Exhibit 10.1


 


PURCHASE AGREEMENT


 


PURCHASE AGREEMENT (the “Agreement”),
dated as of November 8, 2019, by and between HUMANIGEN, INC., a Delaware corporation (the “Company”),
and LINCOLN PARK CAPITAL FUND, LLC, an Illinois limited liability company (the “Investor”).


 


WHEREAS: 


 


Subject to the terms and conditions
set forth in this Agreement, the Company wishes to sell to the Investor, and the Investor wishes to buy from the Company, up to
Twenty Million Dollars ($20,000,000) of the Company's common stock, $0.001 par value per share (the "Common Stock").
The shares of Common Stock to be purchased hereunder are referred to herein as the "Purchase Shares."


 


NOW THEREFORE, in consideration of
the mutual covenants contained in this Agreement, and for other good and valuable consideration, the receipt and adequacy of which
are hereby acknowledged, the Company and the Investor hereby agree as follows:


 


		1.	CERTAIN DEFINITIONS.



 


For purposes of this Agreement, the
following terms shall have the following meanings:


 


(a)          “Accelerated
Purchase Date” means, with respect to any Accelerated Purchase made pursuant to Section 2(b) hereof, the Business
Day immediately following the applicable Purchase Date with respect to the corresponding Regular Purchase referred to in Section
2(b) hereof.


 


(b)          “Accelerated
Purchase Floor Price” means $0.15, which shall be appropriately adjusted for any reorganization, recapitalization, non-cash
dividend, stock split or other similar transaction and, effective upon the consummation of any such reorganization, recapitalization,
non-cash dividend, stock split or other similar transaction, the Accelerated Purchase Floor Price shall mean the lower of
(i) the adjusted price and (ii) $1.00.


 


(c)          “Accelerated
Purchase Minimum Price Threshold” means, with respect to any Accelerated Purchase made pursuant to Section 2(b)
hereof, the greater of (i) seventy-five percent (75%) of the Closing Sale Price of the Common Stock on the applicable Purchase
Date with respect to the corresponding Regular Purchase referred to in Section 2(b) hereof and (ii) the minimum per share
price threshold set forth by the Company in the applicable Accelerated Purchase Notice.


 


(d)          “Accelerated
Purchase Notice” means, with respect to an Accelerated Purchase made pursuant to Section 2(b) hereof, an irrevocable
written notice from the Company to the Investor directing the Investor to purchase the applicable Accelerated Purchase Share Amount
at the Accelerated Purchase Price on the Accelerated Purchase Date for such Accelerated Purchase in accordance with this Agreement.


 


(e)          “Accelerated
Purchase Price” means, with respect to an Accelerated Purchase made pursuant to Section 2(b) hereof, the lower
of (i) ninety-five percent (95%) of the VWAP for the period beginning at 9:30:01 a.m., Eastern time, on the applicable Accelerated
Purchase Date, or such other time publicly announced by Principal Market as the official open (or commencement) of trading on the
Principal Market on such applicable Accelerated Purchase Date (the “Accelerated Purchase Commencement Time”),
and ending at the earliest of (A) 4:00:00 p.m., Eastern time, on such applicable Accelerated Purchase Date, or such other time
publicly announced by Principal Market as the official close of trading on the Principal Market on such applicable Accelerated
Purchase Date, (B) such time, from and after the Accelerated Purchase Commencement Time for such Accelerated Purchase, that total
number (or volume) of shares of Common Stock traded on the Principal Market has exceeded the applicable Accelerated Purchase Share
Volume Maximum, and (C) such time, from and after the Accelerated Purchase Commencement Time for such Accelerated Purchase, that
the Sale Price has fallen below the applicable Accelerated Purchase Minimum Price Threshold (such earliest of (i)(A), (i)(B) and
(i)(C) above, the “Accelerated Purchase Termination Time”), and (ii) the Closing Sale Price of the Common Stock
on such applicable Accelerated Purchase Date (to be appropriately adjusted for any reorganization, recapitalization, non-cash dividend,
stock split, reverse stock split or other similar transaction).


 



    	 	 	 



    	 



    

 


(f)           “Accelerated
Purchase Share Amount” means, with respect to an Accelerated Purchase made pursuant to Section 2(b) hereof, the
number of Purchase Shares directed by the Company to be purchased by the Investor in an Accelerated Purchase Notice, which number
of Purchase Shares shall not exceed the lesser of (i) 300% of the number of Purchase Shares directed by the Company to be purchased
by the Investor pursuant to the corresponding Regular Purchase Notice for the corresponding Regular Purchase referred to in Section
2(b) hereof (subject to the Purchase Share limitations contained in Section 2(a) hereof) and (ii) an amount equal to
(A) the Accelerated Purchase Share Percentage multiplied by (B) the total number (or volume) of shares of Common Stock traded on
the Principal Market during the period on the applicable Accelerated Purchase Date beginning at the Accelerated Purchase Commencement
Time for such Accelerated Purchase and ending at the Accelerated Purchase Termination Time for such Accelerated Purchase.


 


(g)          “Accelerated
Purchase Share Percentage” means, with respect to an Accelerated Purchase made pursuant to Section 2(b) hereof,
thirty percent (30%).


 


(h)          “Accelerated
Purchase Share Volume Maximum” means, with respect to an Accelerated Purchase made pursuant to Section 2(b) hereof,
a number of shares of Common Stock equal to (i) the applicable Accelerated Purchase Share Amount properly directed by the Company
to be purchased by the Investor in the applicable Accelerated Purchase Notice for such Accelerated Purchase, divided by (ii) the
Accelerated Purchase Share Percentage (to be appropriately adjusted for any reorganization, recapitalization, non-cash dividend,
stock split, reverse stock split or other similar transaction).


 


(i)           “Additional
Accelerated Purchase Date” means, with respect to an Additional Accelerated Purchase made pursuant to Section 2(c)
hereof, the Business Day (i) that is the Accelerated Purchase Date with respect to the corresponding Accelerated Purchase referred
to in Section 2(c) hereof and (ii) on which the Investor receives, prior to 1:00 p.m., Eastern time, on such Business Day,
a valid Additional Accelerated Purchase Notice for such Additional Accelerated Purchase in accordance with this Agreement.


 


(j)           “Additional
Accelerated Purchase Floor Price” means $0.15, which shall be appropriately adjusted for any reorganization, recapitalization,
non-cash dividend, stock split or other similar transaction and, effective upon the consummation of any such reorganization, recapitalization,
non-cash dividend, stock split or other similar transaction, the Additional Accelerated Purchase Floor Price shall mean the lower
of (i) the adjusted price and (ii) $1.00.


 


(k)          “Additional
Accelerated Purchase Minimum Price Threshold” means, with respect to an Additional Accelerated Purchase made pursuant
to Section 2(c) hereof, the greater of (i) seventy-five percent (75%) of the Closing Sale Price of the Common Stock on the
Business Day immediately preceding the applicable Additional Accelerated Purchase Date with respect to such Additional Accelerated
Purchase and (ii) the minimum per share price threshold set forth by the Company in the applicable Additional Accelerated Purchase
Notice.


 



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(l)           “Additional
Accelerated Purchase Notice” means, with respect to an Additional Accelerated Purchase made pursuant to Section 2(c)
hereof, an irrevocable written notice from the Company to the Investor directing the Investor to purchase the applicable Additional
Accelerated Purchase Share Amount at the Additional Accelerated Purchase Price for such Additional Accelerated Purchase in accordance
with this Agreement.


 


(m)         “Additional
Accelerated Purchase Price” means, with respect to an Additional Accelerated Purchase made pursuant to Section 2(c)
hereof, the lower of (i) ninety-five percent (95%) of the VWAP for the period on the applicable Additional Accelerated Purchase
Date, beginning at the latest of (A) the applicable Accelerated Purchase Termination Time with respect to the corresponding Accelerated
Purchase referred to in Section 2(c) hereof on such Additional Accelerated Purchase Date, (B) the applicable Additional
Accelerated Purchase Termination Time with respect to the most recently completed prior Additional Accelerated Purchase on such
Additional Accelerated Purchase Date, as applicable, and (C) the time at which all Purchase Shares subject to all prior Accelerated
Purchases and Additional Accelerated Purchases (as applicable), including, without limitation, those that have been effected on
the same Business Day as the applicable Additional Accelerated Purchase Date with respect to which the applicable Additional Accelerated
Purchase relates, have theretofore been received by the Investor as DWAC Shares in accordance with this Agreement (such latest
of (i)(A), (i)(B) and (i)(C) above, the “Additional Accelerated Purchase Commencement Time”), and ending at
the earliest of (X) 4:00 p.m., Eastern time, on such Additional Accelerated Purchase Date, or such other time publicly announced
by Principal Market as the official close of trading on the Principal Market on such Additional Accelerated Purchase Date, (Y)
such time, from and after the Additional Accelerated Purchase Commencement Time for such Additional Accelerated Purchase, that
total number (or volume) of shares of Common Stock traded on the Principal Market has exceeded the applicable Additional Accelerated
Purchase Share Volume Maximum, and (Z) such time, from and after the Additional Accelerated Purchase Commencement Time for such
Additional Accelerated Purchase, that the Sale Price has fallen below the applicable Additional Accelerated Purchase Minimum Price
Threshold (such earliest of (i)(X), (i)(Y) and (i)(Z) above, the “Additional Accelerated Purchase Termination Time”),
and (ii) the Closing Sale Price of the Common Stock on such Additional Accelerated Purchase Date (to be appropriately adjusted
for any reorganization, recapitalization, non-cash dividend, stock split, reverse stock split or other similar transaction).


 


(n)          “Additional
Accelerated Purchase Share Amount” means, with respect to an Additional Accelerated Purchase made pursuant to Section
2(c) hereof, the number of Purchase Shares directed by the Company to be purchased by the Investor on an Additional Accelerated
Purchase Notice, which number of Purchase Shares shall not exceed the lesser of (i) 300% of the number of Purchase Shares directed
by the Company to be purchased by the Investor pursuant to the corresponding Regular Purchase Notice for the corresponding Regular
Purchase referred to in Section 2(c) hereof (subject to the Purchase Share limitations contained in Section 2(a)
hereof) and (ii) an amount equal to (A) the Additional Accelerated Purchase Share Percentage multiplied by (B) the total number
(or volume) of shares of Common Stock traded on the Principal Market during the period on the applicable Additional Accelerated
Purchase Date beginning at the Additional Accelerated Purchase Commencement Time for such Additional Accelerated Purchase and ending
at the Additional Accelerated Purchase Termination Time for such Additional Accelerated Purchase.


 


(o)          “Additional
Accelerated Purchase Share Percentage” means, with respect to an Additional Accelerated Purchase made pursuant to Section
2(c) hereof, thirty percent (30%).


 



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(p)          “Additional
Accelerated Purchase Share Volume Maximum” means, with respect to an Additional Accelerated Purchase made pursuant to
Section 2(c) hereof, a number of shares of Common Stock equal to (i) the applicable Additional Accelerated Purchase Share
Amount properly directed by the Company to be purchased by the Investor in the applicable Additional Accelerated Purchase Notice
for such Additional Accelerated Purchase, divided by (ii) the Additional Accelerated Purchase Share Percentage (to be appropriately
adjusted for any reorganization, recapitalization, non-cash dividend, stock split, reverse stock split or other similar transaction).


 


(q)          “Alternate
Adjusted Regular Purchase Share Limit” means, with respect to a Regular Purchase made pursuant to Section 2(a)
hereof, the maximum number of Purchase Shares which, taking into account the applicable per share Purchase Price therefor calculated
in accordance with this Agreement, would enable the Company to deliver to the Investor, on the applicable Purchase Date for such
Regular Purchase, a Regular Purchase Notice for a Purchase Amount equal to, or as closely approximating without exceeding, Seventy-Five
Thousand Dollars ($75,000).


 


(r)          
“Available Amount” means, initially, Twenty Million Dollars ($20,000,000) in the aggregate, which amount shall
be reduced by the Purchase Amount each time the Investor purchases shares of Common Stock pursuant to Section 2 hereof.


 


(s)          “Bankruptcy
Law” means Title 11, U.S. Code, or any similar federal or state law for the relief of debtors.


 


(t)           “Business
Day” means any day on which the Principal Market is open for trading, including any day on which the Principal Market
is open for trading for a period of time less than the customary time.


 


(u)          “Closing
Sale Price” means, for any security as of any date, the closing sale price for such security on the Principal Market
as reported by the Principal Market.


 


(v)          “Confidential
Information” means any information disclosed by either party to the other party, either directly or indirectly, in writing,
orally or by inspection of tangible objects (including, without limitation, documents, prototypes, samples, plant and equipment),
which is designated as "Confidential," "Proprietary" or some similar designation. Information communicated
orally shall be considered Confidential Information if such information is confirmed in writing as being Confidential Information
within ten (10) Business Days after the initial disclosure. Confidential Information may also include information disclosed to
a disclosing party by third parties. Confidential Information shall not, however, include any information which (i) was publicly
known and made generally available in the public domain prior to the time of disclosure by the disclosing party; (ii) becomes publicly
known and made generally available after disclosure by the disclosing party to the receiving party through no action or inaction
of the receiving party; (iii) is already in the possession of the receiving party without confidential restriction at the time
of disclosure by the disclosing party as shown by the receiving party’s files and records immediately prior to the time of
disclosure; (iv) is obtained by the receiving party from a third party without a breach of such third party’s obligations
of confidentiality; (v) is independently developed by the receiving party without use of or reference to the disclosing party’s
Confidential Information, as shown by documents and other competent evidence in the receiving party’s possession; or (vi)
is required by law to be disclosed by the receiving party, provided that the receiving party gives the disclosing party prompt
written notice of such requirement prior to such disclosure and assistance in obtaining an order protecting the information from
public disclosure.


 


(w)         “Custodian”
means any receiver, trustee, assignee, liquidator or similar official under any Bankruptcy Law.


 



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(x)          “DTC”
means The Depository Trust Company, or any successor performing substantially the same function for the Company.


 


(y)          “DWAC
Shares” means shares of Common Stock that are (i) issued in electronic form, (ii) freely tradable and transferable and
without restriction on resale and (iii) timely credited by the Company to the Investor’s or its designee’s specified
Deposit/Withdrawal at Custodian (DWAC) account with DTC under its Fast Automated Securities Transfer (FAST) Program, or any similar
program hereafter adopted by DTC performing substantially the same function.


 


(z)           “Exchange
Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.


 


(aa)        “Floor Price”
means $0.15, which shall be appropriately adjusted for any reorganization, recapitalization, non-cash dividend, stock split or
other similar transaction and, effective upon the consummation of any such reorganization, recapitalization, non-cash dividend,
stock split or other similar transaction, the Floor Price shall mean the lower of (i) the adjusted price and (ii) $0.15.


 


(bb)       “Fully Adjusted
Regular Purchase Share Limit” means, with respect to any reorganization, recapitalization, non-cash dividend, stock split
or other similar transaction from and after the date of this Agreement, the Regular Purchase Share Limit (as defined in Section
2(a) hereof) in effect on the applicable date of determination, after giving effect to the full proportionate adjustment thereto
made pursuant to Section 2(a) hereof for or in respect of such reorganization, recapitalization, non-cash dividend, stock
split or other similar transaction.


 


(cc)        “Material Adverse
Effect” means any material adverse effect on (i) the enforceability of any Transaction Document, (ii) the results
of operations, assets, business or financial condition of the Company and its Subsidiaries, taken as a whole, other than any material
adverse effect that resulted exclusively from (A) any change in the United States or foreign economies or securities or financial
markets in general that does not have a disproportionate effect on the Company and its Subsidiaries, taken as a whole, (B) any
change that generally affects the industry in which the Company and its Subsidiaries operate that does not have a disproportionate
effect on the Company and its Subsidiaries, taken as a whole, (C) any change arising in connection with earthquakes, hurricanes,
wildfires, tornadoes, 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, (D) any action
taken by the Investor, its affiliates or its or their successors and assigns with respect to the transactions contemplated by this
Agreement, (E) the effect of any change in applicable laws or accounting rules that does not have a disproportionate effect
on the Company and its Subsidiaries, taken as a whole, or (F) any change resulting from compliance with terms of this Agreement
or the consummation of the transactions contemplated by this Agreement, or (iii) the Company’s ability to perform in
any material respect on a timely basis its obligations under any Transaction Document to be performed as of the date of determination.


 


(dd)       “Maturity Date”
means the first day of the month immediately following the thirty-six (36) month anniversary of the Commencement Date.


 


(ee)        “PEA Period”
means the period commencing at 9:30 a.m., Eastern time, on the fifth (5th) Business Day immediately prior to the filing
of any post-effective amendment to the Registration Statement (as defined herein) or New Registration Statement (as such term is
defined in the Registration Rights Agreement), and ending at 9:30 a.m., Eastern time, on the Business Day immediately following,
the effective date of any post-effective amendment to the Registration Statement (as defined herein) or New Registration Statement
(as such term is defined in the Registration Rights Agreement).


 



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(ff)         “Person”
means an individual or entity including but not limited to any limited liability company, a partnership, a joint venture, a corporation,
a trust, an unincorporated organization and a government or any department or agency thereof.


 


(gg)       “Principal Market”
means the OTCQB operated by the OTC Markets Group, Inc. (or any nationally recognized successor thereto); provided, however, that
in the event the Company’s Common Stock is ever listed or traded on The Nasdaq Capital Market, The Nasdaq Global Market,
The Nasdaq Global Select Market, the New York Stock Exchange, the NYSE American, the NYSE Arca, the OTC Bulletin Board, or the
OTCQX operated by the OTC Markets Group, Inc. (or any nationally recognized successor to any of the foregoing), then the “Principal
Market” shall mean such other market or exchange on which the Company’s Common Stock is then listed or traded.


 


(hh)       “Purchase Amount”
means, with respect to any Regular Purchase, any Accelerated Purchase or any Additional Accelerated Purchase made hereunder, as
applicable, the portion of the Available Amount to be purchased by the Investor pursuant to Section 2 hereof.


 


(ii)          “Purchase
Date” means, with respect to a Regular Purchase made pursuant to Section 2(a) hereof, the Business Day on which
the Investor receives, after 4:00 p.m., Eastern time, but prior to 5:00 p.m., Eastern time, on such Business Day, a valid Regular
Purchase Notice for such Regular Purchase in accordance with this Agreement.


 


(jj)          “Purchase Price”
means, with respect to a Regular Purchase made pursuant to Section 2(a) hereof, the lower of: (i) the lowest Sale Price
on the Purchase Date for such Regular Purchase and (ii) the arithmetic average of the three (3) lowest Closing Sale Prices for
the Common Stock during the twelve (12) consecutive Business Days ending on the Business Day immediately preceding such Purchase
Date for such Regular Purchase (in each case, to be appropriately adjusted for any reorganization, recapitalization, non-cash dividend,
stock split or other similar transaction that occurs on or after the date of this Agreement).


 


(kk)        “Regular Purchase
Notice” means, with respect to a Regular Purchase pursuant to Section 2(a) hereof, an irrevocable written notice
from the Company to the Investor directing the Investor to buy a specified number of Purchase Shares (subject to the Purchase Share
limitations contained in Section 2(a) hereof) at the applicable Purchase Price for such Regular Purchase in accordance with
this Agreement.


 


(ll)          “Sale Price”
means any trade price for the shares of Common Stock on the Principal Market as reported by the Principal Market.


 


(mm)      “SEC”
means the U.S. Securities and Exchange Commission.


 


(nn)       “Securities”
means, collectively, the Purchase Shares and the Commitment Shares.


 


(oo)       “Securities
Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.


 


(pp)       “Subsidiary”
means any Person the Company wholly-owns or controls, or in which the Company, directly or indirectly, owns a majority of the voting
stock or similar voting interest, in each case that would be disclosable pursuant to Item 601(b)(21) of Regulation S-K promulgated
under the Securities Act.


 



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(qq)       “Transaction Documents”
means, collectively, this Agreement and the schedules and exhibits hereto, the Registration Rights Agreement and the schedules
and exhibits thereto, and each of the other agreements, documents, certificates and instruments entered into or furnished by the
parties hereto in connection with the transactions contemplated hereby and thereby.


 


(rr)         “Transfer Agent” means Computershare,
Inc., or such other Person who is then serving as the transfer agent for the Company in respect of the Common Stock.


 


(ss)        “VWAP”
means in respect of an Accelerated Purchase Date and an Additional Accelerated Purchase Date, as applicable, the volume weighted
average price of the Common Stock on the Principal Market, as reported on the Principal Market.


 


		2.	PURCHASE OF COMMON STOCK.



 


Subject to the terms and conditions
set forth in this Agreement, the Company has the right to sell to the Investor, and the Investor has the obligation to purchase
from the Company, Purchase Shares as follows:


 


(a)          Commencement
of Regular Sales of Common Stock. Upon the satisfaction of all of the conditions set forth in Sections 7 and 8
hereof (the “Commencement” and the date of satisfaction of such conditions the “Commencement Date”)
and thereafter, the Company shall have the right, but not the obligation, to direct the Investor, by its delivery to the Investor
of a Regular Purchase Notice from time to time, to purchase up to One Hundred Thousand (100,000) Purchase Shares, subject to adjustment
as set forth below in this Section 2(a) (such maximum number of Purchase Shares, as may be adjusted from time to time, the
“Regular Purchase Share Limit”), at the Purchase Price on the Purchase Date (each such purchase a “Regular
Purchase”); provided, however, that the Regular Purchase Share Limit shall be increased to: (i) One Hundred
Fifty Thousand (150,000) Purchase Shares, if the Closing Sale Price of the Common Stock on the applicable Purchase Date is not
below $1.00, (ii) Two Hundred Thousand (200,000) Purchase Shares, if the Closing Sale Price of the Common Stock on the applicable
Purchase Date is not below $1.50, and (iii) Two Hundred Fifty Thousand (250,000) Purchase Shares, if the Closing Sale Price of
the Common Stock on the applicable Purchase Date is not below $2.00 (all of which share and dollar amounts shall be appropriately
proportionately adjusted for any reorganization, recapitalization, non-cash dividend, stock split or other similar transaction;
provided that if, after giving effect to the full proportionate adjustment to the Regular Purchase Share Limit therefor,
the Fully Adjusted Regular Purchase Share Limit then in effect would preclude the Company from delivering to the Investor a Regular
Purchase Notice hereunder for a Purchase Amount (calculated by multiplying (X) the number of Purchase Shares equal to the Fully
Adjusted Regular Purchase Share Limit, by (Y) the Purchase Price per Purchase Share covered by such Regular Purchase Notice on
the applicable Purchase Date therefor) equal to or greater than Seventy-Five Thousand Dollars ($75,000), the Regular Purchase Share
Limit for such Regular Purchase Notice shall not be fully adjusted to equal the applicable Fully Adjusted Regular Purchase Share
Limit, but rather the Regular Purchase Share Limit for such Regular Purchase Notice shall be adjusted to equal the applicable Alternate
Adjusted Regular Purchase Share Limit as of the applicable Purchase Date for such Regular Purchase Notice); and provided,
further, however, that the Investor’s committed obligation under any single Regular Purchase, other than any
Regular Purchase with respect to which an Alternate Adjusted Regular Purchase Share Limit shall apply, shall not exceed Seven Hundred
Fifty Thousand Dollars ($750,000). If the Company delivers any Regular Purchase Notice for a Purchase Amount in excess of the limitations
contained in the immediately preceding sentence, such Regular Purchase Notice shall be void ab initio to the extent of the
amount by which the number of Purchase Shares set forth in such Regular Purchase Notice exceeds the number of Purchase Shares which
the Company is permitted to include in such Purchase Notice in accordance herewith, and the Investor shall have no obligation to
purchase such excess Purchase Shares in respect of such Regular Purchase Notice; provided, however, that the Investor
shall remain obligated to purchase the number of Purchase Shares which the Company is permitted to include in such Regular Purchase
Notice. The Company may deliver a Regular Purchase Notice to the Investor as often as every Business Day, so long as the Company
has not failed to deliver Purchase Shares for the most recent prior Regular Purchase. Notwithstanding the foregoing, the Company
shall not deliver a Regular Purchase Notice to the Investor on any Purchase Date that the Closing Sale Price of the Common Stock
is less than the Floor Price.


 



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(b)          Accelerated
Purchases. Subject to the terms and conditions of this Agreement, from and after the Commencement Date, in addition to purchases
of Purchase Shares as described in Section 2(a) above, the Company shall also have the right, but not the obligation, to
direct the Investor, by its delivery to the Investor of an Accelerated Purchase Notice from time to time in accordance with this
Agreement, to purchase the applicable Accelerated Purchase Share Amount at the Accelerated Purchase Price on the Accelerated Purchase
Date therefor in accordance with this Agreement (each such purchase, an “Accelerated Purchase”). The Company
may deliver an Accelerated Purchase Notice to the Investor only on a Purchase Date on which (i) the Company also properly submitted
a Regular Purchase Notice providing for a Regular Purchase of a number of Purchase Shares not less than the Regular Purchase Share
Limit then in effect on such Purchase Date in accordance with this Agreement (including, without limitation, giving effect to any
automatic increase to the Regular Purchase Share Limit as a result of the Closing Sale Price of the Common Stock exceeding certain
thresholds set forth in Section 2(a) above on such Purchase Date and any other adjustments to the Regular Purchase Share
Limit, in each case pursuant to Section 2(a) above) and (ii) the Closing Sale Price of the Common Stock is not less than
the Accelerated Purchase Floor Price. Within one (1) Business Day after completion of each Accelerated Purchase Date for an Accelerated
Purchase, the Investor will provide to the Company a written confirmation of such Accelerated Purchase setting forth the applicable
Accelerated Purchase Share Amount and Accelerated Purchase Price for such Accelerated Purchase (each, an “Accelerated
Purchase Confirmation”).


