Martina M.D. Flammer, the Chief Medical Officer of $INSM, sold 18,278 shares of the company on 08-06-2026 for an estimated $2,365,173. We received data on the trade from a recent SEC filing. This was a sale of approximately 23.2% of their shares of this class of stock. Following this trade, they now own 60,486 shares of this class of $INSM stock.
$INSM Insider Trading Activity
$INSM insiders have traded $INSM stock on the open market 65 times in the past 6 months. Of those trades, 0 have been purchases and 65 have been sales.
Here’s a breakdown of recent trading of $INSM stock by insiders over the last 6 months:
- WILLIAM LEWIS (Chair and CEO) has made 0 purchases and 39 sales selling 151,956 shares for an estimated $19,491,785.
- ROGER ADSETT (Chief Operating Officer) has made 0 purchases and 5 sales selling 96,267 shares for an estimated $15,418,173.
- MARTINA M.D. FLAMMER (Chief Medical Officer) has made 0 purchases and 11 sales selling 75,181 shares for an estimated $8,732,031.
- MICHAEL ALEXANDER SMITH (Chief Legal Officer) has made 0 purchases and 8 sales selling 58,635 shares for an estimated $8,362,319.
- SARA BONSTEIN (Chief Financial Officer) has made 0 purchases and 2 sales selling 10,676 shares for an estimated $1,206,898.
To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.
$INSM Hedge Fund Activity
We have seen 319 institutional investors add shares of $INSM stock to their portfolio, and 359 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- DARWIN GLOBAL MANAGEMENT, LTD. removed 4,128,093 shares (-19.7%) from their portfolio in Q1 2026, for an estimated $675,025,767
- FMR LLC added 3,232,231 shares (+32.6%) to their portfolio in Q1 2026, for an estimated $528,534,413
- ORBIS ALLAN GRAY LTD removed 2,307,133 shares (-55.2%) from their portfolio in Q1 2026, for an estimated $377,262,388
- ARTISAN PARTNERS LIMITED PARTNERSHIP added 1,683,552 shares (+34.8%) to their portfolio in Q1 2026, for an estimated $275,294,423
- CAPITAL WORLD INVESTORS added 1,362,291 shares (+inf%) to their portfolio in Q1 2026, for an estimated $222,761,824
- PARADIGM BIOCAPITAL ADVISORS LP added 1,254,488 shares (+inf%) to their portfolio in Q1 2026, for an estimated $205,133,877
- WESTFIELD CAPITAL MANAGEMENT CO LP added 1,035,938 shares (+239.5%) to their portfolio in Q1 2026, for an estimated $169,396,581
To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.
$INSM Congressional Stock Trading
Members of Congress have traded $INSM stock 1 times in the past 6 months. Of those trades, 0 have been purchases and 1 have been sales.
Here’s a breakdown of recent trading of $INSM stock by members of Congress over the last 6 months:
- REPRESENTATIVE JOSH GOTTHEIMER sold up to $15,000 on 06/10.
To track congressional stock trading, check out Quiver Quantitative's congressional trading dashboard. You can access data on congressional stock trades through the Quiver Quantitative API Congress trades endpoint.
$INSM Analyst Ratings
Wall Street analysts have issued reports on $INSM in the last several months. We have seen 1 firms issue buy ratings on the stock, and 0 firms issue sell ratings.
Here are some recent analyst ratings:
- HC Wainwright & Co. issued a "Buy" rating on 02/23/2026
To track analyst ratings and price targets for $INSM, check out Quiver Quantitative's $INSM forecast page.
$INSM Price Targets
Multiple analysts have issued price targets for $INSM recently. We have seen 15 analysts offer price targets for $INSM in the last 6 months, with a median target of $212.0.
Here are some recent targets:
- Josh Schimmer from Evercore ISI Group set a target price of $160.0 on 06/22/2026
- Jessica Fye from JP Morgan set a target price of $179.0 on 06/08/2026
- Leonid Timashev from RBC Capital set a target price of $195.0 on 06/05/2026
- Danielle Brill from Truist Securities set a target price of $185.0 on 05/14/2026
- Benjamin Burnett from Wells Fargo set a target price of $160.0 on 05/08/2026
- Vamil Divan from Guggenheim set a target price of $226.0 on 05/08/2026
- Adam Walsh from Roth Capital set a target price of $212.0 on 04/17/2026
This article is not financial advice. See Quiver Quantitative's disclaimers for more information.
