Document:

EX-4.01

 Exhibit 4.01 
 This Note is a Global Security within the meaning of the Indenture hereinafter referred to and is registered in the name of the Depository named below or a nominee of the Depository. This Note is not
exchangeable for Notes registered in the name of a Person other than the Depository or its nominee except in the limited circumstances described herein and in the Indenture, and no transfer of this Note (other than a transfer of this Note as a whole
by the Depository to a nominee of the Depository or by a nominee of the Depository to the Depository or another nominee of the Depository) may be registered except in the limited circumstances described herein. 

Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation (the
“Depository”), to the Company 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 the Depository (and any payment is made to Cede & Co. or to such other entity as is requested by an authorized representative of the Depository), 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. 
 CITIGROUP INC.

 1.750% Notes due May 1, 2018 
  

			
	REGISTERED	  	REGISTERED        

 CUSIP: 172967 GS 4           

ISIN: US172967GS42           

Common Code: 092567737           

 

			
	No. R-0001	  	$500,000,000          

 CITIGROUP INC., a Delaware corporation (the “Company”, which term includes any successor Person
under the Indenture), for value received, hereby promises to pay to Cede & Co., or registered assigns, the principal sum of $500,000,000 on May 1, 2018 and to pay interest thereon from and including May 1, 2013 or from the most
recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually, on May 1 and November 1 of each year, commencing November 1, 2013 at the rate of 1.750% 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, as provided in the Indenture, be paid to the Person in whose name this Note is registered at the close of
business on the Record Date for such interest, which shall be the Business Day immediately 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 Record Date and may either be paid to the Person in whose name this Note is registered at the close of business on a subsequent Record Date, such subsequent Record Date to be not less than five days prior to the date of
payment of such defaulted interest, notice whereof shall be given to holders of Notes of this series not less than 15 days prior to such subsequent 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 Notes of this series may be listed, and upon such notice as may be required by such exchange, all as more fully provided in the Indenture. 

Interest hereon will be calculated on the basis of a 360-day year comprised of twelve 30-day months. 

If either an Interest Payment Date or the Maturity of the Notes falls on a day that is not a Business Day, such Interest Payment Date or
Maturity will be the next succeeding Business Day. If a date for payment of interest or principal on the Notes falls on a day that is not a business day in the place of payment, such payment will be made on the next succeeding business day in such
place of payment as if made on the date the payment was due. No interest will accrue on any amounts payable for the period from and after the due date for payment of such principal or interest. 

For these purposes, “Business Day” means any day which is a day on which commercial banks settle payments and are open for
general business in The City of New York. 
 Payment of the principal of and interest on this Note will be made at the office or
agency of the Trustee maintained for that purpose in The City of New York. 
 Reference is hereby made to the further provisions
of this Note 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 or by an authenticating agent on behalf of the Trustee by manual signature, this Note shall not be entitled to any benefit
under the Indenture or be valid or obligatory for any purpose. 

  
 2 

 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed under its
corporate seal. 
 Dated: May 1, 2013 
  

			
	CITIGROUP INC.
		
	By:	 	  

	Title:	 	Deputy Treasurer

  

			
	ATTEST:
		
	By:	 	  

	Title:	 	Assistant Secretary

  
 3 

 This is one of the Notes of the series issued under the within-mentioned Indenture.

 Dated: May 1, 2013 
  

			
	THE BANK OF NEW YORK MELLON,
	as Trustee
		
	By:	 	  

		 	Name:
		 	Title:
	
	-or-
	
	 CITIBANK, N.A.,
 as
Authenticating Agent

		
	By:	 	  

		 	Name:
		 	Title:

  
 4 

 This Note is one of a duly authorized issue of Securities of the Company (the
“Notes”), issued and to be issued in one or more series under the Indenture, dated as of March 15, 1987 (as amended and supplemented to date, the “Indenture”), between the Company and The Bank of New York Mellon, formerly
known as The Bank of New York, as Trustee (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 Notes and of the terms upon which the Notes are, and are to be, authenticated and delivered. This Note is one of the series designated
on the face hereof, initially limited in aggregate principal to $1,350,000,000. 
 If an event of default (as defined in the
Indenture) with respect to Notes of this series shall occur and be continuing, the principal of the Notes of this series may be declared due and payable in the manner and with the effect provided in the Indenture. 

