Document:

SECURITY
AGREEMENT

 

THIS
SECURITY AGREEMENT is made this 26th day of October, 2011, by and between VACCINOGEN,
INC., a Maryland corporation whose address is 5300 Westview Drive, Suite
406, Frederick, Maryland 21703 (“Debtor”), and THE ABELL FOUNDATION, INC., a
Maryland corporation whose address is 111 South Calvert Street, Suite 2300, Baltimore, Maryland 21202 (“Secured Party”).
In consideration of credit extended by Secured Party to Debtor, Debtor and Secured Party agree as follows:

 

1.          Defined
Terms. All of the terms used herein without definition which are defined by the Maryland
Uniform Commercial Code shall have the meanings assigned to them by the Maryland Uniform Commercial Code, as amended from time
to time, unless and to the extent varied by this Agreement. The use of the singular herein may also refer to the plural and vice
versa, and use of the neuter or any gender shall be applicable to any other gender or to the neuter. As used herein, the following
terms shall have the following meanings:

 

“Collateral”
shall mean the property described on Schedule A attached hereto and incorporated herein and all the proceeds thereof, including
any cash or other property to which Debtor shall become entitled for any reason whatsoever in respect of, as an addition to, in
substitution for or in exchange for any of such property, including, without limitation, any interest, dividends, distributions,
settlements or exchanges of any kind in respect of such property, whether in the ordinary course of business or, if applicable,
in connection with any merger, consolidation, reorganization, recapitalization, reclassification, stock split, liquidation or increase
or reduction of capital in respect of any issuer of any of the Collateral; provided, however, that the term “Collateral”
shall not include (a) any rights or interest of Debtor under any contract, lease, permit, license, instrument or other agreement
entered into by Debtor if under the terms of such contract, lease, permit, license, instrument or agreement, or applicable law
with respect thereto, the grant of a security interest or lien therein is prohibited and such prohibition has not been waived or
the consent of the other party to such contract, lease, permit, license, instrument or agreement has not been obtained, but only,
in each case, to the extent and for so long as, such prohibition is not terminated or rendered unenforceable or otherwise deemed
ineffective by the Uniform Commercial Code or other applicable law, or (b) any of the “Collateral” as defined in that
certain New Security Agreement made as of October 31, 2007 by and between (i) Intracel Holdings Corporation (predecessor in interest
to Debtor) and (ii) Organon BioSciences International B.V. and Organon Teknika Corporation, to the extent and for so long as the
prohibition against the granting of a security interest in such Collateral contained in such New Security Agreement remains in
effect.

 

“Documents”
shall mean, individually and collectively, all promissory notes, security agreements and other documents and instruments, whether
now existing or hereafter executed, and evidencing, securing or otherwise relating to any of the Obligations.

 

“Event
of Default” shall have the meaning given to such term in the Note.

 

“Note”
shall mean that certain Promissory Note of even date herewith made by Debtor to the order of Secured Party, as may from time to
time hereafter be amended, modified, restated, extended, renewed or replaced.

 

“Obligations”
shall mean all present and future debts, liabilities and obligations of Debtor to Secured Party hereunder and all other present
and future debts, liabilities and obligations of Debtor to Secured Party of every kind and description, matured or unmatured, under
or in connection with the Note.

 

    	 

    	 

    

 

2.          Grant
of Security Interest. Debtor hereby grants to Secured Party a security interest in the Collateral and in the proceeds thereof
in order to secure the due payment and performance of the Obligations. Contemporaneously herewith, and at such other times hereafter
as may be required by Secured Party, Debtor shall execute and deliver to Secured Party (in blank if required by Secured Party)
such assignments, control agreements, notices, transfer instruments, stock powers, sight drafts, withdrawal forms or other instruments
as may be required by Secured Party to further evidence or perfect the security interest of Secured Party in, or otherwise relating
to any of, the Collateral. Without limitation of the foregoing and to the maximum extent permitted by applicable law, Debtor specifically
authorizes Secured Party to file such financing statements and amendments thereof from time to time as Secured Party may deem necessary
or advisable to assure to Secured Party the rights and remedies intended to be conveyed by this Agreement.

