SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM N-PX

                     ANNUAL REPORT OF PROXY VOTING RECORD OF
                   REGISTERED MANAGEMENT INVESTMENT COMPANIES


                Investment Company Act file number: 811-07391

                        AB Unconstrained Bond Fund, Inc.
               (Exact name of registrant as specified in charter)

                             AllianceBernstein L.P.
              1345 Avenue of the Americas, New York, New York 10105
               (Address of Principal Executive Office) (Zip Code)

               Registrant's Telephone Number, including Area Code:
                                 (800) 221-5672

                                 EMILIE D. WRAPP
                             AllianceBernstein L.P.
                           1345 Avenue of the Americas
                            New York, New York 10105
                     (Name and address of agent for service)

                          Copies of communications to:
                                 Paul M. Miller
                              Seward & Kissel LLP
                               901 K Street, N.W.
                                   Suite 800
                             Washington, D.C. 20001

                       Date of fiscal year end: October 31

             Date of reporting period: July 1, 2017 - June 30, 2018




Item 1.  Proxy Voting Record.

******************************* FORM N-PX REPORT *******************************

ICA File Number: 811-07391
Reporting Period: 07/01/2017 - 06/30/2018
AB Unconstrained Bond Fund, Inc.









======================= AB Unconstrained Bond Fund, Inc. =======================


AVAYA INC

Ticker:       AV             Security ID:  053499AJ8
Meeting Date: NOV 24, 2017   Meeting Type: Written Consent
Record Date:  AUG 25, 2017

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Vote On The Plan                        For       For          Management


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CARRIZO OIL & GAS, INC.

Ticker:       CRZO           Security ID:  144577103
Meeting Date: MAY 22, 2018   Meeting Type: Annual
Record Date:  MAR 23, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director S.P. Johnson, IV         For       For          Management
1.2   Elect Director Steven A. Webster        For       For          Management
1.3   Elect Director F. Gardner Parker        For       For          Management
1.4   Elect Director Aldrich Sevilla-Sacasa   For       For          Management
1.5   Elect Director Thomas L. Carter, Jr.    For       For          Management
1.6   Elect Director Robert F. Fulton         For       For          Management
1.7   Elect Director Roger A. Ramsey          For       For          Management
1.8   Elect Director Frank A. Wojtek          For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Approve Issuance of Shares for a        For       For          Management
      Private Placement
4     Ratify Ernst & Young LLP as Auditors    For       For          Management


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ENDO INTERNATIONAL PLC

Ticker:       ENDP           Security ID:  G30401106
Meeting Date: JUN 07, 2018   Meeting Type: Annual
Record Date:  APR 13, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Roger H. Kimmel          For       For          Management
1b    Elect Director Paul V. Campanelli       For       For          Management
1c    Elect Director Shane M. Cooke           For       For          Management
1d    Elect Director Nancy J. Hutson          For       For          Management
1e    Elect Director Michael Hyatt            For       For          Management
1f    Elect Director Sharad S. Mansukani      For       For          Management
1g    Elect Director William P. Montague      For       For          Management
1h    Elect Director Todd B. Sisitsky         For       For          Management
2     Approve PricewaterhouseCoopers LLP as   For       For          Management
      Auditors and Authorize Board to Fix
      Their  Remuneration
3     Advisory Vote to Ratify Named           For       Against      Management
      Executive Officers' Compensation
4     Amend Omnibus Stock Plan                For       For          Management
5     Authorize Issue of Equity with          For       For          Management
      Pre-emptive Rights
6     Authorize Issue of Equity without       For       For          Management
      Pre-emptive Rights


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GOLDEN ENERGY OFFSHORE AS

Ticker:                      Security ID:  R2R70WAA0
Meeting Date: DEC 19, 2017   Meeting Type: Bondholder
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Summons                         For       For          Management
2     Approve Agenda                          For       For          Management
3     Elect Minutes keepers                   For       For          Management
4     Adopt Proposal                          For       For          Management


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GOLDEN ENERGY OFFSHORE SERVICES AS

Ticker:                      Security ID:  R2R712107
Meeting Date: MAY 31, 2018   Meeting Type: Annual
Record Date:

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Open Meeting; Registration of           None      None         Management
      Attending Shareholders and Proxies
2     Elect Chairman of Meeting; Designate    For       Abstain      Management
      Inspector(s) of Minutes of Meeting
3     Approve Notice of Meeting and Agenda    For       Abstain      Management
4     Accept Financial Statements and         For       Abstain      Management
      Statutory Reports
5     Approve Remuneration of Auditors        For       Abstain      Management
6     Approve Remuneration of Directors in    For       Abstain      Management
      the Amount of EUR 7,000 for Per Ivar
      Fagervoll, and EUR 4,000 for Polymnia
      Lazopoulou and Kyriakos Zarvanos Each
7     Approve Stock Option Plan for Board of  For       Abstain      Management
      Directors and Key Employees


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GRAY TELEVISION, INC.

Ticker:       GTN            Security ID:  389375106
Meeting Date: MAY 07, 2018   Meeting Type: Annual
Record Date:  MAR 08, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Hilton H. Howell, Jr.    For       For          Management
1.2   Elect Director Howell W. Newton         For       For          Management
1.3   Elect Director Richard L. Boger         For       For          Management
1.4   Elect Director T.L. (Gene) Elder        For       For          Management
1.5   Elect Director Luis A. Garcia           For       For          Management
1.6   Elect Director Richard B. Hare          For       For          Management
1.7   Elect Director Robin R. Howell          For       For          Management
1.8   Elect Director Elizabeth R. (Beth)      For       For          Management
      Neuhoff
1.9   Elect Director Hugh E. Norton           For       For          Management
2     Increase Authorized Common Stock        For       For          Management
3     Ratify RSM US LLP as Auditors           For       For          Management
4     Amend Bylaws                            None      For          Shareholder


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HORIZON PHARMA PLC

Ticker:       HZNP           Security ID:  G4617B105
Meeting Date: MAY 03, 2018   Meeting Type: Annual
Record Date:  MAR 23, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director William F. Daniel        For       For          Management
1b    Elect Director H. Thomas Watkins        For       For          Management
1c    Elect Director Pascale Witz             For       For          Management
2     Approve PricewaterhouseCoopers LLP as   For       For          Management
      Auditors and Authorize Board to Fix
      Their  Remuneration
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Advisory Vote on Say on Pay Frequency   One Year  One Year     Management
5     Authorize Share Repurchase up to 10     For       For          Management
      Percent of Issued Share Capital
6     Amend Omnibus Stock Plan                For       For          Management


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LAUREATE EDUCATION INC.

Ticker:       LAUR           Security ID:  518613203
Meeting Date: MAY 23, 2018   Meeting Type: Annual
Record Date:  MAR 28, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Douglas L. Becker        For       For          Management
1.2   Elect Director Brian F. Carroll         For       Withhold     Management
1.3   Elect Director Andrew B. Cohen          For       Withhold     Management
1.4   Elect Director William L. Cornog        For       Withhold     Management
1.5   Elect Director Pedro del Corro          For       Withhold     Management
1.6   Elect Director Michael J. Durham        For       Withhold     Management
1.7   Elect Director Kenneth W. Freeman       For       Withhold     Management
1.8   Elect Director George Munoz             For       Withhold     Management
1.9   Elect Director Judith Rodin             For       Withhold     Management
1.10  Elect Director Eilif Serck-Hanssen      For       For          Management
1.11  Elect Director Ian K. Snow              For       Withhold     Management
1.12  Elect Director Steven M. Taslitz        For       Withhold     Management
1.13  Elect Director Quentin Van Doosselaere  For       Withhold     Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
4     Advisory Vote on Say on Pay Frequency   One Year  One Year     Management


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NEXSTAR MEDIA GROUP, INC.

Ticker:       NXST           Security ID:  65336K103
Meeting Date: JUN 06, 2018   Meeting Type: Annual
Record Date:  APR 23, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Perry A. Sook            For       For          Management
1.2   Elect Director Geoff Armstrong          For       For          Management
1.3   Elect Director Jay M. Grossman          For       For          Management
2     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       Against      Management
      Executive Officers' Compensation


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OASIS PETROLEUM INC.

