Document:

SECURITIES
PURCHASE AGREEMENT

 

This
SECURITIES PURCHASE AGREEMENT (this “Agreement”), dated as of May __, 2017, is made by and among Houston
American Energy Corp., a Delaware corporation (the “Company”), and each purchaser listed on Annex A
hereto and executing this Agreement (each, an “Investor” and, collectively, the “Investors”
and, together with the Company, the “Parties”).

 

WHEREAS,
each of the Company and the Investors is executing and delivering this Agreement in reliance upon the exemption from securities
registration afforded by Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”),
and Rule 506 of Regulation D (“Regulation D”) as promulgated by the United States Securities and Exchange Commission
(the “SEC”) under the Securities Act; and

 

WHEREAS,
the Investors wish to purchase from the Company, and the Company wishes to sell and issue to the Investors, upon the terms
and conditions stated in this Agreement, an aggregate of up to 1,000 units (the “Units”), each Unit consisting
of (i) one share of 12.0% Series B Convertible Preferred Stock, par value $0.001 per share, of the Company (the “Preferred
Securities”), the rights, preferences and privileges of which are to be set forth in a Certificate of Designation, in
the form attached hereto as Exhibit A (the “Certificate of Designation”), which shares of Preferred
Securities shall be convertible into, subject to adjustment in accordance thereunder, shares of Common Stock (as defined below),
subject to certain restrictions, and (ii) a Warrant, in the form attached hereto as Exhibit B (the “Warrants”),
to purchase 3,300 shares of Common Stock.

 

NOW,
THEREFORE, in consideration of the mutual agreements, representations, warrants and covenants contained herein, the Parties
hereto agree as follows:

 

ARTICLE
I

AUTHORIZATION, PURCHASE AND SALE OF UNITS

 

Section
1.1 Authorization, Purchase and Sale. On the terms and subject to the conditions set forth in this Agreement, and in reliance
on the representations, warranties, covenants and other agreements set forth in this Agreement, at the Closing, the Company shall
issue and sell to the several Investors, and the several Investors shall purchase from the Company, the number of Units (consisting
of Preferred Securities and Warrants) set forth next to each such Investor’s name on the signature page. The purchase price
per Unit shall be $1,000 and the aggregate purchase price (the “Purchase Price”) for the Units shall be the
amount set forth on Annex A.

 

Section
1.2 Preferred Securities and Warrants. The Preferred Securities and Warrants shall (i) be issued at the Closing to the
Investors on the terms and subject to the conditions set forth in this Agreement, (ii) be registered to the Investors in the Company’s
records and (iii) have the rights, preferences, powers, and the qualifications, restrictions and limitations, set forth, (x) as
to the Preferred Securities, in the Certificate of Designation, and (y) as to the Warrants, in the Warrant.

 

Section
1.3 Closing.

 

(a)
The consummation of the purchase and sale of the Units on the terms and subject to the conditions set forth in this Agreement
shall take place at one or more closings (each being a “Closing”) at the offices of the Company, 801 Travis
Street, Suite 1425, Houston, Texas 77002, within two Business Days following the satisfaction or waiver of each of the conditions
set forth in Article IV with respect to the Closing (other than those condition which, by their terms, are to be satisfied
or waived at the Closing), or at such other time and place as the Company the respective Investor(s) shall agree. The time and
date upon which each Closing occurs is herein referred to as the “Closing Date.”

 

(b)
Closing Deliveries:

 

(i)
At the Closing, the Company shall deliver to each Investor (a) a certificate representing the Preferred Securities, and (b) a
duly executed Warrant, each representing the number of Units purchased; and

 

    	HUSA – Securities Purchase Agr – Series B Preferred	

    	 

    

 

(ii)
At the Closing, each Investor shall deliver to the Company, by bank check or wire transfer of immediately available funds to an
account designated by the Company, an amount equal to the portion of the Purchase Price set forth next to such Investor’s
name on the signature page hereof.

 

ARTICLE
II

REPRESENTATIONS AND WARRANTIES OF THE COMPANY

 

The
Company hereby represents and warrants as of the date hereof and the applicable Closing Date (except for the representations and
warranties that speak as of a specific date, which shall be made as of such date) to each of the Investors as follows:

 

Section
2.1 Organization; Powers. Each of the Company and its Subsidiaries (a) is a legal entity duly organized, validly existing
and in good standing (or, if applicable in a foreign jurisdiction, enjoys the equivalent status under the laws of any jurisdiction
of organization outside the U.S.) under the laws of the jurisdiction of its organization, (b) has all requisite power and authority
to own its property and assets and to carry on its business as now conducted and (c) is qualified to do business as a foreign
corporation (or other legal entity) and is in good standing in each jurisdiction where the ownership, leasing or operation of
its assets or properties or conduct of its business requires such qualification, except where the failure to be so qualified or
in good standing would not, individually or in the aggregate, have or reasonably be expected to result in a Material Adverse Effect.
The organizational or governing documents of the Company and each of its Subsidiaries are in full force and effect. Neither the
Company nor any Subsidiary is in violation of its organizational or governing documents.

 

Section
2.2 Authorization. The Company has all requisite corporate power and, except for the filing of the Certificate of Designation
with the Secretary of State of the State of Delaware, has taken all requisite action on the part of the Company, its officers,
directors and stockholders necessary for (a) the authorization, execution and delivery of the Related Agreements, (b) the authorization
of the performance of all obligations of the Company thereunder, and (c) the authorization, issuance (or reservation for issuance)
and delivery of the Preferred Securities and Warrants. Each of the Related Agreements has been (or upon delivery will have been)
duly executed by the Company and is, or when delivered in accordance with the terms hereof, will constitute a valid and binding
obligation of the Company enforceable against the Company in accordance with its terms, except as may be limited by: (i) applicable
bankruptcy, insolvency, reorganization or other laws of general application relating to or affecting the enforcement of creditors’
rights generally; (ii) applicable United States federal or state securities laws limits on indemnification; and (iii) the effect
of rules of law governing the availability of equitable remedies.

 

Section
2.3 Registration Requirements. (i) Assuming the accuracy of the representations made by the Investors in Article III,
the offer, issuance and sale of the Units pursuant to this Agreement is exempt from registration requirements of the Securities
Act and will have been registered or qualified (or are exempt from registration and qualification) under the registration, permit
or qualification requirements of all applicable Blue Sky laws; and (ii) neither the Company nor, to the knowledge of the Company,
any authorized representative acting on its behalf has taken or will take any action hereafter that would cause the loss of such
exemptions or qualifications.

 

Section
2.4 No Conflict. The execution, delivery and performance by the Company of the Related Agreements, the issuance and sale
of the Units hereunder and the issuance of the Common Stock upon conversion of the Preferred Securities or exercise of the Warrants
and the consummation of the other transactions contemplated by the Related Agreements does not and will not (i) conflict with
or result in a breach of or constitute (alone or with due notice or lapse of time or both) a default under, give rise to a right
of or result in any cancellation or acceleration of any right or obligation (including any payment) or violation of any of the
terms or provisions of, or result in the creation or imposition of any lien, charge or encumbrance upon any property or asset
of the Company or any of its subsidiaries, including any Equity Interest of the Company’s subsidiaries, now owned or subsequently
acquired or formed, pursuant to, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument, including
secured Indebtedness, to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries
is bound or to which any property or asset of the Company or any of its subsidiaries is subject, (ii) result in any violation
of the provisions of the charter or by-laws or similar organizational documents of the Company or any of its subsidiaries or (iii)
result in the violation of any law or statute or any judgment, order, rule or regulation of any court or arbitrator or governmental
or regulatory authority, except, in the case of clauses (i) and (iii) above, for any such conflict, breach, violation, default,
lien, charge or encumbrance that would not, individually or in the aggregate, reasonably be expected to have a Material Adverse
Effect.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	2

    	 

    

 

Section
2.5 Enforceability. This Agreement has been duly executed and delivered by the Company and constitutes, and each other
Related Agreement to which the Company is a party when executed and delivered by the Company, shall constitute, a legal, valid
and binding obligation of the Company, enforceable in accordance with its terms, subject to (i) the effects of applicable bankruptcy,
insolvency, moratorium, reorganization, fraudulent conveyance or other similar laws affecting or relating to creditors’
rights generally, (ii) applicable United States federal or state securities laws limits on indemnification and (iii) general principles
of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

 

Section
2.6 Governmental Consents. No consent, approval, order, or authorization of, or filing or registration with, or notification
to, any Governmental Authority or any trading exchange is required on the part of the Company or its Subsidiaries in connection
with (a) the execution, delivery or performance of the Related Agreements and the consummation of the transactions contemplated
hereby and thereby, or (b) the issuance of the Units or the issuance of the Common Stock upon conversion of the Preferred Securities
in accordance with the Certificate of Designation and the exercise of the Warrants, except (i) as required by the SEC in connection
with the Company’s obligations under Section 5.3, (ii) as may be required under the state securities or “Blue Sky”
laws, (iii) as may be required by the rules and regulation of the NYSE MKT, or (iv) the filing of the Certificate of Designation
with the Secretary of State of the State of Delaware.

 

Section
2.7 SEC Reports; Financial Statements.

 

(a)
Except as disclosed in the SEC Filings, the Company has filed all reports, schedules, forms, statements and other documents required
to be filed by the Company under applicable U.S. securities laws (the foregoing materials, including the exhibits thereto and
documents incorporated by reference therein, being collectively referred to herein as the “SEC Filings”), including
the Annual Report of the Company on Form 10-K for the fiscal year ended December 31, 2016. Each SEC Filing complied as of its
filing date, as to form in all material respects with the applicable requirements of the Securities Act or the Exchange Act, as
the case may be, each as in effect on the date such SEC Filing was filed (and, if amended or superseded by a filing prior to the
date of this Agreement, on the date of such amended or superseded filing). As of its filing date (and, if amended or superseded
by a filing prior to the date of this Agreement, on the date of such amended or superseded filing), each SEC Filing did not contain
any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements made therein,
in the light of the circumstances under which they were made, not misleading.

 

(b)
The consolidated financial statements (including all related notes and schedules) of the Company and its Subsidiaries included
in the SEC Filings (collectively, the “Company Financial Statements”) (i) comply in all material respects with
the published rules and regulations of the SEC with respect thereto and (ii) fairly present, in all material respects, the consolidated
financial position of the Company and its Subsidiaries as of the dates indicated and the results of their operations and their
cash flows for the periods therein specified, all in accordance with United States generally accepted accounting principles applied
on a consistent basis (“GAAP”) throughout the periods therein specified (except as otherwise noted therein,
and in the case of quarterly financial statements except for the absence of footnote disclosure and subject, in the case of interim
periods, to normal year-end adjustments, the effect of which will not, individually or in the aggregate, be materially adverse,
and the absence of footnote disclosure that, if presented, would not differ materially from those included in the audited Company
Financial Statements).

 

Section
2.8 Material Changes; Undisclosed Events, Liabilities or Developments. Since the date of the latest audited financial statements
included within the SEC Filings, except as specifically disclosed in a subsequent SEC Filing filed prior to the date hereof and
excluding the transactions contemplated by this Agreement: (i) there has been no event, occurrence or development that has had
or that would reasonably be expected to result in a Material Adverse Effect, (ii) the Company has not incurred any material liabilities
(contingent or otherwise) other than (A) trade payables, accrued expenses and other liabilities incurred in the ordinary course
of business consistent with past practice and (B) liabilities not required to be reflected in the Company’s financial statements
pursuant to GAAP or disclosed in filings made with the SEC, (iii) the Company has not altered materially its method of accounting
or the manner in which it keeps its accounting books and records, (iv) the Company has not declared or made any dividend or distribution
of cash or other property to its stockholders or purchased, redeemed or made any agreements to purchase or redeem any shares of
its capital stock, (v) the Company has not issued any equity securities to any officer, director or Affiliate, except pursuant
to existing Company stock option or stock purchase plans or equity-based plans disclosed in the SEC Filings and (vi) there has
not been any material change or amendment to, or any waiver of any material right by the Company under, any Material Contract
under which the Company or any of its Subsidiaries is bound or subject. The Company does not have pending before the SEC any request
for confidential treatment of information. Except as set forth on Schedule 2.8 and except for the transactions contemplated
by this Agreement, no event, liability fact, circumstance, occurrence or development has occurred or exists or is reasonably expected
to occur or exist with respect to the Company or its Subsidiaries or their respective business, properties, operations, assets
or financial condition that would be required to be disclosed by the Company under applicable securities laws at the time this
representation, or with the passage of time, or deemed made that has not been publicly disclosed at least one trading day prior
to the date that this representation is made.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	3

    	 

    

 

Section
2.9 Internal Controls. The Company is in compliance in all material respects with the provisions of the Sarbanes-Oxley
Act of 2002 that are currently applicable to the Company. The Company maintains a system of internal accounting controls sufficient
to provide reasonable assurance that (a) transactions are executed in accordance with management’s general or specific authorizations,
(b) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain
asset accountability, (c) access to assets and incurrence of liabilities is permitted only in accordance with management’s
general or specific authorization, and (d) the recorded accountability for assets and liabilities is compared with the existing
assets and liabilities at reasonable intervals and appropriate action is taken with respect to any differences. The Company has
established effective disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the Company
and designed such disclosure controls and procedures to ensure that material information relating to the Company, including the
Subsidiaries, is made known to the certifying officers by others within those entities. The Company’s certifying officers
have evaluated the effectiveness of the Company’s controls and procedures as of the end of the period covered by the most
recently filed periodic report under the Exchange Act (such date, the “Evaluation Date”). Except as disclosed
in the SEC Filings, there has been no material weakness in the Company’s internal control over financial reporting (whether
or not remediated) and, since the Evaluation Date, there have been no significant changes in the Company’s internal controls
(as such term is defined in Item 308 of Regulation S-K) or, to the Company’s Knowledge, in other factors that could significantly
affect the Company’s internal controls.

 

Section
2.10 Title to Properties. The Company and each of its Subsidiaries has good title to all real properties and good title
to all other properties and assets owned by them, in each case free from Liens, encumbrances and defects and the Company and each
of its Subsidiaries holds any leased real or personal property under valid and enforceable leases with no exceptions that would
materially interfere with the use made or to be made thereof by them, except such (a) as are described in the SEC Filings, or
(b) that would not materially affect the value thereof or materially interfere with the use made or to be made thereof by them.

 

Section
2.11 Material Contracts. Neither the Company nor any of its Subsidiaries is in default under or in violation or breach
of any Material Contract to which any of them is a party and, to the Company’s Knowledge, no third-party defaults exist
thereunder, except as would not, individually or in the aggregate, be material to the Company and its Subsidiaries, taken as a
whole.

 

Section
2.12 Litigation; Permits and Compliance with Laws.

 

(a)
Except as set forth in the SEC Filings, there are no (i) investigations or, to the Company’s Knowledge, proceedings pending
or threatened by any Governmental Authority with respect to the Company or any of its Subsidiaries or any of their properties
or assets, (ii) actions, suits or proceedings at law or in equity pending or, to the Company’s Knowledge, threatened against
or affecting the Company or any of its Subsidiaries, or any of their respective properties or assets, at Law or in equity that
would reasonably be expected to result in liability to the Company or its Subsidiaries in excess of $250,000 or any other material
non-monetary liability or restrictions, or (iii) orders, judgments or decrees of any Governmental Authority against the Company
or any of its Subsidiaries.

 

(b)
The Company and each of its Subsidiaries possess adequate certificates, authorities or permits issued by appropriate governmental
agencies or bodies necessary to conduct the business now operated by it (the “Permits”), except where such
failure has not had and would not reasonably be expected to have a Material Adverse Effect on the Company and its Subsidiaries,
taken as a whole, and such Permits are in full force and effect. The Company and each of its Subsidiaries is in compliance with
each of its Permits in all material respects and no material violations are or have been recorded in respect of any Permits. Neither
the Company nor any of its Subsidiaries has received any notice of proceedings relating to the revocation or modification of any
such Permit that, if determined adversely to the Company or such Subsidiary, would reasonably be expected to have a Material Adverse
Effect on the Company and its Subsidiaries, taken as a whole.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	4

    	 

    

 

(c)
None of the Company or any of its Subsidiaries or any of their respective properties or assets is in violation of (nor shall the
continued operation of their respective material properties and assets as currently conducted violate) any law, rule or regulation,
or is in default with respect to any judgment, writ, injunction or decree of any Governmental Authority, where such violation
or default would reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.

 

Section
2.13 Taxes. The Company and its Subsidiaries have paid all U.S. federal, and all material state, local and foreign taxes
and filed all U.S. federal income Tax Returns and all other material Tax Returns required to be paid or filed through the date
hereof; and except as otherwise disclosed in the SEC Filings or as would not, individually or in the aggregate, have a Material
Adverse Effect, there is no tax deficiency that has been, or could reasonably be expected to be, asserted against the Company
or any of its Subsidiaries or any of their respective properties or assets.

 

Section
2.14 No Material Misstatements.

 

(a)
All written factual information (other than forward-looking information and information of a general economic nature or industry
specific nature) (the “Information”) concerning each of the Company and its Subsidiaries, the Transactions
and any other transactions contemplated hereby or otherwise prepared by or on behalf of the foregoing or their respective representatives
and made available to the Investors in connection with the Transactions or the other transactions contemplated hereby, when taken
as a whole, was true and correct in all material respects, as of the date the Information was furnished to the Investors and as
of the Closing Date and did not, taken as a whole, contain any untrue statement of a material fact as of any such date or omit
to state a material fact necessary in order to make the statements contained therein, taken as a whole, not materially misleading
in light of the circumstances under which such statements were made (giving effect to all supplements and updates provided thereto).

 

(b)
The forward-looking information and information of a general economic nature prepared by or on behalf of the Company or any of
its representatives and that have been made available to the Investors in connection with the Transactions or the other transactions
contemplated hereby have been prepared in good faith based upon assumptions believed by the Company to be reasonable as of the
date thereof, as of the date the information was furnished to the Investors.

 

Section
2.15 Employee Benefit Plans. Except as would not reasonably be expected, individually or in the aggregate, to have a Material
Adverse Effect: (i) no “reportable event” within the meaning of Section 4043(c) of ERISA has occurred during the past
five years as to which the Company, any of its Subsidiaries or any ERISA Affiliate was required to file a report with the PBGC;
(ii) no ERISA Event has occurred or is reasonably expected to occur; and (iii) none of the Company, any of its Subsidiaries or
any of their respective ERISA Affiliates has received any written notification that any “multiemployer plan” (as defined
in Section 4001(a)(15) of ERISA) is in reorganization or has been terminated within the meaning of Title IV of ERISA.

 

Section
2.16 Labor Matters. Except as, individually or in the aggregate, would not reasonably be expected to have a Material Adverse
Effect there are no strikes or other labor disputes pending or threatened against the Company or any of its Subsidiaries. Except
as, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect, the consummation of
the Transactions shall not give rise to a right of termination or right of renegotiation on the part of any union under any material
collective bargaining agreement to which the Company or any of its Subsidiaries (or any predecessor) is a party or by which the
Company or any of its Subsidiaries (or any predecessor) is bound.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	5

    	 

    

 

Section
2.17 Environmental Matters. Except as disclosed in the SEC Filings and except as to matters that would not reasonably be
expected to have, individually or in the aggregate, a Material Adverse Effect, (i) the Company and its Subsidiaries (x) are in
compliance with all applicable federal, state, local and foreign laws (including common law), rules, regulations, requirements,
decisions, judgments, decrees and orders and other legally enforceable requirements relating to pollution or the protection of
human health or safety, the environment, hazardous or toxic substances or wastes, pollutants or contaminants (collectively, “Environmental
Laws”); (y) have received and are in compliance with all permits, licenses, certificates or other authorizations or
approvals required of them under applicable Environmental Laws to conduct their respective businesses; and (z) have not received
written notice of any actual or threatened liability under or relating to, or any actual or potential violation of, any Environmental
Laws, including for the investigation or remediation of any disposal or release of hazardous or toxic substances or wastes, pollutants
or contaminants, and have no knowledge of any event or condition that would reasonably be expected to result in any such notice,
(ii) there are no costs or liabilities associated with Environmental Laws of or relating to the Company or its subsidiaries and
(iii) (x) there is no proceeding that is pending, or that is known to be contemplated, against the Company or any of its Subsidiaries
under any Environmental Laws in which a governmental entity is also a party, other than such proceeding regarding which it is
reasonably believed no monetary sanctions of $100,000 or more will be imposed, (y) the Company and its Subsidiaries are not aware
of any facts or issues regarding compliance with Environmental Laws, or liabilities or other obligations under Environmental Laws,
including the release of hazardous or toxic substances or wastes, pollutants or contaminants, that could reasonably be expected
to have a Material Adverse Effect on the capital expenditures, earnings or competitive position of the Company and its Subsidiaries,
and (z) none of the Company or its Subsidiaries anticipates material capital expenditures relating to compliance with any Environmental
Laws.

 

Section
2.18 Capitalization.

 

(a)
Prior to the consummation of the Transactions to be effected at the Closing, the authorized Equity Interests of the Company shall
consist of (A) 150,000,000 shares of Common Stock, $0.001 par value per share, of which 51,277,388 shares are issued and outstanding,
(B) 10,000,000 shares of preferred stock, $0.001 par value per share, of which 1,200 shares of Series A Convertible Preferred
Stock are issued and outstanding (excluding Preferred Shares issued to the Investors pursuant to this Agreement), and (C) 6,432,165
shares of Common Stock were reserved for issuance upon the exercise of outstanding stock options.

 

(b)
When so issued, sold and delivered, the Preferred Securities, the Warrants and the Common Stock underlying the Preferred Securities
and Warrants shall be duly authorized, validly issued, fully paid and non-assessable and free of preemptive rights and other Liens
except for restrictions on transfer arising under any applicable securities laws and each other Related Agreement. The Company
has reserved a sufficient number of shares of Common Stock for issuance upon the conversion of the Preferred Securities and exercise
of the Warrants in full, subject to approval of the Proposal. Except as set forth in Section 2.18(a), there are not issued,
reserved for issuance or outstanding (i) any Equity Interests of the Company, (ii) any securities convertible into or exchangeable
or exercisable for Equity Interests of the Company or (iii) any warrants, calls, options or other rights to acquire from the Company
any Equity Interests or securities convertible into or exchangeable or exercisable for Equity Interests of the Company.

 

(c)
Except for the Related Agreements, there are no outstanding obligations of the Company to (i) issue, deliver or sell, or cause
to be issued, delivered or sold, any Equity Interests or securities convertible into or exchangeable or exercisable for Equity
Interests of the Company (other than as a result of the issuance of any Common Stock to employees or members of management of
the Company or any of its Subsidiaries in connection with the exercise of options or other securities convertible into Common
Stock held or issued to such employees or members of management on the Closing Date) or (ii) repurchase, redeem or otherwise acquire
any such Equity Interests. Other than the Related Agreements, there are no shareholder agreements, partnership agreements, voting
trusts, proxies or other agreements or understandings in effect with respect to the voting or transfer of Equity Interests of
the Company. The rights, preferences, powers, and the qualifications, restrictions and limitations, of the Preferred Securities
are as set forth in the Certificate of Designation and such rights, preferences, powers, and such qualifications, restrictions
and limitations, are, upon filing the Certificate of Designation with the State of Delaware, valid and enforceable under the laws
of the State of Delaware.

 

(d)
From and after the Closing, the Preferred Securities shall, with respect to dividend rights and rights upon the Company’s
liquidation, winding up or dissolution, rank senior to all other Equity Interests of the Company, other than Series A Convertible
Preferred Stock which ranks senior to the Preferred Securities, including any other class or series of its Equity Interests.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	6

    	 

    

 

(e)
The Company has not declared or, except for dividends previously paid as set forth in the SEC Filings, dividends payable with
respect to the Series A Convertible Preferred Stock or as set forth in the Certificate of Designation, agreed to declare or pay,
any dividends, or authorized or made, or agreed to authorize or make, any distribution, upon or with respect to any class or series
of its Equity Interests.

 

(f)
Except as set forth in the SEC Filings, the Company has no Indebtedness and is not a guarantor of any Indebtedness.

 

Section
2.19 Brokers. In the event that the Company retains, utilizes or is represented by any broker or finder who is entitled
to any brokerage, finder’s or other fee or commission in connection with the transactions contemplated by this Agreement,
the Company shall be solely responsible for payment of any such brokerage, finder’s or other fees or commissions.

 

Section
2.20 Insurance The Company and its subsidiaries carry, or are covered by, insurance covering their respective properties,
operations, personnel and businesses in such amounts and covering such risks as is customary for companies engaged in similar
businesses in similar industries; and neither the Company nor any of its subsidiaries has (i) received notice from any insurer
or agent of such insurer that capital improvements or other expenditures are required or necessary to be made in order to continue
such insurance or (ii) any reason to believe that it will not be able to renew its existing insurance coverage as and when such
coverage expires or to obtain similar coverage at reasonable cost from similar insurers as may be necessary to continue its business.

 

Section
2.21 Intellectual Property; Licenses, Etc. Except as would not reasonably be expected to have a Material Adverse Effect,
(a) the Company and each of its Subsidiaries owns, or possesses adequate rights to use, all Intellectual Property that are used
or held for use in or are otherwise reasonably necessary for the present conduct of their respective businesses, (b) to the Company’s
Knowledge, the Company and its Subsidiaries are not interfering with, infringing upon, misappropriating or otherwise violating
Intellectual Property of any Person, and (c) (i) no claim or litigation regarding any of the Intellectual Property owned by the
Company and its Subsidiaries is pending or, to the Company’s Knowledge, threatened and (ii) to the Company’s Knowledge,
no claim or litigation regarding any other Intellectual Property described in Section 2.21 is pending or threatened.

 

Section
2.22 Foreign Corrupt Practices Act. The Company and its Subsidiaries, and, to the Company’s Knowledge or the Knowledge
of any of its Subsidiaries, their respective directors, officers, agents or employees, are in compliance with the U.S. Foreign
Corrupt Practices Act of 1977 or similar law of a jurisdiction in which the Company or any of its Subsidiaries conduct their respective
businesses and to which they are lawfully subject, in each case, in all material respects. No part of the proceeds of the Purchase
Price paid hereunder shall be used to make any unlawful bribe, rebate, payoff, influence payment, kickback or other unlawful payment.

 

ARTICLE
III

REPRESENTATIONS AND WARRANTIES OF THE INVESTORS

 

Section
3.1 Representations and Warranties of the Investors. Each of the Investors hereby severally, and not jointly, represents
and warrants as of the date hereof and as of the respective Closing Date to the Company as follows:

 

(a)
Such Investor is an individual or is an organization duly organized and validly existing and in good standing under the laws of
its state of formation, with all necessary power and authority to own properties and to conduct its business as currently conducted.

 

(b)
Such Investor has all necessary legal power and authority to enter into, deliver and perform its obligations under the Related
Agreements. The execution, delivery and performance of the Related Agreements by such Investor and the consummation by it of the
transactions contemplated thereby have been duly and validly authorized by all necessary legal action, and no further consent
or authorization of such Investor is required. Each of the Related Agreements to which the Investor is a party has been duly executed
and delivered by such Investor, where applicable, and constitutes legal, valid and binding obligations of such Investor; provided,
that, with respect to each such agreement, the enforceability thereof may be limited by applicable bankruptcy, insolvency, fraudulent
transfer, reorganization, moratorium or similar laws from time to time in effect affecting creditors’ rights and remedies
generally and by general principles of equity (regardless of whether such principles are considered in a proceeding in equity
or at law).

 

    	HUSA – Securities Purchase Agr – Series B Preferred	7

    	 

    

 

(c)
The execution, delivery and performance of the Related Agreements by such Investor and the consummation by such Investor of the
transactions contemplated thereby will not (i) conflict with or result in a breach or violation of any of the terms or provisions
of, or constitute a default under, any material agreement to which such Investor is a party or by which such Investor is bound
or to which any of the property or assets of such Investor is subject, (ii) conflict with or result in any violation of the provisions
of the organizational documents of such Investor, or (iii) violate any statute, order, rule or regulation of any court or governmental
agency or body having jurisdiction over such Investor or the property or assets of such Investor, except in the case of clauses
(i) and (iii), for such conflicts, breaches, violations or defaults would not prevent the consummation of the transactions contemplated
by the Related Agreements.

 

(d)
It is an “accredited investor” within the meaning of Rule 501 of Regulation D promulgated under the Securities Act.

 

(e)
It is acquiring the Units for its own account, for investment purposes only and not with a view to any distribution thereof that
would not otherwise comply with the Securities Act.

 

(f)
It understands that (i) the Units have not been registered under the Securities Act and are being issued by the Company in transactions
exempt from the registration requirements of the Securities Act and (ii) all or any part of the Units and the underlying securities
may not be offered or sold except pursuant to effective registration statements under the Securities Act or pursuant to applicable
exemptions from registration under the Securities Act and in compliance with applicable state laws.

 

(g)
It understands that the exemption from registration afforded by Rule 144 (the provisions of which are known to it) depends on
the satisfaction of various conditions, and that, if applicable, Rule 144 may afford the basis for sales only in limited amounts.

 

(h)
It did not employ any broker or finder in connection with the transactions contemplated in this Agreement and no fees or commissions
are payable to any such broker or finder, except as otherwise provided for in this Agreement.

 

(i)
Such Investor is not and is not using the assets of an employee benefit plan as defined in Section 3(3) of ERISA, which is subject
to Title I of ERISA, or any entity whose underlying assets are treated as assets of such employee benefit plans.

 

(j)
Such Investor: (i) is able to fend for itself in the Transactions; (ii) has such knowledge and experience in financial and business
matters as to be capable of evaluating the merits and risks of its prospective investment in the Units; and (iii) has the ability
to bear the economic risks of its prospective investment and can afford the complete loss of such investment.

 

(k)
Such Investor acknowledges that (i) it has conducted its own investigation of the Company and the terms of the Units, (ii) it
has had access to the Company’s public filings with the SEC and to such financial and other information as it deems necessary
to make its decision to purchase the Units, (iii) it is aware that the Company is presently below compliance standards relating
to the continued listing of its Common Stock on the NYSE Mkt and that the Common Stock is subject to delisting from the NYSE Mkt
if non-compliance is not cured, of which there can be no assurance, and (iv) has been offered the opportunity to conduct such
review and analysis of the business, assets, condition, operations and prospects of the Company and the Company Subsidiaries and
to ask questions of the Company and received answers thereto, each as it deemed necessary in connection with the decision to purchase
the Units. Such Investor further acknowledges that it has had such opportunity to consult with its own counsel, financial and
tax advisors and other professional advisers as it believes is sufficient for purposes of the purchase of the Units. The foregoing,
however, does not limit or modify the representations and warranties of the Company in Article II of this Agreement or
the right of the Investor to rely on such representations and warranties.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	8

    	 

    

 

(l)
Except for the representations and warranties contained in Article II of this Agreement (including any references in such
Section to the SEC Reports), such Investor acknowledges that neither the Company nor any Person on behalf of the Company makes,
and the Investor has not relied upon, any other express or implied representation or warranty with respect to the Company or any
Company Subsidiaries or with respect to any other information provided to the Investor in connection with the Transactions.

 

(m)
Such Investor is a citizen of the United States within the meaning of 46 U.S.C. Sec. 50501 (a “U.S. Citizen”).

 

(n)
Such Investor understands that the Units are being offered and sold in reliance on a transactional exemption from the registration
requirements of federal and state securities laws and that the Company is relying upon the truth and accuracy of the representations,
warranties, agreements, acknowledgments and understandings of such Investor set forth herein in order to determine the applicability
of such exemptions and the suitability of such Investor to acquire the Units.

 

(o)
Such Investor understands that the certificates evidencing the Preferred Securities, the Warrants and the Common Stock issuable
upon conversion of the Preferred Securities and exercise of the Warrants may bear a legend or other restriction substantially
to the following effect (it being agreed that if any such securities are not certificated other appropriate restrictions shall
be implemented to give effect to the following):

 

“THIS
SECURITY WAS ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED,
(THE “SECURITIES ACT”), AND THIS SECURITY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE
OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE COMPANY THAT
(A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) IN A TRANSACTION NOT INVOLVING A PUBLIC OFFERING,
(II) PURSUANT TO ANY OTHER EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, INCLUDING RULE 144 UNDER THE SECURITIES
ACT (IF AVAILABLE), (III) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR (IV) TO THE COMPANY OR ANY
COMPANY SUBSIDIARY, IN EACH OF CASES (I) THROUGH (IV) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED
STATES, AND (B) THE HOLDER WILL NOTIFY ANY SUBSEQUENT PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO
IN (A) ABOVE.”

 

ARTICLE
IV

CONDITIONS OF PURCHASE

 

Section
4.1 Purchase of the Units. The obligation of the Investors to purchase the Units is subject to the satisfaction (or waiver
by the Investors) of the following conditions on or prior to the applicable Closing Date:

 

(a)
The Investors shall have received a counterpart of each Related Agreement signed by each of the requisite parties thereto (which
may include delivery of a signed signature page of this Agreement and each other Related Agreement by facsimile or other means
of electronic transmission (e.g., “pdf”)).

 

(b)
The representations and warranties of the Company contained in Article II shall be true and correct in all material respects
(other than representations and warranties which are already qualified as to materiality, which shall be true and correct in all
respects) as of the date when made and as of the applicable Closing Date, as though made on and as of such date, except for such
representations and warranties that speak as of a specific date, which shall be true and correct as of such specified date.

 

(c)
The Company shall have adopted and filed with the Secretary of State of Delaware the Certificate of Designation.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	9

    	 

    

 

(d)
The Company shall have performed, satisfied and complied in all material respects with all covenants, agreements and conditions
required by the Related Agreements to be performed, satisfied or complied with by it at or prior to the Closing Date.

 

(e)
There shall not have occurred any Material Adverse Effect since December 31, 2016.

 

(f)
The Company shall have delivered to the Investors a certificate, executed on behalf of the Company by its Chief Executive Officer
or its Chief Financial Officer, dated as of the applicable Closing Date, certifying as to the matters set forth in subsections
(b), (c), (d) and (e) of this Section 4.1.

 

(g)
On the Closing Date, the Company shall deliver to each Investor (i) a duly executed Warrant, and (ii) certificates representing
the Preferred Securities purchased by such Investor or evidence of the issuance of the Preferred Securities credited to book-entry
accounts maintained by a nationally recognized transfer agent.

 

Section
4.2 Sale of the Units. The obligation of the Company to issue and sell the Units is subject to the satisfaction (or waiver
by the Company) of the following conditions on or prior to the applicable Closing Date:

 

(a)
The Company shall have received the Purchase Price from the Investor as set forth on Annex A.

 

(b)
The Company shall have received a counterpart of each Related Agreement signed by each of the requisite parties thereto (which
may include delivery of a signed signature page of this Agreement and each other Related Agreement by facsimile or other means
of electronic transmission (e.g., “pdf”)).

 

(c)
The representations and warranties of each Investor contained in Article III shall be true and correct in all material
respects (other than representations and warranties which are already qualified as to materiality, which shall be true and correct
in all respects) as of the date when made and as of the applicable Closing Date, as though made on and as of such date, except
for such representations and warranties that speak as of a specific date, which shall be true and correct as of such specified
date.

 

(d)
The Investor shall have performed, satisfied and complied in all material respects with all covenants, agreements and conditions
required by the Related Agreements to be performed, satisfied or complied with by it at or prior to the applicable Closing Date.

 

(e)
No court of competent jurisdiction or other competent governmental or regulatory authority shall have issued an order making illegal
or otherwise restricting, preventing or prohibiting the Transactions in a manner that cannot reasonably be remedied by the Company
or the Investors.

 

ARTICLE
V

COVENANTS

 

Section
5.1 Shares Issuable Upon Conversion. The Company will at all times have reserved and available for issuance a number of
shares of Common Stock, free of any preemptive or similar rights of stockholders of the Company, equal to the lesser of: (i) all
authorized but unissued shares of Common Stock (other than those reserved under the Company’s management equity incentive
plans as of the date of this Agreement) and (ii) a number of shares of Common Stock sufficient to permit (A) the conversion in
full of all of the outstanding Preferred Securities into Common Stock pursuant to the Certificate of Designation (assuming the
receipt of stockholder approval of the Proposal), and (B) the exercise in full of the Warrants; in each case including as may
be adjusted for share splits, combinations or other similar transactions as of the date of determination or due to the accrual
of accreting dividends.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	10

    	 

    

 

Section
5.2 Stockholder Approval of Proposal.

 

(a)
Promptly upon a determination that the shares of Common Stock issuable upon conversion of the Preferred Securities or exercise
of the Warrants may be limited as a result of application of any Exchange Voting Requirements, but not later than the next annual
meeting of stockholders of the Company, the Company shall take all action necessary to call a meeting of its stockholders (the
“Stockholders Meeting”) for the purpose of seeking approval of the Proposal, including, but not limited to,
filing a Proxy Statement (as defined below) for such Stockholders Meeting. In the event that the Proposal is not approved by the
Company’s stockholders at the Stockholders Meeting, the Company shall take all action necessary to call at least two additional
special meetings of its stockholders (each such additional meeting, a “Subsequent Stockholders Meeting”) for
the purpose of seeking approval of the Proposal; provided, the Company shall seek approval of the Proposal not approved
at a Subsequent Stockholders Meeting at each annual meeting following the second Subsequent Stockholders Meeting. In connection
with the Stockholders Meeting and, if applicable, any Subsequent Stockholders Meeting, the Company will promptly prepare and file
with the SEC proxy materials (including a proxy statement and form of proxy) in compliance with Section 14(a) of the Exchange
Act and the rules promulgated thereunder (as amended or supplemented, each, a “Proxy Statement”) for use at
the Stockholders Meeting and, if applicable, any Subsequent Stockholders Meeting. After receiving and promptly responding to any
comments of the SEC thereon, the Company shall promptly mail such Proxy Statement (or, if permitted, notice of the availability
of such Proxy Statement) to the stockholders of the Company. The Company will comply with Section 14(a) of the Exchange Act and
the rules promulgated thereunder in relation to any form of proxy to be sent or made available to the stockholders of the Company
in connection with the Stockholders Meeting or, if applicable, any Subsequent Stockholders Meeting, and each Proxy Statement shall
not, on the date that such Proxy Statement (or any amendment thereof or supplement thereto) is first mailed or made available
to stockholders or at the time of the Stockholders Meeting or any Subsequent Stockholders Meeting, contain any untrue statement
of a material fact or omit to state any material fact necessary in order to make the statements made therein not false or misleading,
or omit to state any material fact necessary to correct any statement in any earlier communication with respect to the solicitation
of proxies for the Stockholders Meeting or any Subsequent Stockholders Meeting which has become false or misleading. Each Investor
shall promptly furnish in writing to the Company such information relating to such Investor and its investment in the Company
as the Company may reasonably request for inclusion in each Proxy Statement.

 

(b)
The Company’s Board of Directors shall recommend to the Company’s stockholders that the stockholders vote in favor
of the Proposal at the Stockholders Meeting and, if applicable, the Subsequent Stockholders Meeting, and take all reasonable action
to solicit the approval of the stockholders for the Proposals. The Company shall (i) take all action necessary to convene the
Stockholders Meeting and, if necessary, any Subsequent Stockholders Meeting, to consider and vote upon the approval of the Proposal
and (ii) submit the Proposal at the Stockholders Meeting or, if applicable, the Subsequent Stockholders Meeting to the stockholders
of the Company for their approval.

 

Section
5.3 Registration Statement.

 

(a)
The Company will, at is sole cost and expense, prepare and, not later than 30 calendar days following the first Closing, file
with the SEC a registration statement (the “Registration Statement”) on Form S-3 or, if Form S-3 is unavailable,
on Form S-1 registering the delayed and continuous resale of all of Conversion Shares pursuant to Rule 415 under the Securities
Act and will use commercially reasonable efforts to cause such Registration Statement to be declared effective as promptly as
practicable and to remain continuously effective until all Conversion Shares may be resold by each Investor, other than officers
of the Company, pursuant to Rule 144 without volume limitation, manner-of-sale restrictions or the Company being in compliance
with any current public information requirement (the “Registration Period”).

 

(b)
Notwithstanding the undertaking in Section 5.3(a), if the SEC informs the Company that all of the Conversion Shares cannot, as
a result of the application of Rule 415, be registered for resale as a secondary offering on a single registration statement,
the Company agrees to use its commercially reasonable efforts to file amendments to the Registration Statement as required by
the SEC, covering the maximum number of Conversion Shares permitted to be registered by the SEC, to register for resale the Conversion
Shares as a secondary offering; provided, however, that prior to filing such amendment, the Company will use commercially reasonable
efforts to advocate with the SEC for the registration of all of the Conversion Shares in accordance with SEC guidance.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	11

    	 

    

 

(c)
In connection with the Registration Statement, the Company will, as soon as reasonably practicable:

 

(i)       Prepare
and file with the SEC such pre-effective and post-effective amendments and supplements to the Registration Statement and the Prospectus
used in connection with the Registration Statement, and file such reports under the Exchange Act, as may be necessary to cause
the Registration Statement to become effective, to keep the Registration continuously effective during the Registration Period
and not misleading in any material respect, and as may otherwise be required or applicable under, and to comply with the provisions
of, the Securities Act with respect to the disposition of all of the Conversion Shares covered by the Registration Statement during
the Registration Period;

 

(ii)       Furnish
to the Investors such number of copies of the Prospectus, and each amendment or supplement thereto, in conformity with the requirements
of the Securities Act, and such other documents as the Investors may reasonably request in order to facilitate the disposition
of the Conversion Shares owned by it;

 

(iii)       Notify
the Investors: (A) when a Prospectus or any Prospectus supplement or post-effective amendment is proposed to be filed and, with
respect to any post-effective amendment, when the same has become effective, except for any filing to be made solely to incorporate
by reference a Current Report on Form 8-K, Quarterly Report on Form 10-Q or Annual Report on Form 10-K to be filed with the SEC;
(B) of any request by the SEC or any other federal or state governmental authority for amendments or supplements to a Registration
Statement or a Prospectus or for additional information; (C) of the issuance by the SEC of any stop order suspending the effectiveness
of a Registration Statement or the initiation of any proceedings for that purpose; (D) of the receipt by the Company of any notification
with respect to the suspension of the qualification or exemption from qualification of any of the Conversion Shares for sale in
any jurisdiction, or the initiation or threatening of any proceeding for such purpose, and (E) of the occurrence of any event
or circumstance that makes any statement made in the Registration Statement or Prospectus or any document incorporated or deemed
to be incorporated therein by reference untrue in any material respect or that requires the making of any changes in the Registration
Statement, Prospectus or documents so that, in the case of a Registration Statement or the Prospectus, as the case may be, it
will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary
to make the statements therein, in light of the circumstances under which they were made, not misleading; provided, however, in
no event will any such notice contain any information which would constitute material, non-public information regarding the Company;

 

(iv)       Use
reasonable best efforts to avoid the issuance of, or, if issued, obtain the withdrawal of, any order suspending the effectiveness
of the Registration Statement, or the lifting of any suspension of the qualification, or exemption from qualification, of any
of the Conversion Shares for sale in any jurisdiction, at the earliest practicable moment;

 

(v)       Incorporate
in a Prospectus supplement or post-effective amendment such information as each Investor reasonably requests be included therein
regarding each such Investor or the plan of distribution of the Conversion Shares; and make all required filings of the Prospectus
supplement or such post-effective amendment as soon as practicable after the Company has received notification of such matters
to be incorporated in such Prospectus supplement or post-effective amendment; provided, however, that the Company will not be
required to take any action pursuant to this paragraph that would violate applicable law;

 

(vi)       Whenever
necessary, prepare and deliver to each Investor any required supplement or amendment, including a post-effective amendment, to
the Registration Statement or a supplement to the Prospectus or any document incorporated or deemed to be incorporated therein
by reference, and file any other required document, including such reports as may be required to be filed under the Exchange Act,
so that, as thereafter delivered, the Prospectus will not contain an untrue statement of a material fact or omit to state a material
fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they
were made, not misleading;

 

    	HUSA – Securities Purchase Agr – Series B Preferred	12

    	 

    

 

(vii)       Use
reasonable best efforts to cause all Conversion Shares to be listed on the Principal Market or such other securities exchange
or automated quotation system, if any, as is then the principal securities exchange or automated quotation system on which the
Common Stock is then listed; and

 

(viii)       Fully
cooperate with the Company’s transfer agent, the Investors and their brokers to facilitate the timely clearing and delivery
of Conversion Shares to be sold pursuant to the Registration Statement free of any restrictive legends and in such denominations
and registered in such names as Investors may reasonably request, including timely completion and delivery of all forms, documents
and instruments requested by the transfer agent or any broker.

 

Section
5.4 Commercially Reasonable Efforts; Further Assurances.

 

(a)
Upon the terms and subject to the conditions set forth in this Agreement, each of the Investors and the Company shall use commercially
reasonable efforts to take, or cause to be taken, all actions, and to do, or cause to be done, and to assist and cooperate with
the other parties or parties hereto in doing, all things reasonably necessary, proper or advisable under applicable Law to consummate
and make effective, in the most expeditious manner practicable, the transactions contemplated by the Related Agreements, including
using commercially reasonable efforts to: (i) cause the conditions to the applicable Closing set forth in Article IV to
be satisfied; (ii) obtain all necessary actions or non-actions, waivers, consents, approvals, orders and authorizations from Governmental
Authorities and make all necessary registrations, declarations and filings with Governmental Authorities; and (iii) execute or
deliver any additional instruments reasonably necessary to consummate the transactions contemplated by, and to fully carry out
the purposes of, the Related Agreements.

 

(b)
Each party agrees to cooperate with each other and their respective officers, employees, attorneys, accountants and other agents,
and, generally, do such other reasonable acts and things in good faith as may be reasonably necessary to effectuate the transactions
contemplated by the Related Agreements, subject to the terms and conditions hereof and thereof and compliance with applicable
Law, including taking reasonable action to facilitate the filing of any document or the taking of reasonable action to assist
the other parties hereto in complying with the terms hereof and thereof.

