---
title: "Insmed Insiders Sold Shares Worth Over $3.2M"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/286609887.md"
description: "Insmed executives sold shares totaling over $3.2 million. CEO William Lewis sold 13,283 shares for $1.54 million, CFO Sara Bonstein sold 8,272 shares for $961,040, and COO Roger Adsett sold 5,837 shares for $678,142, all to cover tax obligations and broker fees. Post-transactions, Lewis holds 287,902 shares, Bonstein 71,486 shares, and Adsett 100,973 shares."
datetime: "2026-05-15T20:20:35.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/286609887.md)
  - [en](https://longbridge.com/en/news/286609887.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/286609887.md)
---

# Insmed Insiders Sold Shares Worth Over $3.2M

William Lewis, a director and the Chair and CEO, sold 13,283 shares of common stock at $116.18 per share to satisfy tax withholding on vested restricted stock units and related broker fees for a total sale amount of $1,543,218; following the transaction, Lewis directly owned 287,902 shares and indirectly owned 233,924 shares held by a trust.

Sara Bonstein, an officer serving as Chief Financial Officer, sold 8,272 shares of common stock at $116.18 per share on May 13, 2026 to satisfy tax withholding obligations upon the vesting of restricted stock units and to cover related broker fees for a total sale amount of $961,040; after the transaction, Bonstein directly owned 71,486 shares of common stock.

Roger Adsett, an officer serving as Chief Operating Officer, sold 5,837 shares of common stock at $116.18 per share to satisfy tax withholding obligations and cover related broker fees for a total sale amount of $678,142; following the transaction, Adsett directly beneficially owned 100,973 shares of common stock.

Reporter Name

Relationship

Type

Amount

SEC Filing

Lewis William

Chair and CEO

Sell

$1,543,218

Form 4

Bonstein Sara

Chief Financial Officer

Sell

$961,040

Form 4

Adsett Roger

Chief Operating Officer

Sell

$678,142

Form 4

**Disclaimer**

This is an AI-powered summary. It may contain inaccuracies. Consider verifying important information with the source. Please note this summary is solely based on documents filed with the SEC.

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