Document:

Exhibit
10.99

 

AMENDMENT
TO AMENDMENT TO BUSINESS LOAN AGREEMENT, PROMISSORY NOTE AND RELATED DOCUMENTS

 

THIS
AMENDMENT TO BUSINESS LOAN AGREEMENT, PROMISSORY NOTE AND RELATED DOCUMENTS (this “Amendment”) is entered into as
of this 10th day of March, 2020, by and between COLLECTORS UNIVERSE, INC., a Delaware corporation (“Borrower”), on
the one hand, and ZIONS BANCORPORATION, N.A., dba California Bank & Trust (“Lender”), on the other hand.

 

RECITALS

 

A.
Lender has heretofore extended a revolving line of credit (together with any and all amendments thereto or modifications thereof,
the “Loan”) to Borrower in the maximum principal amount of Ten Million and No/100 Dollars ($10,000,000.00), as evidenced,
by (i) that certain Business Loan Agreement dated January 10, 2017 executed and delivered by Borrower and Lender (the “Loan
Agreement”); (ii) an Addendum to the Loan Agreement (the “Loan Agreement Addendum”) entered into by Borrower
and Lender concurrently with the Loan Agreement which amended or modified certain of the terms and provisions of the Loan Agreement
(together with any and all amendments and addenda thereto or modifications thereof made prior to the date of this Amendment),
and (iii) that certain Promissory Note dated January 10, 2017 in the original face amount of Ten Million and No/100 Dollars ($10,000,000.00)
(the “Note”), executed by Borrower in favor of Lender and (iv) an Addendum to Promissory Note (the “Note Addendum”)
entered into by Borrower and Lender concurrently with the execution and delivery of the Note by Borrower, which amended or modified
certain of the terms and provisions of the Note; (v) any amendments and addenda to or modifications of any of the aforementioned
documents entered into or furnished prior to the date of this Amendment.

 

B.
By its express terms, the Loan Agreement Addendum provides that (i) such Addendum is an integral part of the Loan Agreement and
amends and modifies the Loan Agreement in the manner and to the extent set forth in such Addendum, and (ii) in the event of any
conflict between any provisions of the Loan Agreement and any provisions of its Addendum, the provisions of the Addendum shall
control and supersede the conflicting provisions of the Loan Agreement.

 

C.
By its express terms, the Note Addendum provides that (i) such Addendum is an integral part of the Note and amends and modifies
the Note in the manner and to the extent set forth in such Addendum, and (ii) in the event of any conflict between any provisions
of the Note and any provisions of its Addendum, the provisions of the Addendum shall control and supersede the conflicting provisions
of the Note.

 

D.
The Loan Agreement, Note, and all other agreements (including the Loan Agreement Addendum and the Note Addendum), and all other
instruments and other documents executed by Borrower and Lender in connection with the Loan, as and to the extent modified by
this Amendment, shall at all times hereinafter be referred to collectively as the “Loan Documents.”

 

E.
The parties hereto each desire to amend the Loan Agreement, Note, and certain other Loan Documents, as provided herein.

 

AGREEMENT

 

1.
Recitals. The recitals set forth hereinabove are incorporated herein by this reference. Each of Borrower and Lender agrees
and acknowledges that the factual information recited above is true and correct. Unless otherwise expressly provided to the contrary
in this Amendment, all terms not expressly defined in this Amendment shall be as defined in the Loan Agreement, the Loan Agreement
Addendum or the Note or the Note Addendum, as the case may be. From and after the date of this Amendment, all references in any
of the Loan Documents to the Loan Agreement and to the Note shall mean the Loan Agreement and the Note, respectively, as amended
by this Amendment.

 

    	1

    	 

    

 

2.
Reaffirmation. This Amendment is, in part, a reaffirmation of the obligations, indebtedness and liability of Borrower to
Lender as evidenced by the Loan Documents. Therefore, Borrower acknowledges and agrees that, except as amended or modified by
this Amendment, all of the terms and conditions of the Loan Documents are and shall remain in full force and effect, without waiver
or modification of any kind whatsoever, and are ratified and confirmed in all respects.