The Indenture contains provisions for defeasance at any time of the entire indebtedness of this Note upon compliance by the Company with
certain conditions set forth in Sections 11.03 and 11.04 thereof, which provisions apply to this Note. 
 The Indenture contains
provisions permitting the Company and the Trustee, without the consent of the holders of the Securities, to establish, among other things, the form and terms of any series of Securities issuable thereunder by one or more supplemental indentures,
and, with the consent of the holders of not less than 66 2/3% in aggregate principal amount of Securities at the time outstanding which are affected thereby, to modify the Indenture or any supplemental indenture or the rights of the holders of
Securities of such series to be affected, provided that no such modification will (i) extend the fixed maturity of any Securities, reduce the rate or extend the time of payment of interest thereon, reduce the principal amount thereof or the
premium, if any, thereon, reduce the amount of the principal of Original Issue Discount Securities payable on any date, change the currency in which Securities are payable, or impair the right to institute suit for the enforcement of any such
payment on or after the maturity thereof, without the consent of the holder of each Security so affected, or (ii) reduce the aforesaid percentage of Securities of any series the consent of the holders of which is required for any such
modification without the consent of the holders of all Securities of such series then outstanding, or (iii) modify, without the written consent of the Trustee, the rights, duties or immunities of the Trustee. 

No reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the
Company, which is absolute and unconditional, to pay the principal of and interest on this Note at the times, place and rate, and in the coin or currency, herein prescribed. 
 This Note is a Global Security registered in the name of a nominee of the Depository. This Note is exchangeable for Notes registered in the name of a person other than the Depository or its nominee only
in the limited circumstances hereinafter described. Unless and until it is exchanged in whole or in part for definitive Notes in certificated form, this Note may not be transferred except as a whole by the Depository to a nominee of the Depository
or by a nominee of the Depository to the Depository or another nominee of the Depository. 

  
 R-1

 The Notes represented by this Global Security are exchangeable for definitive Notes in
certificated form of like tenor as such Notes in denominations of $1,000 and whole multiples of $1,000 in excess thereof only if (i) the Depository notifies the Company that it is unwilling or unable to continue as Depository for the Notes or
(ii) the Depository ceases to be a clearing agency registered under the Securities Exchange Act of 1934, as amended, or (iii) the Company in its sole discretion decides to allow the Notes to be exchanged for definitive Notes in registered
form. Any Notes that are exchangeable pursuant to the preceding sentence are exchangeable for certificated Notes issuable in authorized denominations and registered in such names as the Depository shall direct. As provided in the Indenture and
subject to certain limitations therein set forth, the transfer of definitive Notes in certificated form is registrable in the register maintained by the Company in The City of New York for such purpose, upon surrender of the definitive Note for
registration of transfer at the office or agency of the registrar, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the registrar duly executed by, the holder thereof or his attorney duly
authorized in writing, and thereupon one or more new Notes 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. Subject to the
foregoing, this Note is not exchangeable, except for a Global Security or Global Securities of this issue of the same principal amount to be registered in the name of the Depository or its nominee. 

No service charge shall be made for any such registration of transfer or exchange, but the Company 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
Note 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 Note is registered as the owner hereof for all purposes, whether or not this Note be overdue, and neither
the Company, the Trustee nor any such agent shall be affected by notice to the contrary. 
 The Company will pay additional
amounts (“Additional Amounts”) to the beneficial owner of any Note that is a non-United States person in order to ensure that every net payment on such Note will not be less, due to payment of U.S. withholding tax, than the amount then due
and payable. For this purpose, a “net payment” on a Note means a payment by the Company or a paying agent, including payment of principal and interest, after deduction for any present or future tax, assessment or other governmental charge
of the United States. These Additional Amounts will constitute additional interest on the Note. 

