Document:

EFFICACY DEMONSTRATION
LABORATORY AGREEMENT

THIS EFFICACY DEMONSTRATION
LABORATORY AGREEMENT (this “Agreement”) is entered into this 10th day of June, 2020, to memorialize and document
an arrangement, understanding, and agreement by and between BAKHU HOLDINGS, CORP., a Nevada corporation (“Bakhu”),
and THE OZ CORPORATION, a California corporation (“OZ”), that commenced on and as of May 1, 2020 (the “Effective
Date”), on the following:

Premises

A.                
Bakhu acquired a right and license to conduct certain activities respecting a specified territory for intellectual property
and know-how, including patent rights, generally relating to producing and manufacturing cannabis sativa and cannabinoids, all
pursuant to, as provided in, and in accordance with that certain Patent and Technology License Agreement dated December 20, 2018,
as amended and restated in that certain Amended and Restated Patent and Technology License Agreement dated December 31, 2019, and
as further amended or supplemented from time to time hereafter (collectively, the “License”), by and between
Cell Science Holding Ltd., a Cypress corporation (“Cell Science”), which appears therein as Licensor, and Bakhu,
which appears therein as Licensee. Under the License, substantial financial benefits accrue to Cell Science and its stockholders,
including OZ, on successful completion of the Efficacy Demonstration. Capitalized terms used but not defined in this Agreement
will have the meanings ascribed them in the License.

B.                 
Pursuant to the License, Bakhu is required to complete and pay the costs of an “Efficacy Demonstration”
of the propriety science underlying the licensed technology as specified in the License.

C.                 
At the time the License was completed, Bakhu did not have the established financial, technical, or management resources
to initiate the preparation work for the Efficacy Demonstration. Accordingly, OZ initiated these efforts at its own cost and risk.
Accordingly, on March 8, 2019, OZ, Cell Science, and VO Leasing Corp., a California corporation (“VOLC”), entered
into that certain Research and Develop Agreement respecting the Efficacy Demonstration (the “R&D Agreement”).
VOLC is lessee of a facility located at 15614 Oxnard Avenue, Sherman Oaks, California (the “Facility”) that
is suitable for a laboratory to conduct research and development of cannabis cell growing and cell growth technology relating to
the Efficacy Demonstration. VOLC has represented that it has all required and applicable licenses, regulatory authorizations, and
consents from all governmental authorities required to conduct the proposed activities involving cannabis and cannabis components,
products, or derivatives at the Facility.

D.                
The work to be undertaken by or at the direction of OZ under the R&D Agreement is intended to meet the requirements
under the License to complete an Efficacy Demonstration, which is necessary to trigger certain events, rights, and obligations
of the respective parties under the License, all to the substantial benefit of Bakhu.

E.                 
VOLC is a privately held California corporation with principal offices in California that is positioned to undertake the
Efficacy Demonstration, at the direction of OZ, which involves handling cannabis and cannabis components, products, or derivatives.

F.                 
OZ owns a majority of the voting control of Bakhu and is a principal stockholder of Cell Science. As such, OZ will directly
and indirectly realize substantial financial benefits on successful completion of the Efficacy Demonstration and wanted to realize
the benefits of being directly involved in the testing in order to minimize reliance on third parties. Therefore, OZ was willing
to manage and advance funds initially to undertake the Efficacy Demonstration and had cash and access to cash and other liquid
resources to enable it to immediately commence work leading toward the Efficacy Demonstration.

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G.                
Bakhu is a Nevada corporation with a class of equity securities registered under Section 12(g) of the Securities Exchange
Act of 1934 (the “Exchange Act”) and, as such, wants to avoid handling cannabis and cannabis components, products,
or derivatives. Nevertheless, Bakhu realizes the benefits resulting from successful completion of the Efficacy Demonstration in
order to implement Bakhu’s business goal of sublicensing to third parties the technology with which they can produce cannabis
and cannabis components, products, or derivatives.

H.                
Bakhu has substantially strengthened its management and financial resources and is now better positioned to assume financial
and management responsibility for the Efficacy Demonstration, commencing as of the Effective Date. Under the foregoing circumstances,
Bakhu desires to engage OZ to continue to be directly responsible for completing the Efficacy Demonstration required by the R&D
Agreement on the terms and conditions set forth below.

I.                   
Each of the parties and entities identified above has received, and had the opportunity to review, all of the agreements
identified above.

