13G Filing: Vertex One Asset Management and Bonanza Creek Energy, Inc. (BCEI)

Cusip No. 097793103

13G

Page 2 of 9 pages

1.

Names of Reporting Persons.
I.R.S. Identification Nos. of above persons (entities only).

John Thiessen

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

Canada

Number of Shares Beneficially Owned by Each Reporting Person With

5.

Sole Voting Power

6.

Shared Voting Power

2,887,664

7.

Sole Dispositive Power

8.

Shared Dispositive Power

2,887,664

9.

Aggregate Amount Beneficially Owned by Each Reporting Person

2,887,664 shares of Common Stock

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

[  ]

11.

Percent of Class Represented by Amount in Row (9)

5.8%

12.

Type of Reporting Person (See Instructions)

IN