Document:

EX-4.1

EXHIBIT 4.1

NON-NEGOTIABLE

PROMISSORY NOTE

$5,000,000

New York, NY

August 13, 2008

FOR VALUE RECEIVED, Ladenburg Thalmann Financial Services Inc., and its successors and
assigns (hereinafter called the “Maker”), unconditionally promise(s) to pay to Mark Mettelman and
Robert Bruderman, as Representatives of the shareholders of Triad Advisors, Inc., and any
successor Representatives (hereinafter the “Holder”), the principal sum of FIVE MILLION AND NO/100
DOLLARS ($5,000,000), together with interest on the principal balance hereof from time to time
outstanding, when and as set forth below:

1. Until the Maturity Date (as defined below)(unless the maturity is accelerated prior thereto
pursuant to the terms of this Note), the principal amount outstanding under this Note shall bear
interest at the rate per annum equal to two and fifty-one hundredths percent (2.51%), compounded
quarterly (the “Contract Rate”).

2. Interest shall be charged on the principal balance hereof from time to time outstanding and
shall be calculated on the basis of the actual number of days elapsed over a 365 day year.

3. Except as provided in Section 7.6 of the Merger Agreement (as defined in the Pledge
Agreement referred to below), principal and interest shall be payable in lawful money of the United
States, by wire transfer, to the account of the Holder which Holder shall designate in writing to
the Maker from time to time. Until the Maturity Date, or earlier if the maturity is accelerated
prior thereto, principal and interest shall be due and payable in twelve (12) equal quarterly
installments with each such installment in the combined amount of $433,856.34. If not accelerated
prior thereto in accordance with the terms hereof, eleven (11) quarterly installments of principal
and accrued interest shall be due and payable beginning on November 13, 2008 and the twelfth
(12th) installment, together with all then accrued and unpaid interest hereon, shall be
due and payable on the Maturity Date. If the date upon which any payment hereunder is due is not a
business day, such payment shall be made on the next succeeding business day. Notwithstanding
anything contained herein to the contrary, the obligation of Maker to make any payments under this
Note shall be subject to the off-set rights set forth in Section 7.6 of the Merger Agreement (as
defined below) and no such exercise of these rights by Maker shall be deemed an Event of Default
(as defined below).

4. If not accelerated or prepaid prior thereto in accordance with the terms hereof, the full
principal balance of this Note shall be due and payable on August 12, 2011 (the “Maturity Date”).

5. The Maker waives presentment, demand, protest and notice of protest and all requirements
necessary to hold it liable as Maker. Any failure of the Holder to exercise any right hereunder
shall not be construed as a waiver of the right to exercise the same or any other right at any time
and from time to time thereafter.

6. This Note may be prepaid in full or in part at any time without premium or penalty;
provided, however, that any and all prepayments shall be applied first to any costs
and expenses then due to the Holder, then to accrued and unpaid interest, and then to outstanding
principal payments due, in the order of maturity.

7. As used in this Note, the term “Obligations” shall mean (i) the principal balance of and
accrued interest on this Note; and (ii) all other obligations and liabilities arising under this
Note or under the Pledge Agreement (referred to herein below).

8. The following shall constitute an event of default (each an “Event of Default”):

(a) Any failure to make payment of principal or interest under this Note when due for more
than five (5) business days after the giving of written notice to the Maker; or

(b) The Maker shall: (i) make an assignment for the benefit of creditors, file a petition in
bankruptcy, petition or apply to any tribunal for the appointment of a custodian, receiver or any
trustee, or a substantial part of any of its properties or assets, or shall commence any proceeding
under any bankruptcy, reorganization, arrangement, readjustment of debt, dissolution or liquidation
law or statute of any jurisdiction, whether now or hereafter in effect; or if there shall have been
filed any such petition or application, or any such proceeding shall have been commenced against
the Maker in which an order for relief is entered or which remains undismissed for a period of
ninety (90) days or more; or the Maker by any act or omission shall indicate its consent to,
approval of or fail to timely object to any such petition, application or proceeding or order for
relief or the appointment of a custodian, receiver, or any trustee for the Maker or any substantial
part of any of its properties or assets, or shall suffer any such custodianship, receivership or
trusteeship to continue undischarged for a period of ninety (90) days or more; (ii) generally not
pay its debts as such debts become due or admit in writing its inability to pay its debts as they
mature; or (iii) be “insolvent”, as such term is defined in the Bankruptcy Code, § 11 U.S.C. §
101(31).