  
 R-2

 The Company will not be required to pay Additional Amounts, however, in any of the
circumstances described in items (1) through (13) below. 
  

	 	(1)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is imposed or withheld
solely by reason of the beneficial owner: 

  

	 	(a)	having a relationship with the United States as a citizen, resident or otherwise; 

 

	 	(b)	having had such a relationship in the past or 

  

	 	(c)	being considered as having had such a relationship. 

  

	 	(2)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is imposed or withheld
solely by reason of the beneficial owner: 

  

	 	(a)	being treated as present in or engaged in a trade or business in the United States; 

 

	 	(b)	being treated as having been present in or engaged in a trade or business in the United States in the past or 

 

	 	(c)	having or having had a permanent establishment in the United States. 

  

	 	(3)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is imposed or withheld in
whole or in part by reason of the beneficial owner being or having been any of the following (as such terms are defined in the Internal Revenue Code of 1986, as amended): 

 

	 	(a)	personal holding company; 

  

	 	(b)	foreign personal holding company; 

  

	 	(c)	foreign private foundation or other foreign tax-exempt organization; 

  

	 	(d)	passive foreign investment company; 

  

	 	(e)	controlled foreign corporation or 

  

	 	(f)	corporation which has accumulated earnings to avoid United States federal income tax. 

 

	 	(4)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is imposed or withheld
solely by reason of the beneficial owner owning or having owned, actually or constructively, 10 percent or more of the total combined voting power of all classes of stock of the Company entitled to vote or by reason of the beneficial owner being a
bank that has invested in a Note as an extension of credit in the ordinary course of its trade or business. 

 For purposes of
items (1) through (4) above, “beneficial owner” means a fiduciary, settlor, beneficiary, member or shareholder of the holder if the holder is an estate, trust, partnership, limited liability company, corporation or other entity,
or a person holding a power over an estate or trust administered by a fiduciary holder. 

  
 R-3

	 	(5)	Additional Amounts will not be payable to any beneficial owner of a Note that is a: 

 

	 	(a)	fiduciary; 

  

	 	(b)	partnership; 

  

	 	(c)	limited liability company or 

  

	 	(d)	other fiscally transparent entity 

or that is not the sole beneficial owner of the Note, or any portion of the Note. However, this exception to the obligation to pay
Additional Amounts will only apply to the extent that a beneficiary or settlor in relation to the fiduciary, or a beneficial owner or member of the partnership, limited liability company or other fiscally transparent entity, would not have been
entitled to the payment of an Additional Amount had the beneficiary, settlor, beneficial owner or member received directly its beneficial or distributive share of the payment. 

 

	 	(6)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is imposed or withheld
solely by reason of the failure of the beneficial owner or any other person to comply with applicable certification, identification, documentation or other information reporting requirements. This exception to the obligation to pay Additional
Amounts will only apply if compliance with such reporting requirements is required by statute or regulation of the United States or by an applicable income tax treaty to which the United States is a party as a precondition to exemption from such
tax, assessment or other governmental charge. 

  

	 	(7)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is collected or imposed by
any method other than by withholding from a payment on a Note by the Company or a paying agent. 

  

	 	(8)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is imposed or withheld by
reason of a change in law, regulation, or administrative or judicial interpretation that becomes effective more than 15 days after the payment becomes due or is duly provided for, whichever occurs later. 

 

	 	(9)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is imposed or withheld by
reason of the presentation by the beneficial owner of a Note for payment more than 30 days after the date on which such payment becomes due or is duly provided for, whichever occurs later. 

 

	 	(10)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any: 

 

	 	(a)	estate tax; 

  
 R-4

	 	(b)	inheritance tax; 

  

	 	(c)	gift tax; 

  

	 	(d)	sales tax; 

  

	 	(e)	excise tax; 

  

	 	(f)	transfer tax; 

  

	 	(g)	wealth tax; 

  

	 	(h)	personal property tax or 

  

	 	(i)	any similar tax, assessment, withholding, deduction or other governmental charge. 

