About this page
Insider trades reported on SEC Form 4: when the people who run a company buy or sell its shares with their own money.
How to read it
- Form 4
- The form a company insider (officer, director or owner of more than 10%) must file with the SEC within two business days of buying or selling the company's shares.
- Buy (P) and Sell (S)
- Open-market purchases and sales. Gifts, option exercises and automatic tax withholding are left out because they say little about what the insider thinks.
- Value
- Shares times price, as reported on the filing.
- 10b5-1
- A trade made under a plan set up in advance. Planned sales are common and usually say less than an unplanned purchase.
- Late filing
- A Form 4 filed more than two business days after the trade.
- Vs. S&P 500
- How the stock did after the trade minus how the overall market did in the same weeks.
A real example
In January 2016, when bank stocks were falling, JPMorgan Chase CEO Jamie Dimon bought 500,000 JPMorgan shares with his own money, worth about $26 million. His Form 4 made the purchase public within days, and investors read it as a strong sign of confidence.
Explain it like I'm 13
If the coach of a team bets his own allowance that his team will win, that tells you something. A Form 4 is the note a company boss must hand in whenever he buys or sells his own company's shares, so everyone can see it.
Data from public SEC filings and congressional reports. Information, not investment advice. Check every number against the filing linked on the page.
INSMED Inc (INSM): Insider Trades and Fund Holdings
In the past 12 months, INSMED Inc insiders reported no open-market purchases and 9 sales worth $45.3M; 6 of the sales were reported as made under a 10b5-1 trading plan.
Timeline: news and trades
Company filings (8-K), insider trades, notices of planned sales (Form 144), Congress trades and fund moves in the past year, newest first.
- Oct 20, 2026NewsCompany reported: Executive or director change
- Oct 5, 2026NewsCompany reported: Executive or director change
- Sep 10, 2026Planned saleBrennan David R (director) filed notice to sell about $3.1 million around Sep 9, 2026
- Sep 9, 2026Insider saleDirector David R. Brennan sold $3.1 million
- Aug 17, 2026Insider saleDirector Melvin Md Sharoky sold $637,650
- Aug 17, 2026Planned saleMELVIN SHAROKY (director) filed notice to sell about $637,637 around Aug 17, 2026
- Aug 10, 2026Insider saleCOO Roger Adsett sold $32 million (4 days after: quarterly or annual results)
- Aug 10, 2026Planned saleRoger Adsett (officer) filed notice to sell about $32 million around Aug 10, 2026
- Aug 6, 2026NewsCompany reported: Quarterly or annual results
- Aug 6, 2026Insider saleChief Medical Officer Martina M.d. Flammer sold $3.5 million under a 10b5-1 plan (0 days after: quarterly or annual results)
- Aug 6, 2026Planned saleMartina Flammer (officer) filed notice to sell about $3.5 million around Aug 6, 2026
- Jul 23, 2026Insider saleCEO William Lewis sold $1.1 million under a 10b5-1 plan
- Jul 9, 2026Insider saleCEO William Lewis sold $1.3 million under a 10b5-1 plan
- Jul 6, 2026Insider saleChief Medical Officer Martina M.d. Flammer sold $1.4 million under a 10b5-1 plan
- Jun 30, 2026FundBridgewater Associates added 54% in Q2 2026 (13F filed Aug 14, 2026)
- Jun 30, 2026FundDuquesne Family Office added 23% in Q2 2026 (13F filed Aug 14, 2026)
- Jun 30, 2026FundRenaissance Technologies sold out in Q2 2026 (13F filed Aug 13, 2026)
- Jun 25, 2026Insider saleCEO William Lewis sold $2.2 million under a 10b5-1 plan
- Jun 22, 2026Insider saleGeneral Counsel Michael Alexander Smith sold $173,051 under a 10b5-1 plan
- Jun 10, 2026CongressRep. Josh Gottheimer partial sell $1K–$15K (joint)
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 11, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Sep 11 | David R. BrennanDirector | ▼ SELL | $3.10M |
| Aug 19 | Melvin Md SharokyDirector | ▼ SELL | $638K |
| Aug 12 | Roger AdsettCOO | ▼ SELL | $32.0M |
| Aug 7 | Martina M.d. FlammerChief Medical Officer | ▼ SELL10b5-1 | $3.49M |
| Jul 24 | William LewisCEO | ▼ SELL10b5-1 | $1.13M |
| Jul 10 | William LewisCEO | ▼ SELL10b5-1 | $1.26M |
| Jul 8 | Martina M.d. FlammerChief Medical Officer | ▼ SELL10b5-1 | $1.35M |
| Jun 26 | William LewisCEO | ▼ SELL10b5-1 | $2.21M |
| Jun 24 | Michael Alexander SmithGeneral Counsel | ▼ SELL10b5-1 | $173K |
Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| David R. Brennan | Director | 0 | $0 | 1 | $3.10M |
| Melvin Md Sharoky | Director | 0 | $0 | 1 | $638K |
| Roger Adsett | COO | 0 | $0 | 1 | $32.0M |
| Martina M.d. Flammer | Chief Medical Officer | 0 | $0 | 2 | $4.85M |
| William Lewis | CEO | 0 | $0 | 3 | $4.60M |
| Michael Alexander Smith | General Counsel | 0 | $0 | 1 | $173K |
Trades by members of Congress
Reported under the STOCK Act. Amounts are ranges from the form. All Congress trades →
| Filed | Member | Type | Amount |
|---|---|---|---|
| Jul 7 |  Rep. Josh GottheimerD-NJ-5 | ▼ PARTIAL SELL | $1K–$15K |
| Nov 18 | ▼ SELL | $1K–$15K | |
| Oct 10 | ▼ PARTIAL SELL | $1K–$15K | |
| Sep 12 | ▼ PARTIAL SELL | $1K–$15K | |
| Aug 14 | ▼ PARTIAL SELL | $1K–$15K | |
| Jul 16 | Rep. Josh GottheimerD-NJ-5 | ▲ BUY | $1K–$15K |
A All 9 insider trades reported on time. How it is graded
Tracked funds that report INSM
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Bridgewater Associates | 455,392 | $48.6M | ▲ +54.1% |
| Duquesne Family Office | 1,424,690 | $152K | ▲ +23.4% |
| Renaissance Technologies | 0 | $0 | ▼ Sold out |
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →