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

Gevo Inc. (NASDAQ:GEVO): Hal Mintz’s Sabby Capital filed an amended 13D.

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You can access the original SEC filing by clicking here.

Ownership Summary Table

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
Sabby Healthcare Master Fund, Ltd 0 657,500 0 657,500 657,500 3.01 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 374396307 1. NAME OF REPORTING PERSONS Sabby Volatility Warrant Master Fund, Ltd. 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 Cayman Islands NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 5. SOLE VOTING POWER 0 6. SHARED VOTING POWER 657,500 7. SOLE DISPOSITIVE POWER 0 8. SHARED DISPOSITIVE POWER 657,500 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 657,500 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 3.01 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) CO CUSIP No. 374396307 1. NAME OF REPORTING PERSONS Sabby Management, LLC 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 Delaware, USA NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 5. SOLE VOTING POWER 0 6. SHARED VOTING POWER 1,088,347 7. SOLE DISPOSITIVE POWER 0 8. SHARED DISPOSITIVE POWER 1,088,347 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,088,347 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 4.99 12. TYPE OF REPORTING PERSON (SEE INSTRUCTIONS) OO CUSIP No. 374396307 1. NAME OF REPORTING PERSONS Hal Mintz 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 USA NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH 5. SOLE VOTING POWER 0 6. SHARED VOTING POWER 1,088,347 7. SOLE DISPOSITIVE POWER 0 8. SHARED DISPOSITIVE POWER 1,088,347 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,088,347 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS) 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 4.99 12. 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 (b). Address or principal business office or, if none, residence Sabby Healthcare Master Fund, Ltd. c o Ogier Fiduciary Services (Cayman) Limited 89 Nexus Way, Camana Bay Grand Cayman KY1-9007 Cayman Islands Sabby Volatility Warrant Master Fund, Ltd. c o Ogier Fiduciary Services (Cayman) Limited 89 Nexus Way, Camana Bay Grand Cayman KY1-9007 Cayman Islands Sabby Management, LLC 10 Mountainview Road, Suite 205 Upper Saddle River, New Jersey 07458 Hal Mintz c o Sabby Management, LLC 10 Mountainview Road, Suite 205 Upper Saddle River, New Jersey 07458 (c). Citizenship Sabby Healthcare Master Fund, Ltd. – Cayman Islands Sabby Volatility Warrant Master Fund, Ltd. – Cayman Islands Sabby Management, LLC – Delaware, USA Hal Mintz – USA (d). Title of class of securities Common stock (the Common Stock) (e). CUSIP No. 374396307 Item 3. If This Statement is filed pursuant to Section 240.13d-1(b) or 240.13d-2(b), or(c), check whether the person filing is a (a) Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o). (b) Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c). (c) Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c). (d) Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8). (e) An investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E) (f) An employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F) (g) A parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G) (h) A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C.1813) (i) A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3) (j) A non-U.S. institution in accordance with Section 240.13d-1(b)(1)(ii)(J) (k) Group, in accordance with Section 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S.institution in accordance with Section 240.13d-1(b)(1)(ii)(J), please specify the type of institution Item 4. Ownership. Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1. (a) Amount beneficially owned Sabby Healthcare Master Fund, Ltd. – 657,500 Sabby Volatility Warrant Master Fund, Ltd. – 657,500 Sabby Management, LLC – 1,088,347 Hal Mintz – 1,088,347 (b) Percent of class Sabby Healthcare Master Fund, Ltd. – 3.01%
Sabby Volatility Warrant Master Fund, Ltd 0 657,500 0 657,500 657,500
Sabby Management 0 1,088,347 0 1,088,347 1,088,347
Hal Mintz 0 1,088,347 0 1,088,347 1,088,347

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Page 1 of 9 – SEC Filing

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, DC 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No.1)*

Gevo, Inc.
(Name of Issuer)

Common Stock
(Title of Class of Securities)

374396307
(CUSIP Number)