 

	 	(11)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment, or other governmental charge required to be withheld by any
paying agent from a payment of principal or interest on a Note if such payment can be made without such withholding by any other paying agent. 

  

	 	(12)	Additional amounts will not be payable if a payment on a Note is reduced as a result of any tax, assessment or other governmental charge that is required to be made
pursuant to any European Union directive on the taxation of savings income or any law implementing or complying with, or introduced to conform to, any such directive. 

 

	 	(13)	Additional amounts will not be payable if a payment on a Note is reduced as a result of any withholding, deduction, tax, duty assessment or other governmental charge
that would not have been imposed but for a failure by the holder or beneficial owner of a Note (or any financial institution through which the holder or beneficial owner holds the Note or through which payment on the Note is made) to take any action
(including entering into an agreement with the Internal Revenue Service, or a governmental authority of another jurisdiction if the holder is entitled to the benefits of an intergovernmental agreement between that jurisdiction and the United States)
or to comply with any applicable certification, documentation, information or other reporting requirement or agreement concerning accounts maintained by the holder or beneficial owner (or any such financial institution), or concerning ownership of
the holder or beneficial owner, or any substantially similar requirement or agreement. 

  

	 	(14)	Additional Amounts will not be payable if a payment on a Note is reduced as a result of any combination of items (1) through (13) above.

 Except as specifically provided herein, the Company will not be required to make any payment of any tax,
assessment or other governmental charge imposed by any government or a political subdivision or taxing authority of such government. 
 As used in this Note, “United States person” means: 
  

	 	(a)	any individual who is a citizen or resident of the United States; 

  
 R-5

	 	(b)	any corporation, partnership or other entity created or organized in or under the laws of the United States; 

 

	 	(c)	any estate if the income of such estate falls within the federal income tax jurisdiction of the United States regardless of the source of such income and

  

	 	(d)	any trust if a United States court is able to exercise primary supervision over its administration and one or more United States persons have the authority to control
all of the substantial decisions of the trust. 

 Additionally, “non-United States person” means a
person who is not a United States person, and “United States” means the states of the United States of America and the District of Columbia, but excluding its territories and its possessions. 

Except as provided below, the Notes may not be redeemed prior to maturity. 

 

	 	(1)	The Company may, at its option, redeem the Notes if: 

  

	 	(a)	the Company becomes or will become obligated to pay Additional Amounts as described above; 

 

	 	(b)	the obligation to pay Additional Amounts arises as a result of any change in the laws, regulations or rulings of the United States, or an official position regarding
the application or interpretation of such laws, regulations or rulings, which change is announced or becomes effective on or after January 3, 2013 and 

 

	 	(c)	the Company determines, in its business judgment, that the obligation to pay such Additional Amounts cannot be avoided by the use of reasonable measures available to
it, other than substituting the obligor under the Notes or taking any action that would entail a material cost to the Company. 

  

	 	(2)	The Company may also redeem the Notes, at its option, if: 

  

	 	(a)	any act is taken by a taxing authority of the United States on or after January 3, 2013, whether or not such act is taken in relation to the Company or any
affiliate, that results in a substantial probability that the Company will or may be required to pay Additional Amounts as described above; 

  

	 	(b)	the Company determines, in its business judgment, that the obligation to pay such Additional Amounts cannot be avoided by the use of reasonable measures available to
it, other than substituting the obligor under the Notes or taking any action that would entail a material cost to the Company and 

  

	 	(c)	the Company receives an opinion of independent counsel to the effect that an act taken by a taxing authority of the United States results in a substantial probability
that the Company will or may be required to pay the Additional Amounts described under above, and delivers to the Trustee a certificate, signed by a duly authorized officer, stating that based on such opinion the Company is entitled to redeem the
Notes pursuant to their terms. 

  
 R-6

 Any redemption of the Notes as set forth in clauses (1) or (2) above shall be in whole, and not in
part, and will be made at a redemption price equal to 100% of the principal amount of the Notes Outstanding plus accrued interest thereon to the date of redemption. Holders shall be given not less than 30 days nor more than 60 days prior notice by
the Trustee of the date fixed for such redemption. 
 All terms used in this Note which are defined in the Indenture shall have
the meanings assigned to them in the Indenture. The Notes are governed by the laws of the State of New York. 