 

3.
Amendment to Loan Agreement, Note and other Loan Documents.

 

A.
The Loan Agreement, and the Note, the Addenda thereto referenced above, and the other Loan Documents are hereby amended as follows:

 

(i)
All references to “$10,000,000.00” are hereby amended to read “$15,000,000.00”, and the amount of the
“Total Commitment” (as set forth in the Loan Agreement) shall be $15,000,000.00.

 

(ii)
All references to “Ten Million and 00/100 Dollars” are hereby amended to read “Fifteen Million and 00/100 Dollars”.

 

(iii)
All references to the Maturity and maturity date of “3-10-20” are hereby amended to read “3-10-22”.

 

(iv)
All references to “ZB, N.A., dba California Bank & Trust” are hereby amended to read “ZIONS BANCORPORATION,
N.A., dba California Bank & Trust”.

 

B.
The Note, as heretofore amended or modified by the Note Addendum, is hereby amended as follows:

 

(i)
The final three sentences of the paragraph entitled “VARIABLE INTEREST RATE” on page 1 of the Note are hereby
deleted in their entirety and replaced with the following sentences:

 

“The
Index currently is 1.00% per annum. Interest on the unpaid principal balance of this Note will be calculated as described in the
“INTEREST CALCULATION METHOD” paragraph using a rate of 2.250 percentage points over the Index, resulting in an initial
rate of 3.25%. NOTICE: Under no circumstances will the interest rate on this loan be less than 2.250% per annum or more than the
maximum rate allowed by applicable law.”

 

(ii)
The section entitled “VARIABLE RATE FLOOR” on page 1 of the Note is hereby deleted in its entirety and replaced
with the following:

 

“VARIABLE
RATE FLOOR. Notwithstanding anything to the contrary herein, if the interest rate is calculated with any LIBOR or LIBOR/Swap
rate index plus a margin, then under no circumstances will the Index be less than zero percent (0%) per annum. To the extent there
is an interest rate floor set forth in the VARIABLE INTEREST RATE which is different than the interest rate floor described in
this paragraph, then, the interest rate floor amount set forth in the VARIABLE INTEREST RATE paragraph shall be applicable. Under
no circumstances will the interest rate on this Note be less than 2.250% per annum.”

 

(iii)
The following paragraphs are hereby added to the Note immediately preceding the paragraph of the Note entitled “INTEREST
RATE OPTIONS”:

 

“LIBOR
INDEX RATE SUBSTITUTION. If the Interest Rate is calculated with any LIBOR or LIBOR/Swap rate index, if Lender determines,
in its sole discretion, that the LIBOR Base rate (“LIBOR Index”) (i) has been or imminently will be discontinued,
(ii) is no longer an industry-accepted reference rate for loans of a similar type to the Loan and/or has been superseded by an
alternative reference rate, or (iii) is no longer representative or may not be used pursuant to a public statement by the administrator
of the LIBOR index or other regulatory authority (e.g., the Federal Reserve), in each case with respect to any type of loan or
transaction, then Lender may select an alternative reference rate, which may reflect adjustments to the related spread or margin
(collectively, the “Substitute Index Rate”), to be used in lieu of the LIBOR-based interest rate set forth in the
Note and/or this Agreement (the “Pre-Substitute Rate”).

 

    	2

    	 

    

 

Lender
and Borrower acknowledge that the discontinuation of the LIBOR Index is a future event over which neither Lender nor Borrower
has influence but which will necessarily affect the Pre-Substitute Rate. Accordingly, Lender shall use reasonable efforts to select
a Substitute Index Rate that Lender in good faith believes is practical means of preserving the parties’ intent relative
to the economics of the Pre-Substitute Rate. Notwithstanding the foregoing, the parties acknowledge that, initially and/or over
time, the Substitute Index Rate will differ from the Pre-Substitute Rate. In selecting the Substitute Index Rate, Lender shall
consider to what extent and the manner in which industry-accepted substitutes for the LIBOR Index have been established, and the
parties acknowledge that different Substitute Index Rates may be selected for different types of loans and transactions. Borrower
agrees that Lender shall not be liable in any manner for its selection of a Substitute Index Rate, provided that Lender makes
such selection in good faith.

