess material non-public information. At ISLN, approximately 0% of recent transactions are 10b5-1 trades. Most trading activity at ISLN appears discretionary, making insider signals more meaningful.

You can monitor Isilon Systems, Inc. (ISLN) insider trading activity on this page, which updates within hours of new SEC Form 4 filings. We track all 28 active insiders and provide real-time transaction feeds, the Alignment Score, 10b5-1 vs. discretionary breakdowns, and direct links to SEC EDGAR filings.

Our Alignment Score measures the ratio of insider buying to selling on a scale of 0-100. A score above 70 indicates strong bullish sentiment, while below 30 suggests bearish activity. Isilon Systems, Inc.'s current score of 4/100 indicates bearish sentiment with significant insider selling pressure. This is calculated from $4.3M in purchases versus $100.3M in sales over 90 days, resulting in a net flow of -$96.0M.

SEC Form 4 filings are mandatory reports that Isilon Systems, Inc. insiders must submit within 2 business days. Each filing includes the insider's name, relationship, transaction type, shares, and price. Transaction codes: P (purchase), S (sale), A (award), M (option exercise), G (gift). At ISLN, the most common type is "U" with 28 occurrences. The most recent Form 4 was filed on Dec 21, 2010 by Helsel Brett.

Rule 10b5-1 allows corporate insiders to establish pre-scheduled trading plans when they don't possess material non-public information. At Isilon Systems, Inc., approximately 0% of recent transactions are executed under 10b5-1 plans, while 100% appear to be discretionary trades. The low percentage means most insider activity at ISLN represents discretionary decisions with more informational value.