Ticker:       OAS            Security ID:  674215108
Meeting Date: MAY 03, 2018   Meeting Type: Annual
Record Date:  MAR 08, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director William J. Cassidy       For       For          Management
1.2   Elect Director Taylor L. Reid           For       For          Management
1.3   Elect Director Bobby S. Shackouls       For       For          Management
2     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
4     Amend Omnibus Stock Plan                For       For          Management
5     Increase Authorized Common Stock        For       For          Management


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PEABODY ENERGY CORPORATION

Ticker:       BTU            Security ID:  704551100
Meeting Date: MAY 10, 2018   Meeting Type: Annual
Record Date:  MAR 19, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1a    Elect Director Bob Malone               For       For          Management
1b    Elect Director Nicholas J. Chirekos     For       For          Management
1c    Elect Director Stephen E. Gorman        For       For          Management
1d    Elect Director Glenn L. Kellow          For       For          Management
1e    Elect Director Joe W. Laymon            For       For          Management
1f    Elect Director Teresa S. Madden         For       For          Management
1g    Elect Director Kenneth W. Moore         For       For          Management
1h    Elect Director Michael W. Sutherlin     For       For          Management
1i    Elect Director Shaun A. Usmar           For       For          Management
2     Advisory Vote to Ratify Named           For       Against      Management
      Executive Officers' Compensation
3     Advisory Vote on Say on Pay Frequency   One Year  One Year     Management
4     Ratify Ernst & Young LLP as Auditors    For       For          Management


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RESOLUTE FOREST PRODUCTS INC.

Ticker:       RFP            Security ID:  76117W109
Meeting Date: MAY 25, 2018   Meeting Type: Annual
Record Date:  MAR 29, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director Randall C. Benson        For       For          Management
1.2   Elect Director Jennifer C. Dolan        For       For          Management
1.3   Elect Director Richard D. Falconer      For       For          Management
1.4   Elect Director Jeffrey A. Hearn         For       For          Management
1.5   Elect Director Yves Laflamme            For       For          Management
1.6   Elect Director Bradley P. Martin        For       For          Management
1.7   Elect Director Alain Rheaume            For       For          Management
1.8   Elect Director Michael S. Rousseau      For       For          Management
2     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
3     Advisory Vote to Ratify Named           For       Abstain      Management
      Executive Officers' Compensation


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SANDRIDGE ENERGY, INC.

Ticker:       SD             Security ID:  80007P869
Meeting Date: JUN 19, 2018   Meeting Type: Proxy Contest
Record Date:  APR 20, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
      Management Universal Proxy (White       None
      Proxy Card)
1a    Elect Director Sylvia K. Barnes         For       For          Management
1b    Elect Director Kenneth H. Beer          For       For          Management
1c    Elect Director Michael L. Bennett       For       For          Management
1d    Elect Director William (Bill) M.        For       For          Management
      Griffin, Jr.
1e    Elect Director David J. Kornder         For       For          Management
1f    Elect Director Bob G. Alexander         None      Withhold     Shareholder
1g    Elect Director Jonathan Christodoro     Withhold  Withhold     Shareholder
1h    Elect Director Nancy Dunlap             None      Withhold     Shareholder
1i    Elect Director Jonathan Frates          Withhold  Withhold     Shareholder
1j    Elect Director Nicholas Graziano        Withhold  Withhold     Shareholder
1k    Elect Director John "Jack" Lipinski     None      Withhold     Shareholder
1l    Elect Director Randolph C. Read         None      Withhold     Shareholder
2     Amend Shareholder Rights Plan (Poison   For       Against      Management
      Pill)
3     Ratify PricewaterhouseCoopers LLP as    For       For          Management
      Auditors
4     Advisory Vote to Ratify Named           For       Against      Management
      Executive Officers' Compensation
#     Proposal                                Diss Rec  Vote Cast    Sponsor
      Dissident Proxy (Gold Proxy Card)       None
1.1   Elect Director Jonathan Frates          For       Did Not Vote Shareholder
1.2   Elect Director Nicholas Graziano        For       Did Not Vote Shareholder
1.3   Elect Director John "Jack" Lipinski     For       Did Not Vote Shareholder
1.4   Elect Director Bob G. Alexander         For       Did Not Vote Shareholder
1.5   Elect Director Randolph C. Read         For       Did Not Vote Shareholder
1.6   Elect Director Jonathan Christodoro     For       Did Not Vote Shareholder
1.7   Elect Director Nancy Dunlap             For       Did Not Vote Shareholder
2     Amend Shareholder Rights Plan (Poison   Against   Did Not Vote Management
      Pill)
3     Ratify PricewaterhouseCoopers LLP as    For       Did Not Vote Management
      Auditors
4     Advisory Vote to Ratify Named           Against   Did Not Vote Management
      Executive Officers' Compensation


