Document:

Description of Material Compensatory Arrangements

 Exhibit 10.2 
 Description of Material Compensatory Arrangements Contained in Offer Letter 

Between Sigma-Aldrich Corporation and Jan A. Bertsch 
 Sigma-Aldrich Corporation (“Company”) entered into an offer letter containing compensatory arrangements with Jan A. Bertsch in connection with her election as Executive Vice President and Chief
Financial Officer of the Company effective March 5, 2012. A description of the material compensatory arrangements contained in the offer letter is set forth below: 
  

	 	•	 	 Annual base salary of $450,000. 

  

	 	•	 	 Automobile allowance of $18,000 per year. 

  

	 	•	 	 Relocation assistance in accordance with Company’s standard executive relocation policy. 

 

	 	•	 	 One-time equity award consisting of: 

  

	 	•	 	 40,000 stock options that vest in three equal installments beginning on first anniversary of start date; and 

 

	 	•	 	 12,000 restricted stock units that vest in form of Company common stock in two equal installments on second and third anniversaries of start date.

  

	 	•	 	 Eligible for annual incentive awards with target award equal to 65% of annual base salary. Award payouts based on: 

 

	 	•	 	 Ms. Bertsch’s individual performance; and 

  

	 	•	 	 Company’s financial performance. 

  

	 	•	 	 Eligible for annual participation in Sigma-Aldrich Corporation Long-Term Incentive Plan with target award (i) equal to approximately $800,000 and
(ii) split equally between stock options and performance shares. 

  

	 	•	 	 Stock options vest in three equal installments beginning on first anniversary of grant date. 

 

	 	•	 	 Performance shares vest in form of Company common stock based on Company’s financial performance over three-year performance period.

  

	 	•	 	 Eligible to receive indemnification agreement and change in control agreement and participate in the following other executive benefit plans:

  

	 	•	 	 Supplemental Retirement Plan; and 

  

	 	•	 	 2005 Flexible Deferral Plan. 

  

	 	•	 	 Eligible for coverage under Company’s standard medical, dental, life and disability insurance programs and to participate in Company’s standard
retirement plans.Form of Global Note

 Exhibit 4.1 
 FORM OF GLOBAL SECURITY 
 THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF
THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE TRANSFERRED TO, OR REGISTERED OR EXCHANGED FOR SECURITIES REGISTERED IN THE NAME OF, ANY PERSON OTHER THAN THE
DEPOSITARY OR A NOMINEE THEREOF AND NO SUCH TRANSFER MAY BE REGISTERED, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE. EVERY SECURITY AUTHENTICATED AND DELIVERED UPON REGISTRATION OF TRANSFER OF, OR IN EXCHANGE FOR OR IN LIEU OF,
THIS SECURITY SHALL BE A GLOBAL SECURITY SUBJECT TO THE FOREGOING, EXCEPT IN SUCH LIMITED CIRCUMSTANCES. 
 UNLESS THIS CERTIFICATE IS PRESENTED
BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE, OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF
CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE,
OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN. 
 JEFFERIES GROUP, INC. 
 6.875% SENIOR NOTE, DUE APRIL 15, 2021 

CUSIP Number: 472319 AH5 
  

					
	 No. 3
	  	$	200,000,000	  

 Jefferies Group, Inc., a corporation duly organized and existing under the laws of Delaware (herein
called the “Company”, which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of Two Hundred Million
Dollars ($200,000,000) on April 15, 2021 and to pay interest thereon from April 15, 2012 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually on April 15 and October 15
in each year, commencing October 15, 2012 at the rate of 6.875% per annum, until the principal hereof is paid or made available for payment. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date
will be paid, as provided in such Indenture, to the Person in whose name this Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest, which shall be the April 1 or
October 1 (whether or not a Business Day), as the case may be, next preceding such Interest Payment Date. Any such interest not so punctually paid or duly provided for will forthwith cease to be payable to the Holder on such Regular Record Date
and may either be paid to the Person in whose name this Security (or one or more Predecessor Securities) is 

 
registered at the close of business on a Special Record Date for the payment of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be given to Holders of Securities of this
series not less than 10 days prior to such Special Record Date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the Securities of this series may be listed, and upon such
notice as may be required by such exchange, all as more fully provided in said Indenture. 
 Payment of the principal of (and
premium, if any) and any such interest on this Security will be made at the office or agency of the Company maintained for that purpose in New York, New York, in such coin or currency of the United States of America as at the time of payment is
legal tender for payment of public and private debts provided, however, that at the option of the Company payment of interest may be made by check mailed to the address of the Person entitled thereto as such address shall appear in the
Security Register. 
 Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which
further provisions shall for all purposes have the same effect as if set forth at this place. 
 Unless the certificate of
authentication hereon has been executed by the Trustee referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 

IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its corporate seal. 

Dated: April 24, 2012 
  

					
	Attest:	  	JEFFERIES GROUP, INC.
			
	  
	  	By:	  	  

	 Roland T. Kelly
 Assistant
Secretary
	  		  	 Peregrine C. Broadbent

Executive Vice President and
 Chief Financial
Officer

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION: 
 This is one of the Securities of this series designated therein referred to in the within mentioned Indenture. 
  