  
 R-7EX-10.1

 Exhibit 10.1 
 Symmetricom, Inc. 
 April 29, 2013 

Elizabeth A. Fetter 
 [address redacted]

 Dear Elizabeth: 

On behalf of the Board of Directors (the “Board”) of Symmetricom, Inc. (the “Company”), it is our pleasure to offer
you the position of Chief Executive Officer of the Company. The terms of our offer and the benefits provided by the Company are as follows: 
 1. You will report to the Board, following the date you start your employment with the Company (the “Start Date”). During your employment, you shall comply with and be bound by the
Company’s operating policies, procedures and practices from time to time in effect during your employment, and you shall devote your full business time to your duties and responsibilities to the Company. 

2. Your annual base salary will be $475,000 per year, and your base salary will be paid in accordance with the Company’s normal
payroll practices. For the 2014 fiscal year (beginning on or about July 1, 2013), you will have the opportunity to earn an annual target bonus (the “Annual Bonus”) in an amount equal to 100% of your base salary, based upon your
achievement of performance goals to be mutually determined by you and the Board or its Compensation Committee no later than September 1, 2013. You will not be eligible for a bonus for the remainder of the 2013 fiscal year (ending on or about
June 30, 2013). The exact amount of the Annual Bonus which is earned will be determined by the Board or its Compensation Committee subject to the terms of such bonus plans as the Company may adopt from time-to-time. Your cash compensation and
Annual Bonus for subsequent fiscal years will be subject to annual review by the Compensation Committee of the Board. 
 3.
Subject to the approval of the Board or its Compensation Committee, as soon as practicable following your Start Date, you will be granted an option to purchase 900,000 shares of the Company’s common stock, either (i) pursuant to the
Company’s 2006 Incentive Award Plan (the “Plan”) or (ii) outside the Plan (if so determined by the Board after consultation with its advisors), in either case at an exercise price per share equal to the fair market value of a
share of the Company’s common stock on the grant date, as determined in accordance with the Plan (the “Option”) or other applicable legal requirements. The shares subject to the Option will vest over four years, with 1/4 of the shares
vesting one year after your Start Date and the remaining shares vesting in monthly increments over the succeeding three years, subject to your continued service with the Company. The Option will be subject to the terms and conditions of the Plan (if
granted under the Plan) and except as otherwise described in this letter, the Company’s standard form of stock option agreement, which you will be required to sign as a condition of receiving the Option. 

 4. Subject to the discretion of the Board or its Compensation Committee, you shall be
eligible to receive additional equity awards, from time to time in the future, on such terms and subject to such conditions as the Board or its Compensation Committee shall determine as of the date of any such grant. 

5. You will be eligible to participate in the Company’s group welfare and retirement benefit plans, as well as the Company’s
deferred compensation plan, in accordance with the Company’s plans or policies as in effect from time to time and the rules established for individual participation in any such plan and under applicable law. You will be eligible for vacation
and sick leave in accordance with the Company’s policies in effect during the term of your employment. 
 6. Upon
termination of your employment with the Company for any reason, you will receive payment for all unpaid salary and vacation accrued to the date of your termination of employment and your benefits will be continued under the Company’s then
existing benefit plans and policies as provided under the terms of such plans and policies and as required by applicable law. Under certain circumstances, you will also be entitled to receive separation benefits as set forth below, but you will not
be entitled to any other compensation, award or damages with respect to your employment or termination; in addition, the benefits described in subsections B and C below shall be provided only to the extent that your termination of employment with
the Company constitutes a separation from service within the meaning of Section 409A of the Internal Revenue Code of 1986, as amended (the “Code”) and the regulations promulgated thereunder, including Treasury Regulation
Section 1.409A-1(h) (“Separation from Service”). A full unilateral release in favor of the Company and its directors, officers and other related persons, an agreement not to solicit employees of the Company for a period of one year
following termination, and a resignation from the board of directors of, and all offices with, the Company and each of its subsidiaries, each in the form provided by the Company, must be executed by you (or your estate or beneficiaries) and become
irrevocable within 60 days following your termination date in order to receive any separation benefits described in subsections B and C below; provided, however, you will not be required to release any right to indemnification that you may have
under applicable law, the Company’s bylaws or any indemnity agreement between you and the Company. 
 A. In
the event of your voluntary termination of employment with the Company, the termination of your employment with the Company for Cause (as defined below), or the termination of your employment with the Company due to death or disability, you will not
be entitled to any cash severance benefits or additional vesting of shares subject to the Option or any other equity-based award held by you (“Equity Awards”). 