 


(c)          Additional
Accelerated Purchases. Subject to the terms and conditions of this Agreement, from and after the Commencement Date, in addition
to purchases of Purchase Shares as described in Section 2(a) and Section 2(b) above, the Company shall also have
the right, but not the obligation, to direct the Investor, by its timely delivery to the Investor of an Additional Accelerated
Purchase Notice on an Additional Accelerated Purchase Date in accordance with this Agreement, to purchase the applicable Additional
Accelerated Purchase Share Amount at the applicable Additional Accelerated Purchase Price therefor in accordance with this Agreement
(each such purchase, an “Additional Accelerated Purchase”). The Company may deliver multiple Additional Accelerated
Purchase Notices to the Investor on an Additional Accelerated Purchase Date; provided, however, that the Company
may deliver an Additional Accelerated Purchase Notice to the Investor only (i) on a Business Day that is also the Accelerated Purchase
Date for an Accelerated Purchase with respect to which the Company properly submitted to the Investor an Accelerated Purchase Notice
in accordance with this Agreement on the applicable Purchase Date for a Regular Purchase of a number of Purchase Shares not less
than the Regular Purchase Share Limit then in effect in accordance with this Agreement (including, without limitation, giving effect
to any automatic increase to the Regular Purchase Share Limit as a result of the Closing Sale Price of the Common Stock exceeding
certain thresholds set forth in Section 2(a) above on such Purchase Date and any other adjustments to the Regular Purchase
Share Limit, in each case pursuant to Section 2(a) above), (ii) if the Closing Sale Price of the Common Stock on the Business
Day immediately preceding the Business Day on which such Additional Accelerated Purchase Notice is delivered is not less than the
Additional Accelerated Purchase Floor Price, and (iii) if all Purchase Shares subject to all prior Regular Purchases, Accelerated
Purchases and Additional Accelerated Purchases, including, without limitation, those that have been effected on the same Business
Day as the applicable Additional Accelerated Purchase Date with respect to which the applicable Additional Accelerated Purchase
relates, have theretofore been received by the Investor as DWAC Shares in accordance with this Agreement. Within one (1) Business
Day after completion of each Additional Accelerated Purchase Date, the Investor will provide to the Company a written confirmation
of each Additional Accelerated Purchase on such Additional Accelerated Purchase Date setting forth the applicable Additional Accelerated
Purchase Share Amount and Additional Accelerated Purchase Price for each such Additional Accelerated Purchase on such Additional
Accelerated Purchase Date (each, an “Additional Accelerated Purchase Confirmation”).


 



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(d)          Payment
for Purchase Shares. For each Regular Purchase, the Investor shall pay to the Company an amount equal to the Purchase Amount
with respect to such Regular Purchase as full payment for such Purchase Shares via wire transfer of immediately available funds
on the same Business Day that the Investor receives such Purchase Shares, if such Purchase Shares are received by the Investor
before 1:00 p.m., Eastern time, or, if such Purchase Shares are received by the Investor after 1:00 p.m., Eastern time, the next
Business Day. For each Accelerated Purchase and each Additional Accelerated Purchase, the Investor shall pay to the Company an
amount equal to the Purchase Amount with respect to such Accelerated Purchase and Additional Accelerated Purchase, respectively,
as full payment for such Purchase Shares via wire transfer of immediately available funds on the second Business Day following
the date that the Investor receives such Purchase Shares. If the Company or the Transfer Agent shall fail for any reason or for
no reason to electronically transfer any Purchase Shares as DWAC Shares with respect to any Regular Purchase, Accelerated Purchase
or Additional Accelerated Purchase (as applicable) within two (2) Business Days following the receipt by the Company of the Purchase
Price, Accelerated Purchase Price or Additional Accelerated Purchase Price, respectively, therefor in compliance with this Section
2(d), and if on or after such Business Day the Investor purchases (in an open market transaction or otherwise) shares of Common
Stock to deliver in satisfaction of a sale by the Investor of such Purchase Shares that the Investor anticipated receiving from
the Company in respect of such Regular Purchase, Accelerated Purchase or Additional Accelerated Purchase (as applicable), then
the Company shall, within two (2) Business Days after the Investor’s request, either (i) pay cash to the Investor in an amount
equal to the Investor’s total purchase price (including customary brokerage commissions, if any) for the shares of Common
Stock so purchased (the “Cover Price”), at which point the Company’s obligation to deliver such Purchase
Shares as DWAC Shares shall terminate, or (ii) promptly honor its obligation to deliver to the Investor such Purchase Shares as
DWAC Shares and pay cash to the Investor in an amount equal to the excess (if any) of the Cover Price over the total Purchase Amount
paid by the Investor pursuant to this Agreement for all of the Purchase Shares to be purchased by the Investor in connection with
such purchases. The Company shall not issue any fraction of a share of Common Stock upon any Regular Purchase, Accelerated Purchase
or Additional Accelerated Purchase. If the issuance would result in the issuance of a fraction of a share of Common Stock, the
Company shall round such fraction of a share of Common Stock up or down to the nearest whole share. All payments made under this
Agreement shall be made in lawful money of the United States of America or wire transfer of immediately available funds to such
account as the Company may from time to time designate by written notice in accordance with the provisions of this Agreement. Whenever
any amount expressed to be due by the terms of this Agreement is due on any day that is not a Business Day, the same shall instead
be due on the next succeeding day that is a Business Day.


 


(e)          Beneficial
Ownership Limitation. Notwithstanding anything to the contrary contained in this Agreement, the Company shall not issue
or sell, and the Investor shall not purchase or acquire, any shares of Common Stock under this Agreement which, when
aggregated with all other shares of Common Stock then beneficially owned by the Investor and its affiliates (as calculated pursuant
to Section 13(d) of the Exchange Act and Rule 13d-3 promulgated thereunder), would result in the beneficial ownership by the Investor of
more than 4.99% of the then issued and outstanding shares of Common Stock (the “Beneficial Ownership Limitation”).
Upon the written or oral request of the Investor, the Company shall promptly (but not later than 24 hours) confirm orally or in
writing to the Investor the number of shares of Common Stock then outstanding. The Investor and the Company shall each cooperate
in good faith in the determinations required hereby and the application hereof. The Investor’s written certification to the
Company of the applicability of the Beneficial Ownership Limitation, and the resulting effect thereof hereunder at any time, shall
be conclusive with respect to the applicability thereof and such result absent manifest error.


 



    	 	-9-	 



    	 



    

 


(f)           General.
The Company shall not deliver any Regular Purchase Notices, Accelerated Purchase Notices, or Additional Accelerated Purchase Notices
to the Investor during the PEA Period. If the Company delivers any Accelerated Purchase Notice or Additional Accelerated Purchase
Notice directing the Investor to purchase an amount of Purchase Shares that exceeds the Accelerated Purchase Share Amount, or Additional
Accelerated Purchase Share Amount, as the case may be, that the Company is then permitted to include in such notice, such Accelerated
Purchase Notice or Additional Accelerated Notice, as the case may be, shall be void ab initio to the extent of the amount
by which the number of Purchase Shares set forth in such notice exceeds the Accelerated Purchase Share Amount or Additional Accelerated
Share Amount that the Company is then permitted to include in such notice (which shall be confirmed in an Accelerated Purchase
Confirmation or Additional Accelerated Purchase Share Confirmation, as the case may be), and the Investor shall have no obligation
to purchase such excess Purchase Shares in respect of such Accelerated Purchase Notice or Additional Accelerated Purchase Notice;
provided, however, that the Investor shall remain obligated to purchase the Accelerated Purchase Share Amount or
Additional Accelerated Purchase Share Amount which the Company is permitted to include in such notice.


 


		3.	INVESTOR'S REPRESENTATIONS AND WARRANTIES.



 


The Investor represents and warrants
to the Company that as of the date hereof and as of the Commencement Date:


 


(a)          Investment
Purpose.  The Investor is acquiring the Securities as principal for its own account and not with a view to or for distributing
or reselling such Securities or any part thereof in violation of the Securities Act or any applicable state securities law, has
no present intention of distributing any of such Securities in violation of the Securities Act or any applicable state securities
law and has no direct or indirect arrangement or understandings with any other Persons to distribute or regarding the distribution
of such Securities in violation of the Securities Act or any applicable state securities law (this representation and warranty
not limiting the Investor’s right to sell the Securities at any time pursuant to the Registration Statement described herein
or otherwise in compliance with applicable federal and state securities laws).  The Investor is acquiring the Securities
hereunder in the ordinary course of its business.


 


(b)          Accredited
Investor Status. The Investor is an "accredited investor" as that term is defined in Rule 501(a)(3) of Regulation
D promulgated under the Securities Act.


 


(c)          Reliance
on Exemptions. The Investor understands that the Securities are being offered and sold to it in reliance on specific exemptions
from the registration requirements of United States federal and state securities laws and that the Company is relying in part upon
the truth and accuracy of, and the Investor's compliance with, the representations, warranties, agreements, acknowledgments and
understandings of the Investor set forth herein in order to determine the availability of such exemptions and the eligibility of
the Investor to acquire the Securities.


 



    	 	-10-	 



    	 



    

 


(d)          Information.
The Investor understands that its investment in the Securities involves a high degree of risk. The Investor (i) is able to bear
the economic risk of an investment in the Securities including a total loss thereof, (ii) has such knowledge and experience in
financial and business matters that it is capable of evaluating the merits and risks of the proposed investment in the Securities
and (iii) has had an opportunity to ask questions of and receive answers from the officers of the Company concerning the financial
condition and business of the Company and others matters related to an investment in the Securities. Neither such inquiries nor
any other due diligence investigations conducted by the Investor or its representatives shall modify, amend or affect the Investor's
right to rely on the Company's representations and warranties contained in Section 4 below. The Investor has sought such accounting,
legal and tax advice as it has considered necessary to make an informed investment decision with respect to its acquisition of
the Securities. The Investor understands that it (and not the Company) shall be responsible for its own tax liabilities that may
arise as a result of this investment or the transactions contemplated by this Agreement.


 


(e)          No
Governmental Review. The Investor understands that no U.S. federal or state agency or any other government or governmental
agency has passed on or made any recommendation or endorsement of the Securities or the fairness or suitability of an investment
in the Securities nor have such authorities passed upon or endorsed the merits of the offering of the Securities.


 


(f)           Transfer
or Sale. The Investor understands that (i) the Securities may not be offered for sale, sold, assigned or transferred unless
(A) registered pursuant to the Securities Act or (B) an exemption exists permitting such Securities to be sold, assigned or transferred
without such registration; (ii) any sale of the Securities made in reliance on Rule 144 may be made only in accordance with the
terms of Rule 144 and further, if Rule 144 is not applicable, any resale of the Securities under circumstances in which the seller
(or the Person through whom the sale is made) may be deemed to be an underwriter (as that term is defined in the Securities Act)
may require compliance with some other exemption under the Securities Act or the rules and regulations of the SEC thereunder.


 


(g)          Validity;
Enforcement. This Agreement has been duly and validly authorized, executed and delivered on behalf of the Investor and is a
valid and binding agreement of the Investor enforceable against the Investor in accordance with its terms, subject as to enforceability
to general principles of equity and to applicable bankruptcy, insolvency, reorganization, moratorium, liquidation and other similar
laws relating to, or affecting generally, the enforcement of applicable creditors' rights and remedies.


 


(h)          Organization
and Standing. The Investor is a limited liability company duly organized and validly existing and in good standing under the
laws of, and maintains its principal place of business within, the State of Illinois.


 


(i)           No
Short Selling. The Investor represents and warrants to the Company that at no time prior to the date of this Agreement has
any of the Investor, its agents, representatives or affiliates engaged in or effected, in any manner whatsoever, directly or indirectly,
any (i) "short sale" (as such term is defined in Rule 200 of Regulation SHO of the Exchange Act) of the Common Stock
or (ii) hedging transaction, which establishes a net short position with respect to the Common Stock.


 


		4.	REPRESENTATIONS AND WARRANTIES OF THE COMPANY.



 


The Company represents and warrants
to the Investor that, except as set forth in the disclosure schedules attached hereto, which exceptions shall be deemed to be a
part of the representations and warranties made hereunder, as of the date hereof and as of the Commencement Date:


 



    	 	-11-	 



    	 



    

 


(a)          Organization
and Qualification. The Company and each of its Subsidiaries is an entity duly incorporated or otherwise organized, validly
existing and in good standing under the laws of the jurisdiction of its incorporation or organization, with the requisite corporate
power and authority to own and use its properties and assets and to carry on its business as currently conducted.  Neither
the Company nor any of its Subsidiaries is in violation or default of any of the provisions of its respective certificate or articles
of incorporation, bylaws or other organizational or charter documents.  Each of the Company and its Subsidiaries is duly
qualified to conduct business and is in good standing as a foreign corporation or other entity in each jurisdiction in which the
nature of the business conducted or property owned by it makes such qualification necessary, except where the failure to be so
qualified or in good standing, as the case may be, could not have or reasonably be expected to result in a Material Adverse Effect
and no proceeding has been instituted in any such jurisdiction revoking, limiting or curtailing or seeking to revoke, limit or
curtail such power and authority or qualification. The Company has no Subsidiaries except as set forth on Exhibit 21.1 to the Company’s
Annual Report on Form 10-K for the year ended December 31, 2018.