			
	THE BANK OF NEW YORK MELLON
		
	By:	 	  

		 	Authorized Signatory

  
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 Reverse of Note 

This Security is one of a duly authorized issue of securities of the Company (herein called the “Securities”), issued and to be
issued in one or more series under an Indenture, dated as of March 12, 2002, as supplemented by the First Supplemental Indenture, dated as of July 15, 2003 (as so supplemented, herein called the “Indenture”), between the Company
and The Bank of New York Mellon, as Trustee (herein called the “Trustee”, which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement
of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security
is one of the series designated on the face hereof limited in aggregate principal amount to $200,000,000. 
 The Securities of
this series will be redeemable, in whole at any time or in part from time to time, at the option of the Company at a redemption price equal to the greater of: 
  

	 	(i)	100% of the principal amount of the Securities to be redeemed; or 

  

	 	(ii)	the sum of the present values of the remaining scheduled payments of principal and interest thereon (not including any such portion of such payments of interest accrued
as of the date of redemption), discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate (as defined below), plus 50 basis points, 

plus, in each case, accrued interest thereon to the date of redemption. Notwithstanding the foregoing, installments of interest on Securities of this
series that are due and payable on interest payment dates falling on or prior to a redemption date will be payable on the interest payment date to the registered holders as of the close of business on the relevant record date according to the
Indenture. 
 “Comparable Treasury Issue” means the United States Treasury security selected by the Quotation Agent as
having a maturity comparable to the remaining term of the Securities of this series to be redeemed that would be utilized, at the time of selection in accordance with customary financial practice, in pricing new issues of corporate debt securities
of comparable maturity to the remaining term of such Securities. 
 “Comparable Treasury Price” means, with respect to
any redemption date, (i) the average of four Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (ii) if the Trustee obtains fewer than four
such Reference Treasury Dealer Quotations, the average of all such quotations, or (iii) if only one Reference Treasury Dealer Quotation is received, such quotation. 
 “Quotation Agent” means the Reference Treasury Dealer appointed by the Company. 
 “Reference Treasury Dealer” means (i) Citigroup Global Markets Inc. (or its affiliates that are Primary Treasury Dealers) and their respective successors; provided, however,

 
that if any of the foregoing shall cease to be a primary U.S. Government securities dealer in New York City (a “Primary Treasury Dealer”), the Company will substitute therefore another
Primary Treasury Dealer, and (ii) any other Primary Treasury Dealer selected by it. 
 “Reference Treasury Dealer
Quotations” means, with respect to each Reference Treasury Dealer and any redemption date, the average, as determined by the Trustee, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its
principal amount) quoted in writing to the trustee by such reference treasury dealer at 5:00 p.m., New York City time, on the third business day preceding such redemption date. 

“Treasury Rate” means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to
maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price of such redemption date. 

Notice of any redemption will be mailed at least 30 days but not more than 60 days before the redemption date to each registered holder
of the Securities to be redeemed. Unless the Company defaults in payment of the redemption price, on and after the redemption date, interest will cease to accrue on the Securities of this series or portions thereof called for redemption. If less
than all of the Securities of this series are to be redeemed, the Securities to be redeemed shall be selected by the Trustee by a method the Trustee deems appropriate. 
 In the event of redemption of this Security in part only, a new Security or Securities of this series and of like tenor for the unredeemed portion hereof will be issued in the name of the Holder hereof
upon the cancellation hereof. 
 The Indenture contains provisions for defeasance at any time of (l) the entire
indebtedness of this Security or (2) certain restrictive covenants and Events of Default with respect to this Security, in each case upon compliance with certain conditions set forth in the Indenture. 

If an Event of Default with respect to Securities of this series shall occur and be continuing, the principal of the Securities of this
series may be declared due and payable in the manner and with the effect provided in the Indenture. 
 The Indenture permits,
with certain exceptions as therein provided, the amendment thereof and the modification of the rights and obligations of the Company and the rights of the Holders of the Securities of each series to be affected under the Indenture at any time by the
Company and the Trustee with the consent of the Holders of a majority in principal amount of the Securities at the time Outstanding of each series to be affected. The Indenture also contains provisions permitting the Holders of specified percentages
in principal amount of the Securities of each series at the time Outstanding, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with certain provisions of the Indenture and certain past defaults under the
Indenture and their consequences. Any such consent or waiver by the Holder of this Security shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer
hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or waiver is made upon this Security. 

  
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 As provided in and subject to the provisions of the Indenture, the Holder of this Security
shall not have the right to institute any proceeding with respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a
continuing Event of Default with respect to the Securities of this series, the Holders of not less than 25% in principal amount of the Securities of this series at the time Outstanding shall have made written request to the Trustee to institute
proceedings in respect of such Event of Default as Trustee and offered the Trustee reasonable indemnity and the Trustee shall not have received from the Holders of a majority in principal amount of Securities of this series at the time Outstanding a
direction inconsistent with such request, and shall have failed to institute any such proceeding, for 60 days after receipt of such notice, request and offer of indemnity. The foregoing shall not apply to any suit instituted by the Holder of this
Security for the enforcement of any payment of principal hereof or any premium or interest hereon on or after the respective due dates expressed herein. 
 No reference herein to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of
and any premium and interest on this Security at the times, place and rate, and in the coin or currency, herein prescribed. 

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Security is registerable in the
Security Register, upon surrender of this Security for registration of transfer at the office or agency of the Company in any place where the principal of and any premium and interest on this Security are payable, duly endorsed by, or accompanied by
a written instrument of transfer in form satisfactory to the Company and the Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing, and thereupon one or more new Securities of this series and of like
tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees. 
 The Securities of this series are issuable only in registered form without coupons in denominations of $5,000 and integral multiples of $1,000 in excess thereof. As provided in the Indenture and subject
to certain limitations therein set forth, Securities of this series are exchangeable for a like aggregate principal amount of Securities of this series and of like tenor of a different authorized denomination, as requested by the Holder surrendering
the same. 
 No service charge shall be made for any such registration of transfer or exchange, but the Company or the Security
Registrar may require payment of a sum sufficient to cover any tax or other governmental charge payable in connection therewith. 
 Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Security is registered
as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary. 

  
 3 

 All terms used in this Security which are defined in the Indenture shall have the meanings
assigned to them in the Indenture. 

  
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