 

Section
5.5 Tax Characterization. Unless otherwise required by a “determination”, as defined in Section 1313(a) of
the Code, the parties agree to treat the Preferred Securities as stock other than preferred stock (within the meaning of Section
305 of the Code) for U.S. federal, and to the extent applicable, state and local income tax purposes.

 

Section
5.6 Confidential Information.

 

(a)
Each Investor recognizes that Confidential Information may have been and may be disclosed to such Investor by the Company or any
of its Subsidiaries. Each Investor shall not engage in the unauthorized use, and shall cause its Affiliates not to engage in the
unauthorized use, or make any unauthorized disclosure to any third party, of any Confidential Information without the prior written
consent of the Company and shall use due care to ensure that such Confidential Information is kept confidential, including by
treating such information as such party would treat its own Confidential Information. Notwithstanding the foregoing, the Investor
shall have the right to share any Confidential Information with any of their representatives, each of whom shall be required to
agree to keep confidential such Confidential Information to the extent required of the Investor under this Section 5.6.
As used herein, “Confidential Information” means all information, knowledge, systems or data relating to the
business, operations, finances, policies, strategies, intentions or inventions of the Company and/or its Subsidiaries (including
any of the terms of this Agreement) from whatever source obtained, except for any such information, knowledge, systems or data
which (i) has become publicly known and made generally available through no wrongful act of such Investor, (ii) has been rightfully
received by such Investor from a third party who, to the knowledge of such Investor, is not bound by any obligations of confidentiality
with respect to such information, knowledge, systems or data, (iii) is independently developed by such Investor without use of
Confidential Information, (iv) is already known by or is already in the possession of such Investor or any of its Affiliates prior
to the date hereof, or (v) subject to the obligations set forth in Section 5.6(b), is required by law, court order, subpoena,
stock exchange, self-regulatory organization, governmental agency, or regulatory body to be disclosed.

 

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(b)
If any Investor is requested to disclose any Confidential Information by any Governmental Authority or for any regulatory reason,
such Investor will promptly notify the Company, as is reasonably practicable and legally permissible under the circumstances,
to permit it to seek a protective order or take other action that the Board of Directors in its discretion deems appropriate,
and such Investor will cooperate in any such efforts to obtain a protective order or other reasonable assurance that confidential
treatment will be accorded such Confidential Information, at the Company’s sole cost and expense. If, in the absence of
a protective order, such Investor is compelled to disclose any such information in any proceeding or pursuant to legal process,
such Investor may disclose to the party compelling disclosure only the part of such Confidential Information as is required to
be disclosed (in which case, prior to such disclosure, such Investor will advise and, if requested by the Board of Directors,
consult with the Company and its counsel as to such disclosure and the nature and wording of such disclosure) and such Investor
will use its commercially reasonable efforts to obtain confidential treatment therefor. Notwithstanding the foregoing, the Investor
shall not be required to notify the Company if it is required to disclose Confidential Information pursuant to a routine regulatory
inquiry or blanket document request, not targeting the Company or the Board of Directors.

 

Section
5.7 Further Assurances. The Company and each Investor shall execute and deliver such documents and other instruments and
take such further actions as may be reasonably required or desirable to carry out the provisions hereof and the transactions contemplated
hereby; and the Company shall use commercially reasonable efforts to remedy any order contemplated by Section 4.2(e) hereof.

 

Section
5.8 Access. During the period from the date of this Agreement to the earlier of the Closing Date and the termination of
this Agreement in accordance with Article VI, the Company shall: (i) provide the Investors and their representatives reasonable
access to key personnel, books, records, facilities, properties, customers, suppliers, records, contracts, documents and data
of the Company, and (ii) furnish the Investors and their representatives with copies of all such books, records, Tax Returns reflecting
the business operations of the Company, contracts, documents, data and information as they may reasonably request; provided,
that such access, investigations and inquiries by or on behalf of the Investors shall (x) be given at reasonable times and upon
prior written notice, (y) during normal business hours and without undue interference with normal operations or customer or employee
relations, and (z) be subject to any limitations prescribed by applicable law or that are reasonably required to preserve any
applicable attorney-client privilege or other legally recognized privilege.

 

Section
5.9 Use of Proceeds. The Company shall apply the net proceeds from the issuance and sale of the Units for general corporate
purposes, including funding working capital, acquiring and/or developing oil and gas assets, and payment of expenses in connection
with the Transactions.

 

ARTICLE
VI

MISCELLANEOUS

 

Section
6.1 Survival. The representations and warranties made by the Company contained in this Agreement, and made by or on behalf
of any of the Investors pursuant to this Agreement, shall survive for a period of 18 months following the applicable Closing Date,
regardless of any investigation made at any time by or on behalf of the Investors or the Company. The covenants made in this Agreement
or any Related Agreement shall survive the Closing and remain operative and in full force and effect regardless of acceptance
of any of the Units and payment therefor and repayment, conversion or repurchase thereof.

 

Section
6.2 Termination. As among the Company, on the one hand, and each individual Investor, on the other hand, this Agreement
may be terminated at any time prior to Closing:

 

(a)
by either the individual Investor or the Company if the Closing shall not have occurred by the 60th calendar day following the
date of this Agreement; provided, however, that the right to terminate this Agreement under this Section 6.2 shall not be available
to any party whose failure to fulfill any obligations under this Agreement shall have been the cause of, or shall have resulted
in, the failure of the Closing to occur on or prior to such date;

 

    	HUSA – Securities Purchase Agr – Series B Preferred	14

    	 

    

 

(b)
by either the individual Investor or the Company in the event any Governmental Authority shall have issued an order, decree or
ruling or taken any other action restraining, enjoining or otherwise prohibiting the Transactions and such order, decree, ruling
or other action shall have become final and nonappealable; or

 

(c)
by the mutual written consent of the individual Investor and the Company.

In
the event of termination of this Agreement as provided in this Section 6.2, this Agreement shall forthwith become void
and there shall be no liability on the part of any party hereto; provided, that, notwithstanding the foregoing, the terms
of Section 5.6, Sections 6.3 through 6.9 and this Section 6.2 shall remain in full force and effect
and shall survive any termination of this Agreement.

 

Section
6.3 Indemnification. The Company agrees to indemnify and hold harmless each Investor and its Affiliates and their respective
directors, officers, members, managers, agents and employees, and their respective successors and assigns, from and against any
and all losses, claims, damages, liabilities and expenses (including without limitation reasonable attorneys’ fees and disbursements)
to which such Person may become subject as a result of, arising out of, in connection with or related to: (i) any breach of representation,
warranty, covenant or agreement made by or to be performed on the part of the Company under the Related Agreements; or (ii) any
action, suit, claim, proceeding or investigation (other than actions, suits, claims, proceedings or investigations arising from
the willful conduct or gross negligence of the Investor) by any governmental authority, stockholder of the Company or any other
Person (other than the Company) relating to this Agreement or the other Related Agreements or the transactions contemplated hereby
or thereby, and in each case, will reimburse any such Person for all such amounts as they are incurred by such Person.

 

Section
6.4 Entire Agreement; Parties in Interest. This Agreement and each other Related Agreement constitutes the entire agreement,
and supersedes all other prior agreements and understandings, both written and oral, among the Parties with respect to the subject
matter hereof. This Agreement shall be binding upon and inure solely to the benefit of each Party and their respective successors,
legal representatives and permitted assigns, and nothing in this Agreement, express or implied, is intended to or shall confer
upon any other Person any rights, benefits or remedies of any nature whatsoever under or by reason of this Agreement.

 

Section
6.5 Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of Texas,
without giving effect to any choice or conflict of law provision or rule (whether of the State of Texas or any other jurisdiction)
that would cause the application of the laws of any jurisdiction other than the State of Texas.

 

Section
6.6 Jurisdiction. Each of the parties hereto irrevocably submits to the exclusive jurisdiction of the District Court of
the State of Texas sitting in Harris County, Texas, or in the event (but only in the event) that the Texas District Court does
not have subject matter jurisdiction over such legal action or proceeding, the United States District Court for the Southern District
of Texas sitting in Harris County, Texas, for the purpose of any suit, action, proceeding or judgment relating to or arising out
of this Agreement and the transactions contemplated hereby. Service of process in connection with any such suit, action or proceeding
may be served on each party hereto anywhere in the world by the same methods as are specified for the giving of notices under
this Agreement. Each of the parties hereto irrevocably consents to the jurisdiction of any such court in any such suit, action
or proceeding and to the laying of venue in such court. Each party hereto irrevocably waives any objection to the laying of venue
of any such suit, action or proceeding brought in such courts and irrevocably waives any claim that any such suit, action or proceeding
brought in any such court has been brought in an inconvenient forum.

 

Section
6.7 Waiver of Jury Trial. EACH OF THE PARTIES HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY ACTION,
PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT OR OTHERWISE) ARISING OUT OF OR RELATING TO THIS AGREEMENT, ANY OTHER
RELATED AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	15

    	 

    

 

Section
6.8 Remedies.

 

(a)
Except as otherwise provided herein, all remedies available under this Agreement, at law or otherwise, shall be deemed cumulative
and not alternative or exclusive of other remedies. The exercise by any Party of a particular remedy shall not preclude the exercise
of any other remedy.

 

(b)
Each Party hereby acknowledges and agrees that the other Party would be damaged irreparably in the event any of the provisions
of this Agreement are not performed in accordance with their specific terms or otherwise are breached and that remedies at law
would not be adequate to compensate such other Parties not in default or in breach. Accordingly, each Party agrees that the other
Parties shall be entitled to an injunction or injunctions to prevent breaches of the provisions of this Agreement and to enforce
specifically the terms and provisions of this Agreement in addition to any other remedy to which they may be entitled, at law
or in equity. The Parties waive any defense that a remedy at law is adequate and any requirement to post bond or provide similar
security in connection with actions instituted for injunctive relief or specific performance of this Agreement.

 

Section
6.9 Notices.

 

(a)
Except as otherwise provided in this Agreement, any notice or other communication required or permitted to be delivered to any
Party under this Agreement shall be in writing and delivered by (i) email or (ii) U.S. mail or (iii) overnight delivery via a
national courier service to the following email address or physical address, as applicable:

 

If
to the Company:

Houston
American Energy Corp.

801
Travis Street, Suite 1425

Houston,
TX 77002

Attention:
John P. Boylan, President

E-mail:
jpb@houstonamericanenergy.com

 

If
to the Investors:

 

At
the address shown on the signature page hereof.

 

(b)
Notice or other communication pursuant to Section 6.10(a) shall be deemed given or received (i) in the case of personal
delivery or delivery by electronic mail, on the date of such delivery, (ii) in the case of dispatch by nationally recognized overnight
courier, on the next Business Day following such dispatch and (iii) in the case of mailing, on the fifth Business Day after the
posting thereof. Any Party may specify a different address, by written notice to the other Parties. The change of address shall
be effective upon the other Parties’ receipt of the notice of the change of address.

 

Section
6.10 Amendments; Waivers. Any provision of this Agreement may be amended or waived if, and only if, such amendment or waiver
is in writing and signed, in the case of an amendment, by the Parties, or in the case of a waiver, by the Party against whom the
waiver is to be effective. No knowledge, investigation or inquiry, or failure or delay by the Company or the Investors in exercising
any right hereunder shall operate as a waiver thereof nor shall any single or partial exercise thereof preclude any other or further
exercise of any other right hereunder. No waiver of any right or remedy hereunder shall be deemed to be a continuing waiver in
the future or a waiver of any rights or remedies arising thereafter.

