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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-top: Black 0.5pt solid"><B>UNITED
STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>Form
8-K</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>CURRENT REPORT </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Pursuant to Section&nbsp;13 or 15(d)
of the </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Securities Exchange Act of 1934 </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Date of Report (Date of earliest event
reported): </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">May  18, 2012</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Rio Bravo Oil, Inc. </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid"><B>(Exact
name of registrant) </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
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    <TD STYLE="width: 32%; text-align: center">Nevada</TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 32%; text-align: center">000-54564</TD>
    <TD STYLE="width: 2%">&nbsp;</TD>
    <TD STYLE="width: 32%; text-align: center">42-1771917</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-weight: bold; text-align: center">(State of Incorporation)</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: center">(Commission File <BR>
Number)</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-weight: bold; text-align: center">(I.R.S. Employer <BR>
Identification Number)</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">5858 Westheimer, Suite 699</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Houston, TX 77057</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Address of principal executive offices
and zip code)</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">713-787-9060</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(Registrant&rsquo;s telephone number,
including area code) </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: black 1pt solid">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425) </FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: -0.25in">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Soliciting material pursuant to Rule 14a-12 under the Exchange Act
(17 CFR 240.14a-12) </FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b)) </FONT></TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.25in; text-indent: -0.25in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in"><FONT STYLE="font: 10pt Wingdings">&uml;</FONT></TD><TD><FONT STYLE="font-family: Times New Roman, Times, Serif">Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c)) </FONT></TD></TR></TABLE>



<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>Item&nbsp;1.01. Entry into a Material Definitive Agreement</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Numa Luling Asset Purchase Agreement.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">On June 1, 2012, Rio Bravo Oil, Inc. (&ldquo;Rio
Bravo&rdquo; or the &ldquo;Company&rdquo;) entered into an Asset Purchase Agreement (the &ldquo;Agreement&rdquo;) by and between
the Company and Numa Luling, LLC, a Texas limited liability company (&ldquo;Numa Luling&rdquo;). Pursuant to the Agreement, the
Company acquired a twenty-five percent (25%) working interest <FONT STYLE="font-size: 10pt">in and to various oil and gas leases
and all wells, equipment, agreements and personal property associated therewith located in Caldwell and Guadalupe Counties, Texas,
as more particularly described in the Agreement (&ldquo;Working Interest&rdquo;)</FONT>. The Company also acquired all of Numa
Luling&rsquo;s books and records, contract rights and other assets associated with the Working Interest. The aforementioned property
is hereinafter collectively referred to as the &ldquo;Numa Luling Assets&quot;. The Company only assumed those liabilities of Numa
Luling which were directly related to the Working Interest, as more particularly described in the Agreement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">In full consideration for the purchase
by the Company of the Numa Luling Assets, the Company delivered to Numa Luling 3,250,000 shares of the Company&rsquo;s Series B
Convertible Preferred Stock (&ldquo;Series B Preferred Shares&rdquo;) valued at $1.00 per share. The Series B Preferred Shares
are convertible in accordance with the Certificate of Designations with respect to such Series B Preferred Shares.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">A copy of the Agreement is attached to
this Report as Exhibit 2.1</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Eagle Ford Oil Co., Inc. Purchase and
Sale Agreement.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">On May 25, 2012, the Company entered
into a Purchase and Sale Agreement (the &ldquo;Eagle Ford Agreement&rdquo;) by and between a wholly-owned Subsidiary of the
Company and Eagle Ford Oil Co., Inc. (&ldquo;Eagle Ford&rdquo;). Pursuant to the Eagle Ford Agreement, the Company acquired
an 80% working interest (20% carried interest is retained by Seller) in the Caltex leasehold from Eagle Ford (shallow and
deeper rights associated with the Luling Edwards Fields leasehold) for $2,225,000. The purchase price was payable $2,000,000
cash at the Closing and delivery of the Company&rsquo;s promissory note in the amount of $225,000 due and payable on December
31, 2012. In addition, the Company assumed certain liabilities of Eagle Ford in the aggregate amount of $1,295,000.