December 31, 2017
(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:
[_] Rule 13d-1(b)

[X] Rule 13d-1(c)

[_] Rule 13d-1(d)

__________
*The remainder of this cover page shall be filled out for a reporting
person’s initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which
would alter the disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not
be deemed to be filed for the purpose of Section 18 of the Securities
Exchange Act of 1934 (Act) or otherwise subject to the liabilities of that
section of the Act but shall be subject to all other provisions of the Act
(however, see the Notes).
?
CUSIP No.
374396307

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Page 2 of 9 – SEC Filing

1.
NAME OF REPORTING PERSONSSabby Healthcare Master Fund, Ltd.2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) [_]

(b) [X]

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

5.
SOLE VOTING POWER06.
SHARED VOTING POWER657,5007.
SOLE DISPOSITIVE POWER08.
SHARED DISPOSITIVE POWER657,5009.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON657,50010.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES (SEE INSTRUCTIONS)

[_]11.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)3.0112.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

CO?
CUSIP No.
3743963071.
NAME OF REPORTING PERSONSSabby Volatility Warrant Master Fund, Ltd.2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) [_]

(b) [X]

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

5.
SOLE VOTING POWER

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Page 3 of 9 – SEC Filing

6.
SHARED VOTING POWER657,5007.
SOLE DISPOSITIVE POWER08.
SHARED DISPOSITIVE POWER657,5009.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON657,50010.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
SHARES (SEE INSTRUCTIONS)

[_]11.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)3.0112.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

CO?

CUSIP No.
3743963071.
NAME OF REPORTING PERSONSSabby Management, LLC2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

(a) [_]

(b) [X]

3.
SEC USE ONLY4.
CITIZENSHIP OR PLACE OF ORGANIZATIONDelaware, USANUMBER 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)

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Page 4 of 9 – SEC Filing

12.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

OO
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

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Page 5 of 9 – SEC Filing

Sabby Healthcare Master Fund, Ltd.
c/o Ogier Fiduciary Services (Cayman) Limited
89 Nexus Way, Camana Bay
Grand Cayman KY1-9007
Cayman Islands

Sabby Volatility Warrant Master Fund, Ltd.
c/o Ogier Fiduciary Services (Cayman) Limited
89 Nexus Way, Camana Bay
Grand Cayman KY1-9007
Cayman Islands

Sabby Management, LLC
10 Mountainview Road, Suite 205
Upper Saddle River, New Jersey 07458

Hal Mintz
c/o Sabby Management, LLC
10 Mountainview Road, Suite 205
Upper Saddle River, New Jersey 07458(c).
Citizenship:Sabby Healthcare Master Fund, Ltd. – Cayman Islands
Sabby Volatility Warrant Master Fund, Ltd. – Cayman Islands
Sabby Management, LLC – Delaware, USA
Hal Mintz – USA(d).
Title of class of securities:Common stock (the Common Stock)

(e).
CUSIP No.:374396307

Item 3.
If This Statement is filed pursuant to Section 240.13d-1(b) or 240.13d-2(b),
or(c), check whether the person filing is a

(a)
[_]
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)
[_]
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)
[_]
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)
[_]
Investment company registered under section 8 of the Investment Company Act
of 1940 (15 U.S.C. 80a-8).

(e)
[_]
An investment adviser in accordance with Section 240.13d-1(b)(1)(ii)(E);

(f)
[_]
An employee benefit plan or endowment fund in accordance with Section
240.13d-1(b)(1)(ii)(F);

(g)
[_]
A parent holding company or control person in accordance with Section
240.13d-1(b)(1)(ii)(G);

(h)
[_]
A savings association as defined in Section 3(b) of the Federal Deposit
Insurance Act (12 U.S.C.1813);

(i)
[_]
A church plan that is excluded from the definition of an investment company
under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C.
80a-3);

(j)
[_]
A non-U.S. institution in accordance with Section 240.13d-1(b)(1)(ii)(J);

(k)
[_]
Group, in accordance with Section 240.13d-1(b)(1)(ii)(K). If filing as a
non-U.S.institution in accordance with Section 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:

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Page 6 of 9 – SEC Filing

( (c)
Number of shares as to which the person has:

Sabby Healthcare Master Fund, Ltd.

