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 * LOWENTHAL ALBERT G   2. Issuer Name and Ticker or Trading Symbol OPPENHEIMER HOLDINGS INC [OPY] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director __X__ 10% Owner __X__ Officer (give title below) _____ Other (specify below) CEO (Last) (First) (Middle) 188 MAMARONECK RD 3. Date of Earliest Transaction (Month/Day/Year) 12/28/2017 (Street) SCARSDALE, NY 10583 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ 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 Class A non-voting common stock 12/28/2017   J   15,347 A (1) 3,156,540 I Phase II Financial LP (2) Class A non-voting common stock 12/28/2017   J   6,781 A (3) 3,163,321 I Phase II Financial LP (2)

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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

Restricted Class A non-voting common stock

(1)

12/28/2017

J

31,690

(1)

(1)

Class A non-voting common stock

15,347

(1)

80,795

D

Restricted Class A non-voting common stock

(3)

12/28/2017

J

13,795

(3)

(3)

Class A non-voting common stock

6,781

(3)

67,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
LOWENTHAL ALBERT G 188 MAMARONECK RD SCARSDALE, NY 10583	X	X	CEO

Signatures

/s/ A.G. Lowenthal		12/29/2017
**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)	The transaction describes the vesting of 31,690 shares of Restricted Class A non-voting common stock which were awarded on January 29, 2015 and vested on accelerated basis from January 28, 2018 to December 28th, 2017 of which 15,347 Class A non-voting common shares were converted and 16,343 shares were forfeited.
(2)	Phase II Financial LP is a NY partnership of which Mr. Lowenthal is sole general partner.
(3)	The transaction describes the vesting of 13,795 shares of Restricted Class A non-voting common stock which were awarded on February 26, 2015 and vested on accelerated basis from February 25, 2018 to December 28th, 2017 of which 6,781 Class A non-voting common shares were converted and 7,014 shares were forfeited.

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