 

3.          Representations
and Warranties. Debtor represents, warrants and covenants that (a) Debtor is the absolute sole owner of the Collateral
and the Collateral is and shall remain, so long as any of the Obligations remain unpaid, free and clear of all liens, security
interests, encumbrances and claims of every kind excepting only security interests of Secured Party and other Permitted Encumbrances
(as defined in the Note and Warrant Purchase Agreement), (b) Debtor
is a “registered organization” as defined in Section 9-102 of the Uniform Commercial Code “organized solely”
under the law of the State of Maryland within the meaning of Section 9-102(a)(70) of the Uniform Commercial Code, (c) the location
of the Debtor for purposes of Section 9-307 of the Uniform Commercial Code is and shall remain the State of Maryland, and (d) Debtor’s
organizational identification number for purposes of Section 9-516 of the Uniform Commercial Code is D13848726.

 

4.          Delivery
of Collateral If Debtor shall at any time become entitled to receive or shall receive any cash, certificates, passbooks,
options or rights, or any other property of any kind in respect of, in evidence of, as an addition to, in substitution for or in
exchange for any of the Collateral, Debtor agrees to accept the same as Secured Party’s agent and to deliver the same promptly
to Secured Party in the exact form received, together with such assignments, control agreements, notices, transfer instruments,
stock powers, sight drafts, withdrawal forms or other instruments relating thereto as may be required by Secured Party, duly executed
by Debtor (in blank if required by Secured Party), to be held by Secured Party, subject to the terms hereof, as part of the Collateral
and as further security for the Obligations.

 

5.          Additional
Rights of Secured Party. Any or all of the Collateral may at anytime, at the option of Secured Party, be registered in
the name of Secured Party or its nominee. In the event that any of the Collateral shall mature or otherwise become payable, Secured
Party may, in the place and stead of Debtor, cause the same to be renewed, rolled over or reinvested in such manner and upon such
terms and conditions as Secured Party may determine. At any time after the occurrence and during the continuance of an Event of
Default, if applicable with respect to any of the Collateral, Secured Party may, without notice, exercise (a) all voting, corporate
and other rights at any meeting of the shareholders or other members of the issuer of the Collateral and exercise any and all rights
of conversion, exchange, subscription or any other rights, privileges or options pertaining to the Collateral as if it were the
absolute owner thereof, including, without limitation, the right to exchange, at its discretion, any and all of the Collateral
upon any merger, consolidation, reorganization, recapitalization, reclassification, stock split, liquidation or other readjustment
in respect of any issuer of any of the Collateral, and (b) all rights with respect to the liquidation, transfer and withdrawal
of any Collateral in any securities account or other account.

 

6.          Additional
Debtor Covenants. Debtor covenants and agrees: (a) to maintain the Collateral in good condition and repair (except for
wear and tear in the ordinary course of business) and to keep insured all of the Collateral against such risks and in such amounts
as are customarily insured against by corporations in similar circumstances, (b) to promptly pay and discharge all taxes, assessments
and charges of every kind (other than those taxes, assessments and charges being contested in good faith by appropriate proceedings
and for which adequate reserves are maintained) which may be imposed upon or represent a lien or charge against any of the Collateral,
and (c) that Debtor will not, without the prior written consent of Secured Party (i) change its name, or (ii) sell, assign, transfer,
convey, license or lease any interest in any of the Collateral (or permit any of the foregoing to occur).

 

    	-2-

    	 

    

 