Upon the occurrence of an Event of Default which shall be continuing, the Holder may take any
or all of the following actions: (i) declare the Obligations to be due and payable and (ii) take
any and all actions and pursue any and all remedies when and as may be permitted by this Note or
the Pledge Agreement or by applicable law.

9. EACH OF THE MAKER AND THE HOLDER HEREBY KNOWINGLY, VOLUNTARILY, AND INTENTIONALLY WAIVES
ANY RIGHT IT OR THEY MAY HAVE TO A TRIAL BY JURY IN RESPECT OF ANY LITIGATION (INCLUDING BUT NOT
LIMITED TO ANY CLAIMS, CROSS-CLAIMS, OR THIRD PARTY CLAIMS) ARISING OUT OF, UNDER, OR IN CONNECTION
WITH THIS NOTE, OR THE TRANSACTIONS CONTEMPLATED HEREIN.

The Maker hereby specifically authorizes any action brought upon the enforcement of this Note
by the Holder to be instituted and prosecuted in either the Circuit Court of Miami-Dade County,
Florida or the United States District Court for the Southern District of Florida, at the election
of the Holder. The Maker hereby consents and submits to the personal jurisdiction of the State and
Federal courts of Florida in any action instituted by the Holder arising under or related to this
Note.

10. This is the “Note” referred to in (i) that certain Share Pledge Agreement dated the date
of this Note, by and among the Maker and the Holder (the “Pledge Agreement”) and (ii) the Merger
Agreement as defined in the Pledge Agreement. This Note is secured by the Pledged Shares referred
to in the Pledge Agreement, reference to which is hereby made for a description of the Pledged
Shares and the rights of the Holder in respect of such Pledged Shares.

11. This Note is to be construed and enforced according to the internal laws of the State of
Florida, without giving effect to principles of conflict of laws.

12. Each provision of this Note is intended to be severable and the invalidity or illegality
of any portion of this Note shall not affect the validity or legality of the remainder hereof.

13. This Note is not assignable or otherwise transferable by the Maker nor are its obligations
hereunder assumable without the prior consent of the Holder, unless the Maker agrees to remain
liable for all the Obligations. This Note is non-negotiable and may not be assigned or otherwise
transferred by the Holder without the prior consent of the Maker.

MAKER:

Ladenburg Thalmann Financial Services Inc.

By: /s/ Joseph Giovanniello, Jr.

Name: Joseph Giovanniello, Jr.

Title: SecretaryEX-4.2

Exhibit 4.2

Share Pledge Agreement

THIS AGREEMENT is made as of August 13, 2008 between Ladenburg Thalmann Financial
Services Inc., a Florida corporation (the “Pledgor”), and Mark Mettelman and Robert Bruderman, as
Representatives of the former shareholders of Triad Advisors, Inc. (the “Pledgee”).

WHEREAS, the Pledgor is the owner of 100 shares (the “Pledged Shares”) of common stock, par
value $.0001 of Triad Advisors, Inc., a Florida corporation (the “Corporation”), as a result of the
merger described in that certain Agreement and Plan of Merger (“Merger Agreement”) dated as of the
date hereof by and among the Pledgor, the Corporation, Triple Acquisition Inc. and the shareholders
of the Corporation; and

WHEREAS, the Pledgor has agreed to pledge the Pledged Shares as security for the repayment of
that certain Promissory Note in the original principal amount of $5,000,000, dated as of the date
hereof, made by Pledgor in favor of Pledgee (the “Note”);

NOW, THEREFORE, in consideration of the premises, the covenants and agreements herein
contained and for other good and valuable consideration, the receipt and sufficiency of which is
hereby acknowledged, the parties hereto agree as follows:

	1.	 	Pledge of Shares. The Pledgor hereby mortgages, pledges, charges and grants to the Pledgee a
security interest. as and by way of a fixed and specific mortgage, pledge, charge and security
interest to and in favor of the Pledgee in the Pledged Shares as a general and continuing
collateral security for the repayment of the Note.