 


(b)          Authorization;
Enforcement; Validity. (i) The Company has the requisite corporate power and authority to enter into and perform its obligations
under this Agreement, the Registration Rights Agreement and each of the other Transaction Documents, and to issue the Securities
in accordance with the terms hereof and thereof, (ii) the execution and delivery of the Transaction Documents by the Company and
the consummation by it of the transactions contemplated hereby and thereby, including without limitation, the issuance of the Commitment
Shares (as defined below in Section 5(e)) and the reservation for issuance and the issuance of the Purchase Shares issuable
under this Agreement, have been duly authorized by the Company's Board of Directors (such authorization, the “Signing
Resolutions”), (iii) each of this Agreement and the Registration Rights Agreement has been, and each other Transaction
Document shall be on the Commencement Date, duly executed and delivered by the Company and (iv) each of this Agreement and the
Registration Rights Agreement constitutes, and each other Transaction Document upon its execution on behalf of the Company, shall
constitute, the valid and binding obligations of the Company enforceable against the Company in accordance with their terms, except
as such enforceability may be limited by general principles of equity or applicable bankruptcy, insolvency, reorganization, moratorium,
liquidation or similar laws relating to, or affecting generally, the enforcement of creditors' rights and remedies. The Signing
Resolutions are valid, in full force and effect and have not been modified or supplemented in any respect. The Company has delivered
to the Investor a true and correct copy of the unanimous written consent adopting the Signing Resolutions executed by all of the
members of the Board of Directors of the Company. Except as set forth in this Agreement, no other approvals or consents of the
Company’s Board of Directors, any authorized committee thereof, and/or stockholders (except as provided in this Agreement)
is necessary under applicable laws and the Company’s Certificate of Incorporation and/or Bylaws to authorize the execution
and delivery of this Agreement or any of the transactions contemplated hereby, including, but not limited to, the issuance of the
Commitment Shares and the issuance of the Purchase Shares.


 


(c)          Capitalization.
The authorized capital stock of the Company is set forth in the Company’s Quarterly Report on Form 10-Q for the quarter ended
September 30, 2019. Except as disclosed in the SEC Documents (as defined below), as of the date hereof, (i) no shares of the Company's
capital stock are subject to preemptive rights or any other similar rights or any liens or encumbrances suffered or permitted by
the Company, (ii) there are no outstanding debt securities, (iii) there are no outstanding options, warrants, scrip, rights to
subscribe to, calls or commitments of any character whatsoever relating to, or securities or rights convertible into, any shares
of capital stock of the Company or any of its Subsidiaries, or contracts, commitments, understandings or arrangements by which
the Company or any of its Subsidiaries is or may become bound to issue additional shares of capital stock of the Company or any
of its Subsidiaries or options, warrants, scrip, rights to subscribe to, calls or commitments of any character whatsoever relating
to, or securities or rights convertible into, any shares of capital stock of the Company or any of its Subsidiaries, (iv) there
are no agreements or arrangements under which the Company or any of its Subsidiaries is obligated to register the sale of any of
their securities under the Securities Act (except the Registration Rights Agreement), (v) there are no outstanding securities or
instruments of the Company or any of its Subsidiaries which contain any redemption or similar provisions, and there are no contracts,
commitments, understandings or arrangements by which the Company or any of its Subsidiaries is or may become bound to redeem a
security of the Company or any of its Subsidiaries, (vi) there are no securities or instruments containing anti-dilution or similar
provisions that will be triggered by the issuance of the Securities as described in this Agreement and (vii) the Company does not
have any stock appreciation rights or "phantom stock" plans or agreements or any similar plan or agreement. The Company
has furnished to the Investor true and correct copies of the Company's Certificate of Incorporation, as amended and as in effect
on the date hereof (the "Certificate of Incorporation"), and the Company's Bylaws, as amended and as in effect
on the date hereof (the "Bylaws"), and summaries of the material terms of all securities convertible into or exercisable
for Common Stock, if any, and copies of any documents containing the material rights of the holders thereof in respect thereto
that, in either case, are not disclosed in the SEC Documents.


 



    	 	-12-	 



    	 



    

 


(d)          Issuance
of Securities. Upon issuance and payment therefor in accordance with the terms and conditions of this Agreement, the Purchase
Shares shall be validly issued, fully paid and nonassessable and free from all taxes, liens, charges, restrictions, rights of first
refusal and preemptive rights with respect to the issue thereof, with the holders being entitled to all rights accorded to a holder
of Common Stock. Upon issuance in accordance with the terms and conditions of this Agreement, the Commitment Shares (as defined
below in Section 5(e)) shall be validly issued, fully paid and nonassessable and free from all taxes, liens, charges, restrictions,
rights of first refusal and preemptive rights with respect to the issue thereof, with the holders being entitled to all rights
accorded to a holder of Common Stock. 15,000,000 shares of Common Stock have been duly authorized and reserved for issuance upon
purchase under this Agreement as Purchase Shares.


 


(e)          No
Conflicts. The execution, delivery and performance of the Transaction Documents by the Company and the consummation by the
Company of the transactions contemplated hereby and thereby (including, without limitation, the reservation for issuance and issuance
of the Purchase Shares and the Commitment Shares) will not (i) result in a violation of the Certificate of Incorporation, any Certificate
of Designations, Preferences and Rights of any outstanding series of preferred stock of the Company or the Bylaws or (ii) conflict
with, or constitute a default (or an event which with notice or lapse of time or both would become a default) under, or give to
others any rights of termination, amendment, acceleration or cancellation of, any agreement, indenture or instrument to which the
Company or any of its Subsidiaries is a party, or result in a violation of any law, rule, regulation, order, judgment or decree
(including federal and state securities laws and regulations and the rules and regulations of the Principal Market applicable to
the Company or any of its Subsidiaries) or by which any property or asset of the Company or any of its Subsidiaries is bound or
affected, except in the case of conflicts, defaults, terminations, amendments, accelerations, cancellations and violations under
clause (ii), which could not reasonably be expected to result in a Material Adverse Effect. Neither the Company nor its Subsidiaries
is in violation of any term of or in default under its Certificate of Incorporation, any Certificate of Designation, Preferences
and Rights of any outstanding series of preferred stock of the Company or Bylaws or their organizational charter or bylaws, respectively.
Neither the Company nor any of its Subsidiaries is in violation of any term of or is in default under any material contract, agreement,
mortgage, indebtedness, indenture, instrument, judgment, decree or order or any statute, rule or regulation applicable to the Company
or its Subsidiaries, except for possible conflicts, defaults, terminations or amendments that could not reasonably be expected
to have a Material Adverse Effect. The business of the Company and its Subsidiaries is not being conducted, and shall not be conducted,
in violation of any law, ordinance or regulation of any governmental entity, except for possible violations, the sanctions for
which either individually or in the aggregate could not reasonably be expected to have a Material Adverse Effect. Except as specifically
contemplated by this Agreement and as required under the Securities Act or applicable state securities laws and the rules and regulations
of the Principal Market, the Company is not required to obtain any consent, authorization or order of, or make any filing or registration
with, any court or governmental agency or any regulatory or self-regulatory agency in order for it to execute, deliver or perform
any of its obligations under or contemplated by the Transaction Documents in accordance with the terms hereof or thereof. Except
as set forth elsewhere in this Agreement, all consents, authorizations, orders, filings and registrations which the Company is
required to obtain pursuant to the preceding sentence shall be obtained or effected on or prior to the Commencement Date. Except
as disclosed in the SEC Documents, since one year prior to the date hereof, the Company has not received nor delivered any notices
or correspondence from or to the Principal Market, other than notices with respect to listing of additional shares of Common Stock
and other routine correspondence. Except as disclosed in the SEC Documents, the Principal Market has not commenced any delisting
proceedings against the Company.


 



    	 	-13-	 



    	 



    

 


(f)           SEC
Documents; Financial Statements. The Company has filed all reports, schedules, forms, statements and other documents required
to be filed by the Company under the Securities Act and the Exchange Act, including pursuant to Section 13(a) or 15(d) thereof,
for the twelve months preceding the date hereof (or such shorter period as the Company was required by law or regulation to file
such material) (the foregoing materials, including the exhibits thereto and documents incorporated by reference therein, being
collectively referred to herein as the “SEC Documents”) on a timely basis or has received a valid extension
of such time of filing and has filed any such SEC Documents prior to the expiration of any such extension.  As of their
respective dates, the SEC Documents complied in all material respects with the requirements of the Securities Act and the Exchange
Act, as applicable. None of the SEC Documents, when filed, contained any untrue statement of a material fact or omitted to state
a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances
under which they were made, not misleading. The financial statements of the Company included in the SEC Documents complied in all
material respects with applicable accounting requirements and the rules and regulations of the SEC with respect thereto as in effect
at the time of filing.  Such financial statements were prepared in accordance with United States generally accepted accounting
principles applied on a consistent basis during the periods involved (“GAAP”), except as may have been otherwise
specified in such financial statements or the notes thereto and except that unaudited financial statements may not have contained
all footnotes required by GAAP, and fairly presented in all material respects the financial position of the Company and its consolidated
Subsidiaries as of and for the dates thereof and the results of operations and cash flows for the periods then ended, subject,
in the case of unaudited statements, to normal, immaterial, year-end audit adjustments. Except as set forth in the SEC Documents,
the Company has received no notices or correspondence from the SEC for the one year preceding the date hereof. The SEC has
not commenced any enforcement proceedings against the Company or any of its Subsidiaries.


 


(g)          Absence
of Certain Changes. Except as disclosed in the SEC Documents, since December 31, 2018, there has been no material adverse change
in the business, properties, operations, financial condition or results of operations of the Company or its Subsidiaries. The Company
has not taken any steps, and does not currently expect to take any steps, to seek protection pursuant to any Bankruptcy Law nor
does the Company or any of its Subsidiaries have any knowledge or reason to believe that its creditors intend to initiate involuntary
bankruptcy or insolvency proceedings.


 


(h)          Absence
of Litigation. Except as disclosed in the SEC Documents, there is no action, suit, proceeding, inquiry or investigation before
or by any court, public board, government agency, self-regulatory organization or body pending or, to the knowledge of the Company
or any of its Subsidiaries, threatened against or affecting the Company, the Common Stock or any of the Company's or its Subsidiaries'
officers or directors in their capacities as such, which could reasonably be expected to have a Material Adverse Effect.


 


(i)           Acknowledgment
Regarding Investor's Status. The Company acknowledges and agrees that the Investor is acting solely in the capacity of arm's
length purchaser with respect to the Transaction Documents and the transactions contemplated hereby and thereby. The Company further
acknowledges that the Investor is not acting as a financial advisor or fiduciary of the Company (or in any similar capacity) with
respect to the Transaction Documents and the transactions contemplated hereby and thereby and any advice given by the Investor
or any of its representatives or agents in connection with the Transaction Documents and the transactions contemplated hereby and
thereby is merely incidental to the Investor's purchase of the Securities. The Company further represents to the Investor that
the Company's decision to enter into the Transaction Documents has been based solely on the independent evaluation by the Company
and its representatives and advisors.


 



    	 	-14-	 



    	 



    

 


(j)           No
General Solicitation; No Integrated Offering. Neither the Company, nor any of its affiliates, nor any Person acting on its
or their behalf, has engaged in any form of general solicitation or general advertising (within the meaning of Regulation D under
the Securities Act) in connection with the offer or sale of the Securities. Neither the Company, nor or any of its affiliates,
nor any Person acting on their behalf has, directly or indirectly, made any offers or sales of any security or solicited any offers
to buy any security, under circumstances that would require registration of the offer and sale of any of the Securities under the
Securities Act, whether through integration with prior offerings or otherwise, or cause this offering of the Securities to be integrated
with prior offerings by the Company in a manner that would require stockholder approval pursuant to the rules of the Principal
Market. The issuance and sale of the Securities hereunder does not contravene the rules and regulations of the Principal Market.


 


(k)          Intellectual
Property Rights. The Company and its Subsidiaries own or possess adequate rights or licenses to use all material trademarks,
trade names, service marks, service mark registrations, service names, patents, patent rights, copyrights, inventions, licenses,
approvals, governmental authorizations, trade secrets and rights necessary to conduct their respective businesses as now conducted.
None of the Company's material trademarks, trade names, service marks, service mark registrations, service names, patents, patent
rights, copyrights, inventions, licenses, approvals, government authorizations, trade secrets or other intellectual property rights
have expired or terminated, or, by the terms and conditions thereof, could expire or terminate within two years from the date of
this Agreement. The Company and its Subsidiaries do not have any knowledge of any infringement by the Company or its Subsidiaries
of any material trademark, trade name rights, patents, patent rights, copyrights, inventions, licenses, service names, service
marks, service mark registrations, trade secret or other similar rights of others, or of any such development of similar or identical
trade secrets or technical information by others, and there is no claim, action or proceeding being made or brought against, or
to the Company's knowledge, being threatened against, the Company or its Subsidiaries regarding trademark, trade name, patents,
patent rights, invention, copyright, license, service names, service marks, service mark registrations, trade secret or other infringement,
which could reasonably be expected to have a Material Adverse Effect.


 


(l)           Environmental
Laws. The Company and its Subsidiaries (i) are in compliance with any and all applicable foreign, federal, state and local
laws and regulations relating to the protection of human health and safety, the environment or hazardous or toxic substances or
wastes, pollutants or contaminants (“Environmental Laws”), (ii) have received all permits, licenses or other
approvals required of them under applicable Environmental Laws to conduct their respective businesses and (iii) are in compliance
with all terms and conditions of any such permit, license or approval, except where, in each of the three foregoing clauses, the
failure to so comply could not reasonably be expected to have, individually or in the aggregate, a Material Adverse Effect.