 

The
Substitute Index Rate shall be used in lieu of the Pre-Substitute Rate, and all references in this Note to the Pre-Substitute
Rate shall be deemed to refer to the Substitute Index Rate, effective as of the date specified by Lender in a written notice given
by Lender to Borrower. To the extent practicable, such notice shall be given at least 30 days prior to the effective date. The
Substitute Index Rate shall remain in effect from the effective date set forth in such notice until the Maturity Date, as such
may be extended, unless such an instance occurs where the Substitute Index Rate is no longer available, in which case the provisions
of this section will apply for purposes of replacing the Substitute Index Rate.”

 

C.
The provision entitled “Additional Indebtedness” which immediately precedes the paragraph entitled “LENDER’S
EXPENDITURES” in the Loan Agreement is hereby amended and restated in its entirety to read as follows:

 

“Additional
Indebtedness. No additional indebtedness (except for purchase money indebtedness, obligations under capitalized and operating
leases and any other borrowings heretofore or hereafter obtained from Lender) without prior Lender approval.”

 

4.
Effective Date of Amendment. This Amendment and the amendments provided for herein shall be effective as of the timely
and complete satisfaction, or waiver, of each and all of the conditions precedent set forth in Section 6 of this Amendment. From
and after the effective date of this Amendment, this Amendment and any other documents and instruments executed in connection
herewith by Borrower and/or Lender shall each constitute one of the “Loan Documents.”

 

5.
Conditions Precedent to Effectiveness of Amendment. The effectiveness of this Amendment is expressly conditioned upon the
following having occurred or Lender having received as of March 10, 2020, all of the following documents, certificates and other
instruments, in form and content reasonably satisfactory to Lender and its counsel:

 

A.
This Amendment, fully executed by Borrower; and

 

B.
Such additional information, assignments, agreements, certificates, reports, approvals, instruments, documents, and consents as
Lender may reasonably request, in connection with this Amendment and/or any of the matters which are the subject of this Amendment
including, without limitation, resolutions and/or other authorizations of Borrower evidencing approval and authorization of the
transactions contemplated hereby and the documents and instruments to be executed by Borrower in connection herewith.

 

6.
Payment of Lender’s Fees and Costs. Borrower agrees that, within seven (7) days of its receipt from Lender of a written
notice setting forth the amount of such fees and costs, it shall pay the reasonable fees and costs of Lender incurred in connection
with the preparation, negotiation, administration and execution of this Amendment and all documents being entered into in connection
with this Amendment including, but not limited to, reasonable attorneys’ fees and costs and the reasonable fees and costs
of other professionals retained by Lender in connection with this Amendment.

 

    	3

    	 

    

 

7.
Miscellaneous.

 

A.
Section headings used in this Amendment are for convenience of reference only and shall not affect the construction or interpretation
of this Amendment or the provisions hereof.

 

B.
This Amendment may be executed in one or more counterparts, but all of the counterparts shall constitute one and the same Amendment;
provided, however, that this Amendment shall not be effective and enforceable unless and until it is executed by all parties hereto.

 

C.
This Amendment and the other documents and instruments executed in connection therewith constitute the product of the negotiation
of the parties hereto and the enforcement hereof shall be interpreted in a neutral manner, and not more strongly for or against
any party based upon the source of the draftsmanship hereof.

 

D.
This Amendment and any other documents or instruments between Borrower and Lender contemplated herein, constitute the entire agreement
between them with respect to the subject matter hereof and supersede all prior agreements and understandings, both written and
oral, between Borrower and Lender with respect to the subject matter of this Amendment.

 

E.
In the event that any provision of this Amendment, or the application thereof, becomes or is declared by a court of competent
jurisdiction to be illegal, void or unenforceable, the remainder of this Amendment will continue in full force and effect and
the application of such provision to other persons or circumstances will be interpreted so as reasonably to effect the intent
of the parties hereto. Borrower and Lender further agree to negotiate in good faith in an effort to replace any such void or unenforceable
provision of this Amendment with a valid and enforceable provision that will achieve, to the maximum extent possible, the economic,
business and other purposes of such void or unenforceable provision.