	2.	 	Covenants, Representations and Warranties of Pledgor. The Pledgor hereby covenants,
represents and warrants to the Pledgee that:

	 	(a)	 	the Pledgor is the sole beneficial owner of the Pledged Shares;

	 	(b)	 	the Pledged Shares are not encumbered, pledged or charged in any manner
whatsoever;

	 	(c)	 	there are no outstanding calls for the Pledged Shares;

	 	(d)	 	the Pledgor has full power, authority, right and capacity to pledge, assign
and deliver the Pledged Shares as herein provided;

	 	(e)	 	the execution and delivery of this Agreement by the Pledgor and the
fulfillment of or compliance with the terms and conditions of this Agreement by the
Pledgor will not violate, contravene, breach or offend against or result in any
default under any indenture, mortgage, lease, agreement, instrument, statute,
regulation, order, judgment, decree or law to which the Pledgor is party or by which
the Pledgor is bound or affected; and

	 	(f)	 	the Pledgor will not grant, bargain, sell, convey, assign, mortgage or grant
a security interest in or otherwise deal with the Pledged Shares and will not make,
create or give any charge, mortgage, pledge, lien, assignment or security interest
upon any or all of the Pledged Shares until the Note is repaid in full.

	3.	 	Dealings with Pledged Shares. Unless and until the security hereby constituted shall become
enforceable in accordance with Section 4 of this Agreement, all dividends or other
distributions in respect of all or any of the Pledged Shares shall be for the account of the
Pledgor.

	4.	 	Enforcement of Pledge. The security hereby constituted shall become enforceable upon default
by the Pledgor, which default remains uncured for a period of seven days, in the payment of
any amount under the Note when due.

	5.	 	Remedies of Pledgee. At any time after the security hereby constituted becomes enforceable
and subject to the prior payment of the obligations under the Note, the Pledgee shall have:

	 	(a)	 	the right to sell the Pledged Shares, or any of them, upon thirty day’s prior
written notice to Pledgor by public or private sale. The Pledgor shall be entitled to
be credited with the net proceeds of any sale or other disposition of the Pledged
Shares when received by the Pledgee, and the net proceeds of such sale or other
disposition shall mean all amounts received in cash by the Pledgee upon the sale or
other disposition of all or any of the Pledged Shares, less all such indebtedness,
obligations, payments, costs and expenses as are enumerated in subparagraph 7(a) of
this Agreement; and

	 	(b)	 	the right and power to receive all dividends and other distributions in
respect of any and all of the Pledged Shares and the right and power to:

	 	(i)	 	represent the Pledged Shares at any meeting or meetings of
the shareholders of the Corporation; and

	 	(ii)	 	exercise all voting rights attached to any of the Pledged
Shares.

	6.	 	Monies Received as Trustee. After the security hereby constituted shall become enforceable,
all moneys collected or received by the Pledgor in respect of the Pledged Shares shall be
received in trust for the Pledgee and shall be forthwith paid to the Pledgee.

	7.	 	Application of Proceeds of Sale. The proceeds of sale of the Pledged Shares and any dividends
or other distributions received by the Pledgee may be applied or imputed to the Note as
follows:

	 	(a)	 	first, in payment of all costs and expenses incurred by the Pledgee or its
nominee with reference to the Pledged Shares or the realization of the security
thereof (including all reasonable legal fees and court costs) and all interest
thereon, which costs and charges shall be deemed to constitute part of the Note;

	 	(b)	 	second, in payment of the Note other than the costs and charged referred to
in subparagraph 7(a) of this Agreement in such manner as the Pledgee, in its sole
discretion, may determine; and

	 	(c)	 	third, any surplus shall be paid to the Pledgor or as otherwise required by
law.