 


(m)         Title.
Except as set forth in the SEC Documents, the Company and its Subsidiaries have good and marketable title in fee simple to all
real property owned by them and good and marketable title in all personal property owned by them that is material to the business
of the Company and its Subsidiaries, in each case free and clear of all liens, encumbrances and defects (“Liens”)
and, except for Liens as do not materially affect the value of such property and do not materially interfere with the use made
and proposed to be made of such property by the Company and its Subsidiaries and Liens for the payment of federal, state or other
taxes, the payment of which is neither delinquent nor subject to penalties.  Any real property and facilities held under
lease by the Company and its Subsidiaries are held by them under valid, subsisting and enforceable leases with which the Company
and its Subsidiaries are in compliance with such exceptions as are not material and do not interfere with the use made and proposed
to be made of such property and buildings by the Company and its Subsidiaries.


 



    	 	-15-	 



    	 



    

 


(n)          Insurance.
The Company and each of its Subsidiaries are insured by insurers of recognized financial responsibility against such losses and
risks and in such amounts as management of the Company believes to be prudent and customary in the businesses in which the Company
and its Subsidiaries are engaged. Neither the Company nor any such Subsidiary has been refused any insurance coverage sought or
applied for and neither the Company nor any such Subsidiary has 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 from similar insurers as may be necessary to
continue its business at a cost that would not materially and adversely affect the condition, financial or otherwise, or the earnings,
business or operations of the Company and its Subsidiaries, taken as a whole.


 


(o)          Regulatory
Permits. The Company and its Subsidiaries possess all material certificates, authorizations and permits issued by the appropriate
federal, state or foreign regulatory authorities necessary to conduct their respective businesses, and neither the Company nor
any such Subsidiary has received any notice of proceedings relating to the revocation or modification of any such certificate,
authorization or permit.


 


(p)          Tax
Status. The Company and each of its Subsidiaries has made or filed all federal and state income and all other material tax
returns, reports and declarations required by any jurisdiction to which it is subject (unless and only to the extent that the Company
and each of its Subsidiaries has set aside on its books provisions reasonably adequate for the payment of all unpaid and unreported
taxes) and has paid all taxes and other governmental assessments and charges that are material in amount, shown or determined to
be due on such returns, reports and declarations, except those being contested in good faith and has set aside on its books provision
reasonably adequate for the payment of all taxes for periods subsequent to the periods to which such returns, reports or declarations
apply. There are no unpaid taxes in any material amount claimed to be due by the taxing authority of any jurisdiction, and the
officers of the Company know of no basis for any such claim.


 


(q)          Transactions
With Affiliates.  Except as set forth in the SEC Documents,
none of the officers or directors of the Company and, to the knowledge of the Company, none of the employees of the Company is
presently a party to any transaction with the Company or any Subsidiary (other than for services as employees, officers and directors),
including any contract, agreement or other arrangement providing for the furnishing of services to or by, providing for rental
of real or personal property to or from, or otherwise requiring payments to or from any officer, director or such employee or,
to the knowledge of the Company, any entity in which any officer, director, or any such employee has a substantial interest or
is an officer, director, trustee or partner, in each case in excess of $120,000 other than for (i) payment of salary or consulting
fees for services rendered, (ii) reimbursement for expenses incurred on behalf of the Company and (iii) other employee benefits,
including stock option agreements under any stock option plan of the Company.


 


(r)           Application
of Takeover Protections. The Company and its board of directors have taken or will take prior to the Commencement Date all
necessary action, if any, in order to render inapplicable any control share acquisition, business combination, poison pill (including
any distribution under a rights agreement) or other similar anti-takeover provision under the Certificate of Incorporation or the
laws of the state of its incorporation which is or could become applicable to the Investor as a result of the transactions contemplated
by this Agreement, including, without limitation, the Company's issuance of the Securities and the Investor's ownership of the
Securities.


 



    	 	-16-	 



    	 



    

 


(s)          Disclosure.  Except
with respect to the material terms and conditions of the transactions contemplated by the Transaction Documents that will be timely
publicly disclosed by the Company, the Company confirms that neither it nor any other Person acting on its behalf has provided
the Investor or its agents or counsel with any information that it believes constitutes or might constitute material, non-public
information which is not otherwise disclosed in the Registration Statement or the SEC Documents.  The press releases
disseminated by the Company during the twelve months preceding the date of this Agreement, taken as a whole, are true and correct
in all material respects.   The Company understands and confirms that the Investor will rely on the foregoing representation
in effecting purchases and sales of securities of the Company.   The Company acknowledges and agrees that the Investor
neither makes nor has made any representations or warranties with respect to the transactions contemplated hereby other than those
specifically set forth in Section 3 hereof.


 


(t)           Foreign
Corrupt Practices.  Neither the Company, nor to the
knowledge of the Company, any agent or other Person acting on behalf of the Company, has (i) directly or indirectly, used any funds
for unlawful contributions, gifts, entertainment or other unlawful expenses related to foreign or domestic political activity,
(ii) made any unlawful payment to foreign or domestic government officials or employees or to any foreign or domestic political
parties or campaigns from corporate funds, (iii) failed to disclose fully any contribution made by the Company (or made by any
Person acting on its behalf of which the Company is aware) which is in violation of law, or (iv) violated in any material respect
any provision of the Foreign Corrupt Practices Act of 1977, as amended.


 


(u)          DTC
Eligibility. The Company, through the Transfer Agent, currently participates in the DTC Fast Automated Securities Transfer
(FAST) Program and the Common Stock can be transferred electronically to third parties via the DTC Fast Automated Securities Transfer
(FAST) Program.


 


(v)          Sarbanes-Oxley.
The Company is in compliance in all material respects with all provisions of the Sarbanes-Oxley Act of 2002, as amended, which
are applicable to it as of the date hereof.


 


(w)         Certain
Fees. No brokerage or finder’s fees or commissions are or will be payable by the Company to any broker, financial advisor
or consultant, finder, placement agent, investment banker, bank or other Person with respect to the transactions contemplated by
the Transaction Documents. The Investor shall have no obligation with respect to any fees or with respect to any claims made by
or on behalf of other Persons for fees of a type contemplated in this Section 4(w) that may be due in connection with the
transactions contemplated by the Transaction Documents.


 


(x)          Investment
Company. The Company is not, and immediately after receipt of payment for the Securities will not be, an “investment
company” within the meaning of the Investment Company Act of 1940, as amended.


 


(y)          Listing
and Maintenance Requirements. The Common Stock is registered pursuant to Section 12(g) of the Exchange Act, and the Company
has taken no action designed to, or which to its knowledge is likely to have the effect of, terminating the registration of the
Common Stock pursuant to the Exchange Act nor has the Company received any notification that the SEC is currently contemplating
terminating such registration. Except as disclosed in the SEC Documents, the Company has not, in the twelve (12) months preceding
the date hereof, received any notice from any Person to the effect that the Company is not in compliance with the listing or maintenance
requirements of the Principal Market. Except as disclosed in the SEC Documents, the Company is, and has no reason to believe that
it will not in the foreseeable future continue to be, in compliance with all such listing and maintenance requirements.


 



    	 	-17-	 



    	 



    

 


(z)           Accountants.
The Company’s accountants are set forth in the SEC Documents and, to the knowledge of the Company, such accountants are an
independent registered public accounting firm as required by the Securities Act.


  


(aa)        No Market Manipulation. The
Company has not, and to its knowledge no Person acting on its behalf has, (i) taken, directly or indirectly, any action designed
to cause or to result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale or
resale of any of the Securities, (ii) sold, bid for, purchased, or, paid any compensation for soliciting purchases of, any
of the Securities, or (iii) paid or agreed to pay to any Person any compensation for soliciting another to purchase any other
securities of the Company.


 


(bb)       Shell Company Status.
The Company is not currently, and has never been, an issuer identified in Rule 144(i)(1) under the Securities Act.


 


(cc)        No Disqualification Events.
None of the Company, any of its predecessors, any affiliated issuer, any director, executive officer, other officer of the Company
participating in the offering contemplated hereby, any beneficial owner of 20% or more of the Company's outstanding voting equity
securities, calculated on the basis of voting power, nor any promoter (as that term is defined in Rule 405 under the Securities
Act) connected with the Company in any capacity at the time of sale (each, an “Issuer Covered Person”) is subject
to any of the “Bad Actor” disqualifications described in Rule 506(d)(1)(i) to (viii) under the Securities Act (a “Disqualification
Event”), except for a Disqualification Event covered by Rule 506(d)(2) or (d)(3) under the Securities Act. The Company
has exercised reasonable care to determine whether any Issuer Covered Person is subject to a Disqualification Event.


 


		5.	COVENANTS.



 


(a)          Filing
of Current Report and Registration Statement. The Company agrees that it shall, within the time required under the Exchange
Act, file with the SEC a report on Form 8-K relating to the transactions contemplated by, and describing the material terms and
conditions of, the Transaction Documents (the “Current Report”). The Company shall also file with the SEC, within
thirty (30) Business Days from the date hereof, a new registration statement (the “Registration Statement”)
covering only the resale of the Purchase Shares and all of the Commitment Shares, in accordance with the terms of the Registration
Rights Agreement between the Company and the Investor, dated as of the date hereof (the “Registration Rights Agreement”).
The Company shall permit the Investor to review and comment upon the final pre-filing draft version of the Current Report at least
two (2) Business Days prior to its filing with the SEC, and the Company shall give due consideration to all such comments. The
Investor shall use its reasonable best efforts to comment upon the final pre-filing draft version of the Current Report within
one (1) Business Day from the date the Investor receives it from the Company.


 


(b)          Blue
Sky. The Company shall take all such action, if any, as is reasonably necessary in order to obtain an exemption for or to register
or qualify (i) the issuance of the Commitment Shares and the sale of the Purchase Shares to the Investor under this Agreement and
(ii) any subsequent resale of all Commitment Shares and all Purchase Shares by the Investor, in each case, under applicable securities
or “Blue Sky” laws of the states of the United States in such states as is reasonably requested by the Investor from
time to time, and shall provide evidence of any such action so taken to the Investor.


 



    	 	-18-	 



    	 



    

 


(c)          Listing/DTC.
The Company shall promptly secure the listing of all of the Purchase Shares and Commitment Shares to be issued to the Investor
hereunder on the Principal Market (subject to official notice of issuance) and upon each other national securities exchange or
automated quotation system, if any, upon which the Common Stock is then listed, and shall use commercially reasonable efforts to
maintain, so long as any shares of Common Stock shall be so listed, such listing of all such Securities from time to time issuable
hereunder. The Company shall use commercially reasonable efforts to maintain the listing of the Common Stock on the Principal Market
and shall comply in all respects with the Company’s reporting, filing and other obligations under the bylaws or rules and
regulations of the Principal Market. Neither the Company nor any of its Subsidiaries shall take any action that would reasonably
be expected to result in the delisting or suspension of the Common Stock on the Principal Market. The Company shall promptly, and
in no event later than the following Business Day, provide to the Investor copies of any notices it receives from any Person regarding
the continued eligibility of the Common Stock for listing on the Principal Market; provided, however, that the Company shall not
be required to provide the Investor copies of any such notice that the Company reasonably believes constitutes material non-public
information and the Company would not be required to publicly disclose such notice in any report or statement filed with the SEC
and under the Exchange Act or the Securities Act. The Company shall pay all fees and expenses in connection with satisfying its
obligations under this Section 5(c). The Company shall take all action necessary to ensure that its Common Stock can be
transferred electronically as DWAC Shares.


 


(d)          Prohibition
of Short Sales and Hedging Transactions. The Investor agrees that beginning on the date of this Agreement and ending on the
date of termination of this Agreement as provided in Section 11, the Investor and its agents, representatives and affiliates shall
not in any manner whatsoever enter into or effect, directly or indirectly, any (i) “short sale” (as such term is defined
in Rule 200 of Regulation SHO of the Exchange Act) of the Common Stock or (ii) hedging transaction, which establishes a net short
position with respect to the Common Stock.


 


(e)          Issuance
of Commitment Shares. In consideration for the Investor’s execution and delivery of this Agreement, the Company shall
cause to be issued to the Investor a total of 706,592 shares of Common Stock (the “Commitment Shares”) immediately
upon the execution of this Agreement and shall deliver to the Transfer Agent the Irrevocable Transfer Agent Instructions with respect
to the issuance of such Commitment Shares. For the avoidance of doubt, all of the Commitment Shares shall be fully earned as of
the date of this Agreement, whether or not the Commencement shall occur or any Purchase Shares are purchased by the Investor under
this Agreement and irrespective of any subsequent termination of this Agreement.


