13G Filing: Cormorant Global Healthcare Master Fund and Proteostasis Therapeutics, Inc. (PTI)

Page 3 of 8 SEC Filing

1
Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only)
Cormorant Global Healthcare GP, LLC
2
Check the Appropriate Box if a Member of a Group (See Instructions)
(a)            [ ]
(b)            [x]
3
SEC Use Only
4
Citizenship or Place of Organization.
Delaware
Number
of Shares
Beneficially
Owned by
Each
Reporting
Person With
5  Sole Voting Power
0 shares
6  Shared Voting Power
1,450,825 shares (1,466,734 shares as of February 26, 2016)
Refer to Item 4 below.
7  Sole Dispositive Power
0 shares
8  Shared Dispositive Power
1,450,825 shares (1,466,734 shares as of February 26, 2016)
Refer to Item 4 below.
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,450,825 shares (1,466,734 shares as of February 26, 2016)
Refer to Item 4 below.
10
Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)     [ ] N/A
11
Percent of Class Represented by Amount in Row (9)*
7.6% (7.7% as of February 26, 2016)
Refer to Item 4 below.
12
Type of Reporting Person (See Instructions)
OO (Limited Liability Company)

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