- Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Expires: February 28, 2011 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Drucker Andrea Holtzman

2. Date of Event Requiring Statement (MM/DD/YYYY) 7/18/2011

3. Issuer Name and Ticker or Trading Symbol

INSMED INC [INSM]

(Last) (First) (Middle)

C/O INSMED INCORPORATED, 11 DEER PARK DRIVE, SUITE 117

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___ X ___ Officer (give title below) _____ Other (specify below)
Senior V.P., General Counsel /

(Street)

MONMOUTH JUNCTION, NJ 08852

(City) (State) (Zip)

5. 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 Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Restricted Stock Units	⁽¹⁾	⁽¹⁾	Common Stock	45000 ⁽²⁾	$0	D

Explanation of Responses:
( 1)	Pursuant to the Management Agreement these awards are subject to both time (50% of the Award) and performance-based (50% of the Award) vesting. The portion of the Award subject to time-based vesting shall vest on the 3rd anniversary of the grant date or July 18, 2014, so long as the member of management continues to be employed by the Company. The portion of the Award subject to performance-based vesting shall vest based on the date on which the Board determines that Arikace has achieved its primary endpoint in a Phase III trial, provided that the Grantee continues to be employed with the Company on such date.
( 2)	Restricted Stock Units will be paid to the grantee in cash upon vesting, unless one of the following occurs: 1) the shareholders of the issuer approve an amendment to the issuer's Amended & Restated 2000 Stock Incentive Plan to increase the number of shares of common stock that may be issued under the plan or 2) additional shares become available to the plan through stock option expirations and/or employee terminations, in which case the grantee may receive shares of common stock in lieu of cash.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Drucker Andrea Holtzman C/O INSMED INCORPORATED 11 DEER PARK DRIVE, SUITE 117 MONMOUTH JUNCTION, NJ 08852			Senior V.P., General Counsel

Signatures
/s/ Andrea Holtzman Drucker		7/26/2011
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.