 

F.
This Amendment is not a novation. The Loan Agreement and the Loan Agreement Addendum, the Note and the Note Addendum and the other
Loan Documents entered into prior to the date hereof shall remain in full force and effect and, except as amended by this Amendment,
shall remain unchanged. Nothing contained in this Amendment shall be deemed to constitute a waiver by Lender of any required performance
by Borrower or any Event of Default (as defined in the Loan Agreement) heretofore occurring under or in connection with the Loan
Agreement, the Note or any of the other Loan Documents. In the event there is a conflict between any term, condition or provision
of this Amendment, on the one hand, and any term, condition or provision of the Loan Agreement, the Loan Agreement Addendum, the
Note, the Note Addendum, or any of the other Loan Documents entered into prior to the date hereof, on the other hand, the terms,
conditions and provisions of this Amendment shall control.

 

    	4

    	 

    

 

IN
WITNESS WHEREOF, this Amendment is executed by Borrower and Lender as of the day and year first above written.

 

BORROWER:

 

COLLECTORS
UNIVERSE, INC.,

a
Delaware corporation

	 	 	 
	By:
    	/s/
    JOSEPH WALLACE 	 
	Name:
    	Joseph
    Wallace	 
	Its:
    	Senior
    Vice President and 

Chief Financial Officer/Assistant Secretary	 

 

LENDER:

 

ZIONS
BANCORPORATION, N.A.,

dba
California Bank & Trust

 

	By:	/s/
    GRANT HAMMOND	 
	Name:	Grant
    Hammond	 
	Title:	V.
    P. Portfolio Manager	 

 

    	5Exhibit 4.3

 

DESCRIPTION OF THE REGISTRANT’S
SECURITIES

REGISTERED PURSUANT TO SECTION 12 OF
THE

SECURITIES EXCHANGE ACT OF 1934

 

When used herein, the terms “we,” “our,”
and “us” refer to Stemline Therapeutics, Inc.

 

DESCRIPTION OF COMMON STOCK

 

Common Stock

 

Under the terms of
our restated certificate of incorporation, as amended, we are authorized to issue a total of 83,750,000 shares of common stock,
par value $0.0001 per share, and 5,000,000 shares of preferred stock, par value $0.0001 per share. Our common stock is listed on
The Nasdaq Capital Market and trades under the symbol “STML” and has been publicly traded since January 29, 2013.
Prior to that time, there was no public market for our common stock.

 

As of March 16, 2020,
there were 50,375,079 shares of our common stock issued and outstanding, held by 188 record stockholders.

 

Dividends

 

We have never declared
or paid any cash dividends on our common stock and do not anticipate paying any cash dividends in the foreseeable future. Any future
determination to pay dividends will be at the sole discretion of our board of directors.

 

Voting Rights

 

Holders of our common
stock are entitled to one vote for each share held on all matters submitted to a vote of stockholders and do not have cumulative
voting rights. Holders of our common stock are not entitled to vote on any amendment to our restated certificate of incorporation
that relates solely to the terms of one or more outstanding series of preferred stock. An election of directors by our stockholders
will be determined by a plurality of the votes cast by the stockholders entitled to vote on the election. Holders of common stock
are entitled to receive proportionately any dividends as may be declared by our board of directors, subject to any preferential
dividend rights or other rights of outstanding preferred stock.

 

Liquidation and Dissolution

 

In the event of our
liquidation or dissolution, the holders of common stock are entitled to receive proportionately all assets available for distribution
to stockholders after the payment of all debts and other liabilities and subject to the preferential or other rights of any outstanding
preferred stock. Holders of common stock have no preemptive, subscription, redemption, conversion or similar rights. The rights,
preferences and privileges of holders of common stock are subject to, and may be adversely affected by, the rights of the holders
of shares of any series of preferred stock that we may designate and issue in the future.

 

     

     

    

 

Transfer Agent

 

The transfer agent
and registrar for our common stock is Computershare Trust Company, N.A.