B. In the event your employment with the Company is terminated by the Company without Cause prior to or more than twelve
months after a Change of Control (as defined below), you shall be entitled to cash severance (at the rate of your then current annual base salary) and Company payment of your COBRA insurance premiums (if you elect COBRA coverage), less applicable
deductions and withholdings and in accordance with the Company’s normal payroll practices, for twelve months following your termination; provided your right to receive COBRA insurance premiums shall terminate upon your commencement of full-time
employment or consulting with another company (which you shall promptly notify the Company of). 

  
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 C. In the event (i) there is a Change of Control (as defined below),
and (ii) your employment with the Company is terminated by the Company without Cause or you resign from the Company for Good Reason (as defined below) within twelve months thereafter, then in lieu of the separation benefits described in
paragraph B above, you shall be entitled to (x) cash severance (at the rate of your then current annual base salary) and Company payment of your COBRA insurance premiums (if you elect COBRA coverage), less applicable deductions and withholdings
and in accordance with the Company’s normal payroll practices, for twelve months following your termination, provided your right to receive COBRA insurance premiums shall terminate upon your commencement of full-time employment or consulting
with another company (which you shall promptly notify the combined company of), (y) an additional cash severance amount equal to the target Annual Bonus for the fiscal year in which the termination of employment occurs, less applicable
deductions and withholdings and which shall be paid in installments in accordance with the Company’s normal payroll practices over the twelve months following your termination, and (z) accelerated vesting of 50% of the unvested shares
subject to the Option and any other outstanding Equity Award granted to you which vests based solely on your continued employment or service, if your termination of employment occurs within one year after your Start Date; provided, however, that if
your termination of employment occurs on or after the first anniversary of your Start Date and prior to the second anniversary of your Start Date, the percentage of such unvested shares to be accelerated shall be 75%, and if your termination of
employment occurs on or after the second anniversary of your Start Date, 100% of such unvested shares shall be accelerated. 
 D. “Cause” means your (i) conviction of a felony under the laws of the United States or any state thereof or any act of fraud, embezzlement or dishonesty, (ii) breach of fiduciary
duties, (iii) material breach of this letter agreement or any other written agreement with the Company, which breach, if curable, is not cured within fifteen (15) days following your receipt of written notice from the Board of Directors
alleging such a breach and providing reasonable detail of the facts and circumstances justifying such allegation of breach, (iv) repeated failure to diligently perform duties in a reasonable manner pursuant to this letter agreement or repeated
failure to diligently follow the lawful directions of the Board, or (v) gross negligence or willful misconduct in performance of duties to the Company. 
 E. “Change of Control” means the occurrence of any of the following events, provided that such event constitutes a change in the ownership or effective control of the Company or a change in the
ownership of a substantial portion of the assets of the Company, as described in Treasury Regulation Section 1.409A-3(i)(5): 
 (i) A merger or consolidation of the Company with any other corporation, other than a merger or consolidation that would result in the voting securities of the Company outstanding immediately prior
thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity) more than 50% or more of the total voting power represented by the Company’s then outstanding voting
securities; 
 (ii) The sale or disposition by the Company of all or substantially all of the Company’s
assets; 