Agreement

NOW, THEREFORE,
upon these premises, which are incorporated herein by this reference, and for and in consideration of the mutual promises and covenants
set forth herein and other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the parties
hereto agree as follows:

1.                  
Laboratory Testing. From and after the Effective Date, OZ will continue, with diligence and dispatch, commercially
reasonable steps to establish the necessary laboratory Facility and related support to prepare for and complete the Efficacy Demonstration
as required under the R&D Agreement, including the purchase and installation of equipment, the engagement of consultants, the
purchase of supplies and materials, the establishment of operating protocols and procedures, and the acquisition of all permits
and authorizations, and in cooperation with VOLC, the engagement of employees for VOLC for the R&D Agreement activities, the
satisfaction of all regulatory, safety, reporting, and similar requirements, and all other steps necessary to complete an Efficacy
Demonstration as required by the License.

2.                  
Collaboration and Laboratory Access. OZ will, at all times until completion of the Efficacy Demonstration, collaborate
and cooperate with Bakhu to assure its full participation in and familiarity with OZ’s day-by-day efforts under this Agreement,
including providing qualified representatives of Bakhu, at its own expense, access to the test Facility during OZ’s actual
hours of operation, provided that a duly authorized representative of OZ is present. Bakhu’s representatives will
comply with all of OZ’s safety and operating protocols and requirements and bear all risks of its personnel in the Facility.

3.                  
Cost Advances; Accounting; Auditing. OZ will be solely responsible for paying and otherwise discharging all financial
and other obligations for work toward the Efficacy Demonstration prior to the Effective Date. Commencing on the Effective Date,
OZ will advance, on Bakhu’s behalf, all costs and expenses necessary and appropriate to fulfill its obligations hereunder
to complete the Efficacy Demonstration. Periodically, but in any event within 20 days after the end of each calendar quarter until
work under this Agreement is terminated, OZ will provide Bakhu with an accounting setting forth in reasonable detail the costs
and expenses incurred by OZ under this Agreement, accompanied by supporting purchase orders, invoices, and similar original entry
records, which will be in sufficient detail to meet standards applicable to Bakhu’s preparation of audited financial statements.
At Bakhu’s reasonable request, OZ will supplement this accounting and supporting documents. From time to time, on not less
than 20 days’ prior notice to OZ, Bakhu will have the right during OZ’s regular business hours, to review and examine
OZ’s books and records respecting the accounting maintained under this Agreement and to seek adjustment of such accounting
to assure the accrual of costs and expenses in accordance with this Agreement.

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4.                  
Repayment of OZ Costs of Testing. Bakhu will repay all costs incurred by OZ after the Effective Date in performing
the Efficacy Demonstration in accordance with this Agreement on 180 days’ demand, which may be given at any time after successful
completion or abandonment of the effort to complete the Efficacy Demonstration. Until paid, these costs will bear simple interest
at 6% per year commencing on the last day of the month in which such costs were incurred and properly billed as provided herein.
Payment will be in cash, unless OZ elects to accept shares of common stock of Bakhu valued at a price equivalent to 80% of the
30 trading-day trailing volume weighted average trading closing price for Bakhu stock on the principal trading market for its shares.

5.                  
Reports. Within 20 days after the end of each calendar quarter and on attaining any significant individual or group
of related test results, OZ will deliver a written report in reasonable technical and commercial detail summarizing laboratory
results during the period or upon such event. These reports will be accurate and complete in all material respects. Such reports
will be treated as confidential for purposes of this Agreement but will serve as the basis for public disclosures by Bakhu in accordance
with its responsibilities under the Exchange Act and any securities exchange on which its securities may be listed.

6.                  
Works for Hire. All work based on, derived from, or related to the licensed technology and intellectual property
and all modifications, improvements, derivations, or extensions thereof that are created by OZ or VOLC, in any form and expression,
will be and are considered “works for hire.” As such, Bakhu will be considered the exclusive owner of all proprietary
rights, including federal copyrights, in and to all modifications, improvements, derivations, or extensions of the intellectual
property covered by the License. For purposes hereof, the term “work for hire” has the meaning defined in the United
States Copyright Act, Section 101 of Title 17 of the United States Code. Bakhu will have exclusive rights in and to all modifications,
improvements, derivations, or extensions of the intellectual property that are available to the author or owner of a United States
copyright and any other intellectual property rights. To the extent that any modifications, improvements, derivations, or extensions
of the intellectual property that are created by OZ or VOLC are not considered as works for hire, each of OZ and VOLC hereby assigns,
transfers, and sets over unto Bakhu all rights, title, and interest in and to all such modifications, improvements, derivations,
or extensions.