7.          Default
Remedies. Upon and after the occurrence and during the continuance of an Event of Default, Secured Party may, without notice
or demand, exercise in any jurisdiction in which enforcement hereof is sought, the following rights and remedies, in addition to
the rights and remedies available to Secured Party under the other Documents, the rights and remedies of a secured party under
the Uniform Commercial Code and all other rights and remedies available to Secured Party under applicable law, all such rights
and remedies being cumulative and enforceable alternatively, successively or concurrently: (a) enforce the security interests granted
to Secured Party hereunder by collecting or liquidating all or any part of the Collateral or selling, assigning, leasing, renting,
licensing or otherwise disposing of all or any part of the Collateral or any interest therein, in one or more parcels, at the same
or different times, at public or private sale or disposition, or otherwise, and (b) institute any proceeding or proceedings to
enforce the Obligations and any security interests of Secured Party. Such sales or dispositions may be made for cash, upon credit
or for future delivery. Secured Party may also resell all or any part of the Collateral. In no event shall Debtor be credited with
any part of the proceeds of liquidation, sale or other disposition of any Collateral until cash payment thereon has actually been
received by Secured Party and Secured Party shall have no obligation to delay any liquidation, sale or other disposition because
the same may result in the imposition of any forfeiture, premium or penalty, Debtor hereby acknowledging that the risk of such
forfeiture, premium or penalty is inherent in granting a security interest in the Collateral to Secured Party. Without limitation
of the foregoing, Secured Party (x) shall comply with applicable state or federal law requirements in connection with the disposition
of the Collateral, and (y) may sell the Collateral without giving any warranties with respect thereto (Secured Party being specifically
permitted to disclaim any warranties of title and the like in connection therewith), and such compliance or sale without warranties
will not be considered to adversely affect the commercial reasonableness of any sale of Collateral.

 

8.          Disposition
of Collateral. Secured Party shall give Debtor at least ten (10) calendar days prior written notice of the liquidation
of any of the Collateral, of the time and place of any public disposition of any of the Collateral, or of the time after which
any of the Collateral may be disposed of privately, which notice Debtor agrees is commercially reasonable. In the case of all liquidations,
sales or other dispositions of the Collateral, public or private, Debtor shall pay all out-of-pocket costs and expenses of every
kind paid or incurred by Secured Party relating to such liquidations, sales or other dispositions of the Collateral, including
reasonable and documented broker’s and attorney’s fees, and the proceeds of any liquidations, sales or other dispositions of the
Collateral may be applied against such costs, expenses and fees. Secured Party may be the purchaser of any or all of the Collateral
at any such sales or dispositions and thereafter hold the same in its own right free of any interests or claims of Debtor. Notwithstanding
the foregoing, upon the occurrence and during the continuance of an Event of Default, as applicable, (a) Secured Party shall be
entitled to exercise, without prior notice to Debtor, those rights provided under Section 9-607(a)(4) of the Uniform Commercial
Code, and (b) Secured Party shall not be required to provide prior notice of disposition to the extent such notice is not required
under Section 9-611(d) of the Uniform Commercial Code. In connection with any liquidation, sale or other disposition of any of
the Collateral pursuant to this Agreement, Secured Party shall have the right in the name, place and stead of Debtor, to execute
all necessary assignments or other instruments of conveyance or transfer with respect to the Collateral.

 

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9.          Further
Assurances. Debtor shall promptly execute, acknowledge and deliver to Secured Party, and do, all such additional and further
acts, things, assurances, instruments, documents (including financing statements), acts and things as Secured Party may reasonably
request from time to time to vest in and assure to Secured Party, or to protect and preserve, the Collateral, Secured Party’s security
interest therein, perfection of Secured Party’s security interest and/or Secured Party’s rights and remedies hereunder. Debtor
hereby irrevocably appoints Secured Party as Debtor’s attorney-in-fact for the purpose of executing, acknowledging and delivering
any such documents and doing such further acts and things to the extent Debtor fails or refuses to do so following any required
notice.

 

10.          Termination
of Security Interests; Release of Collateral. Upon the payment in full in cash of the Obligations, the Collateral shall
be released from all liens, security interests and encumbrances created hereby, and this Agreement, and all obligations of Debtor
hereunder, shall terminate, all without delivery of any instrument or performance of any act by any party, and all rights to the
Collateral shall revert to the Debtor. At the request and sole expense of Debtor following any such termination, Secured Party
shall promptly: (a) deliver to Debtor any Collateral held by Secured Party hereunder; and (b) execute and deliver to Debtor such
documents as Debtor shall reasonably request to evidence such termination.