 

Section
6.11 Counterparts. This Agreement may be executed (including by facsimile transmission, “. pdf,” or other electronic
transmission) in two or more counterparts, and by the different Parties in separate counterparts, each of which when executed
shall be deemed to be an original, but all of which taken together shall constitute one and the same agreement, and shall become
effective when two or more counterparts have been signed by each of the Parties and delivered (including by facsimile transmission,
“. pdf” or other electronic transmission) to the other Parties.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	16

    	 

    

 

Section
6.12 Assignment. This Agreement shall be binding upon and shall inure to the benefit of the Parties and their respective
permitted assigns and successors. Neither this Agreement nor any of the rights, interests or obligations set forth in, arising
under or created by this Agreement may be assigned by any of the Parties without the prior written consent of the other Parties,
except that each of the Investors may, without the consent of the Company, assign all or a portion of its rights, interests and
funding obligation hereunder to one or more of their respective Affiliates, but only to Affiliates that are U.S. Citizens; provided
that any such assignment shall not relieve any of the Investors of its funding obligation hereunder on the Closing Date. In
the event of an assignment to such an Affiliate, such Affiliate shall become party to this Agreement by execution of a joinder
hereto in form and substance reasonably acceptable to the Company. Any assignment or transfer in violation of this Section
6.12 shall be null and void.

 

Section
6.13 Severability. In the event that any provision of this Agreement, or the application thereof becomes or is declared
by a court of competent jurisdiction to be illegal, void, invalid or unenforceable, the remainder of this Agreement shall continue
in full force and effect and the application of such provision to other Persons or circumstances shall be interpreted so as reasonably
to effect the intent of the Parties. The Parties further agree to replace such illegal, void, invalid or unenforceable provision
of this Agreement with a legal, valid and enforceable provision that achieves, to the extent possible, the economic, business
and other purposes of such illegal, void, invalid or unenforceable provision.

 

ARTICLE
VII

DEFINITIONS

 

Section
7.1 Defined Terms. The following words and phrases have the meanings specified in this Section 7.1:

 

“Affiliate”
shall mean with respect to any Person, any other Person that, directly or indirectly, through one or more intermediaries, controls,
is controlled or managed by, or is under common control with, such Person, and all funds and accounts managed by such Person.

 

“Agreement”
shall have the meaning assigned to such term in the preamble.

 

“Business
Day” means any day, other than a Saturday, Sunday or other day, on which banks in the City of Houston, Texas are authorized
or required by law or executive order to remain closed.

 

“Certificate
of Designation” shall have the meaning assigned to such term in the recitals to this Agreement.

 

“Closing”
shall have the meaning assigned to such term in Section 1.3(a).

 

“Closing
Date” shall have the meaning assigned to such term in Section 1.3(a).

 

“Code”
shall mean the Internal Revenue Code of 1986.

 

“Common
Stock” shall mean shares of Common Stock of the Company, par value $0.001 per share.

 

“Company”
shall have the meaning assigned to such term in the preamble to this Agreement.

 

“Company
Financial Statements” shall have the meaning assigned to such term in Section 2.7(b).

 

“Confidential
Information” shall have the meaning assigned to such term in Section 5.6(a).

 

“Control”
(including the terms “controlling”, “controlled by” or “under common control with”) means
the possession, direct or indirect, of the power to direct or cause the direction of the management and policies of a Person,
whether through the ownership of voting securities, by contract or otherwise.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	17

    	 

    

 

“Conversion
Shares” means shares of Common Stock issuable upon conversion of the Preferred Securities and exercise of the Warrants.

 

“Environment”
shall mean ambient and indoor air, surface water and groundwater (including potable water, navigable water and wetlands), the
land surface or subsurface strata, natural resources such as flora and fauna, the workplace or as otherwise defined in any Environmental
Law.

 

“Environmental
Laws” shall mean all applicable laws (including common law), rules, regulations, codes, ordinances, orders, binding
agreements, decrees or judgments, promulgated or entered into by or with any Governmental Authority, relating in any way to the
Environment, preservation or reclamation of natural resources, the generation, use, transport, management, Release or threatened
Release of, or exposure to, any Hazardous Substance or to public or employee health and safety matters (to the extent relating
to the Environment or Hazardous Substances).

 

“Equity
Interests” means shares of capital stock, partnership interests, membership interests in a limited liability company,
beneficial interests in a trust or other equity ownership interests in a Person, and any and all warrants, rights or options to
purchase any of the foregoing, including convertible securities.

 

“Evaluation
Date” shall have the meaning assigned to such term in Section 2.9.

 

“Exchange
Act” shall mean the Securities Exchange Act of 1934, as amended.

 

“Exchange
Voting Requirement” shall mean any applicable rule or requirement of the Principal Market whereby stockholder approval
is a condition of issuing shares above prescribed thresholds if such shares are listed on the Principal Market and if such issuance
(i) results in a change of control of the listed company or (ii) results, or could result, in issuance above a percentage and
subject to criteria established by the Principal Market.

 

“GAAP”
shall have the meaning assigned to such term in Section 2.7(b).

 

“Governmental
Authority” shall mean any United States or non-United States federal, state or local government, or any agency, bureau,
board, commission, department, tribunal or instrumentality thereof or any court, tribunal, or arbitral or judicial body.

 

“Hazardous
Substances” means (A) petroleum and petroleum products, by-products or breakdown products, radioactive materials, asbestos-containing
materials and polychlorinated biphenyls, and (B) any other chemical, material or substance defined or regulated as toxic or hazardous
or as a pollutant, contaminant or waste under Environmental Laws.

 

“Indebtedness”
of any Person shall mean, if and to the extent (other than with respect to clause (i) of this definition) the same would constitute
indebtedness or a liability on a balance sheet prepared in accordance with GAAP, without duplication, (a) all obligations of such
Person for borrowed money, (b) all obligations of such Person evidenced by bonds, debentures, notes or similar instruments, (c)
all obligations of such Person under conditional sale or other title retention agreements relating to property or assets purchased
by such Person, (d) all obligations of such Person issued or assumed as the deferred purchase price of property or services (other
than such obligations accrued in the ordinary course), to the extent that the same would be required to be shown as a long term
liability on a balance sheet prepared in accordance with GAAP, (e) all capitalized lease obligations of such Person, (f) the principal
component of all obligations, contingent or otherwise, of such Person as an account party in respect of letters of credit, (g)
the principal component of all obligations of such Person in respect of bankers’ acceptances and (h) all guarantees by such
Person of Indebtedness described in clauses (a) through (g) above; provided that, in the case of the Company and its Subsidiaries,
Indebtedness shall not include trade and other ordinary-course payables, accrued expenses, and intercompany liabilities arising
in the ordinary course of business.

 

“Information”
shall have the meaning assigned to such term in Section 2.14(a).

 

“Intellectual
Property” means all patents, trademarks, service marks, trade names, copyrights, trade secrets, licenses (software or
otherwise), information, processes and similar proprietary rights necessary to the business of the Company.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	18

    	 

    

 

“Investors”
shall have the meaning assigned to such term in the preamble to this Agreement.

 

“Knowledge”
means, with respect to any statement made to a Person’s Knowledge, that such statement is based on the actual knowledge
of the executive officers of such Person (as defined in Rule 405 under the Securities Act) having responsibility for the matter
or matters that are the subject of the statement, after reasonable inquiry.

 

“Lien”
shall mean, with respect to any asset, (a) any mortgage, deed of trust, lien, hypothecation, pledge, charge, security interest
or similar monetary encumbrance in or on such asset and (b) the interest of a vendor or a lessor under any conditional sale agreement,
capital lease or title retention agreement (or any financing lease having substantially the same economic effect as any of the
foregoing) relating to such asset; provided that in no event shall an operating lease or an agreement to sell be deemed to constitute
a Lien.

 

“Material
Adverse Effect” means any change, effect, event, occurrence, state of facts or development that, individually or in
the aggregate, has had, or would reasonably be expected to have, a material adverse effect on the results of operations, assets,
business or financial condition of the Company and its Subsidiaries, taken as a whole, except that any of the following, either
alone or in combination, shall not be deemed a Material Adverse Effect: (i) effects caused by changes or circumstances affecting
the U.S. or global economy or capital markets in general or which are generally applicable to the industry in which the Company
operates, provided that such effects are not borne disproportionately by the Company or any of its Subsidiaries; (ii) effects
caused by changes in applicable law or GAAP, provided that such effects are not borne disproportionately by the Company or any
of its Subsidiaries; (iii) effects caused by changes in the market price or trading volume of the Common Stock on any trading
market (provided that the underlying causes of such changes (subject to the other provisions of this paragraph) shall not be excluded);
(iv) effects caused by failure(s) by the Company to meet any operating projections or forecasts, or published revenue or earnings
predictions (provided that the underlying causes of such failure(s) (subject to the other provisions of this paragraph) shall
not be excluded); (v) effects caused by earthquakes, hostilities, acts of war, sabotage or terrorism or military actions or any
escalation or material worsening of any such hostilities, acts of war, sabotage or terrorism or military actions existing as of
the date hereof; (vi) effects resulting from or relating to the announcement or disclosure of the sale of the Units or other transactions
contemplated by this Agreement; and (vii) effects caused by any action or failure to take action, in each case, expressly consented
to or requested by the Investors.

 

“Material
Contract” means any contract, instrument or other agreement to which the Company or any Subsidiary is a party or by
which it is bound which is material to the business of the Company and its Subsidiaries, taken as a whole, including those that
have been filed or were required to have been filed as an exhibit to the SEC Filings (as defined below) pursuant to Item 601(b)(4)
or Item 601(b)(10) of Regulation S-K.

 

“Parties”
shall have the meaning assigned to such term in the preamble to this Agreement.

 

“Permits”
shall have the meaning assigned to such term in Section 2.12(b).

 

“Person”
shall mean any natural person, corporation, business trust, joint venture, association, company, partnership, limited liability
company or government, individual or family trusts, or any agency or political subdivision thereof.

 

“Preferred
Securities” shall have the meaning assigned to such term in the recitals to this Agreement.

 

“Principal
Market” means The NYSE Mkt or other national or regional securities exchange or over the counter market on which the
Common Stock is then listed.

 

“Proposal”
means the proposal to be submitted to the stockholders of the Company at the Stockholders Meeting, for the purpose of seeking
approval of the stockholders of the Company for the issuance of all shares of Common Stock issuable upon the full conversion of
the Preferred Securities and Warrants issued pursuant to this Agreement and any change of control that may be deemed to occur
as a result of such issuance and sale pursuant to an Exchange Voting Requirement.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	19

    	 

    

 

“Proxy
Statement” shall have the meaning assigned to such term in Section 5.2(a).

 

“Purchase
Price” shall have the meaning assigned to such term in Section 1.1.

 

“Registration
Period” shall have the meaning assigned to such term in Section 5.3(a).

 

“Registration
Statement” shall have the meaning assigned to such term in Section 5.3(a).

 

“Regulation
D” shall have the meaning assigned to such term in the recitals to this Agreement.

 

“Related
Agreements” shall mean this Agreement, the schedules and exhibits attached hereto, the Certificate of Designation and
the Warrant.

 

“Release”
shall mean any spilling, leaking, seepage, pumping, pouring, emitting, emptying, discharging, injecting, escaping, leaching, dumping,
disposing, depositing, emanating or migrating in, into, onto or through the Environment.

 

“Rule
144” shall mean Rule 144 promulgated under the Securities Act.

 

“SEC”
shall have the meaning assigned to such term in the recitals of this Agreement.

 

“SEC
Filings” shall have the meaning assigned to such term in Section 2.7(a).

 

“Securities
Act” shall have the meaning assigned to such term in the recitals of this Agreement.

