INSMED Inc — Director's Dealing 2018

May 31, 2018

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: INSMED Inc (INSM)
CIK: 0001104506
Period of Report: 2018-05-29

Reporting Person: Schaeffer Orlov S Nicole (Chief People Strategy Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2018-05-29	Common Stock	M	11584	$10.85	Acquired	22253	Direct
2018-05-29	Common Stock	S	11584	$27.68	Disposed	10669	Direct
2018-05-30	Common Stock	M	25991	$10.85	Acquired	36660	Direct
2018-05-30	Common Stock	S	25991	$28.24	Disposed	10669	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2018-05-29	Stock Option (right to buy)	$10.85	M	11584	Disposed	2026-05-19	Common Stock (11584)	Direct
2018-05-30	Stock Option (right to buy)	$10.85	M	25991	Disposed	2026-05-19	Common Stock (25991)	Direct

Footnotes

F1: This is the weighted average sales price representing 11,584 shares sold at prices ranging from $27.60 to $27.84 per share. The number sold at each price will be made available to the SEC staff, the issuer, or a security holder of the issuer upon request.

F2: This is the weighted average sales price representing 25,991 shares sold at prices ranging from $28.00 to $28.32 per share. The number sold at each price will be made available to the SEC staff, the issuer, or a security holder of the issuer upon request.

F3: Stock options granted under the Company's 2015 Incentive Plan. 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 the six month anniversary of the first anniversary date and each six month anniversary date thereafter through the fourth anniversary of the date of grant.