 

11.          Miscellaneous.

 

(a)          Debtor
agrees that Secured Party may, but shall not be required to, pay or satisfy any taxes, charges, assessments, security interests
or liens of any kind with respect to or encumbering any of the Collateral, and Secured Party shall be the sole judge of the legality
or validity thereof and the amount necessary to discharge the same. All payments, charges, costs and expenses (including reasonable
and documented attorney’s fees) made or incurred by Secured Party in exercising any of its rights, powers or remedies under this
Agreement or applicable law shall be secured hereby and paid by Debtor to Secured Party on written demand.

 

(b)          Beyond
the exercise of reasonable care to assure the safe custody of any of the Collateral while in the possession of Secured Party, Secured
Party shall have no duty or liability to collect any cash or other property due in respect thereof or to protect or preserve any
rights pertaining thereto, and shall be relieved of all responsibility for the Collateral upon surrendering same to Debtor.

 

(c)          No
failure or delay on the part of Secured Party in exercising any right, power or remedy hereunder, under any of the Documents or
under applicable law shall operate as a waiver thereof, nor shall a single or partial exercise thereof preclude any other or further
exercise thereof or the exercise of any other right, power or remedy. The rights and remedies herein provided are cumulative and
are in addition to, and not exclusive of, any rights or remedies provided by law or by any of the Documents.

 

(d)          The
provisions of this Agreement are severable, and if any clause or provision hereof shall be held invalid or unenforceable in whole
or in part, such invalidity or unenforceability shall not affect the remainder of such clause or provision nor any other clause
or provision of this Agreement.

 

(e)          This
Agreement shall inure to the benefit of Secured Party, its successors and assigns, and shall be binding upon Debtor and Debtor’s
successors and assigns.

 

(f)          The
construction, performance and enforcement of this Agreement shall be governed by the internal laws of the State of Maryland. References
herein to the Maryland Uniform Commercial Code shall mean the Uniform Commercial Code as the same may be in effect from time to
time in the State of Maryland.

 

    	-4-

    	 

    

 

(g)          Any
notice or other communication in connection with this Agreement shall be sent by registered mail or by telecopy. If sent by registered
mail, such notice shall be deemed to have been given when received by the party to whom directed, provided that any such notice
or communication shall be addressed to a party hereto at the address given for such party on the first page hereof (or at such
other address as such party shall specify in writing to the other parties hereto). Notwithstanding the foregoing, if delivery of
any notice by registered mail is refused by the party to whom it has been directed, such notice may be sent by regular mail, and
shall be deemed given when deposited in the mail, postage prepaid, at the address given for such party on the first page hereof
(or at such other address as such party shall specify in writing to the other parties hereto). If sent by telecopy, a notice shall
be deemed to have been given when the telecopy is transmitted to the following telecopier numbers and an electronic confirmation
of receipt is received (or if transmission is not made during normal business hours on a business day, the first business day thereafter):
(a) if to Secured Party, to 410/539-6579, and (b) if to Debtor, to 301/631-2970.

 

(h)          This
Agreement may be executed in any number of counterparts and by different parties hereto on separate counterparts, each of which,
when so executed and delivered, shall be an original, but all such counterparts shall together constitute one and the same instrument.

 

(i)          The
headings contained in the titling of this Agreement are intended to be used for convenience only and shall not be used or deemed
to limit or diminish any of the provisions hereof.

 

[THE
NEXT PAGE IS THE SIGNATURE PAGE]

 

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IN
WITNESS WHEREOF, the parties hereto have executed or caused to be executed this Security Agreement under seal as of the date
first above written.

 

		 	DEBTOR:	 
	 	 	 	 
	WITNESS/ATTEST:	 	VACCINOGEN, INC.	 
	 	 	 	 	 
	 	 	By: 	/s/ Michael L. Kranda	(SEAL)
	 	 	 	Michael L. Kranda	 
	 	 	 	Chief Executive Officer	 
	 	 	 	 	 
	 	 	SECURED PARTY:	 
	 	 	 	 
	 	 	THE ABELL FOUNDATION, INC.	 
	 	 	 	 