Certain former owners of Pan American Oil, LLC held an interest in the Eagle Ford assets which the Company purchased.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">A copy of the Eagle Ford Agreement is attached
to this Report as Exhibit 2.2</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify; text-indent: 0"><B>Employee,</B> <B>Director
and Consultant Stock Plan</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">On May 29, 2012, the Company&rsquo;s
board of directors approved the Rio Bravo Oil, Inc. 2012 Employee, Director and Consultant Stock Plan (&ldquo;Plan&rdquo;).
The Plan is administered by the Company&rsquo;s board of directors and provides for qualified and non-qualified stock
options, stock grants and stock appreciation rights to be granted at the discretion of the board of directors at a price not
less than the then Fair Market Value of the Company&rsquo;s common shares. The plan further provides that the shares which
are the subject of the Plan shall not exceed fifteen percent (15%) of the Company&rsquo;s issued and outstanding shares from
time to time, subject to an annual adjustment. The Plan also incorporates certain &ldquo;Change in Control&rdquo;
provisions.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">A copy of the Plan is attached to this
Report as Exhibit 2.5.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item 2.01 Completion of Acquisition
or Disposition of Assets.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">See Item 1.01 Entry into a Material Definitive
Agreement, above.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item 2.03 Creation of a Direct Financial
Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>$750,000 Convertible Debenture</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">On May 25, 2012, the Company issued a $750,000
face amount 3% Subordinated Convertible Debenture (&ldquo;Debenture&rdquo;) to Del Mar Financial S.a r.l. in exchange for a cash
payment in the amount of $750,000. The Debenture is due and payable on or before April 30, 2017 and bears interest at a rate of
three percent (3%) per annum, payable quarterly in arrears. The Debenture is convertible into shares of Company Common Stock at
any time by the holder at a conversion price of $0.75 per share.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">A copy of the 3% Subordinated Convertible
Debenture is attached to this Report as Exhibit 2.3.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>$300,000 Promissory Note</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">On May 21, 2012, the Company issued a Promissory
Note in the face amount of $300,000 in favor of Virtus Trust Limited as Trustee of the Hillside Ventures Investment Trust B (&ldquo;Note&rdquo;).
The Note is due and payable on or before December 31, 2012 (or upon the Company raising additional capital in the amount of at
least $1,500,000) and bears interest at a rate of six percent (6%) per annum.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">A copy of the Note is attached to this
Report as Exhibit 2.4.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item 3.02 Unregistered Sales of Equity
Securities.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">On June 1, 2012, the Company entered into
an Asset Purchase Agreement with Numa Luling, LLC pursuant to which the Company (a) exchanged 3,200,000 shares of its Series B
Convertible Preferred Stock valued at $1.00 per share for certain designated assets of Numa Luling, (b) assumed certain liabilities
of Numa Luling associated with the Numa Luling Assets. See Item 1.01 Entry into a Material Definitive Agreement, above.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item 5.03 Amendments to Articles of
Incorporation or Bylaws; Change in Fiscal Year.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">On April 4, 2012, the Company&rsquo;s Board
of Directors approved the creation of Series B Convertible Preferred Stock and designated 5,000,000 shares of the Company&rsquo;s
authorized Preferred Stock par value $0.001 as Series B Convertible Preferred Stock par value $0.001 (&ldquo;Series B Preferred
Stock). The Series B Preferred Stock has a dividend preference and liquidation preference over the Company&rsquo;s Common Stock.
The Certificate of Designation for Series B Convertible Preferred Stock par value $0.001 was filed with the Nevada Secretary of
State on May 18, 2012.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">Each share of Series B Preferred Stock
may be converted by any holder thereof, without any further consideration, at any time, into a number of shares of Company Common
Stock calculated by dividing the number of shares of Series B Preferred Stock being converted by .75 (the &ldquo;Conversion Rate&rdquo;).