 


(f)           Due
Diligence; Non-Public Information. The Investor shall have the right, from time to time as the Investor may reasonably deem
appropriate and upon reasonable advance notice to the Company, to perform reasonable due diligence on the Company during normal
business hours. The Company and its officers and employees shall provide information and reasonably cooperate with the Investor
in connection with any reasonable request by the Investor related to the Investor's due diligence of the Company. Each party hereto
agrees not to disclose any Confidential Information of the other party to any third party and shall not use the Confidential Information
for any purpose other than in connection with, or in furtherance of, the transactions contemplated hereby. Each party hereto acknowledges
that the Confidential Information shall remain the property of the disclosing party and agrees that it shall take all reasonable
measures to protect the secrecy of any Confidential Information disclosed by the other party. The Company confirms that neither
it nor any other Person acting on its behalf shall provide the Investor or its agents or counsel with any information that constitutes
or might constitute material, non-public information, unless a simultaneous public announcement thereof is made by the Company
in the manner contemplated by Regulation FD. In the event of a breach of the foregoing covenant by the Company or any Person acting
on its behalf (as determined in the reasonable good faith judgment of the Investor), in addition to any other remedy provided herein
or in the other Transaction Documents, if the Investor is holding any Securities at the time of the disclosure of material, non-public
information, the Investor shall have the right to make a public disclosure, in the form of a press release, public advertisement
or otherwise, of such material, non-public information without the prior approval by the Company; provided the Investor shall have
first provided notice to the Company that it believes it has received information that constitutes material, non-public information,
the Company shall have at least 24 hours to publicly disclose such material, non-public information prior to any such disclosure
by the Investor, the Company shall have failed to demonstrate to the Investor in writing within such time period that such information
does not constitute material, non-public information, and the Company shall have failed to publicly disclose such material, non-public
information within such time period. The Investor shall not have any liability to the Company, any of its Subsidiaries, or any
of their respective directors, officers, employees, stockholders or agents, for any such disclosure. The Company understands and
confirms that the Investor shall be relying on the foregoing covenants in effecting transactions in securities of the Company.


 



    	 	-19-	 



    	 



    

 


(g)         Purchase
Records. The Investor and the Company shall each maintain records showing the remaining Available Amount at any given time
and the dates and Purchase Amounts for each Regular Purchase, Accelerated Purchase and Additional Accelerated Purchase or shall
use such other method, reasonably satisfactory to the Investor and the Company.


 


(h)
        Taxes. The Company shall pay
any and all transfer, stamp or similar taxes that may be payable with respect to the issuance and delivery of any shares of Common
Stock to the Investor made under this Agreement.


 


(i)           Use
of Proceeds. The Company will use the net proceeds from the offering as described in the Registration Statement or the SEC
Documents.


 


(j)           Other
Transactions. The Company shall not enter into, announce or recommend to its stockholders any agreement, plan, arrangement
or transaction in or of which the terms thereof would restrict, materially delay, conflict with or impair the ability or right
of the Company to perform its obligations under the Transaction Documents, including, without limitation, the obligation of the
Company to deliver the Purchase Shares and the Commitment Shares to the Investor in accordance with the terms of the Transaction
Documents.


 


(k)          Integration.
From and after the date of this Agreement, neither the Company, nor or any of its affiliates will, and the Company shall use its
reasonable best efforts to ensure that no Person acting on their behalf will, directly or indirectly, make any offers or sales
of any security or solicit any offers to buy any security, under circumstances that would (i) require registration of the offer
and sale by the Company to the Investor of any of the Securities under the Securities Act, or (ii) cause this offering of the Securities
by the Company to the Investor to be integrated with other offerings by the Company in a manner that would require stockholder
approval pursuant to the rules of the Principal Market on which any of the securities of the Company are listed or designated,
unless in the case of this clause (ii), stockholder approval is obtained before the closing of such subsequent transaction in accordance
with the rules of such Principal Market.


 



    	 	-20-	 



    	 



    

 


(l)           Limitation
on Variable Rate Transactions. From and after the date of this Agreement until the later of: (i) the 36-month anniversary of
the date of this Agreement and (ii) the 36-month anniversary of the Commencement Date (if the Commencement has occurred), in each
case irrespective of any earlier termination of this Agreement, the Company shall be prohibited from effecting or entering into
an agreement to effect any issuance by the Company of Common Stock or Common Stock Equivalents (or a combination of units thereof)
involving a Variable Rate Transaction, other than in connection with an Exempt Issuance. The Investor shall be entitled to seek
injunctive relief against the Company to preclude any such issuance, which remedy shall be in addition to any right to collect
damages, without the necessity of showing economic loss and without any bond or other security being required. “Common
Stock Equivalents” means any securities of the Company which entitle the holder thereof to acquire at any time Common
Stock, including, without limitation, any debt, preferred stock, rights, options, warrants or other instrument that is at any time
convertible into or exercisable or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock. “Variable
Rate Transaction” means a transaction in which the Company (i) issues or sells any debt or equity securities that are
convertible into, exchangeable or exercisable for, or include the right to receive additional shares of Common Stock or Common
Stock Equivalents either (A) at a conversion price, exercise price, exchange rate or other price that is based upon and/or varies
with the trading prices of or quotations for the Common Stock at any time after the initial issuance of such debt or equity securities
(including, without limitation, pursuant to any “cashless exercise” provision), or (B) with a conversion, exercise
or exchange price that is subject to being reset at some future date after the initial issuance of such debt or equity security
or upon the occurrence of specified or contingent events directly or indirectly related to the business of the Company or the market
for the Common Stock (including, without limitation, any “full ratchet” or “weighted average” anti-dilution
provisions, but not including any standard anti-dilution protection for any reorganization, recapitalization, non-cash dividend,
stock split or other similar transaction), (ii) issues or sells any debt or equity securities, including without limitation, Common
Stock or Common Stock Equivalents, either (A) at a price that is subject to being reset at some future date after the initial issuance
of such debt or equity security or upon the occurrence of specified or contingent events directly or indirectly related to the
business of the Company or the market for the Common Stock (other than standard anti-dilution protection for any reorganization,
recapitalization, non-cash dividend, stock split or other similar transaction), or (B) that is subject to or contains any put,
call, redemption, buy-back, price-reset or other similar provision or mechanism (including, without limitation, a “Black-Scholes”
put or call right) that provides for the issuance of additional debt or equity securities of the Company or the payment of cash
by the Company, or (iii) enters into any agreement, including, but not limited to, an “equity line of credit”, “at-the-market
offering” or other continuous offering or similar offering of Common Stock or Common Stock Equivalents, whereby the Company
may sell Common Stock or Common Stock Equivalents at a future determined price. “Exempt Issuance” means the
issuance of (a) Common Stock or options to employees, officers, directors or vendors of the Company pursuant to any stock or option
plan duly adopted for such purpose, by the Board of Directors or a majority of the members of a committee of directors established
for such purpose, (b) (1) any Securities issued to the Investor pursuant to this Agreement, (2) any securities issued upon the
exercise or exchange of or conversion of any shares of Common Stock or Common Stock Equivalents held by the Investor at any time,
(3) any securities issued upon the exercise or exchange of or conversion of any Common Stock Equivalents issued and outstanding
on the date of this Agreement, provided that such securities referred to in this clause (3) have not been amended since the date
of this Agreement to increase the number of such securities or to decrease the exercise price, exchange price or conversion price
of such securities, or (4) any securities to be issued by the Company to the Investor pursuant to any other agreement between the
Company and the Investor, (c) securities issued pursuant to acquisitions, divestitures, partnerships, licenses, collaborations
or strategic transactions approved by the Board of Directors or a majority of the members of a committee of directors established
for such purpose, which acquisitions, divestitures, partnerships, licenses, collaborations or strategic transactions can have a
Variable Rate Transaction component, provided that any such issuance shall only be to a Person (or to the equity holders of a Person)
which is, itself or through its subsidiaries, an operating company or an asset in a business synergistic with the business of the
Company and shall provide to the Company additional benefits in addition to the investment of funds, but shall not include a transaction
in which the Company is issuing securities primarily for the purpose of raising capital or to an entity whose primary business
is investing in securities, or (d) Common Stock issued pursuant to an “at-the-market offering” by the Company exclusively
through a registered broker-dealer acting as agent of the Company pursuant to a written agreement between the Company and such
registered broker-dealer.


 



    	 	-21-	 



    	 



    

 


		6.	TRANSFER AGENT INSTRUCTIONS.



 


(a)         
On the date of this Agreement, the Company shall issue irrevocable instructions to the Transfer Agent substantially in the form
attached hereto as Exhibit D to issue the Commitment Shares in accordance with the terms of this Agreement (the “Irrevocable
Transfer Agent Instructions”). The certificate(s) or book-entry statement(s) representing the Commitment Shares, except
as set forth below, shall bear the following restrictive legend (the “Restrictive Legend”):


 


THE SECURITIES REPRESENTED BY THIS CERTIFICATE
HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THE SECURITIES HAVE
BEEN ACQUIRED FOR INVESTMENT AND MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
STATEMENT FOR THE SECURITIES UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS, UNLESS SOLD PURSUANT
TO: (1) RULE 144 UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR (2) AN OPINION OF HOLDER’S COUNSEL, IN A CUSTOMARY FORM,
THAT REGISTRATION IS NOT REQUIRED UNDER SAID ACT OR APPLICABLE STATE SECURITIES LAWS.


 


(b)          On
the earlier of (i) the Commencement Date and (ii) such time that the Investor shall request, provided all conditions of Rule 144
under the Securities Act are met, the Company shall, no later than two (2) Business Days following the delivery by the Investor
to the Transfer Agent of one or more legended certificates or book-entry statements representing the Commitment Shares (which certificates
or book-entry statements the Investor shall promptly deliver on or prior to the first to occur of the events described in clauses
(i) and (ii) of this sentence), as directed by the Investor, issue and deliver (or cause to be issued and delivered) to the Investor,
as requested by the Investor, either: (A) a certificate or book-entry statement representing such Commitment Shares that is free
from all restrictive and other legends or (B) a number of shares of Common Stock equal to the number of Commitment Shares represented
by the certificate(s) or book-entry statement(s) so delivered by the Investor as DWAC Shares. The Company shall take all actions
to carry out the intent and accomplish the purposes of the immediately preceding sentence, including, without limitation, delivering
all such legal opinions, consents, certificates, resolutions and instructions to the Transfer Agent, and any successor transfer
agent of the Company, as may be requested from time to time by the Investor or necessary or desirable to carry out the intent and
accomplish the purposes of the immediately preceding sentence. On the Commencement Date, the Company shall issue to the Transfer
Agent, and any subsequent transfer agent, (i) irrevocable instructions in the form substantially similar to those used by the Investor
in substantially similar transactions (the “Commencement Irrevocable Transfer Agent Instructions”) and (ii)
the notice of effectiveness of the Registration Statement in the form attached as an exhibit to the Registration Rights Agreement
(the “Notice of Effectiveness of Registration Statement”), in each case to issue the Commitment Shares and the
Purchase Shares in accordance with the terms of this Agreement and the Registration Rights Agreement. All Purchase Shares to be
issued from and after Commencement to or for the benefit of the Investor pursuant to this Agreement shall be issued only as DWAC
Shares. The Company represents and warrants to the Investor that, while this Agreement is effective, no instruction other than
the Commencement Irrevocable Transfer Agent Instructions and the Notice of Effectiveness of Registration Statement referred to
in this Section 6(b) will be given by the Company to the Transfer Agent with respect to the Purchase Shares or the Commitment
Shares from and after Commencement, and the Purchase Shares and the Commitment Shares covered by the Registration Statement shall
otherwise be freely transferable on the books and records of the Company. The Company agrees that if the Company fails to fully
comply with the provisions of this Section 6(b) within five (5) Business Days of the Investor providing the deliveries referred
to above, the Company shall, at the Investor’s written instruction, purchase such shares of Common Stock containing the Restrictive
Legend from the Investor at the greater of the (i) purchase price paid for such shares of Common Stock (as applicable) and (ii)
the Closing Sale Price of the Common Stock on the date of the Investor’s written instruction.


 



    	 	-22-	 



    	 



    

 


		7.	CONDITIONS TO THE COMPANY'S RIGHT TO COMMENCE SALES OF SHARES OF COMMON STOCK.





 


The right of the Company hereunder
to commence sales of the Purchase Shares on the Commencement Date is subject to the satisfaction of each of the following conditions:


 


(a)          The Investor shall have
executed each of the Transaction Documents and delivered the same to the Company;


 


(b)          The Registration Statement
covering the resale of the Purchase Shares and all of the Commitment Shares shall have been declared effective under the Securities
Act by the SEC, and no stop order with respect to the Registration Statement shall be pending or threatened by the SEC; and 


 


(c) The representations
and warranties of the Investor shall be true and correct in all material respects as of the date hereof and as of the Commencement
Date.