7.                  
Confidentiality.

(a)               
The data and information, particularly including results of laboratory work relating to the Efficacy Demonstration and the
costs and expenses incurred in connection therewith, will be deemed “Confidential Material” under this Agreement.

(b)               
OZ will keep the Confidential Material strictly confidential and will not use the Confidential Material for any purpose
other than to fully and faithfully perform its obligations under this Agreement. OZ will not disclose, or permit agents or agent
or representatives to disclose, any Confidential Material, except: (i) if required by law, regulation, and legal and regulatory
process, but only in accordance with this section; and (ii) to its agents or representatives to the extent necessary to permit
such persons to assist OZ in discharging its obligations hereunder; provided, that OZ will require each such agent or representative
to be bound by the terms of this Agreement to the same extent as if he or she were a party hereto. OZ will be responsible for any
breach of this Agreement by any of its agents or representatives, it being understood that this responsibility will be in addition
to and not by way of limitation of any right and remedy Bakhu may have against the agent or agent or representative for any breach).

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(c)               
Notwithstanding subsection (b) above, if OZ is required by law, regulation, and legal and regulatory process or requested
by a regulatory or self-regulatory authority (collectively, “Law”) to disclose all or any portion of the Confidential
Material, OZ will, to the extent permitted by Law, promptly notify Bakhu of such requirement or request so that Bakhu may seek
(at its sole expense) a protective order or other appropriate remedy. If, in the absence of a protective order or other appropriate
remedy or the receipt of a waiver hereunder, OZ is nonetheless, based on the advice of its counsel, compelled by Law to disclose
all or part of the Confidential Material, then OZ may disclose (without any liability hereunder) only that portion of the Confidential
Material that, based on the advice of its counsel, OZ is required to disclose. Notwithstanding anything herein to the contrary,
OZ may disclose (without any liability hereunder) Confidential Material in connection with any routine inspection, investigation,
examination, or inquiry (not specifically targeting Bakhu) by a regulatory or self-regulatory authority having jurisdiction over
OZ without providing notice to Bakhu or taking any other action hereunder.

(d)               
All Confidential Material is and remains the property of Bakhu, and no right or license is granted to the OZ respecting
any Confidential Material. Within 60 days after the expiration of this Agreement, OZ will promptly, and in any event no later than
five days after the request, deliver all Confidential Material (including all copies, extracts, and other reproductions) to Bakhu
or destroy such Confidential Material (including any Confidential Material held electronically) and certify in writing to Bakhu
that all Confidential Material (including any Confidential Material held electronically) has been destroyed. Notwithstanding the
return or destruction of Confidential Material, OZ will continue to be bound by its confidentiality and other obligations hereunder.

(e)               
The parties agree that monetary damages would not be a sufficient remedy for any breach of this Agreement by OZ and that
in addition to all other remedies, Bakhu may be entitled to seek specific performance and injunctive or other equitable relief
as a remedy for any such breach.

8.                  
Insurance. For so long as this Agreement (or any subsequent agreement that provides for the use of the Facility)
is in place, OZ will obtain and maintain at its own cost and expense, from a qualified insurance company, real and personal property
insurance, with a minimum coverage at least equivalent to that set forth on the Certificate of Insurance attached hereto as Appendix
A and incorporated herein by reference. Within 10 days after the execution of this Agreement, OZ will instruct the insurer
to name “Bakhu Holdings, Corp. and its subsidiaries and affiliates” as additional insureds and to identify the coverage
as primary over any and all other applicable coverages. The insurance policy must provide for 30 days’ prior written notice
to Bakhu from the insurer, by registered or certified mail, return receipt requested, in the event of any modification, cancellation,
or termination. Upon renewal or Bakhu’s request, OZ will provide to Bakhu insurance certificates to evidence continuous required
coverage.

9.                  
Term. The term of this Agreement will continue for a period of 180 days after the completion of the Efficacy Demonstration.

10.              
Governing Law; Venue. This Agreement is being executed and delivered, and is intended to be performed, in the state
of California, and to the extent permitted by law, the execution, validity, construction, and performance of this Agreement will
be construed and enforced in accordance with the laws of the state of California without giving effect to conflict of law principles.
This Agreement will be deemed made and entered into in Los Angeles County, State of California, and venue for any Proceeding (as
defined below), in connection with this Agreement will be in Los Angeles County, California.