	[ILLEGIBLE]	 	By:	/s/ Robert C. Embry, Jr.	(SEAL)
	 	 	 	Robert C. Embry, Jr.	 
	 	 	 	President	 

 

    	-6-

    	 

    

 

SCHEDULE
A 

 

Collateral

 

The Collateral
consists of the following assets and properties now owned or at any time hereafter acquired by Debtor or in which Debtor now has
or at any time hereafter may acquire any right, title or interest:

 

•      all
Accounts

•      all
Chattel Paper;

•      all
Deposit Accounts;

•      all
Documents;

•      all
Equipment;

•      all
General Intangibles;

•      all
Instruments;

•      all
Inventory;

•      all
Investment Property;

•      all
Letter-of-Credit Rights;

•      all
Supporting Obligations;

•      all
books and records pertaining to the Collateral; and

•      to
the extent not otherwise included, all Proceeds and products of any and all of the oregoing and all collateral security and guarantees
given by any person with respect to any of the foregoing.

 

Each capitalized term used in
this Schedule A but not otherwise defined in the foregoing Security Agreement, and which is defined in the Maryland Uniform
Commercial Code, shall have the meaning specified in the Maryland Uniform Commercial Code.

 

    	-7-STOCK
EXCHANGE AGREEMENT

 

THIS
STOCK EXCHANGE AGREEMENT (this “Agreement”) is dated as of June 24, 2010, by and between Vaccinogen, Inc., a Delaware corporation
(the “Company”), Intracel Holdings Corporation, a Delaware corporation (“Intracel”), and those persons and entities
listed on Exhibit A hereto (other than Intracel) (the “Tranche 12 Lenders"). Intracel and the Tranche 12 Lenders may each
be referred to herein as a "Holder" and collectively as the "Holders".

 

WHEREAS,
the Company and Holders are entering into, on the date hereof, that certain Investor Rights Agreement (the “Investor Rights
Agreement”) and Registration Rights Agreement (the “Registration Rights Agreement”) and the Company and Intracel are
entering into, on the date hereof, that certain Asset Transfer Agreement (the “Asset Transfer Agreement.” and together
with this Agreement, the Investor Rights Agreement and the Registration Rights Agreement, the “Transaction Agreements”):

 

WHEREAS,
in connection with the transaction contemplated by the Transaction Agreements, the Company is filing on the date hereof, the Third
Amended and Restated Certificate of Incorporation of the Company (the “Third Amendment”) with the Secretary of State of
the State of Delaware (the “Secretary of State”);

 

WHEREAS,
Intracel is the record owner of 1,497,728 shares of common stock, par value $.0001 per share, of the Company (“Intracel Common
Stock”) and 48,088 shares of Series AA Preferred Stock, par value $.0001 per share of the Company (“Intracel Series AA
Stock”, together with the Intracel Common Stock, the “Intracel Stock”), which constitutes all shares of any class or
series of stock of the Company owned by Intracel;

 

WHEREAS,
Intracel is obligated to use commercially reasonable efforts to transfer to the Tranche 12 Lenders twenty percent (20%) of any
shares of capital stock of the Company received by Intracel, which shares are to be allocated ratably based on the then outstanding
principal owed to each such Tranche 12 Lender under the applicable promissory notes (such obligation, the “Transfer Obligation");

 

WHEREAS,
Intracel Investment LLC ("Intracel Investment"), which is a Tranche 12 Lender, and the members of Intracel Investment each desire
to have the shares of capital stock of the Company to which Intracel Investment has a right pursuant to the Transfer Obligations
to be delivered directly to the members of Intracel Investment listed as such on the signature page hereto (the "Intracel Investment
Members");

 

WHEREAS,
Intracel has not yet transferred, or arranged for the transfer, to the Tranche 12 Lenders of any shares of the Intracel Common
Stock or the Intracel Series AA Stock pursuant to the Transfer Obligation;

 

WHEREAS,
on and subject to the terms and conditions hereof, the Company desires to repurchase the Intracel Stock and all rights associated
therewith and acquire the assets transferred to the Company pursuant to the Asset Transfer Agreement (the “Transferred Assets”),
and Intracel is willing to transfer the Intracel Stock and the Transferred Assets in exchange for shares of Series B Preferred
Stock of the Company, par value $.0001 per share, eighty percent (80%) of which will be issued to Intracel and twenty percent
(20%) of which will be issued to the Tranche 12 Lenders (including the Intracel Investment Members) in accordance with the Transfer
Obligation, and such other rights and obligations contained in the Transaction Agreements and the Third Amendment.

