Insmed Inc
Held by 11 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 457669307 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
In plain English: 11 of the investors we track own this stock. In the latest quarter, 8 of them bought more of it and 4 sold some or all of theirs (2 bought it for the first time). That tells you what they did last quarter — not what the stock will do next.
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Managers holding
11
0 vs last quarter (like-for-like)
Total value held
$1.89B
Across tracked managers
Average weight ⓘOn average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
0.5%
Of each manager's book
QoQ value ⓘLike-for-like: only managers that filed both quarters are compared, so a manager filing late (or confidentially) does not look like buying or selling. Includes price changes.
-$248.98M
-14.0% vs last quarter
Net shares bought
+3.5M
Est. net flow +$365.46M
Quarter activity
8 bought · 4 sold
2 new · 2 sold out
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns INSM?
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Who owns INSM? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value ↓ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | David Shaw | D.E. Shaw & Co. | 5.88M | $626.71M | 0.4% | Added | +252.1K | +4.5% | +$26.88M |
| 2 | Norges Bank | Norges Bank Investment Management | 3.38M | $360.12M | 0.0% | — | — | — | — |
| 3 | Ken Griffin | Citadel Advisors | 2.56M | $272.62M | 0.2% | Added | +374.4K | +17.2% | +$39.92M |
| 4 | Israel Englander | Millennium Management | 2.05M | $218.36M | 0.1% | Added | +890.2K | +76.9% | +$94.92M |
| 5 | Stanley Druckenmiller | Duquesne Family Office | 1.42M | $151.90M | 3.5% | Added | +270.6K | +23.4% | +$28.85M |
| 6 | Two Sigma | Two Sigma Investments | 1.24M | $132.45M | 0.1% | Added | +1.0M | +424.1% | +$107.17M |
| 7 | Steve Cohen | Point72 Asset Management | 537.00K | $57.25M | 0.1% | New | +537.0K | — | +$57.25M |
| 8 | Ray Dalio | Bridgewater Associates | 455.39K | $48.55M | 0.2% | Added | +159.8K | +54.1% | +$17.04M |
| 9 | Tom Marsico | Marsico Capital Management | 129.53K | $13.81M | 0.4% | New | +129.5K | — | +$13.81M |
| 10 | Fred Alger | Fred Alger Management | 82.33K | $8.78M | 0.0% | Reduced | -43.4K | -34.5% | -$4.63M |
| 11 | Ron Baron | Baron Capital (BAMCO) | 10.00K | $1.07M | 0.0% | Reduced | -10.0K | -50.0% | -$1.07M |
Column filters
| Manager | Fund | Shares sold | Value last quarter ↑ |
|---|---|---|---|
| Jim Simons | Renaissance Technologies | -20.3K | $3.32M |
| Parnassus Investments | Parnassus Investments LLC | -69.5K | $11.37M |
Politician trades
Column filters
| Politician | Date | Ticker | Asset | Type | Reported range ⓘThe dollar range the politician reported. Exact amounts are not disclosed. | Est. size ⓘOur estimate only: the midpoint of the reported range. | Owner | Account ⓘSubholding Of: the account the trade was in, as named on the report (e.g. an IRA or a brokerage account). The same stock bought on the same day in different accounts is a separate trade in each account. | Filed ↓ | Filing delay ⓘDays between the trade and the report. Over 45 days is late under the STOCK Act. | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Josh Gottheimer Politician | Jun 10, 2026 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Joint | Morgan Stanley - Select UMA Account # 1 | Jul 7, 2026 | 27 days | PTR ↗ |
| Gil Cisneros Politician | Oct 3, 2025 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | — | Nov 18, 2025 | 46 days Late | PTR ↗ |
| Gil Cisneros Politician | Sep 22, 2025 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | — | Oct 10, 2025 | 18 days | PTR ↗ |
| Gil Cisneros Politician | Aug 8, 2025 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Sep 12, 2025 | 35 days | PTR ↗ |
| Gil Cisneros Politician | Jul 7, 2025 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | 150 Main Street Trust > Bank of America | Aug 14, 2025 | 38 days | PTR ↗ |
| Josh Gottheimer Politician | Jun 16, 2025 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Joint | Morgan Stanley - Select UMA Account # 1 | Jul 16, 2025 | 30 days | PTR ↗ |
| Josh Gottheimer Politician | Apr 9, 2025 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Joint | Morgan Stanley - Select UMA Account # 1 | May 14, 2025 | 35 days | PTR ↗ |
| Josh Gottheimer Politician | Jun 21, 2024 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Joint | Morgan Stanley - Select UMA Account # 1 | Jul 9, 2024 | 18 days | PTR ↗ |
| Josh Gottheimer Politician | May 28, 2024 | INSM | Insmed Incorporated - Common Stock (INSM) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Joint | Morgan Stanley - Select UMA Account # 1 | Jun 8, 2024 | 11 days | PTR ↗ |