William Lewis, the Chair and CEO of $INSM, sold 7,221 shares of the company on 02-09-2026 for an estimated $1,068,852. We received data on the trade from a recent SEC filing. This was a sale of approximately 2.3% of their shares of this class of stock. Following this trade, they now own 302,472 shares of this class of $INSM stock.
$INSM Insider Trading Activity
$INSM insiders have traded $INSM stock on the open market 120 times in the past 6 months. Of those trades, 0 have been purchases and 120 have been sales.
Here’s a breakdown of recent trading of $INSM stock by insiders over the last 6 months:
- MARTINA M.D. FLAMMER (Chief Medical Officer) has made 0 purchases and 35 sales selling 267,135 shares for an estimated $41,532,420.
- ORLOV S NICOLE SCHAEFFER (Chief People Strategy Officer) has made 0 purchases and 11 sales selling 116,520 shares for an estimated $18,223,351.
- LEO LEE has made 0 purchases and 5 sales selling 75,000 shares for an estimated $14,692,249.
- WILLIAM LEWIS (Chair and CEO) has made 0 purchases and 36 sales selling 84,258 shares for an estimated $13,949,742.
- MICHAEL ALEXANDER SMITH (Chief Legal Officer) has made 0 purchases and 18 sales selling 55,200 shares for an estimated $9,127,795.
- MELVIN MD SHAROKY has made 0 purchases and 3 sales selling 40,000 shares for an estimated $6,849,100.
- ROGER ADSETT (Chief Operating Officer) has made 0 purchases and 6 sales selling 30,081 shares for an estimated $4,059,827.
- ELIZABETH M ANDERSON has made 0 purchases and 2 sales selling 15,000 shares for an estimated $2,981,600.
- SARA BONSTEIN (Chief Financial Officer) has made 0 purchases and 4 sales selling 5,390 shares for an estimated $925,675.
To track insider transactions, check out Quiver Quantitative's insider trading dashboard.
$INSM Hedge Fund Activity
We have seen 370 institutional investors add shares of $INSM stock to their portfolio, and 287 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- PRICE T ROWE ASSOCIATES INC /MD/ removed 4,299,239 shares (-38.3%) from their portfolio in Q3 2025, for an estimated $619,133,408
- FMR LLC added 4,087,702 shares (+80.3%) to their portfolio in Q3 2025, for an estimated $588,669,965
- CAPITAL INTERNATIONAL INVESTORS removed 2,402,182 shares (-31.8%) from their portfolio in Q4 2025, for an estimated $418,075,755
- D. E. SHAW & CO., INC. added 2,234,845 shares (+65.3%) to their portfolio in Q3 2025, for an estimated $321,840,028
- DEEP TRACK CAPITAL, LP removed 1,750,000 shares (-100.0%) from their portfolio in Q3 2025, for an estimated $252,017,499
- ORBIS ALLAN GRAY LTD added 1,726,734 shares (+113.3%) to their portfolio in Q3 2025, for an estimated $248,666,963
- ARTISAN PARTNERS LIMITED PARTNERSHIP added 1,623,342 shares (+49.0%) to their portfolio in Q3 2025, for an estimated $233,777,481
To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard.
$INSM Congressional Stock Trading
Members of Congress have traded $INSM stock 2 times in the past 6 months. Of those trades, 0 have been purchases and 2 have been sales.
Here’s a breakdown of recent trading of $INSM stock by members of Congress over the last 6 months:
- REPRESENTATIVE GILBERT RAY CISNEROS, JR. has traded it 2 times. They made 0 purchases and 2 sales worth up to $30,000 on 10/03, 09/22.
To track congressional stock trading, check out Quiver Quantitative's congressional trading dashboard.
$INSM Analyst Ratings
Wall Street analysts have issued reports on $INSM in the last several months. We have seen 11 firms issue buy ratings on the stock, and 0 firms issue sell ratings.
Here are some recent analyst ratings:
- UBS issued a "Buy" rating on 01/06/2026
- HC Wainwright & Co. issued a "Buy" rating on 12/18/2025
- Goldman Sachs issued a "Buy" rating on 12/18/2025
- TD Cowen issued a "Buy" rating on 12/18/2025
- Wells Fargo issued a "Overweight" rating on 12/16/2025
- Mizuho issued a "Outperform" rating on 12/01/2025
- RBC Capital issued a "Outperform" rating on 10/31/2025
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 17 analysts offer price targets for $INSM in the last 6 months, with a median target of $221.0.
Here are some recent targets:
- Matthew Harrison from Morgan Stanley set a target price of $162.0 on 01/30/2026
- Eliana Merle from Barclays set a target price of $231.0 on 01/28/2026
- Adam Walsh from Roth Capital set a target price of $212.0 on 01/23/2026
- Leonid Timashev from RBC Capital set a target price of $200.0 on 01/21/2026
- Ashwani Verma from UBS set a target price of $215.0 on 01/06/2026
- Ritu Baral from TD Cowen set a target price of $241.0 on 12/18/2025
- Vamil Divan from Guggenheim set a target price of $221.0 on 12/18/2025
This article is not financial advice. See Quiver Quantitative's disclaimers for more information.