 

    	 

    	 

    

 

NOW,
THEREFORE, for good and valuable consideration, the receipt and sufficiency of which are acknowledged, the parties agree as follows:

 

		1.	Exchange.

 

(a)    All
shares of Intracel Stock shall be repurchased by the Company and the Transferred Assets shall be transferred to the Company pursuant
to the Asset Transfer Agreement in exchange for (i) the Company’s issuance of 3,451,766 shares of Series B Preferred Stock
(the “Exchange Shares”) to the Holders, in the proportions set forth on Schedule A hereto, and (ii) any such other
shares of stock that are issued in the future pursuant to the Investors’ Rights Agreement (the “Milestone and Anti-Dilution
Shares”) and as a dividend or distribution with regard to such Exchange Shares or Milestone and Anti-Dilution Shares. Upon
the acceptance of the Third Amendment for record by the Secretary of State, (i) the shares of Intracel Stock shall be deemed to
be repurchased by the Company and Intracel shall have no further rights with respect to the shares of Intracel Stock, and any
certificates representing shares of Intracel Stock shall be deemed to be converted into only the right to receive the Exchange
Shares, and (ii) the Exchange Shares shall have been validly issued by the Company.

 

(b)    Intracel
shall transfer all stock certificates representing shares of Intracel Stock, duly executed in blank. If such stock certificates
shall have been lost, stolen or destroyed, Intracel may tender in lieu thereof (i) an affidavit of that fact by Intracel, and
(ii) an indemnity agreement against any claim that may be made against the Company with respect to such lost, stolen or destroyed
certificates, each in form and substance reasonably satisfactory to the Company.

 

(c)    Company’s
issuance of the Exchange Shares to the each of the Tranche 12 Lenders shall be conditioned upon the applicable Tranche 12 Lender
entering into the Investor Rights Agreement and the Registration Rights Agreement.

 

(d)    Each
of the Holders acknowledges that, in satisfaction of the Transfer Obligation, twenty percent (20%) of the Exchange Shares (in
the aggregate) are being issued directly to the Tranche 12 Lenders. In addition, Intracel Investment, which is one of the Tranche
12 Lenders, and the Intracel Investment Members acknowledge that the Exchanges Shares to which Intracel Investment is entitled
pursuant to the Transfer Obligation are being issued directly to the Intracel Investment Members in accordance with their respective
interests in such entity.

 

2.           Representations,
Warranties and Covenants of the Holder. Each Holder hereby represents and warrants to the Company, and covenants for the
benefit of the Company, as follows:

 

    	-2-

    	 

    

 

(a)    In
the case of Intracel, Holder is a corporation organized, validly existing, and in good standing under the laws of the State of
Delaware;

 

(b)    This
Agreement has been duly authorized, validly executed, and delivered by the Holder and is a valid and binding agreement and obligation
of the Holder, enforceable against the Holder in accordance with its terms, subject to limitations on enforcement by general principles
of equity and by bankruptcy or other laws affecting the enforcement of creditors’ rights generally. The Holder has full
power and authority to execute and deliver the Agreement and the other agreements and documents contemplated hereby and to perform
its obligations hereunder and thereunder;

 

(c)    In
the case of Intracel, Holder has not transferred, and owns, beneficially and of record, good and marketable title to, the shares
of Intracel Stock free and clear of all liens or other encumbrances;

 

(d)    This
Agreement is made with the Holder in reliance upon the Holder’s representation to the Company, which by the Holder’s
execution of this Agreement, the Holder hereby confirms, that the Exchange Shares to be acquired by the Holder will be acquired
for investment for the Holder’s own account, not as a nominee or agent, and not with a view to the resale or distribution
of any part thereof, and that the Holder has no present intention of selling, granting any participation in, or otherwise distributing
the same. By executing this Agreement, the Holder further represents that the Holder does not presently have any contract, undertaking,
agreement or arrangement with any person to sell, transfer or grant participations to such person or to any third person, with
respect to any of the Exchange Shares.