The Conversion Rate is subject to adjustment as detailed in the Certificate of Designation. Further, each share of Series B Preferred
Stock shall be automatically converted into shares of the Company&rsquo;s Common Stock at the Conversion Rate upon the occurrence
of any of the following events:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 1in; text-align: justify">&nbsp;</P>

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<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in">(a)</TD><TD STYLE="text-align: justify">The shares of the Corporation&rsquo;s Common Stock shall trade at a price of over $1.75 per share
(as adjusted) for a period in excess of thirty (30) consecutive trading days and the shares of the Company&rsquo;s Common Stock
underlying the Series B Preferred Stock are either (i) included in an effective registration statement or (ii) eligible to be traded
pursuant to an applicable exemption from registration.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 0.75in; text-align: justify">&nbsp;</P>

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<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in">(b)</TD><TD STYLE="text-align: justify">The closing of a Qualified Sale in accordance with the terms of the Certificate of Designation.
For these purposes, &ldquo;Qualified Sale&rdquo; means (1) the sale of all or substantially all of the assets of the Company or
the outstanding shares of capital stock of the Company entitled to vote generally for the election of directors, in any such case
for cash or securities having a value of at least $5.00 per share of Common Stock (as adjusted), but excluding any such transaction
in which the consideration received by the Company or its stockholders includes securities of the purchaser and such purchaser
is not subject to the reporting requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in">(c)</TD><TD STYLE="text-align: justify">The merger of the Company which results in the shareholders of the Company prior to the merger
owning less than fifty percent (50%) of the voting power of the Company following the merger.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

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<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.25in">(d)</TD><TD STYLE="text-align: justify">An underwritten initial public offering of the Company&rsquo;s shares with gross proceeds of at
least $50,000,000.</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">A copy of the Certificate of Designations
for the Company&rsquo;s Series B Convertible Preferred Stock is attached to this Report as Exhibit 4.1.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify"><B>Item&nbsp;9.01. Financial Statements
and Exhibits.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(a) &nbsp;Financial Statements of Businesses Acquired</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">The financial statements required by this
item are not included in this Current Report on form 8-K. The financial statements will be provided in an amended report, which
will be filed not later than 71 calendar days after the date that this initial report on Form 8-K must be filed.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">(b) &nbsp;Pro Forma Financial Information</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: justify">The pro forma financial information required
by this item is not included in this Current Report on form 8-K. The pro forma financial information will be provided in an amended
report, which will be filed not later than 71 calendar days after the date that this initial report on Form 8-K must be filed.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.5in">(d)</TD><TD>Exhibits</TD></TR></TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 15%; text-align: justify">Exhibit 2.1.</TD>
    <TD STYLE="width: 85%; text-align: justify">Asset Purchase Agreement by and between the Company and Numa Luling, LLC, a Texas limited liability company dated June 1, 2012.</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">Exhibit 2.2&nbsp;&nbsp;</TD>
    <TD STYLE="text-align: justify">Purchase and Sale Agreement by and between the Company and Eagle Ford Oil Co., Inc. dated June 1, 2012</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">Exhibit 2.3</TD>
    <TD STYLE="text-align: justify">3% Subordinated Convertible Debenture dated May 25, 2012</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">Exhibit 2.4</TD>
    <TD STYLE="text-align: justify">Promissory Note dated May 21, 2012</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">Exhibit 2.5</TD>