 

“Series
A Convertible Preferred Stock” shall mean the 12.0% Series A Convertible Preferred Stock of the Company.

 

“Stockholders
Meeting” shall have the meaning assigned to such term in Section 5.2.

 

“Subsequent
Stockholders Meeting” shall have the meaning assigned to such term in Section 5.2.

 

“Subsidiary”
shall mean, with respect to any Person (in this definition referred to as the “parent”), any corporation, partnership,
association or other business entity (a) of which securities or other ownership interests representing more than 50.0% of the
equity or more than 50.0% of the ordinary voting power or more than 50.0% of the general partnership interests are, at the time
any determination is being made, directly or indirectly, owned, Controlled or held, or (b) that is, at the time any determination
is made, otherwise Controlled, by the parent or one or more Subsidiaries of the parent or by the parent and one or more Subsidiaries
of the parent.

 

“Tax
Return” shall mean any return, report or statement required to be filed with any Governmental Authority with respect
to Taxes, including any schedules, attachments or amendments thereto.

 

“Taxes”
shall mean any and all present or future taxes, duties, levies, imposts, assessments, deductions, withholdings or other similar
charges imposed by any Governmental Authority, whether computed on a separate, consolidated, unitary, combined or other basis
and any interest, fines, penalties or additions to tax with respect to the foregoing.

 

“Transactions”
shall mean, collectively, the transactions to occur pursuant to the Related Agreements, including (a) the execution and filing
of the Certificate of Designation with the Secretary of State of the State of Delaware and the performance by the Company of its
obligations thereunder and the execution, delivery and performance of each other Related Agreement, the payment of the Purchase
Price and the purchase and sale of the Units under this Agreement; and (b) the payment of all fees and expenses to be paid and
owing in connection with the foregoing.

 

“Units”
shall have the meaning assigned to such term in the recitals to this Agreement.

 

“Warrants”
shall have the meaning assigned to such term in the recitals to this Agreement.

 

    	HUSA – Securities Purchase Agr – Series B Preferred	20

    	 

    

 

Section
7.2 Construction. The Parties intend that each representation, warranty, covenant and agreement contained in this Agreement
shall have independent significance. The headings are for convenience only and shall not be given effect in interpreting this
Agreement. References to sections, articles, schedules or exhibits are to the sections, articles, schedules and exhibits contained
in, referred to by or attached to this Agreement, unless otherwise specified. The words “hereof,” “herein”
and “hereunder” and words of similar import, when used in this Agreement, refer to this Agreement as a whole and not
to any particular provision of this Agreement. The words “include,” “includes” and “including”
in this Agreement mean “include/includes/including without limitation.” All references to “$”, currency,
monetary values and dollars set forth herein shall mean U.S. dollars. The use of the masculine, feminine or neuter gender or the
singular or plural form of words shall not limit any provisions of this Agreement. References to a Person also include its permitted
assigns and successors. The word “will” shall be construed to have the same meaning as the word “shall.”
The words “to the extent” shall mean the degree to which a subject or other thing extends, and such phrase shall not
mean simply “if.” With respect to the determination of any period of time, “from” shall mean “from
and including.” The word “or” shall not be exclusive. Any reference to a statute refers to the statute, any
amendments or successor legislation and all rules and regulations promulgated under or implementing the statute, as in effect
at the relevant time. The word “extent” in the phrase “to the extent” shall mean the degree to which a
subject or other thing extends, and such phrase shall not mean simply “if.” Whenever this Agreement refers to a number
of days, such number shall refer to calendar days unless Business Days are specified. Whenever any action must be taken hereunder
on or by a day that is not a Business Day, then such action may be validly taken on or by the next day that is a Business Day.
Any reference herein to any law, contract, agreement or other instrument, including the governing documents of any Person, shall
be construed as referring to such law, contract, agreement or instrument as amended or modified or, in the case of a law, codified
or reenacted, in each case, in whole or in part, and as in effect from time to time. The Parties acknowledge and agree that (a)
each Party and its counsel has reviewed, or has had the opportunity to review, the terms and provisions of this Agreement, (b)
any rule of construction to the effect that any ambiguities are resolved against the drafting Party shall not be used to interpret
this Agreement and (c) the provisions of this Agreement shall be construed fairly as to all Parties and not in favor of or against
any Party, regardless of which Party was generally responsible for the preparation of this Agreement and no presumption or burden
of proof shall arise favoring or disfavoring any Party by virtue of such previous drafts of this Agreement or any other Related
Agreements or the fact that any clauses have been added, deleted or otherwise modified from any prior drafts of this Agreement
or any other Related Agreements.

 

IN
WITNESS WHEREOF, the Parties have caused this Agreement to be duly executed and delivered as of the date first above written.

 

	 	COMPANY:
	 	 
	 	HOUSTON
    AMERICAN ENERGY CORP.
	 	 
	 	 
	 	By:	
	 	Name:	John P. Boylan
	 	Title:	President and Chief Executive Officer

 

	INVESTOR:	 	INVESTOR
    NOTICE ADDRESS:
	 	 	 
	Name:	 	 	Address:	 
	 	 	 	 	 
	By:	 	 	 	 
	 	Name:
    	 	E-Mail:	 
	 	Title:
    	 	 	 
	 	 	 	 	 
	Units
    Purchased:	 	Units	 
	 	 	 	 	 
	Purchase
    Price ($1,000 per Unit)	$	 	 	 	 
	 	 	 	 	 	 	 

 

    	HUSA – Securities Purchase Agr – Series B Preferred	21

    	 

    

 

Annex
A

Units and Investors

 

	Investor	 	Units	 	Purchase

        Price

	 	 	 	 	$
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	 	 	 	 	 
	TOTAL:	 	 	 	$Exhibit

MEDIDATA SOLUTIONS, INC. 2017 PERFORMANCE-BASED 
RESTRICTED STOCK UNIT AGREEMENT 
THIS AGREEMENT is made as of February 23rd, 2017, by and between MEDIDATA SOLUTIONS, INC. (the “Company”), and _______________ (the “Participant”). 
1.Award. In accordance with the Medidata Solutions, Inc. 2009 Long-Term Incentive Plan (the “Plan”), the Company hereby grants to the Participant a target incentive award for a total of _______________ (the “Target Number”) performance-based restricted stock units (“PBRSUs”). Each PBRSU represents a contingent right to receive one share of the Company’s common stock (a “Share”). Capitalized terms used but not defined in this Agreement shall have the meanings ascribed to them by the Plan.
2.    Certain Defined Terms. The following capitalized terms shall have the meanings set forth below for the purposes of determining the number of PBRSUs earned by the Participant under Section 3 and Exhibits A and B of this Agreement. 
(a)     “Company TSR” means, the percentage difference (positive or negative) between (i) the Value per Share on January 1, 2017, and (ii) the sum of (A) the Value per Share on the last day of the Performance Period, plus (B) the amount of any dividends (including the cash value of non-cash dividends) paid or payable with respect to such share during such period. For this purpose, dividends will be taken into account on the ex-dividend date.
(b)    “Material Acquisition” means (x) any acquisition (including by way of merger or consolidation) of assets comprising all or substantially all of a business or constituting all or substantially all of the common stock of a company that (y) generates revenue greater than seven percent (7%) of the Company's revenue for the full fiscal year prior to the acquisition date.
(c)    “Net Income” means, for any period, the net income (or loss) of the Company during such period, calculated on a consolidated basis in accordance with GAAP; provided that there shall be excluded from such net income (to the extent otherwise included therein) the net income (or loss) related to any Material Acquisition of the Company.
(d)    “Net Income Performance Percentage” means the percentage determined under the table set forth in Exhibit B, based upon the Company’s Net Income attainment for the year ending December 31, 2019.
(e)    “Net Income Target Number” means 50% of the Target Number.
(f)    “Performance Period” means the period starting on January 1, 2017 and ending on December 31, 2019.
(g)    “Russell Index TSR” means the percentage difference (positive or negative) between (i) the Value per share of the most widely publicly traded class of stock of each 

1

company in the Russell 2000 Index on January 1, 2017, and (ii) the sum of (A) the Value per share of such stock on the last day of the Performance Period, plus (B) the amount of any dividends (including the cash value of non-cash dividends) paid or payable with respect to such share during such period. For this purpose, dividends will be taken into account on the ex-dividend date. 
(h)    “TSR Performance Percentage” means the percentage determined under the table set forth in Exhibit A, based upon the difference (positive or negative) between the Company TSR and the 50th percentile of the Russell Index TSRs during the Performance Period. 
(i)    “TSR Target Number” means 50% of the Target Number.
(j)    “Value” means, with respect to the stock of either the Company or a company in the Russell 2000 Index: (i) as of January 1, 2017, the average closing price per share for the preceding thirty trading days; and (ii) as of the last day of the Performance Period, the average closing price per share for the last thirty trading days of such Performance Period.
3.    Earning of PBRSUs. The Participant will earn a number of PBRSUs with 50% of the PBRSUs earned based on TSR Performance and 50% of the PBRSUs earned based on Net Income Performance.  The number of PBRSUs earned for TSR Performance shall be equal to the product of (i) the TSR Performance Percentage determined under Exhibit A (which may range from 0% to 200%), multiplied by (ii) the Participant’s TSR Target Number.   The number of PBRSUs earned for Net Income Performance shall be equal to the product of (i) the Net Income Performance Percentage determined under Exhibit B (which may range from 0% to 200%), multiplied by (ii) the Participant’s Net Income Target Number.   
The number of PBRSUs (if any) earned by the Participant will be determined as soon as practicable after the end of the Performance Period by the Compensation Committee of the Company’s Board of Directors (the “Committee”), acting in accordance with this Agreement (including Exhibits A and B) and the Plan. All such determinations will be evidenced in writing by the Committee and will be final and binding on the Company, the Participant and any other interested persons. PBRSUs earned by the Participant under this Agreement will be settled in the form of Shares and/or cash in accordance with Section 5 below. 
4.    Termination of Employment During the Performance Period; Effect of a Sale Event. 
(a)    General. If the Participant’s employment terminates during the Performance Period, then, except as otherwise specified in this Section 4, the Participant will earn no PBRSUs, and this Agreement will thereupon terminate and be of no further force or effect. For the purposes of this Agreement, the Participant’s employment will be considered terminated if (and only if) the Participant is no longer employed by or providing services to the Company or any of its subsidiaries. 