 

(e)    The
Holder has had an opportunity to discuss the Company’s business, management, and financial affairs with the Company’s
management and the Holder has received all additional information regarding the Company that it has requested, if any.

 

(f)    The
Holder understands that the Exchange Shares have not been, and will not be, registered under the Securities Act of 1933, as amended
(the “Securities Act”), by reason of a specific exemption from the registration provisions of the Securities Act which
depends upon, among other things, the bona fide nature of the investment intent and the accuracy of the Holder’s representations
as expressed herein. The Holder understands that the Exchange Shares are "restricted securities" under applicable U.S. federal
and state securities laws and that, pursuant to these laws, the Holder must hold the. Exchange Shares indefinitely unless they
are registered with the Securities and Exchange Commission and qualified by state authorities, or an exemption from such registration
and qualification requirements is available. The Holder acknowledges that the Company has no obligation to register or qualify
the Exchange Shares for resale except as set forth in the Registration Rights Agreement. The Holder further acknowledges that
if an exemption from registration or qualification is available, it may be conditioned on various requirements including, but
not limited to, the time and manner of sale, the holding period for the Exchange Shares, and on requirements relating to the Company
which are outside of the Holder’s control, and which the Company is under no obligation and may not be able to satisfy.

 

    	-3-

    	 

    

 

(g)    The
Holder understands that no public market now exists for the Exchange Shares, and that the Company has made no assurances that
a public market will ever exist for the Shares.

 

(h)    The
Holder understands that the Exchange Shares and any securities issued in respect of or exchange for the Exchange Shares, shall
bear the legends set forth in, or required by, the other Transaction Agreements and any legend required by the securities laws
of any state to the extent such laws are applicable to the Exchange Shares represented by the certificate so legended.

 

(i)    The
Holder is an "accredited investor" as defined in Rule 501(a) of Regulation D promulgated under the Securities Act.

 

(j)    Neither
the Holder, nor any of its officers, directors, employees, agents, stockholders or partners has either directly or indirectly,
including through a broker or finder (a) engaged in any general solicitation, or (b) published any advertisement in connection
with the offer and sale of the Exchange Shares.

 

(k)    The
Holder’s principal place of business is identified on Schedule A hereto.

 

3.            Representations,
Warranties and Covenants of the Company. The Company represents and warrants to the Holders, and covenants for the benefit
of the Holders, as follows:

 

(a)    The
Company is a corporation duly incorporated, validly existing and in good standing under the laws of the State of Delaware;

 

(b)    At
the time the Exchange Shares are issued pursuant to this Agreement, (i) the Exchange Shares and the issuance thereof will have
been duly authorized by all necessary corporate action, and (ii) the Exchange Shares will be validly issued, fully paid and nonassessable,
free and clear of all liens, encumbrances and rights of refusal of any kind, except as set forth in the Third Amendment and the
Transaction Agreements;

 

(c)    This
Agreement has been duly authorized, validly executed, and delivered on behalf of the Company and is a valid and binding agreement
and obligation of the Company enforceable against the Company in accordance with its terms, subject to limitations on enforcement
by general principles of equity and by bankruptcy or other laws affecting the enforcement of creditors’ rights generally.
The Company has full power and authority to execute and deliver the Agreement and the other agreements and documents contemplated
hereby, and will have, at the time the Exchange Shares are issued pursuant to this Agreement, full power and authority to perform
its obligations hereunder and thereunder.

 

4.           Governing
Law. This Agreement and any controversy arising out of or relating to this Agreement shall be governed by and construed
in accordance with the General Corporation Law of the State of Delaware as to matters within the scope thereof, and as to all
other matters shall be governed by and construed in accordance with the internal laws of State of Delaware, without regard to
conflict of law principles that would result in the application of any law other than the law of the State of Delaware.