  
 3 

 (iii) A change in the composition of the Board, as a result of which fewer
than a majority of the directors are Incumbent Directors. “Incumbent Directors” shall mean directors who either (A) are directors of the Company as of the date hereof, or (B) are elected, or nominated for election, to the Board
with the affirmative votes of at least a majority of those directors whose election or nomination was not in connection with any transaction described in subsections (i) or (ii) or in connection with an actual or threatened proxy contest
relating to the election of directors of the Company; or 
 (iv) Any “person” (as such term is used in
Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended) becoming the “beneficial owner” (as defined in Rule 13d-3 under said Act), directly or indirectly, of securities of the Company representing 50% or more of the
total voting power represented by the Company’s then outstanding voting securities, without the approval of the Board. 
 F. “Good Reason” means your resignation due to one of the following conditions, which occurs without your consent: (i) a material diminution of your base compensation, (ii) a material
diminution in your authority, duties, or responsibilities, or (iii) the relocation of your principal place of employment to a location more than 40 miles from the present location of the Company’s executive offices. In order to resign for
Good Reason, you must provide written notice to the Company of the existence of the condition giving rise to Good Reason within 90 days of the initial existence of such condition. Upon receipt of such notice of the condition, the Company will be
provided with a period of 30 days during which it may remedy the condition. If the condition is not remedied within the period specified in the preceding sentence, you may resign as a result of such condition specified in the notice, provided that
such resignation must occur within 120 days after the initial existence of such condition. 
 7. Notwithstanding any provision
herein to the contrary, if you are deemed by the Company at the time of your Separation from Service to be a “specified employee” for purposes of Section 409A(a)(2)(B)(i) of the Code, to the extent delayed commencement of any portion
of the termination benefits to which you are entitled hereunder is required in order to avoid a prohibited distribution under Section 409A(a)(2)(B)(i) of the Code, such portion of your termination benefits shall not be provided to you prior to
the earlier of (a) the expiration of the six-month period measured from the date of your Separation from Service with the Company or (b) the date of your death. Upon the first business day following the expiration of such applicable Code
Section 409A(a)(2)(B)(i) deferral period, all payments deferred pursuant to this paragraph shall be paid in a lump sum to you, and any remaining payments due hereunder shall be paid as otherwise provided herein, with all such payments to be
subject to all required tax withholding. For purposes of Section 409A of the Code (including, without limitation, for purposes of Treasury Regulation Section 1.409A-2(b)(2)(iii)), your right to receive any installment payments payable (the
“Installment Payments”) shall be treated as a right to receive a series of separate payments and, accordingly, each Installment Payment shall at all times be considered a separate and distinct payment. In addition, to the extent that any
reimbursements payable to you hereunder may be subject to Section 409A of the Code, such amounts shall be paid to you no later than December 31 of the year following the year in which the cost was incurred, the amount of expenses
reimbursed in one year shall not affect the amount eligible for reimbursement in any subsequent year, and your right to reimbursement will not be subject to liquidation or exchange for another benefit. 

