Insmed Officer Files to Sell $1.56M in Stock via 10b5-1 Plan
INSMED Inc
Subscribe to track INSM
Premium users can add ticker alerts and receive realtime notification updates.
Filing Summary
Insmed Officer Files to Sell $1.56M in Stock via 10b5-1 Plan
Company: INSMED Inc Form: 144 | Filed: 2026/03/05 Significance: Low
Insider: William Lewis Title: Officer | Relationship: Officer
Transaction: • Type: Proposed Sale • Shares: 10,699 • Price: ~$146.02 (Est.) • Value: $1,562,311 • Plan: 10b5-1 Adopted 09/04/2025
Key Insight: Routine programmatic selling. Transaction represents <0.01% of market cap and follows a consistent pattern of sales over the last 3 months.
Market Context: Insmed is a $32.19B market cap company; this $1.56M transaction is immaterial to broader liquidity.
Comprehensive Analysis
SEC Filing Analysis: INSMED Inc
Executive Summary
- Trading Significance: Low
- Key Takeaway: Officer William Lewis continues a pattern of programmatic selling via a 10b5-1 plan adopted in September 2025.
- Market Impact: Negligible; transaction size is immaterial relative to the company's $32B valuation.
Company Information
| Field | Value |
|---|---|
| Company | INSMED Inc |
| CIK | 0001104506 |
| Industry | Pharmaceutical Preparations |
| Market Cap | $32.19 Billion |
Insider Information
| Field | Value |
|---|---|
| Name | William Lewis |
| CIK | 0001402051 |
| Title/Position | Officer |
| Relationship | Officer |
Transaction Details
| Field | Value |
|---|---|
| Form Type | 144 (Notice of Proposed Sale) |
| Transaction Date | 2026/03/05 (Approx. Sale) |
| Transaction Code | S (Sale) |
| Security Type | Common Stock |
| Shares Involved | 10,699 |
| Price Per Share | ~$146.02 (Calculated) |
| Total Value | $1,562,311 |
| Ownership Type | Direct |
Financial Impact Assessment
Transaction Materiality
| Metric | Value |
|---|---|
| Transaction Value | $1,562,311 |
| % of Market Cap | 0.0048% |
| Shares Transacted | 10,699 |
| % of Shares Outstanding | 0.005% |
| Materiality Assessment | Low |
Impact Evaluation
- Market Cap Context: For a Large-Cap company ($32.19B), a $1.56M sale is routine volume and does not signal a shift in insider sentiment.
- Transaction Significance: The transaction represents less than 0.01% of shares outstanding, indicating zero risk of supply-side pressure on the stock price.
- Pattern Recognition: The filing lists multiple sales in Jan/Feb 2026, confirming this is part of a structured liquidity plan rather than a reaction to current news.
Market Impact Analysis
Stock Impact Prediction
- Direction: Neutral
- Reasoning: The sale is pre-planned (10b5-1) and statistically insignificant relative to the company's float and market capitalization.
Volume & Sentiment
- Expected Volume Impact: None.
- Sentiment Indicator: Neutral. The sale is associated with "Stock Plan Activity," likely an RSU vest-and-sell transaction.
Additional Context
Transaction Notes
- 10b5-1 Plan: Yes, adopted on 09/04/2025. This provides an affirmative defense against insider trading allegations and indicates the trade was scheduled months in advance.
- Source of Shares: The shares to be sold were acquired from the Issuer on the same day (03/05/2026) via Stock Plan Activity, suggesting an immediate liquidation of vested equity.
Get Real-Time Alerts
Join our community to receive instant notifications when high-significance filings are published
Important Disclaimer
This content is drawn from public SEC filings and may contain errors. It is for informational purposes only and is not investment, legal, or tax advice.
Nothing here is a recommendation to buy, sell, or hold any security. Do your own due diligence.