 

    	-4-

    	 

    

 

5.           Notices.
Any notices or other communications required or permitted hereunder shall be sent in the same manner as is contemplated by
the Investor Rights Agreement

 

6.           Entire
Agreement. This Agreement, the Investor Rights Agreement, the Asset Transfer Agreement and the Registration Rights Agreement
constitute the entire understanding and agreement of the parties with respect to the subject matter hereof and supersedes all
prior and/or contemporaneous oral or written proposals or agreements relating thereto all of which are merged herein. This Agreement
may not be amended or any provision hereof waived in whole or in part, except by a written amendment signed by both of the parties
hereto.

 

7.           Counterparts.
This Agreement may be executed in any number of counterparts each of which, when executed, shall be deemed to be an original
and all of which together shall be deemed to be one and the same instrument.

 

[THE REMAINDER
OF THIS PAGE IS INTENTIONALLY LEFT BLANK]

 

    	-5-

    	 

    

 

IN
WITNESS WHEREOF, the parties hereto have executed this Agreement to be effective as of
the date first written above.

 

	 	VACCINOGEN, INC.
	 	 
	 	By:	/s/ Michael G.
    Hanna, Jr.
	 	 	Name: Michael G. Hanna, Jr.
	 	 	Title: President and Chief Executive Officer
	 	 
	 	INTRACEL HOLDINGS CORPORATION
	 	 
	 	By:	/s/ Daniel Kane
	 	 	Name; Daniel Kane
	 	 	Title: Chairman of the Board of Directors

 

Signature Page
to Stock Exchange Agreement

 

    	 

    	 

    

 

	 	TRANCHE 12 LENDERS
	 	 
	 	DANIEL FITZGERALD
	 	 
	 	/s/ Daniel
    Fitzgerald
	 	Name: 	Daniel Fitzgerald
	 	 
	 	INTRACEL INVESTMENT LLC
	 	 
	 	By: 	/s/ Daniel Kane
	 	Name: 	Daniel Kane
	 	Title:	Managing Member
	 	 
	 	DUBLIND PARTNERS
	 	 
	 	By:	/s/ 
	 	Name:
	 	Title:
	 	 
	 	K. SCHMIDT
	 	 
	 	/s/ Kenneth M Schmidt

	 	Name:
	 	 
	 	ALLIANCE EQUITIES
	 	 
	 	By:	/s/ 
	 	Name:
	 	Title:
	 	 
	 	CHARLES LINDSAY
	 	 
	 	/s/ Charles
    Lindsay
	 	Name:
    	Charles
    Lindsay
	 	 
	 	CURTIS PARTNERSHIP
	 	 
	 	By:	/s/ Alan Curtis
	 	Name:	Alan Curtis
	 	Title	Managing General Partner

 

Signature
Page to Stock Exchange Agreement

 

    	 

    	 

    

 

	 	Title:
	 	 
	 	CHARLES DUBROFF
	 	 
	 	/s/ Charles
Dubroff

        

	 	Name:
	 	 
	 	3V SOURCEONE
	 	 
	 	By:	/s/ 
	 	Name:
	 	Title:

 

Signature Page
to Stock Exchange Agreement

 

    	 

    	 

    

 

	 	MEMBERS OF INTRACEL
    INVESTMENT LLC
	 	 
	 	Alan Cohen
	 	 
	 	/s/
    Alan Cohen
	 	Name: Alan Cohen
	 	 
	 	Daniel Kane
	 	 
	 	/s/
    Daniel Kane
	 	Name: Daniel Kane 
	 	 
	 	Albert Nassi
	 	 
	 	/s/
    Albert Nassi
	 	Name: Albert Nassi
	 	 
	 	SQ Ventures
	 	 
	 	By:	/S/
    David L. Seidenberg
	 	Name:	David
                                                                                                L. Seidenberg

	 	Title:	Managing Member
	 	 
	 	Chris Huber
	 	 
	 	/s/
    Chris J. Huber
	 	Name: Chris Huber

 

Signature Page
to Stock Exchange Agreement

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00219-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00219-of-00352.parquet"}]]