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11.              
Waiver of Jury Trial. The parties hereto hereby voluntarily and irrevocably waive trial by jury in any Proceeding
brought in connection with this Agreement, any of the related agreements and documents, and any of the transactions contemplated
hereby or thereby. For purposes of this Agreement, “Proceeding” includes any threatened, pending, or completed
action, suit, arbitration, alternate dispute resolution mechanism, investigation, inquiry, administrative hearing, and any other
actual, threatened, or completed proceeding, whether brought by or in the right of any party to this Agreement or otherwise and
whether civil, criminal, administrative, or investigative, in which a party to this Agreement was, is, or will be involved as a
party or otherwise.

12.              
Merger; Integration. This Agreement sets forth the entire agreement regarding the matters set forth herein and supersedes
all prior negotiations, understandings, and agreements. No provision of this Agreement may be modified, waived, and changed except
by a writing signed by the parties hereto.

13.              
Notices. Any notice, demand, request, or other communication permitted or required under this Agreement will be in
writing and will be deemed to have been given as of the date so delivered, if personally delivered; as of the date so sent, if
sent by electronic mail and receipt is acknowledged by the recipient; one day after the date so sent, if delivered by overnight
courier service; or three days after the date so mailed, if mailed by certified mail, return receipt requested, addressed as follows:

If to OZ, to:

The Oz Corporation

Attn: JR Munoz,
President

One World Trade
Center, Suite 130

Long Beach, CA
90831

E-mail: tkemmitt@yahoo.com

 

If to Bakhu
to:

Bakhu Holdings,
Corp.

Attn: Thomas E.
Emmitt, President

One World Trade
Center, Suite 130

Long Beach, CA
90831

E-mail: jrmun@msn.com

 

Notwithstanding the
foregoing, service of legal process or other similar communications will not be given by electronic mail and will not be deemed
duly given under this Agreement if delivered by such means. Each party, by notice duly given in accordance herewith, may specify
a different address for the giving of any notice hereunder.

14.              
No Assignment. Neither this Agreement nor any of the rights and obligations hereunder may be assigned by any party
without the prior written consent of the nonassigning party. Any purported assignment without such consent will be void and unenforceable.

15.              
Counterpart Execution. This Agreement may be executed in one or more counterparts, each of which will be deemed an
original, and all of which together will constitute a single agreement. Counterpart signatures of this Agreement that are manually
signed and delivered by facsimile transmission, by a uniquely marked computer-generated signature, and by other electronic methods,
will be deemed to constitute signed original counterparts hereof and will bind the parties signing and delivering in such manner
and will be the same as the delivery of an original.

*** Signature Page
Follows ***

    	 	5	 

    	 

    

 

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

	 	 	 
	 	 	BAKHU HOLDINGS, CORP.
	 	 	
         

         

         

         

         

        

		 	By: /s/ Thomas K. Emmitt
	 	 	
        Thomas K. Emmitt

        President and Chief Executive Officer

        

 

 

 

 

	 	 	 
	 	 	THE OZ CORPORATION
	 	 	
         

         

         

         

         

         

        

		 	By: /s/ John R. Munoz
	 	 	
        By: Thomas K. Emmitt

        President and Chief Executive Officer

        

    	 	6Exhibit 4.2

EXECUTION VERSION

 

 

 

2.125% Senior Notes due 2030

 

PRINCIPAL FINANCIAL GROUP, INC.,

 

as Issuer,

 

and

 

PRINCIPAL FINANCIAL SERVICES, INC.,

 

as Guarantor

 

and

 

THE BANK OF NEW YORK MELLON TRUST COMPANY,
N.A.,

 

as Trustee

 

FOURTEENTH SUPPLEMENTAL INDENTURE

 

Dated as of June 12, 2020

 

 

 

    	 	 	 

     

    

 

TABLE OF CONTENTS

 

	 	Page
	Article I The Series of Securities	2
	 	 
	SECTION 1.1.   Establishment	2
	SECTION 1.2.   Definitions	2
	SECTION 1.3.   Payment of Principal, Premium, if any, and Interest	3
	SECTION 1.4.   Denominations	4
	SECTION 1.5.   No Sinking Fund	4
	SECTION 1.6.   Global Securities	4
	SECTION 1.7.   Transfer	5
	SECTION 1.8.   Defeasance	5
	SECTION 1.9.   Optional Redemption	5
	SECTION 1.10. Events of Default	6
	 	 
	Article II Guarantee	7
	 	 
	SECTION 2.1.   Guarantee	7
	 	 
	Article III Miscellaneous	7
	 	 
	SECTION 3.1.   Recitals by the Company	7
	SECTION 3.2.   Application of Supplemental Indenture	7
	SECTION 3.3.   Executed in Counterparts	8
	SECTION 3.4.   Governing Law; Waiver of Jury Trial	8
	 	 