2

(b)    Termination Due to Death or Disability. If, prior to the end of the Performance Period, the Participant’s employment terminates by reason of the Participant’s death or the Company terminates the Participant’s employment by reason of “Disability” (as defined below), then the Participant will be deemed to have earned a pro-rata portion of the number of PBRSUs, if any, that the Participant would have earned under this Agreement for such Performance Period (including, if applicable, pursuant to Section 4(c) below) if the Participant’s employment had continued through the end of the Performance Period, based upon the ratio of (i) the number of full months elapsed from the first day of the Performance Period to the date the Participant’s employment terminated, to (ii) 36.   For the purpose of this Agreement, the term “Disability” means the inability of the Participant to perform the essential duties of the Participant’s employment with the Company or a subsidiary for a period of 120 consecutive days or an aggregate of 180 days during any twelve-month period, by reason of a physical or mental illness or injury, as determined in the good faith by the Committee acting in accordance with its discretionary authority under the Plan. 
(c)    Effect of a Sale Event. If a Sale Event (as defined in the Plan) occurs during the Performance Period, then the Performance Period will end on the day preceding the Sale Event and, if the Participant’s employment has not previously terminated, the Participant will be deemed to have earned a number of PBRSUs equal to the sum of:
(i)    a number of TSR-based PBRSUs equal to (A x B), where—
A = the TSR Target Number; and
B = the TSR Performance Percentage determined under the table in Exhibit A, based upon the Company TSR and the Russell Index TSRs for the period beginning January 1, 2017 and ending on the day preceding the date of the Sale Event; plus
(ii) the Net Income Target Number.
Immediately prior to the Sale Event, the PBRSUs that are deemed to have been earned pursuant to this Section 4(c) shall be converted into the right to receive an amount of cash and/or a number of freely tradable shares of common stock of the acquiring or successor company or parent thereof having a value equal to the Sale Event transaction value of the Shares covered by such PBRSUs as if such Shares were issued and outstanding at the time of the Sale Event.  If the settlement obligation with respect to such converted PBRSUs is assumed by the successor or acquiring company as part of the Sale Event transaction, the Participant’s right to receive such cash payment and/or shares of common stock will be conditioned upon the Participant’s continuing employment or service with the successor or acquiring company through the end of the Performance Period, provided that, if the Participant’s employment or service is terminated before the end of the Performance Period by the Company without Cause (as such term is defined in Medidata’s Executive Change in Control Agreement), by the Participant for Good Reason (as such term is defined in Medidata’s Executive Change in Control Agreement) or by reason of the Participant’s death, then the continuing service condition will thereupon be waived and the Participant will be 

3

entitled to immediate payment of such cash and/or shares in full and final settlement of the converted PBRSUs, and provided further that, if the Participant’s employment or service is terminated before the end of the Performance Period for any other reason, the Participant will thereupon forfeit any and all interest in and rights with respect to such converted PBRSUs. If the settlement obligation with respect to such PBRSUs is not assumed by the successor or acquiring company, then the converted PBRSUs will be deemed to be fully vested and will be settled upon and as part of the Sale Transaction.  
5.    Settlement of Earned PBRSUs; Rights as a Shareholder. 
(a)    General. The PBRSUs earned by the Participant for the Performance Period (including a short Performance period resulting from a Sale Event) will be settled in accordance with this Section 5 as soon as practicable after the end of the Performance Period (but in no event later than March 15 of the following calendar year). At the time of settlement, the Company will issue and deliver to the Participant the Shares represented by such earned PBRSUs in certificated or electronic form. Unless an insider trading blackout period is in effect and absent other extraordinary circumstances, the Company intends to complete the settlement promptly after the Committee determines the number of PBRSUs that are earned for the Performance Period. Notwithstanding the foregoing, if a Sale Event occurs, any earned PBRSUs that have not previously been settled (including any PBRSUs deemed to have been earned prior to the Sale Event pursuant to Section 4(c) above) will be settled (if at all) at the time and in the manner prescribed in Section 4(c).
(b)    Tax Withholding. As a condition of the issuance of Shares under this Agreement, the Company shall require the Participant to satisfy any applicable tax withholding obligations. Toward that end, the Company and its Subsidiaries may require the Participant to remit an amount sufficient to satisfy such withholding obligations or deduct or withhold such amount from any payments otherwise owed the Participant (whether or not under this Agreement or the Plan). The Participant expressly authorizes the Company to deduct from any compensation or any other payment of any kind due to the Participant, including (if the Company so consents) withholding Shares that would otherwise be issued to the Participant in settlement of vested PBRSUs, for the amount of any such tax withholding obligations, provided, however, that the value of any Shares withheld may not exceed the statutory minimum withholding amount required by law. 
(c)    Rights as a Shareholder. The Participant shall have no voting or other rights of a shareholder with respect to the Shares covered by PBRSUs unless and until such Shares are issued to the Participant in accordance with the provisions hereof. 
6.    Transfer Restrictions. The Participant may not sell, assign, transfer, pledge, hedge, hypothecate, encumber or dispose of in any way (whether by operation of law or otherwise) any of the Participant’s rights under this Agreement, and none of such rights shall be subject to execution, attachment or similar process. Any attempt by the Participant or any other person claiming against, through or under the Participant to cause any of the Participant’s rights under this Agreement to be transferred or assigned in any manner shall be null and void and without effect upon the Company, the Participant or any other person. 

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Notwithstanding the foregoing, if the Participant dies on or after the date that any PBRSUs have been earned and determined and before the settlement of such earned PBRSUs, the settlement will be made to the Participant’s Beneficiary (as determined under the Plan). 
7.    Provisions of the Plan Control; Effect of Other Agreements. This Agreement shall be subject to the provisions of the Plan and to such rules, regulations and interpretations as may be established or made by the Committee acting within the scope of its authority under the Plan. The Participant acknowledges receipt of a copy of the Plan prior to the execution of this Agreement. If and to the extent that any provision of this Agreement (including the Plan, as it applies to this Agreement) is inconsistent with any provision of any employment, separation, change in control or other agreement between the Company or a subsidiary and the Participant in effect at any time or from time to time, the terms of this Agreement (including the Plan, as it applies to this Agreement) shall govern. 
8.    No Employment Rights. Nothing contained herein or in the Plan shall confer upon the Participant any right with respect to the continuation of the Participant’s employment or other service with the Company or a subsidiary or interfere in any way with the right of the Company and its subsidiaries at any time to terminate such employment or other service or to increase or decrease, or otherwise adjust, the Participant’s compensation and any other terms and conditions of the Participant’s employment or other service. 
9.    Recoupment. The Participant’s rights with respect to this award shall in all events be subject to (a) any right that the Company may have under any Company recoupment, claw back and/or forfeiture policy of the Company as in effect from time to time, and (b) any right or obligation the Company may have regarding the claw back of “incentive-based compensation” under the requirements of the Dodd-Frank Wall Street Reform and Consumer Protection Act or other applicable securities law or the listing requirements of any national securities exchange on which the Company’s Shares are listed. 
10.    Committee Determinations Final. The Committee shall have complete discretion in the exercise of its authority, powers, and duties under the Plan and this Agreement. Any determination made by the Committee with respect to this Agreement and the Plan shall be final, conclusive, and binding on all interested persons. The Committee may designate any individual or individuals to perform any of its ministerial functions to be performed hereunder. 
11.    Successors. This Agreement shall be binding upon and inure to the benefit of the Company any of its successors and assigns, as well as the Participant and, if applicable, the Participant’s surviving spouse or estate. For the avoidance of doubt, if a Sale Event occurs, the term “Company” shall be deemed to include the successor or acquiring company, any parent company and any of its or their affiliates.
12.    Entire Agreement. This Agreement (including Exhibits A and B) constitutes the entire agreement between the parties with respect to the subject matter hereof and may not be amended, except as provided in the Plan, other than by a written instrument executed by the parties hereto. 

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13.    Governing Law. All rights and obligations under this Agreement and the Plan shall be governed by and construed in accordance with the laws of the State of Delaware, without regard to its principles of conflict of laws. 
14.    Counterparts. This Agreement may be executed in separate counterparts, each of which will be an original and all of which taken together shall constitute one and the same agreement. 
PARTICIPANT ACKNOWLEDGES THAT HE OR SHE HAS READ THIS AGREEMENT, UNDERSTANDS IT AND AGREES TO BE BOUND BY ITS TERMS.
 

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EXHIBIT A 
 
TSR PERFORMANCE PERCENTAGE 
This Exhibit A is attached to and made a part of the Participant’s 2017 Performance-Based Restricted Stock Unit Agreement (the “Agreement”). Capitalized terms that are used but not defined in this Exhibit A will have the meanings ascribed to them in the main body of the Agreement, including with respect to the factors used in this Exhibit. 
The number of PBRSUs the Participant will earn for the Performance Period based on the Company’s TSR performance (subject to the provisions of the Agreement) will be expressed as a percentage (from 0% to 200%) of the Participant’s TSR Target Number. That percentage is called the TSR Performance Percentage. 
The TSR Performance Percentage for the Performance Period is determined under the following table, based upon the difference (positive or negative) between the Company TSR for the Performance Period and the 50th percentile of the Russell Index TSRs for that same period. If, the difference between the Company TSR and the 50th percentile of the Russell Index TSRs is above one specified level and below another level, then the TSR Performance Percentage for the Performance Period will be increased accordingly by linear interpolation between the two levels. 
 
TSR PERFORMANCE 
PERCENTAGE TABLE
	
				
	Difference Between Company TSR and the 50th Percentile of Russell Index TSRs
	TSR Performance Percentage
	Difference Between Company TSR and the 50th Percentile of Russell Index TSRs
	TSR Performance Percentage

	25% or more
	200%
	-5%
	90%

	20%
	180%
	-10%
	80%

	15%
	160%
	-15%
	70%

	10%
	140%
	-20%
	60%

	5%
	120%
	-25%
	50%

	0%
	100%
	-30% or more
	0%

Example. Participant X receives a 2017 PBRSU award for a total Target Number of 2,000 shares, the Participant’s TSR Target Number is 1,000 shares (50% of the 1,000 share Target Number).

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(a)    Using the above table, if the Company TSR for the Performance Period is 10% higher than the 50th percentile of the Russell 2000 Index TSRs for the same period, then the TSR Performance Percentage will be 140%. As such, X will earn a total of 1,400 PBRSUs (1,000 x 140%) on account of the Company’s TSR performance. 
(b)    If the Company TSR for the Performance Period is 25% or more than the 50th percentile of the Russell Index TSRs for the same period, then the TSR Performance Percentage for 2017 will be 200% and X will earn a total of 2,000 PBRSUs for the Performance Period (1,000 x 200%) on account of the Company’s TSR performance. 
(c)    If the Company TSR for the Performance Period is 15% less than the 50th percentile of the Russell Index TSRs for the same period, then the TSR Performance Percentage will be 70%, and X will earn a total of 700 PBRSUs on account of the Company’s TSR performance.
Note that the TSR Performance Percentage will be based on the cumulative Company TSR relative to the 50th percentile of the cumulative Russell Index TSRs during the Performance Period.

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EXHIBIT B
 
NET INCOME PERFORMANCE PERCENTAGE 
This Exhibit B is attached to and made a part of the Participant’s 2017 Performance-Based Restricted Stock Unit Agreement (the “Agreement”). Capitalized terms that are used but not defined in this Exhibit B will have the meanings ascribed to them in the main body of the Agreement, including with respect to the factors used in this Exhibit.
The number of PBRSUs the Participant will earn for the Performance Period based upon the Company’s Net Income (subject to the provisions of the Agreement) will be expressed as a percentage (from 0% to 200%) of the Participant’s Net Income Target Number. That percentage is called the Net Income Performance Percentage. 
The Net Income Performance Percentage is determined under the following table, based upon based upon the Company’s Net Income attainment for the year ending December 31, 2019.  If, the Company’s Net Income attainment for that year is above one specified level and below another level, then the Net Income Performance Percentage will be increased accordingly by linear interpolation between the two levels. 

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NET INCOME PERFORMANCE 
PERCENTAGE TABLE
	
			
	Net Income
	Target
Attainment

	2019
(USD million)
	CAGR
(’16 – ’19)

	30.0
	1%
	0%

	31.0
	2%
	8%

	31.9
	3%
	16%

	32.9
	4%
	24%

	34.0
	5%
	32%

	35.0
	6%
	40%

	40.0
	11%
	50%

	41.0
	12%
	52%

	42.1
	13%
	54%

	43.2
	14%
	57%

	44.3
	15%
	59%

	45.4
	16%
	61%

	46.6
	17%
	63%

	47.7
	18%
	66%

	48.9
	19%
	68%

	50.1
	20%
	70%

	51.3
	21%
	73%

	52.6
	22%
	77%

	53.9
	23%
	80%

	55.3
	24%
	90%

	56.6
	25%
	100%

	58.0
	26%
	120%

	59.4
	27%
	140%

	60.8
	28%
	160%

	62.2
	29%
	180%

	63.7
	30%
	200%

 

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