SEC FORM 4 SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
 
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
Third Rock Ventures II, L.P.

(Last) (First) (Middle)
C/O THIRD ROCK VENTURES, LLC
29 NEWBURY STREET, 3RD FLOOR

(Street)
BOSTON MA 02116

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Blueprint Medicines Corp [ BPMC ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
11/18/2015
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X 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. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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 11/18/2015 J(1) 739,306 D $0 6,653,753 D(2)
Common Stock 11/18/2015 J(3) 220,387 A $0 220,387 D(4)
Common Stock 11/18/2015 J(5) 220,387 D $0 0 D(4)
Common Stock 11/18/2015 J(6) 40,290 A $0 40,290 D
Common Stock 11/18/2015 J(7) 40,290 A $0 40,290 D
Common Stock 11/18/2015 J(8) 40,290 A $0 40,290 D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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 (Month/Day/Year) 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: 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
1. Name and Address of Reporting Person*
Third Rock Ventures II, L.P.

(Last) (First) (Middle)
C/O THIRD ROCK VENTURES, LLC
29 NEWBURY STREET, 3RD FLOOR

(Street)
BOSTON MA 02116

(City) (State) (Zip)
1. Name and Address of Reporting Person*
Third Rock Ventures GP II, L.P.

(Last) (First) (Middle)
29 NEWBURY STREET, 3RD FLOOR

(Street)
BOSTON MA 02116

(City) (State) (Zip)
1. Name and Address of Reporting Person*
TRV GP II, LLC

(Last) (First) (Middle)
29 NEWBURY STREET, 3RD FLOOR

(Street)
BOSTON MA 02116

(City) (State) (Zip)
1. Name and Address of Reporting Person*
LEVIN MARK J

(Last) (First) (Middle)
29 NEWBURY STREET, 3RD FLOOR

(Street)
BOSTON MA 02116

(City) (State) (Zip)
1. Name and Address of Reporting Person*
STARR KEVIN P

(Last) (First) (Middle)
29 NEWBURY STREET, 3RD FLOOR

(Street)
BOSTON MA 02116

(City) (State) (Zip)
1. Name and Address of Reporting Person*
TEPPER ROBERT I

(Last) (First) (Middle)
29 NEWBURY STREET, 3RD FLOOR

(Street)
BOSTON MA 02116

(City) (State) (Zip)
Explanation of Responses:
1. Distribution of shares in kind by Third Rock Ventures II, L.P. ("TRV") on a pro rata basis to its partners.
2. The shares are directly held by TRV. The general partner of TRV is Third Rock Ventures GP II, L.P. ("TRV GP"). The general partner of TRV GP is TRV GP II, LLC ("TRV GP LLC"). The individual managers of TRV GP LLC are Mark Levin ("Levin"), Kevin Starr ("Starr") and Dr. Robert Tepper ("Tepper") and, as such, each of TRV GP, TRV GP LLC, Levin, Starr and Tepper exercises shared voting and investment power over the shares held of record by TRV. Each of the Reporting Persons disclaims beneficial ownership of the shares except to the extent of their pecuniary interest therein, if any.
3. TRV GP received shares distributed in kind by TRV on a pro rata basis to its partners.
4. The shares are directly held by TRV GP. As such, each of TRV GP LLC, Levin, Starr and Tepper exercises shared voting and investment power over the shares held of record TRV GP. Each of the Reporting Persons disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any.
5. Distribution of shares in kind by TRV GP on a pro rata basis to its partners.
6. Levin received shares distributed in kind by TRV GP on a pro rata basis to its partners.
7. Starr received shares distributed in kind by TRV GP on a pro rata basis to its partners.
8. Tepper received shares distributed in kind by TRV GP on a pro rata basis to its partners.
Remarks:
/s/ Third Rock Ventures II, L.P. by Third Rock Ventures GP II, L.P. its general partner by TRV GP II, LLC its general partner 11/18/2015
/s/ Third Rock Ventures GP II, L.P. by TRV GP II, LLC its general partner 11/18/2015
/s/ TRV GP II, LLC 11/18/2015
/s/ Kevin Gillis by power of attorney for Mark Levin 11/18/2015
/s/ Kevin Gillis by power of attorney for Kevin Starr 11/18/2015
/s/ Kevin Gillis by power of attorney for Dr. Robert Tepper 11/18/2015
** 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 4 (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).
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