 

Anti-Takeover Provisions

 

Section 203 of the Delaware
General Corporation Law

 

We are subject to Section 203
of the Delaware General Corporation Law. Subject to certain exceptions, Section 203 prevents a publicly held Delaware corporation
from engaging in a “business combination” with any “interested stockholder” for three years following the
date that the person became an interested stockholder, unless the interested stockholder attained such status with the approval
of our board of directors or unless the business combination is approved in a prescribed manner. A “business combination”
includes, among other things, a merger or consolidation involving us and the “interested stockholder” and the sale
of more than 10% of our assets. In general, an “interested stockholder” is any entity or person beneficially owning
15% or more of our outstanding voting stock and any entity or person affiliated with or controlling or controlled by such entity
or person.

 

Staggered board; removal of directors

 

Our restated certificate
of incorporation, as amended, and our amended and restated by-laws divide our board of directors into three classes with staggered
three-year terms. In addition, a director may be removed only for cause and only by the affirmative vote of the holders of at least
75% of the votes that all our stockholders would be entitled to cast in an annual election of directors. Any vacancy on our board
of directors, including a vacancy resulting from an enlargement of our board of directors, may be filled only by vote of a majority
of our directors then in office. The classification of our board of directors and the limitations on the removal of directors and
filling of vacancies could make it more difficult for a third party to acquire, or discourage a third party from seeking to acquire,
control of our Company.

 

Super-majority voting

 

The Delaware General
Corporation Law provides generally that the affirmative vote of a majority of the shares entitled to vote on any matter is required
to amend a corporation’s certificate of incorporation or by-laws, unless a corporation’s certificate of incorporation
or by-laws, as the case may be, requires a greater percentage. Our amended and restated by-laws may be amended or repealed by a
majority vote of our board of directors or the affirmative vote of the holders of at least 75% of the votes that all our stockholders
would be entitled to cast in an annual election of directors. In addition, the affirmative vote of the holders of at least 75%
of the votes which all our stockholders would be entitled to cast in an election of directors is required to amend or repeal or
to adopt any provisions inconsistent with any of the provisions of our certificate of incorporation described in the prior two
paragraphs.

 

     2

     

    

 

Stockholder action; special meeting
of stockholders

 

Our restated certificate
of incorporation, as amended, provides that any action required or permitted to be taken by our stockholders must be effected at
a duly called annual or special meeting of such stockholders and may not be effected by any consent in writing by such stockholders.
Our restated certificate of incorporation, as amended, and our amended and restated by-laws also provide that, except as otherwise
required by law, special meetings of our stockholders can only be called by our chairman of the board, our chief executive officer
or our board of directors and business transacted at any special meeting is limited to the stated purposes of the meeting.

 

Authorized but unissued shares

 

The authorized but
unissued shares of common stock and preferred stock are available for future issuance without stockholder approval, subject to
any limitations imposed by the listing standards of The Nasdaq Capital Market. These additional shares may be used for a variety
of corporate finance transactions, acquisitions and employee benefit plans. The existence of authorized but unissued and unreserved
common stock and preferred stock could make more difficult or discourage an attempt to obtain control of us by means of a proxy
contest, tender offer, merger or otherwise.

 

DESCRIPTION OF PREFERRED STOCK

 

Preferred Stock

 

Under the terms of
our restated certificate of incorporation, as amended, our board of directors is authorized to issue up to 5,000,000 shares of
preferred stock, par value $0.0001 per share. Our board of directors may issue shares of preferred stock in one or more series
without stockholder approval, and has the discretion to determine the rights, preferences, privileges and restrictions, including
voting rights, dividend rights, conversion rights, redemption privileges and liquidation preferences, of each series of preferred
stock. We may amend from time to time our restated certificate of incorporation, as amended, to increase the number of authorized
shares of preferred stock. Any such amendment would require the approval of the holders of a majority of the voting power of the
shares entitled to vote thereon. As of March 16, 2020, we have 5,000,000 shares of preferred shares authorized, but no shares of
preferred stock outstanding.