 


		8.	CONDITIONS TO THE INVESTOR'S OBLIGATION TO PURCHASE SHARES OF COMMON STOCK.



 


The obligation of the Investor to
buy Purchase Shares under this Agreement is subject to the satisfaction of each of the following conditions on or prior to the
Commencement Date and, once such conditions have been initially satisfied, there shall not be any ongoing obligation to satisfy
such conditions after the Commencement has occurred:


 


(a)          The
Company shall have executed each of the Transaction Documents and delivered the same to the Investor;


 


(b)          The
Company shall have issued or caused to be issued to the Investor (i) one or more certificates or book-entry statements representing
the Commitment Shares free from all restrictive and other legends or (ii) a number of shares of Common Stock equal to the number
of Commitment Shares as DWAC Shares, in each case in accordance with Section 6(b);


 


(c)          The
Common Stock shall be listed or quoted on the Principal Market, trading in the Common Stock shall not have been within the last
365 days suspended by the SEC or the Principal Market, and all Securities to be issued by the Company to the Investor pursuant
to this Agreement shall have been approved for listing or quotation on the Principal Market in accordance with the applicable rules
and regulations of the Principal Market, subject only to official notice of issuance;


 


(d)          The
Investor shall have received the opinion of the Company's legal counsel dated as of the Commencement Date substantially in the
form heretofore agreed by the parties hereto;


 


(e)          The
representations and warranties of the Company shall be true and correct in all material respects (except to the extent that any
of such representations and warranties is already qualified as to materiality in Section 4 above, in which case, the portion of
such representations and warranties so qualified shall be true and correct without further qualification) as of the date hereof
and as of the Commencement Date as though made at that time (except for representations and warranties that speak as of a specific
date, which shall be true and correct as of such date) and the Company shall have performed, satisfied and complied with the covenants,
agreements and conditions required by the Transaction Documents to be performed, satisfied or complied with by the Company at or
prior to the Commencement Date. The Investor shall have received a certificate, executed by the CEO, President or CFO of the Company,
dated as of the Commencement Date, to the foregoing effect in the form attached hereto as Exhibit A;


 



    	 	-23-	 



    	 



    

 


(f)           The
Board of Directors of the Company shall have adopted resolutions in substantially the form attached hereto as Exhibit B
which shall be in full force and effect without any amendment or supplement thereto as of the Commencement Date;


 


(g)          As
of the Commencement Date, the Company shall have reserved out of its authorized and unissued Common Stock, solely for the purpose
of effecting purchases of Purchase Shares hereunder, 15,000,000 shares of Common Stock;


 


(h)          The
Commencement Irrevocable Transfer Agent Instructions and the Notice of Effectiveness of Registration Statement each shall have
been delivered to and acknowledged in writing by the Company and the Company's Transfer Agent (or any successor transfer agent);


 


(i)           The
Company shall have delivered to the Investor a certificate evidencing the incorporation and good standing of the Company in the
State of Delaware issued by the Secretary of State of the State of Delaware as of a date within ten (10) Business Days of the Commencement
Date;


 


(j)           The
Company shall have delivered to the Investor a certified copy of the Certificate of Incorporation as certified by the Secretary
of State of the State of Delaware within ten (10) Business Days of the Commencement Date;


 


(k)          The
Company shall have delivered to the Investor a secretary's certificate executed by the Secretary of the Company, dated as of the
Commencement Date, in the form attached hereto as Exhibit C;


 


(l)           The
Registration Statement covering the resale of the Purchase Shares and all of the Commitment Shares shall have been declared effective
under the Securities Act by the SEC, and no stop order with respect to the Registration Statement shall be pending or threatened
by the SEC. The Company shall have prepared and filed with the SEC, not later than one (1) Business Day after the effective date
of the Registration Statement, a final and complete prospectus (the preliminary form of which shall be included in the Registration
Statement) and shall have delivered to the Investor a true and complete copy thereof. Such prospectus shall be current and available
for the resale by the Investor of all of the Securities covered thereby. The Current Report shall have been filed with the SEC,
as required pursuant to Section 5(a). All reports, schedules, registrations, forms, statements, information and other documents
required to have been filed by the Company with the SEC at or prior to the Commencement Date pursuant to the reporting requirements
of the Exchange Act shall have been filed with the SEC within the applicable time periods prescribed for such filings under the
Exchange Act;


 


(m)         No
Event of Default has occurred, or any event which, after notice and/or lapse of time, would become an Event of Default has occurred;


 


(n)          All
federal, state and local governmental laws, rules and regulations applicable to the transactions contemplated by the Transaction
Documents and necessary for the execution, delivery and performance of the Transaction Documents and the consummation of the transactions
contemplated thereby in accordance with the terms thereof shall have been complied with, and all consents, authorizations and orders
of, and all filings and registrations with, all federal, state and local courts or governmental agencies and all federal, state
and local regulatory or self-regulatory agencies necessary for the execution, delivery and performance of the Transaction Documents
and the consummation of the transactions contemplated thereby in accordance with the terms thereof shall have been obtained or
made, including, without limitation, in each case those required under the Securities Act, the Exchange Act, applicable state securities
or “Blue Sky” laws or applicable rules and regulations of the Principal Market, or otherwise required by the SEC, the
Principal Market or any state securities regulators;


 



    	 	-24-	 



    	 



    

 


(o)          No
statute, regulation, order, decree, writ, ruling or injunction shall have been enacted, entered, promulgated, threatened or endorsed
by any federal, state, local or foreign court or governmental authority of competent jurisdiction which prohibits the consummation
of or which would materially modify or delay any of the transactions contemplated by the Transaction Documents; and


 


(p)          No
action, suit or proceeding before any federal, state, local or foreign arbitrator or any court or governmental authority of competent
jurisdiction shall have been commenced or threatened, and no inquiry or investigation by any federal, state, local or foreign governmental
authority of competent jurisdiction shall have been commenced or threatened, against the Company, or any of the officers, directors
or affiliates of the Company, seeking to restrain, prevent or change the transactions contemplated by the Transaction Documents,
or seeking material damages in connection with such transactions.


 


		9.	INDEMNIFICATION. 



 


In consideration of the Investor's
execution and delivery of the Transaction Documents and acquiring the Securities hereunder and in addition to all of the Company's
other obligations under the Transaction Documents, the Company shall defend, protect, indemnify and hold harmless the Investor
and all of its affiliates, stockholders, officers, directors, employees and direct or indirect investors and any of the foregoing
Person's agents or other representatives (including, without limitation, those retained in connection with the transactions contemplated
by this Agreement) (collectively, the "Indemnitees") from and against any and all actions, causes of action, suits,
claims, losses, costs, penalties, fees, liabilities and damages, and expenses in connection therewith (irrespective of whether
any such Indemnitee is a party to the action for which indemnification hereunder is sought), and including reasonable attorneys'
fees and disbursements (the "Indemnified Liabilities"), incurred by any Indemnitee as a result of, or arising
out of, or relating to (a) any misrepresentation or breach of any representation or warranty made by the Company in the Transaction
Documents or any other certificate, instrument or document contemplated hereby or thereby, (b) any breach of any covenant, agreement
or obligation of the Company contained in the Transaction Documents or any other certificate, instrument or document contemplated
hereby or thereby, or (c) any cause of action, suit or claim brought or made against such Indemnitee and arising out of or resulting
from the execution, delivery, performance or enforcement of the Transaction Documents or any other certificate, instrument or document
contemplated hereby or thereby, other than, in the case of clause (c), with respect to Indemnified Liabilities which directly and
primarily result from the fraud, gross negligence or willful misconduct of an Indemnitee. The indemnity in this Section 9 shall
not apply to amounts paid in settlement of any claim if such settlement is effected without the prior written consent of the Company,
which consent shall not be unreasonably withheld, conditioned or delayed. To the extent that the foregoing undertaking by the Company
may be unenforceable for any reason, the Company shall make the maximum contribution to the payment and satisfaction of each of
the Indemnified Liabilities which is permissible under applicable law. Payment under this indemnification shall be made within
thirty (30) days from the date Investor makes written request for it. A certificate containing reasonable detail as to the amount
of such indemnification submitted to the Company by Investor shall be conclusive evidence, absent manifest error, of the amount
due from the Company to Investor. If any action shall be brought against any Indemnitee in respect of which indemnity may be sought
pursuant to this Agreement, such Indemnitee shall promptly notify the Company in writing, and the Company shall have the right
to assume the defense thereof with counsel of its own choosing reasonably acceptable to the Indemnitee. Any Indemnitee shall have
the right to employ separate counsel in any such action and participate in the defense thereof, but the fees and expenses of such
counsel shall be at the expense of such Indemnitee, except to the extent that (i) the employment thereof has been specifically
authorized by the Company in writing, (ii) the Company has failed after a reasonable period of time to assume such defense
and to employ counsel or (iii) in such action there is, in the reasonable opinion of such separate counsel, a material conflict
on any material issue between the position of the Company and the position of such Indemnitee, in which case the Company shall
be responsible for the reasonable fees and expenses of no more than one such separate counsel.


 



    	 	-25-	 



    	 



    

 


		10.	EVENTS OF DEFAULT.



 


An "Event of Default"
shall be deemed to have occurred at any time as any of the following events occurs:


 


(a)          the
effectiveness of a registration statement registering the resale of the Securities lapses for any reason (including, without limitation,
the issuance of a stop order or similar order) or such registration statement (or the prospectus forming a part thereof) is unavailable
to the Investor for resale of any or all of the Securities to be issued to the Investor under the Transaction Documents, and such
lapse or unavailability continues for a period of ten (10) consecutive Business Days or for more than an aggregate of thirty (30)
Business Days in any 365-day period, but excluding a lapse or unavailability where (i) the Company terminates a registration statement
after the Investor has confirmed in writing that all of the Securities covered thereby have been resold or (ii) the Company supersedes
one registration statement with another registration statement, including (without limitation) by terminating a prior registration
statement when it is effectively replaced with a new registration statement covering Securities (provided in the case of this clause
(ii) that all of the Securities covered by the superseded (or terminated) registration statement that have not theretofore been
resold are included in the superseding (or new) registration statement);


 


(b)          the
suspension of the Common Stock from trading on the Principal Market for a period of one (1) Business Day, provided that the Company
may not direct the Investor to purchase any shares of Common Stock during any such suspension;


 


(c)          the
delisting of the Common Stock from the OTCQB operated by the OTC Markets Group, Inc. (or nationally recognized successor thereto),
unless the Common Stock is immediately thereafter trading on the New York Stock Exchange, The NASDAQ Capital Market, The NASDAQ
Global Market, The NASDAQ Global Select Market, the NYSE American, the NYSE Arca, the OTC Bulletin Board or the OTCQX operated
by the OTC Markets Group, Inc. (or nationally recognized successor to any of the foregoing);


 


(d)          the
failure for any reason by the Transfer Agent to issue Purchase Shares to the Investor within two (2) Business Days after the Purchase
Date, Accelerated Purchase Date or Additional Accelerated Purchase Date, as applicable, on which the Investor is entitled to receive
such Purchase Shares;


 


(e)          the
Company breaches any representation, warranty or covenant under any Transaction Document if such breach would reasonably be expected
to have a Material Adverse Effect and except, in the case of a breach of a covenant which is reasonably curable, only if such breach
continues for a period of at least five (5) Business Days;


 


(f)           if
any Person commences a proceeding against the Company pursuant to or within the meaning of any Bankruptcy Law;


 



    	 	-26-	 



    	 



    

 


(g)          if
the Company, pursuant to or within the meaning of any Bankruptcy Law, (i) commences a voluntary case, (ii) consents to the entry
of an order for relief against it in an involuntary case, (iii) consents to the appointment of a Custodian of it or for all or
substantially all of its property, or (iv) makes a general assignment for the benefit of its creditors or is generally unable to
pay its debts as the same become due;


 


(h)          a
court of competent jurisdiction enters an order or decree under any Bankruptcy Law that (i) is for relief against the Company in
an involuntary case, (ii) appoints a Custodian of the Company or for all or substantially all of its property, or (iii) orders
the liquidation of the Company or any Subsidiary; or


 


(i)           if
at any time the Company is not eligible to transfer its Common Stock electronically as DWAC Shares.


 


In addition to any other rights and remedies under applicable
law and this Agreement, so long as an Event of Default has occurred and is continuing, or if any event which, after notice and/or
lapse of time, would become an Event of Default has occurred and is continuing, the Company shall not deliver to the Investor any
Regular Purchase Notice, Accelerated Purchase Notice or Additional Accelerated Purchase Notice.


 


		11.	TERMINATION



 


This Agreement may be terminated
only as follows:


 


(a)          If
pursuant to or within the meaning of any Bankruptcy Law, the Company commences a voluntary case or any Person commences a proceeding
against the Company, a Custodian is appointed for the Company or for all or substantially all of its property, or the Company makes
a general assignment for the benefit of its creditors (any of which would be an Event of Default as described in Sections 10(f),
10(g) and 10(h) hereof), this Agreement shall automatically terminate without any liability or payment to the Company
(except as set forth below) without further action or notice by any Person.


 


(b)          In
the event that (i) the Company fails to file the Registration Statement with the SEC within the period specified in Section
5(a) hereof in accordance with the terms of the Registration Rights Agreement or (ii) the Commencement shall not have occurred
on or before March 31, 2020, due to the failure to satisfy the conditions set forth in Sections 7 and 8 above with
respect to the Commencement, then, in the case of clause (i) above, this Agreement may be terminated by the Investor at any time
prior to the filing of the Registration Statement and, in the case of clause (ii) above, this Agreement may be terminated by either
party at the close of business on March 31, 2020 or thereafter, in each case without liability of such party to the other party
(except as set forth below); provided, however, that the right to terminate this Agreement under this Section 11(b) shall
not be available to any party if such party is then in breach of any covenant or agreement contained in this Agreement or any representation
or warranty of such party contained in this Agreement fails to be true and correct such that the conditions set forth in Section
7(c) or Section 8(e), as applicable, could not then be satisfied.


 


(c)        
At any time after the Commencement Date, the Company shall have the option to terminate this Agreement for any reason or for no
reason by delivering notice (a “Company Termination Notice”) to the Investor electing to terminate this Agreement
without any liability whatsoever of any party to any other party under this Agreement (except as set forth below). The Company
Termination Notice shall not be effective until one (1) Business Day after it has been received by the Investor.