	8.	 	Satisfaction of Note. The Pledgee shall not be required to surrender the Pledged Shares
unless and until the Note is fully satisfied. Upon satisfaction of the Note in full, the
Pledgee shall surrender the Pledged Shares and shall release the Pledgor from the provisions
of this Agreement.

	9.	 	Remedies Cumulative. All rights and remedies of the Pledgee set out in this Agreement are
cumulative and no right or remedy contained in this Agreement is intended to be exclusive, but
each shall be in addition to any other right or remedy contained in this Agreement or any
existing or further or other security document entered into between the Pledgor and the
Pledgee or now or hereafter existing at law or in equity or by statute.

	10.	 	Amendment, Waiver. This Agreement may be amended only by further written agreement executed
by the Pledgor and the Pledgee. No waiver or consent by the Pledgee to or of any breach of or
default in the observance of any terms, conditions, covenants, agreements, representations and
warranties contained in this Agreement to be observed or performed shall constitute a consent
or waiver by the Pledgee to or of any further breach of or default in this Agreement. No
exercise or enforcement of any such rights and remedies available to the Pledgee hereunder or
otherwise shall be held to exhaust any right or remedy of the Pledgee.

	11.	 	Change in Pledged Shares. If the Pledged Shares or any of them are changed, reclassified,
subdivided, consolidated or converted into a different number or class of shares or units or
otherwise, the shares or other securities resulting from the change, reclassification,
subdivision, consolidation or conversion shall be subject to the provisions of this Agreement.

	12.	 	Registration of Pledged Shares. The Pledged Shares shall be registered in the name of the
Pledgee and may from time to time be surrendered to the Corporation for cancellation,
transfer, registration or in exchange for shares or units of different denominations. The
Pledgor agrees that the responsibility of the Pledgee is limited to exercising, in regard to
the certificate or certificates representing the Pledged Shares, the same degree of care which
it gives to its own valuable property.

	13.	 	No Merger. The pledge of the Pledged Shares shall not operate by way of merger of any
indebtedness or liability of the Pledgor or of any other persons to the Pledgee under any
deed, guarantee, contract, bill of exchange, promissory note or other instrument by which the
same may now or at any time hereafter be represented or evidenced, and no judgment recovered
by the Pledgee shall merge or in any way affect the security hereby created.

	14.	 	Additional Security. This security is in addition to and not in substitution for any other
security now or hereafter held by the Pledgee.

	15.	 	Attachment. The Pledgor and the Pledgee expressly state that they intend that the pledge and
security interest hereby constituted to attach upon execution and delivery of this Agreement.
The Pledgor acknowledges receipt of a true copy of this Agreement.

	16.	 	Further Assurances. The Pledgor shall from time to time on request by the Pledgee execute
such further and other assurances, conveyances, mortgages, assignments, consents and documents
as may be reasonably necessary for the purpose of perfecting the Pledgee’s security in the
Pledged Shares.

	17.	 	Notices. All notices and other communications required or permitted hereunder shall be given
in accordance with the provisions of, and to the addresses provided in, the Merger Agreement.

	18.	 	Successors and Assigns. This Agreement shall enure to the benefit of and be binding upon the
parties hereto and their respective heirs, executors, administrators, successors and assigns.

	19.	 	Governing Law. This Agreement shall be governed by and construed in accordance with the laws
of the State of Florida. .

IN WITNESS WHEREOF the parties hereto have executed this agreement as of the date first above
written.

	 	 	 
	PLEDGEE:

	 	

	/s/ Mark C. Mettelman

	 	/s/ Robert W. Bruderman
	 

	 	 
	Mark C. Mettelman

	 	Robert W. Bruderman

PLEDGOR:

LADENBURG THALMANN FINANCIAL SERVICES INC.

By: /s/ Brian L. Heller

Name: Brian L. Heller

Title: Vice President

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