( (i)
Sole power to vote or to direct the vote
0
,( (ii)
Shared power to vote or to direct the vote
657,500
,( (iii)
Sole power to dispose or to direct the disposition of
0
,( (iv)
Shared power to dispose or to direct the disposition of
657,500
.Sabby Volatility Warrant Master Fund, Ltd.

( (i)
Sole power to vote or to direct the vote
0
,( (ii)
Shared power to vote or to direct the vote
657,500
,( (iii)
Sole power to dispose or to direct the disposition of
0
,( (iv)
Shared power to dispose or to direct the disposition of
657,500
.Sabby Management, LLC

(i)
Sole power to vote or to direct the vote
0
,( (ii)
Shared power to vote or to direct the vote
1,088,347
,( (iii)
Sole power to dispose or to direct the disposition of
0
,( (iv)
Shared power to dispose or to direct the disposition of
1,088,347
.Hal Mintz

( (i)
Sole power to vote or to direct the vote
0
,( (ii)
Shared power to vote or to direct the vote
1,088,347
,

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Page 7 of 9 – SEC Filing

( (iv)
Shared power to dispose or to direct the disposition of
1,088,347
.As calculated in accordance with Rule 13d-3 of the Securities Exchange Act of
1934, as amended, (i) Sabby Healthcare Master Fund, Ltd. and Sabby
Volatility Master Fund, Ltd. beneficially own 657,500 and 657,500 shares of
the Issuer’s common stock (“Common Stock”), respectively, representing
approximately 3.01% and 3.01% of the Common Stock, respectively, and
(ii) Sabby Management, LLC and Hal Mintz each beneficially own 1,088,347
shares of the Common Stock, representing approximately 4.99% of the Common
Stock. Sabby Management, LLC and Hal Mintz do not directly own any shares of
Common Stock, but each indirectly owns 1,088,347 shares of
Common Stock. Sabby Management, LLC, a Delaware limited liability company,
indirectly owns 1,088,347 shares of Common Stock because it serves as the
investment manager of Sabby Healthcare Master Fund, Ltd. and Sabby
Volatility Warrant Master Fund, Ltd., Cayman Islands companies. Mr. Mintz
indirectly owns 1,088,347 shares of Common Stock in his capacity as
manager of Sabby Management, LLC.

Item 5.
Ownership of Five Percent or Less of a Class.

If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more
than five percent of the class of securities, check the following [X].

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Page 8 of 9 – SEC Filing

Not applicable

Item 7.
Identification and Classification of the Subsidiary Which Acquired the
Security Being Reported on by the Parent Holding Company or Control Person.Not applicable

Item 8.
Identification and Classification of Members of the Group.Not applicable

Item 9.
Notice of Dissolution of Group.Not applicable

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Item 10.
Certification.By signing below I certify that, to the best of my knowledge and belief, the
securities referred to above were not acquired and are not held for the
purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.

?
SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief,
I certify that the information set forth in this statement is true, complete
and correct.

January 8, 2018

(Date)Sabby Healthcare Master Fund, Ltd.

By: /s/ Harry Thompson
Name: Harry Thompson
Title: Authorized Person of TDF Management Ltd.,
a Director

Sabby Volatility Warrant Master Fund, Ltd.

By: /s/ Harry Thompson
Name: Harry Thompson
Title: Authorized Person of TDF Management Ltd.,
a Director

Sabby Management, LLC*

By: /s/ Robert Grundstein
Name: Robert Grundstein
Title: Chief Operating Officer

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Page 9 of 9 – SEC Filing

/s/ Hal Mintz
Hal Mintz

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