    <TD STYLE="text-align: justify">Rio Bravo Oil, Inc. 2012 Employee, Director and Consultant Stock Plan</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">&nbsp;</TD>
    <TD STYLE="text-align: justify">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: justify">Exhibit 4.1&nbsp;</TD>
    <TD STYLE="text-align: justify">Certificate of Designation for Series B Convertible Preferred Stock par value $0.001</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 67.5pt; text-align: justify; text-indent: -67.5pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SIGNATURE</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pursuant to the requirements of the Securities Exchange Act
of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3">RIO BRAVO OIL, INC.</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="3">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR>
    <TD STYLE="width: 5%; vertical-align: top">By:</TD>
    <TD STYLE="width: 5%; vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="width: 40%; vertical-align: bottom; border-bottom: Black 1pt solid">/s/ Carlos E. Buchanan II</TD>
    <TD STYLE="width: 50%">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">Name:</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-left: 0.12in">Carlos E. Buchanan II</TD>
    <TD>&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">Title:</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-left: 0.12in">Chief Financial Officer</TD>
    <TD>&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top">Dated:</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; padding-left: 0.12in">June 8, 2012</TD>
    <TD>&nbsp;</TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

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[{"type": "8-K", "sequence": "1", "filename": "v315473_8k.htm", "description": "8-K CURRENT REPORT", "secsgml_size_bytes": 32010}]
{"company-data": {"conformed-name": "Rio Bravo Oil, Inc.", "cik": "0001502774", "assigned-sic": "1311", "irs-number": "421771917", "state-of-incorporation": "NV", "fiscal-year-end": "0930"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "000-54564", "film-number": "12897962"}, "business-address": {"street1": "180 MADISON AVENUE", "street2": "SUITE 1702", "city": "NEW YORK", "state": "NY", "zip": "10016", "phone": "1-281-724-3810"}, "mail-address": {"street1": "180 MADISON AVENUE", "street2": "SUITE 1702", "city": "NEW YORK", "state": "NY", "zip": "10016"}, "former-company": {"former-conformed-name": "Soton Holdings Group, Inc.", "date-changed": "20101005"}}
UNITED
STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form
8-K
CURRENT REPORT
Pursuant to Section 13 or 15(d)
of the
Securities Exchange Act of 1934
Date of Report (Date of earliest event
reported):
May  18, 2012
Rio Bravo Oil, Inc.
(Exact
name of registrant)
Nevada
000-54564
42-1771917
(State of Incorporation)
(Commission File
Number)
(I.R.S. Employer
Identification Number)
5858 Westheimer, Suite 699
Houston, TX 77057
(Address of principal executive offices
and zip code)
713-787-9060
(Registrant's telephone number,
including area code)
Check the appropriate box below if the Form 8-K filing is intended
to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
¨
Written communications pursuant to Rule 425 under the Securities Act
(17 CFR 230.425)
¨
Soliciting material pursuant to Rule 14a-12 under the Exchange Act
(17 CFR 240.14a-12)
¨
Pre-commencement communications pursuant to Rule 14d-2(b) under the
Exchange Act (17 CFR 240.14d-2(b))
¨
Pre-commencement communications pursuant to Rule 13e-4(c) under the
Exchange Act (17 CFR 240.13e-4(c))
Item 1.01. Entry into a Material Definitive Agreement
Numa Luling Asset Purchase Agreement.
On June 1, 2012, Rio Bravo Oil, Inc. ("Rio
Bravo" or the "Company") entered into an Asset Purchase Agreement (the "Agreement") by and between
the Company and Numa Luling, LLC, a Texas limited liability company ("Numa Luling"). Pursuant to the Agreement, the
Company acquired a twenty-five percent (25%) working interest
in and to various oil and gas leases
and all wells, equipment, agreements and personal property associated therewith located in Caldwell and Guadalupe Counties, Texas,
as more particularly described in the Agreement ("Working Interest")
. The Company also acquired all of Numa
Luling's books and records, contract rights and other assets associated with the Working Interest. The aforementioned property
is hereinafter collectively referred to as the "Numa Luling Assets". The Company only assumed those liabilities of Numa
Luling which were directly related to the Working Interest, as more particularly described in the Agreement.
