FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 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

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1. Name and Address of Reporting Person * VENROCK ASSOCIATES IV L P   2. Issuer Name and Ticker or Trading Symbol Bellerophon Therapeutics, Inc. [BLPH] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O VENROCK, 3340 HILLVIEW AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 09/05/2018 (Street) PALO ALTO, CA 94304 4. If Amendment, Date 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 (City) (State) (Zip) 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 09/05/2018(1)   P   50,000 A $ 0.8465 6,591,163 I By funds (2) Common Stock 09/06/2018   P   50,000 A $ 0.8419 6,641,163 I By funds (2) Common Stock 09/07/2018   P   60,000 A $ 0.8957 6,701,163 I By funds (3)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
VENROCK ASSOCIATES IV L P C/O VENROCK 3340 HILLVIEW AVENUE PALO ALTO, CA 94304		X
Venrock Healthcare Capital Partners III, L.P. C/O VENROCK 3340 HILLVIEW AVENUE PALO ALTO, CA 94304		X
VHCP Co-Investment Holdings III, LLC C/O VENROCK 3340 HILLVIEW AVENUE PALO ALTO, CA 94304		X
VHCP Management III, LLC C/O VENROCK 3340 HILLVIEW AVENUE PALO ALTO, CA 94304		X
Shah Nimish P C/O VENROCK 3340 HILLVIEW AVENUE PALO ALTO, CA 94304		X

Signatures

David L. Stepp, Authorized Signatory		09/07/2018
**Signature of Reporting Person		Date
David L. Stepp, Authorized Signatory		09/07/2018
**Signature of Reporting Person		Date
David L. Stepp, Authorized Signatory		09/07/2018
**Signature of Reporting Person		Date
David L. Stepp, Authorized Signatory		09/07/2018
**Signature of Reporting Person		Date
David L. Stepp, Attorney-in-fact		09/07/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	This Form 4 is the second of two Form 4s being filed to report the beneficial ownership of the following Reporting Persons: Venrock Associates IV, LP, Venrock Partners, LP, Venrock Entrepreneurs Fund IV, LP, Venrock Management IV, LLC, Venrock Partners Management, LLC, VEF Management IV, LLC, Venrock Healthcare Capital Partners II, LP, VHCP Management II, LLC, VHCP Co Investment Holdings II, LLC, Venrock Healthcare Capital Partners III, LP, VHCP Management III, LLC, VHCP Co Investment Holdings III, LLC, Bong Koh and Nimish Shah. Two Form 4s are being filed because each form can report a maximum of 10 reporting persons.
(2)	Consists of (i) 45,455 shares purchased by Venrock Healthcare Capital Partners III, LP and (ii) 4,545 shares purchased by VHCP Co-Investment Holdings III, LLC.
(3)	Consists of (i) 54,546 shares purchased by Venrock Healthcare Capital Partners III, LP and (ii) 5,454 shares purchased by VHCP Co-Investment Holdings III, LLC.

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