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WHITING PETROLEUM CORPORATION

Ticker:       WLL            Security ID:  966387102
Meeting Date: NOV 08, 2017   Meeting Type: Special
Record Date:  SEP 18, 2017

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1     Approve Reverse Stock Split and Reduce  For       For          Management
      Shares Authorized


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WHITING PETROLEUM CORPORATION

Ticker:       WLL            Security ID:  966387409
Meeting Date: MAY 01, 2018   Meeting Type: Annual
Record Date:  MAR 09, 2018

#     Proposal                                Mgt Rec   Vote Cast    Sponsor
1.1   Elect Director William N. Hahne         For       For          Management
1.2   Elect Director Bradley J. Holly         For       For          Management
2     Advisory Vote to Ratify Named           For       For          Management
      Executive Officers' Compensation
3     Ratify Deloitte & Touche LLP as         For       For          Management
      Auditors

========== END NPX REPORT




                                   SIGNATURES

     Pursuant to the requirements of the Investment Company Act of 1940, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.


                              Registrant: AB Unconstrained Bond Fund, Inc.



                              By: Robert M. Keith*
                                  -----------------------
                                  Chief Executive Officer



                              Date:  August 31, 2018



*By: /s/ Nancy E. Hay
     -------------------
         Nancy E. Hay
         (Attorney-in-fact)



                               POWER OF ATTORNEY
                               -----------------

            KNOW ALL PERSONS BY THESE PRESENTS, that the person whose signature
appears below hereby revokes all prior powers granted by the undersigned to the
extent inconsistent herewith and constitutes and appoints Robert M. Keith,
Emilie D. Wrapp, Eric C. Freed, Nancy E. Hay and Stephen J. Laffey and each of
them, to act severally as attorney-in-fact and agent, with power of substitution
and resubstitution, for the undersigned in any and all capacities, solely for
the purpose of signing the respective Registration Statements, and any
amendments thereto, on Form N-1A and any other filings of:

-AB Bond Fund, Inc.
-AB Cap Fund, Inc.
-AB Core Opportunities Fund, Inc.
-AB Corporate Shares
-AB Discovery Growth Fund, Inc.
-AB Equity Income Fund, Inc.
-AB Fixed-Income Shares, Inc.
-AB Global Bond Fund, Inc.
-AB Global Real Estate Investment Fund, Inc.
-AB Global Risk Allocation Fund, Inc.
-AB High Income Fund, Inc.
-AB Institutional Funds, Inc.
-AB Large Cap Growth Fund, Inc.
-AB Municipal Income Fund, Inc.
-AB Municipal Income Fund II
-AB Relative Value Fund, Inc.
-AB Sustainable Global Thematic Fund, Inc.
-AB Sustainable International Thematic Fund, Inc.
-AB Trust
-AB Unconstrained Bond Fund, Inc.
-AB Variable Products Series Fund, Inc.
-The AB Portfolios
-Sanford C. Bernstein Fund II, Inc.

and filing the same, with exhibits thereto, and other documents in connection
therewith, with the Securities and Exchange Commission, hereby ratifying and
confirming all that said attorneys-in-fact, or their substitute or substitutes,
may do or cause to be done by virtue hereof.



                                           /s/ Robert M. Keith
                                           ------------------------
                                               Robert M. Keith

Dated: May 3, 2018