  
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 8. In the event that it shall be determined that any payment or other benefit by the Company
to you hereunder, whether paid or payable (the “Payments”), would be subject to the excise tax imposed by Section 4999 of the Code (the “Excise Tax”), then such Payments shall be payable either (a) in full, or
(b) as to such lesser amount which would result in no portion of such Payments being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal, state and local income taxes and the Excise Tax,
results in the receipt by you, on an after-tax basis, of the greatest amount of Payments, notwithstanding that all or some portion of such Payments may be subject to the Excise Tax. To the extent that any reduction of Payments is required pursuant
to this paragraph, the specific Payments that shall be reduced and the order of such reduction shall be determined by the Company in its sole discretion. Unless you and the Company otherwise agree in writing, any determination required under this
paragraph shall be made in writing by the nationally recognized firm of certified public accountants (the “Accounting Firm”) used by the Company prior to the Change of Control (or, if such Accounting Firm declines to serve, the Accounting
Firm shall be a nationally recognized firm of certified public accountants selected by the Company), whose determination shall be conclusive and binding upon you and the Company for all purposes. For purposes of making the calculations required by
this paragraph, the Accountants may make reasonable assumptions and approximations concerning applicable taxes and may rely on reasonable, good faith interpretations concerning the application of Sections 280G and 4999 of the Code. You and the
Company shall furnish to the Accountants such information and documents as the Accountants may reasonably request in order to make their determination under this paragraph. The Company shall bear all costs the Accountants may reasonably incur in
connection with any calculations contemplated by this paragraph. 
 9. As an employee of the Company you will have access to
certain Company confidential information and you may, during the course of your employment, develop certain information or inventions which will be the property of the Company. To protect the interests of the Company, you will need to sign the
Company’s standard employee confidentiality agreement as a condition of your employment. We wish to impress upon you that we do not wish you to bring with you any confidential or proprietary material of any former employer or to violate any
other obligations you may have to your former employers. 
 10. While we look forward to a long and profitable relationship,
should you decide to accept our offer, you will be an at-will employee of the Company, which means the employment relationship can be terminated by either of us for any reason at any time. Any statements or representations to the contrary (and any
statements contradicting any provision in this letter) should be regarded by you as ineffective. Further, your participation in any equity based plan or other benefit program is not to be regarded as assuring you of continuing employment for any
particular period of time. 
 11. Notwithstanding any other provision of this letter agreement, the Company may withhold from
amounts payable hereunder all federal, state, local and foreign taxes and other amounts that are required to be withheld by applicable laws or regulations. This letter agreement is binding on and may be enforced by the Company and its successors and
assigns and is binding on and may be enforced by you and your heirs and legal representatives (provided that you may not assign your duties hereunder). 

  
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 12. Any dispute, claim or controversy based on, arising out of or relating to your
employment or this letter agreement shall be settled by final and binding arbitration in Santa Clara County, California, before a single neutral arbitrator in accordance with the National Rules for the Resolution of Employment Disputes (the
“Rules”) of the American Arbitration Association (the “AAA”), and judgment on the award rendered by the arbitrator may be entered in any court having jurisdiction. Arbitration may be compelled pursuant to the California
Arbitration Act (Code of Civil Procedure §§ 1280 et seq.). If the parties are unable to agree upon an arbitrator, one shall be appointed by the AAA in accordance with its Rules. Each party shall pay the fees of its own attorneys, the
expenses of its witnesses and all other expenses connected with presenting its case; however, the parties agree that, to the extent permitted by law, the arbitrator may, in its discretion, award reasonable attorneys’ fees to the prevailing
party. Other costs of the arbitration, including the cost of any record or transcripts of the arbitration, AAA’s administrative fees, the fee of the arbitrator, and all other fees and costs, shall be borne by the Company. 

13. This letter agreement constitutes the entire understanding and agreement of the parties hereto with respect to the subject matter
hereof and supersedes all prior and contemporaneous agreements or understandings, inducements or conditions, express or implied, written or oral, between the parties with respect to such subject matter. This letter agreement may be amended or
modified only with the written consent of the parties hereto and will be governed by the laws of the State of California without reference to conflicts of law provisions. 
 14. Our offer of employment is contingent upon completion of satisfactory reference and background checks. In addition, for purposes of federal immigration law, you will be required to provide the Company
with documentary evidence of your identity and eligibility for employment in the United States. That documentation must be provided to the Company within three business days of your date of hire, or our employment relationship with you may be
terminated. 

  
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 15. This offer will remain open until April 30, 2013. If you decide to accept our
offer, and we hope you will, please sign the enclosed copy of this letter agreement in the space indicated below and return it to me. Your signature will acknowledge that you have read and understood and agreed to the terms and conditions of this
offer. Should you have anything else that you wish to discuss, please do not hesitate to call me. 
 We look forward to the
opportunity to welcome you to the Company. 
 Very truly yours, 
 SYMMETRICOM, INC. 

			
		
	 By:
	 	 /s/ James Chiddix

		 	      James Chiddix
		 	      Chairman of the Board of Directors

 Acknowledged, Accepted and Agreed 

							
				
	 /s/ Elizabeth A. Fetter
	 		  	 April 29, 2013
	  	
	Elizabeth A. Fetter	 		  	Date	  	

  
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