 


(d)          This
Agreement shall automatically terminate on the date that the Company sells and the Investor purchases the full Available Amount
as provided herein, without any action or notice on the part of any party and without any liability whatsoever of any party to
any other party under this Agreement (except as set forth below).


 



    	 	-27-	 



    	 



    

 


(e)          If,
for any reason or for no reason, the full Available Amount has not been purchased in accordance with Section 2 of this
Agreement by the Maturity Date, this Agreement shall automatically terminate on the Maturity Date, without any action or notice
on the part of any party and without any liability whatsoever of any party to any other party under this Agreement (except as set
forth below).


 


Except as set forth in Sections 11(a) (in respect
of an Event of Default under Sections 10(f), 10(g) and 10(h)), 11(d) and 11(e), any termination
of this Agreement pursuant to this Section 11 shall be effected by written notice from the Company to the Investor, or the
Investor to the Company, as the case may be, setting forth the basis for the termination hereof. The representations and warranties
and covenants of the Company and the Investor contained in Sections 3, 4, 5, and 6 hereof, the indemnification
provisions set forth in Section 9 hereof and the agreements and covenants set forth in Sections 10, 11 and
12 shall survive the execution and delivery of this Agreement and any termination of this Agreement. No termination of this
Agreement shall (i) affect the Company’s or the Investor’s rights or obligations under (A) this Agreement with respect
to pending Regular Purchases, Accelerated Purchases or Additional Accelerated Purchases and the Company and the Investor shall
complete their respective obligations with respect to any pending Regular Purchases, Accelerated Purchases and Additional Accelerated
Purchases under this Agreement and (B) the Registration Rights Agreement, which shall survive any such termination, or (ii) be
deemed to release the Company or the Investor from any liability for intentional misrepresentation or willful breach of any of
the Transaction Documents.


 


		12.	MISCELLANEOUS.



 


(a)          Governing
Law; Jurisdiction; Jury Trial. The corporate laws of the State of Delaware shall govern all issues concerning the relative
rights of the Company and its stockholders. All other questions concerning the construction, validity, enforcement and interpretation
of this Agreement, the Registration Rights Agreement and the other Transaction Documents shall be governed by the internal laws
of the State of Illinois, without giving effect to any choice of law or conflict of law provision or rule (whether of the State
of Illinois or any other jurisdictions) that would cause the application of the laws of any jurisdictions other than the State
of Illinois. Each party hereby irrevocably submits to the exclusive jurisdiction of the state and federal courts sitting in the
State of Illinois, County of Cook, for the adjudication of any dispute hereunder or under the other Transaction Documents or in
connection herewith or therewith, or with any transaction contemplated hereby or discussed herein, and hereby irrevocably waives,
and agrees not to assert in any suit, action or proceeding, any claim that it is not personally subject to the jurisdiction of
any such court, that such suit, action or proceeding is brought in an inconvenient forum or that the venue of such suit, action
or proceeding is improper. Each party hereby irrevocably waives personal service of process and consents to process being served
in any such suit, action or proceeding by mailing a copy thereof to such party at the address for such notices to it under this
Agreement and agrees that such service shall constitute good and sufficient service of process and notice thereof. Nothing contained
herein shall be deemed to limit in any way any right to serve process in any manner permitted by law. EACH PARTY HEREBY IRREVOCABLY
WAIVES ANY RIGHT IT MAY HAVE, AND AGREES NOT TO REQUEST, A JURY TRIAL FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN CONNECTION
HEREWITH OR ARISING OUT OF THIS AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY.


 


(b)          Counterparts.
This Agreement may be executed in two or more identical counterparts, all of which shall be considered one and the same agreement
and shall become effective when counterparts have been signed by each party and delivered to the other party; provided that a facsimile
signature or signature delivered by e-mail in a “.pdf” format data file shall be considered due execution and shall
be binding upon the signatory thereto with the same force and effect as if the signature were an original signature.


 



    	 	-28-	 



    	 



    

 


(c)          Headings.
The headings of this Agreement are for convenience of reference and shall not form part of, or affect the interpretation of, this
Agreement.


 


(d)          Severability.
If any provision of this Agreement shall be invalid or unenforceable in any jurisdiction, such invalidity or unenforceability shall
not affect the validity or enforceability of the remainder of this Agreement in that jurisdiction or the validity or enforceability
of any provision of this Agreement in any other jurisdiction.


 


(e)          Entire
Agreement. The Transaction Documents supersede all other prior oral or written agreements between the Investor, the Company,
their affiliates and Persons acting on their behalf with respect to the subject matter thereof, and this Agreement, the other Transaction
Documents and the instruments referenced herein contain the entire understanding of the parties with respect to the matters covered
herein and therein and, except as specifically set forth herein or therein, neither the Company nor the Investor makes any representation,
warranty, covenant or undertaking with respect to such matters. The Company acknowledges and agrees that is has not relied on,
in any manner whatsoever, any representations or statements, written or oral, other than as expressly set forth in the Transaction
Documents.


 


(f)           Notices.
Any notices, consents or other communications required or permitted to be given under the terms of this Agreement must be in writing
and will be deemed to have been delivered: (i) upon receipt when delivered personally; (ii) upon receipt when sent by facsimile
or email (provided confirmation of transmission is mechanically or electronically generated and kept on file by the sending party);
or (iii) one Business Day after deposit with a nationally recognized overnight delivery service, in each case properly addressed
to the party to receive the same. The addresses for such communications shall be:


 


If to the Company:


Humanigen, Inc.


533 Airport Boulevard, Suite 200


Burlingame, CA 94010


	Telephone:	(650) 243-3100
	E-mail:	cdurrant@humanigen.com
	Attention:  	Cameron Durrant, Chairman and Chief Executive Officer


 


With a copy to (which shall not constitute
notice or service of process):


Polsinelli PC


1401 Eye Street, NW, Suite 800


Washington, DC 20005


	Telephone:	(202) 783-3300
	E-mail:	kvold@polsinelli.com
	Attention:	Kevin L. Vold, Esq.


 


If to the Investor:


Lincoln Park Capital Fund, LLC


440 North Wells, Suite 410


Chicago, IL 60654


	Telephone:	312-822-9300
	Facsimile:	312-822-9301
	E-mail:	jscheinfeld@lpcfunds.com/jcope@lpcfunds.com
	Attention:	Josh Scheinfeld/Jonathan Cope


 



    	 	-29-	 



    	 



    

 


With a copy to (which shall not constitute
notice or service of process):


Mintz, Levin, Cohn, Ferris,
Glovsky and Popeo, P.C.


666 Third Avenue


New York, NY 10017


	Telephone:	(212) 692-6267
	Facsimile: 	(212) 983-3115
	E-mail:	ajmarsico@mintz.com
	Attention:	Anthony J. Marsico, Esq.


 


If to the Transfer Agent:


Computershare


8742 Lucent Blvd., Suite
225


Highlands Ranch, CO 80129





	Telephone:	(303) 262-0795
	E-mail:	Jordan.Chisholm@computershare.com
	Attention:	Jordan Chisholm




 


or at such other address and/or facsimile number and/or
to the attention of such other Person as the recipient party has specified by written notice given to each other party three (3)
Business Days prior to the effectiveness of such change. Written confirmation of receipt (A) given by the recipient of such notice,
consent or other communication, (B) mechanically or electronically generated by the sender's facsimile machine or email account
containing the time, date, and recipient facsimile number or email address, as applicable, and an image of the first page of such
transmission or (C) provided by a nationally recognized overnight delivery service, shall be rebuttable evidence of personal service,
receipt by facsimile or receipt from a nationally recognized overnight delivery service in accordance with clause (i), (ii) or
(iii) above, respectively.


 


(g)          Successors
and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties and their respective successors and
assigns. The Company shall not assign this Agreement or any rights or obligations hereunder without the prior written consent of
the Investor, including by merger or consolidation. The Investor may not assign its rights or obligations under this Agreement.


 


(h)          No
Third Party Beneficiaries. This Agreement is intended for the benefit of the parties hereto and their respective permitted
successors and assigns and, except as set forth in Section 9, is not for the benefit of, nor may any provision hereof be enforced
by, any other Person.


 


(i)           Publicity.
The Company shall afford the Investor and its counsel with the opportunity to review and comment upon, shall consult with the Investor
and its counsel on the form and substance of, and shall give due consideration to all such comments from the Investor or its counsel
on, any press release, SEC filing or any other public disclosure by or on behalf of the Company relating to the Investor, its purchases
hereunder or any aspect of the Transaction Documents or the transactions contemplated thereby, not less than 24 hours prior to
the issuance, filing or public disclosure thereof. The Investor must be provided with a final version of any such press release,
SEC filing or other public disclosure at least 24 hours prior to any release, filing or use by the Company thereof. The Company
agrees and acknowledges that its failure to fully comply with this provision constitutes a Material Adverse Effect.


 



    	 	-30-	 



    	 



    

 


(j)           Further
Assurances. Each party shall do and perform, or cause to be done and performed, all such further acts and things, and shall
execute and deliver all such other agreements, certificates, instruments and documents, as the other party may reasonably request
in order to consummate and make effective, as soon as reasonably possible, the Commencement, and to carry out the intent and accomplish
the purposes of this Agreement and the consummation of the transactions contemplated hereby.


 


(k)          No
Financial Advisor, Placement Agent, Broker or Finder. The Company represents and warrants to the Investor that it has not engaged
any financial advisor, placement agent, broker or finder in connection with the transactions contemplated hereby. The Investor
represents and warrants to the Company that it has not engaged any financial advisor, placement agent, broker or finder in connection
with the transactions contemplated hereby. The Company shall be responsible for the payment of any fees or commissions, if any,
of any financial advisor, placement agent, broker or finder relating to or arising out of the transactions contemplated hereby.
The Company shall pay, and hold the Investor harmless against, any liability, loss or expense (including, without limitation, reasonable
attorneys' fees and out of pocket expenses) arising in connection with any such claim.


 


(l)           No
Strict Construction. The language used in this Agreement will be deemed to be the language chosen by the parties to express
their mutual intent, and no rules of strict construction will be applied against any party.


 


(m)         Remedies,
Other Obligations, Breaches and Injunctive Relief. The Investor’s remedies provided in this Agreement, including, without
limitation, the Investor’s remedies provided in Section 9, shall be cumulative and in addition to all other remedies available
to the Investor under this Agreement, at law or in equity (including a decree of specific performance and/or other injunctive relief),
no remedy of the Investor contained herein shall be deemed a waiver of compliance with the provisions giving rise to such remedy
and nothing herein shall limit the Investor's right to pursue actual damages for any failure by the Company to comply with the
terms of this Agreement. The Company acknowledges that a breach by it of its obligations hereunder will cause irreparable harm
to the Investor and that the remedy at law for any such breach may be inadequate. The Company therefore agrees that, in the event
of any such breach or threatened breach, the Investor shall be entitled, in addition to all other available remedies, to an injunction
restraining any breach, without the necessity of showing economic loss and without any bond or other security being required.


 


(n)          Enforcement
Costs. If: (i) this Agreement is placed by the Investor in the hands of an attorney for enforcement or is enforced by the Investor
through any legal proceeding; (ii) an attorney is retained to represent the Investor in any bankruptcy, reorganization, receivership
or other proceedings affecting creditors' rights and involving a claim under this Agreement; or (iii) an attorney is retained to
represent the Investor in any other proceedings whatsoever in connection with this Agreement, then the Company shall pay to the
Investor, as incurred by the Investor, all reasonable costs and expenses including reasonable attorneys' fees incurred in connection
therewith, in addition to all other amounts due hereunder.


 


(o)          Amendment
and Waiver; Failure or Indulgence Not Waiver. No provision of this Agreement may be amended or waived by the parties from and
after the date that is one (1) Business Day immediately preceding the initial filing of the Registration Statement with the SEC.
Subject to the immediately preceding sentence, (i) no provision of this Agreement may be amended other than by a written instrument
signed by both parties hereto and (ii) no provision of this Agreement may be waived other than in a written instrument signed by
the party against whom enforcement of such waiver is sought. No failure or delay in the exercise of any power, right or privilege
hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such power, right or privilege preclude
other or further exercise thereof or of any other right, power or privilege.


 


 


 


*   *   *   *   *


 



    	 	-31-	 



    	 



    

 


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


 


 


 


	 	THE COMPANY:
	 	 
	 	HUMANIGEN, INC.
	 	 
	 	 
	 	By: /s/ Cameron Durrant
	 	Name: Cameron Durrant
	 	Title: Chairman of the Board and Chief Executive Officer 
	 	 
	 	 
	 	INVESTOR:
	 	 
	 	LINCOLN PARK CAPITAL FUND, LLC
	 	BY: LINCOLN PARK CAPITAL, LLC
	 	BY: ROCKLEDGE CAPITAL CORPORATION
	 	 
	 	 
	 	By: /s/ Josh Scheinfeld
	 	Name: Josh Scheinfeld
	 	Title: President



 




    	 	-32-	 



    	 



    

 


EXHIBITS


 


	Exhibit A	Form of Officer’s Certificate
	Exhibit B	Form of Resolutions of Board of Directors of the Company
	Exhibit C	Form of Secretary’s Certificate
	Exhibit D	Form of Letter to Transfer Agent