In full consideration for the purchase
by the Company of the Numa Luling Assets, the Company delivered to Numa Luling 3,250,000 shares of the Company's Series B
Convertible Preferred Stock ("Series B Preferred Shares") valued at $1.00 per share. The Series B Preferred Shares
are convertible in accordance with the Certificate of Designations with respect to such Series B Preferred Shares.
A copy of the Agreement is attached to
this Report as Exhibit 2.1
Eagle Ford Oil Co., Inc. Purchase and
Sale Agreement.
On May 25, 2012, the Company entered
into a Purchase and Sale Agreement (the "Eagle Ford Agreement") by and between a wholly-owned Subsidiary of the
Company and Eagle Ford Oil Co., Inc. ("Eagle Ford"). Pursuant to the Eagle Ford Agreement, the Company acquired
an 80% working interest (20% carried interest is retained by Seller) in the Caltex leasehold from Eagle Ford (shallow and
deeper rights associated with the Luling Edwards Fields leasehold) for $2,225,000. The purchase price was payable $2,000,000
cash at the Closing and delivery of the Company's promissory note in the amount of $225,000 due and payable on December
31, 2012. In addition, the Company assumed certain liabilities of Eagle Ford in the aggregate amount of $1,295,000.
Certain former owners of Pan American Oil, LLC held an interest in the Eagle Ford assets which the Company purchased.
A copy of the Eagle Ford Agreement is attached
to this Report as Exhibit 2.2
Employee,
Director
and Consultant Stock Plan
On May 29, 2012, the Company's
board of directors approved the Rio Bravo Oil, Inc. 2012 Employee, Director and Consultant Stock Plan ("Plan").
The Plan is administered by the Company's board of directors and provides for qualified and non-qualified stock
options, stock grants and stock appreciation rights to be granted at the discretion of the board of directors at a price not
less than the then Fair Market Value of the Company's common shares. The plan further provides that the shares which
are the subject of the Plan shall not exceed fifteen percent (15%) of the Company's issued and outstanding shares from
time to time, subject to an annual adjustment. The Plan also incorporates certain "Change in Control"
provisions.
A copy of the Plan is attached to this
Report as Exhibit 2.5.
Item 2.01 Completion of Acquisition
or Disposition of Assets.
See Item 1.01 Entry into a Material Definitive
Agreement, above.
Item 2.03 Creation of a Direct Financial
Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.
$750,000 Convertible Debenture
On May 25, 2012, the Company issued a $750,000
face amount 3% Subordinated Convertible Debenture ("Debenture") to Del Mar Financial S.a r.l. in exchange for a cash
payment in the amount of $750,000. The Debenture is due and payable on or before April 30, 2017 and bears interest at a rate of
three percent (3%) per annum, payable quarterly in arrears. The Debenture is convertible into shares of Company Common Stock at
any time by the holder at a conversion price of $0.75 per share.
A copy of the 3% Subordinated Convertible
Debenture is attached to this Report as Exhibit 2.3.
$300,000 Promissory Note
On May 21, 2012, the Company issued a Promissory
Note in the face amount of $300,000 in favor of Virtus Trust Limited as Trustee of the Hillside Ventures Investment Trust B ("Note").
The Note is due and payable on or before December 31, 2012 (or upon the Company raising additional capital in the amount of at
least $1,500,000) and bears interest at a rate of six percent (6%) per annum.
A copy of the Note is attached to this
Report as Exhibit 2.4.
Item 3.02 Unregistered Sales of Equity
Securities.
On June 1, 2012, the Company entered into
an Asset Purchase Agreement with Numa Luling, LLC pursuant to which the Company (a) exchanged 3,200,000 shares of its Series B
Convertible Preferred Stock valued at $1.00 per share for certain designated assets of Numa Luling, (b) assumed certain liabilities
of Numa Luling associated with the Numa Luling Assets. See Item 1.01 Entry into a Material Definitive Agreement, above.
