13G Filing: Sabby Capital and Gevo Inc. (GEVO)

Page 4 of 9 – SEC Filing

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CUSIP No.
3743963071.
NAME OF REPORTING PERSONSHal Mintz2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) [_]

(b) [X]

3.
SEC USE ONLY4.
CITIZENSHIP OR PLACE OF ORGANIZATIONUSANUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

5.
SOLE VOTING POWER06.
SHARED VOTING POWER 1,088,3477.
SOLE DISPOSITIVE POWER08.
SHARED DISPOSITIVE POWER 1,088,3479.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,088,34710.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES (SEE INSTRUCTIONS)

[_]11.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)4.9912.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

IN?

CUSIP No.
374396307

Item 1.
(a).
Name of Issuer:Gevo, Inc.

(b).
Address of issuer’s principal executive offices:345 Inverness Drive South
Building C, Suite 310
Englewood, CO 80112

Item 2.
(a).
Name of person filing:Sabby Healthcare Master Fund, Ltd.
Sabby Volatility Warrant Master Fund, Ltd.
Sabby Management, LLC
Hal Mintz