FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
Washington, D.C. 20549
OMB Number: 3235-0287
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
1. Name and Address of Reporting Person * SORIANO JOHN 2. Issuer Name and Ticker or Trading Symbol INSMED Inc [ INSM ] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable)_____ Director                    _____ 10% Owner
__X__ Officer (give title below)    _____ Other (specify below)
Chief Compliance Officer
(Last)         (First)         (Middle)
700 US HIGHWAY 202/206
3. Date of Earliest Transaction (MM/DD/YYYY)
(City)       (State)       (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)
6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock (1) 5/15/2020    F    994  D $25.46  78253  D   
Common Stock  8/10/2020    M    52046  A $13.91  77259  D   
Common Stock  8/10/2020    S    52046  D $30.29 (2) 25213  D   

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (right to buy)  $13.91  8/10/2020    M        52046    (3) 1/3/2029  Common Stock  52046  $0  86744  D   

Explanation of Responses:
(1)  Represents the withholding of shares of common stock to satisfy tax withholding obligations in connection with the vesting of restricted stock units. This transaction was not reported previously due to a clerical error.
(2)  This is the weighted average sales price representing 52,046 shares sold at prices ranging from $30.12 to $30.49 per share. The reporting person undertakes to provide to the SEC staff, the issuer, or a security holder of the issuer the number of shares sold at each price within the price range upon request.
(3)  The options become exercisable based on the following vesting schedule: twenty five percent (25%) vest on the first anniversary of the grant date and an additional twelve and one half percent (12.5%) vest on each sixth month anniversary date thereafter through the fourth anniversary of the date of grant.

Reporting Owners
Reporting Owner Name / Address
Director 10% Owner Officer Other
700 US HIGHWAY 202/206

Chief Compliance Officer

/s/ John Soriano, by Christine Pellizzari as Attorney-in-fact 8/12/2020
**Signature of Reporting Person Date
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