Item 5.03 Amendments to Articles of
Incorporation or Bylaws; Change in Fiscal Year.
On April 4, 2012, the Company's Board
of Directors approved the creation of Series B Convertible Preferred Stock and designated 5,000,000 shares of the Company's
authorized Preferred Stock par value $0.001 as Series B Convertible Preferred Stock par value $0.001 ("Series B Preferred
Stock). The Series B Preferred Stock has a dividend preference and liquidation preference over the Company's Common Stock.
The Certificate of Designation for Series B Convertible Preferred Stock par value $0.001 was filed with the Nevada Secretary of
State on May 18, 2012.
Each share of Series B Preferred Stock
may be converted by any holder thereof, without any further consideration, at any time, into a number of shares of Company Common
Stock calculated by dividing the number of shares of Series B Preferred Stock being converted by .75 (the "Conversion Rate").
The Conversion Rate is subject to adjustment as detailed in the Certificate of Designation. Further, each share of Series B Preferred
Stock shall be automatically converted into shares of the Company's Common Stock at the Conversion Rate upon the occurrence
of any of the following events:
(a)
The shares of the Corporation's Common Stock shall trade at a price of over $1.75 per share
(as adjusted) for a period in excess of thirty (30) consecutive trading days and the shares of the Company's Common Stock
underlying the Series B Preferred Stock are either (i) included in an effective registration statement or (ii) eligible to be traded
pursuant to an applicable exemption from registration.
(b)
The closing of a Qualified Sale in accordance with the terms of the Certificate of Designation.
For these purposes, "Qualified Sale" means (1) the sale of all or substantially all of the assets of the Company or
the outstanding shares of capital stock of the Company entitled to vote generally for the election of directors, in any such case
for cash or securities having a value of at least $5.00 per share of Common Stock (as adjusted), but excluding any such transaction
in which the consideration received by the Company or its stockholders includes securities of the purchaser and such purchaser
is not subject to the reporting requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended.
(c)
The merger of the Company which results in the shareholders of the Company prior to the merger
owning less than fifty percent (50%) of the voting power of the Company following the merger.
(d)
An underwritten initial public offering of the Company's shares with gross proceeds of at
least $50,000,000.
A copy of the Certificate of Designations
for the Company's Series B Convertible Preferred Stock is attached to this Report as Exhibit 4.1.
Item 9.01. Financial Statements
and Exhibits.
(a)  Financial Statements of Businesses Acquired
The financial statements required by this
item are not included in this Current Report on form 8-K. The financial statements will be provided in an amended report, which
will be filed not later than 71 calendar days after the date that this initial report on Form 8-K must be filed.
(b)  Pro Forma Financial Information
The pro forma financial information required
by this item is not included in this Current Report on form 8-K. The pro forma financial information will be provided in an amended
report, which will be filed not later than 71 calendar days after the date that this initial report on Form 8-K must be filed.
(d)
Exhibits
Exhibit 2.1.
Asset Purchase Agreement by and between the Company and Numa Luling, LLC, a Texas limited liability company dated June 1, 2012.
Exhibit 2.2
Purchase and Sale Agreement by and between the Company and Eagle Ford Oil Co., Inc. dated June 1, 2012
Exhibit 2.3
3% Subordinated Convertible Debenture dated May 25, 2012
Exhibit 2.4
Promissory Note dated May 21, 2012
Exhibit 2.5
Rio Bravo Oil, Inc. 2012 Employee, Director and Consultant Stock Plan
Exhibit 4.1
Certificate of Designation for Series B Convertible Preferred Stock par value $0.001
SIGNATURE
Pursuant to the requirements of the Securities Exchange Act
of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
RIO BRAVO OIL, INC.
By:
/s/ Carlos E. Buchanan II
Name:
Carlos E. Buchanan II
Title:
Chief Financial Officer
Dated:
June 8, 2012