 

It is not possible
to state the actual effect of the issuance of any shares of preferred stock upon the rights of the holders of common stock until
the board of directors determines the specific rights of the holders of preferred stock. However, effects of the issuance of preferred
stock include restricting dividends on common stock, diluting the voting power of common stock, impairing the liquidation rights
of common stock, and making it more difficult for a third party to acquire us, which could have the effect of discouraging a third
party from acquiring, or deterring a third party from paying a premium to acquire, a majority of our outstanding voting stock.
The preferred stock will, when issued, be fully paid and non-assessable.

 

     3

     

    

 

DESCRIPTION OF WARRANTS

 

We may issue warrants
to purchase shares of our common stock and/or preferred stock in one or more series together with other securities or separately.

 

DESCRIPTION OF DEBT SECURITIES

 

We may offer debt securities
which may be senior, subordinated or junior subordinated and may be convertible. The terms of our debt securities will be issued
in one or more series under an indenture to be entered into between us and a trustee. The terms of the debt securities will include
those stated in the indenture and those made part of the indenture by reference to the Trust Indenture Act of 1939, as in effect
on the date of the indenture. We have filed a copy of the form of indenture as an exhibit to our Form S-3 Registration Statement
on March 15, 2019. The indenture will be subject to and governed by the terms of the Trust Indenture Act of 1939.

 

Debt Securities

 

The aggregate principal
amount of debt securities that may be issued under the indenture is unlimited. The debt securities may be issued in one or more
series as may be authorized from time to time pursuant to a supplemental indenture entered into between us and the trustee or an
order delivered by us to the trustee.

 

General

 

One or more series
of debt securities may be sold as “original issue discount” securities. These debt securities would be sold at a substantial
discount below their stated principal amount, bearing no interest or interest at a rate which at the time of issuance is below
market rates. One or more series of debt securities may be variable rate debt securities that may be exchanged for fixed rate debt
securities.

 

Debt securities may
be issued where the amount of principal and/or interest payable is determined by reference to one or more currency exchange rates,
commodity prices, equity indices or other factors. Holders of such debt securities may receive a principal amount or a payment
of interest that is greater than or less than the amount of principal or interest otherwise payable on such dates, depending upon
the value of the applicable currencies, commodities, equity indices or other factors.

 

The term “debt
securities” includes debt securities denominated in U.S. dollars or, if specified in the applicable prospectus supplement,
in any other freely transferable currency or units based on or relating to foreign currencies.

 

     4

     

    

 

Global Securities

 

The debt securities
of a series may be issued in whole or in part in the form of one or more global securities that will be deposited with, or on behalf
of, a depositary identified in the prospectus supplement. Global securities will be issued in registered form and in either temporary
or definitive form. Unless and until it is exchanged in whole or in part for the individual debt securities, a global security
may not be transferred except as a whole by the depositary for such global security to a nominee of such depositary or by a nominee
of such depositary to such depositary or another nominee of such depositary or by such depositary or any such nominee to a successor
of such depositary or a nominee of such successor. The specific terms of the depositary arrangement with respect to any debt securities
of a series and the rights of and limitations upon owners of beneficial interests in a global security will be described in the
applicable prospectus supplement.

 

Governing Law

 

The indenture and the
debt securities shall be construed in accordance with and governed by the laws of the State of New York.

 

DESCRIPTION OF UNITS

 

We may issue, in one
more series, units comprised of shares of our common stock or preferred stock, warrants to purchase common stock or preferred stock,
debt securities or any combination of those securities. Each unit will be issued so that the holder of the unit is also the holder
of each security included in the unit. Thus, the holder of a unit will have the rights and obligations of a holder of each included
security. The unit agreement under which a unit is issued may provide that the securities included in the unit may not be held
or transferred separately, at any time or at any time before a specified date.

 

We may evidence units
by unit certificates that we issue under a separate agreement. We may issue the units under a unit agreement between us and one
or more unit agents. If we elect to enter into a unit agreement with a unit agent, the unit agent will act solely as our agent
in connection with the units and will not assume any obligation or relationship of agency or trust for or with any registered holders
of units or beneficial owners of units. We will indicate the name and address and other information regarding the unit agent in
the applicable prospectus supplement relating to a particular series of units if we elect to use a unit agent.

 

     5

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