	Exhibit A      Form of Global Note	 
	 	 
	Exhibit B      Form of Guarantee	 

 

    	 	i	 

     

    

 

FOURTEENTH SUPPLEMENTAL INDENTURE, dated
as of June 12, 2020, among PRINCIPAL FINANCIAL GROUP, INC., a corporation duly organized and existing under the laws of the
State of Delaware (the “Company,” as further defined in the Original Indenture hereinafter referred to), PRINCIPAL
FINANCIAL SERVICES, INC., a corporation duly organized and existing under the laws of the State of Iowa, as guarantor (the
“Guarantor,” as further defined in the Original Indenture hereinafter referred to), and THE BANK OF NEW YORK
MELLON TRUST COMPANY, N.A., a national banking association incorporated and existing under the laws of the United States of America,
as trustee (the “Trustee,” as further defined in the Original Indenture hereinafter referred to).

 

WHEREAS, the Company, the Guarantor and
the Trustee have heretofore entered into a Senior Indenture, dated as of May 21, 2009 (the “Original Indenture”);

 

WHEREAS, the Original Indenture is incorporated
herein by this reference and the Original Indenture, as supplemented by this Fourteenth Supplemental Indenture, is herein called
the “Indenture”;

 

WHEREAS, Section 301 of the Original Indenture
provides for various matters with respect to Securities issued under the Original Indenture to be established in an indenture supplemental
to the Original Indenture;

 

WHEREAS, Section 901(4) of the
Original Indenture permits the execution and delivery of a supplemental indenture without the consent of any Holders to establish
the form or terms of Securities of any series;

 

WHEREAS, the Company proposes to create
under the Indenture a new series of Securities;

 

WHEREAS, the Guarantor will fully and unconditionally
guarantee the obligations of the Company under the new series of Securities in accordance with the provisions of the Indenture;
and

 

WHEREAS, all the conditions and requirements
necessary to make this

 

Fourteenth Supplemental Indenture, when
duly executed and delivered, a valid and binding agreement in accordance with its terms and for the purposes herein expressed have
been performed and fulfilled.

 

NOW THEREFORE, for and in consideration
of the premises and the purchase of the Senior Notes (as defined herein) by the Holders thereof, it is mutually agreed, for the
equal and proportionate benefit of all Holders of the Senior Notes, as follows:

 

    	 	 	 

     

    

 

Article
I

 

The Series of Securities

 

Section
1.1.           
Establishment.

 

There is hereby established a new series
of Securities to be issued under the Indenture, to be designated as the Company’s “2.125% Senior Notes due 2030”
(the “Senior Notes”).

 

The initial limit upon the aggregate principal
amount of the Senior Notes that may be authenticated and delivered under the Indenture (except for (i) Senior Notes
authenticated and delivered upon registration or transfer of, or in exchange for or in lieu of, other Senior Notes pursuant to
Sections 304, 305, 306, 906 or 1108 of the Original Indenture, and (ii) any Senior Notes which, pursuant to Section 303
of the Original Indenture, are deemed never to have been authenticated and delivered thereunder) is $500,000,000; provided,
however, that the aggregate principal amount of the Senior Notes may be increased in the future, without the consent of
the Holders of the Senior Notes, on the same terms and conditions and with the same CUSIP and ISIN numbers as the Senior Notes,
except that the public offering price, the first interest payment date and the issue date may vary.

 

The Senior Notes shall be issued in the
form of one or more Global Securities in substantially the form set forth in Exhibit A hereto. The Depositary with respect
to the Senior Notes shall be The Depository Trust Company.

 

Section
1.2.           
Definitions.

 

The following defined terms used herein
shall, unless the context otherwise requires, have the meanings specified below. Capitalized terms used herein for which no definition
is provided herein shall have the meanings set forth in the Original Indenture.

 

“Comparable Treasury Issue”
means the United States Treasury security selected by the Independent Investment Banker as having a maturity comparable to the
remaining term of the Senior Notes to be redeemed (assuming, for this purpose, that the Senior Notes matured on the Par Call Date
(as defined below)) that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing
new issues of corporate debt securities of comparable maturity to the remaining term of such Senior Notes (assuming, for this purpose,
that the Senior Notes matured on the Par Call Date).

 

“Comparable Treasury
Price” means, with respect to any Redemption Date for the Senior Notes, the average, as determined by the Company,
of the Reference Treasury Dealer Quotations for such Redemption Date, after excluding the highest and lowest of such
Reference Treasury Dealer Quotations, or if the Company obtains fewer than five such Reference Treasury Dealer Quotations,
the average of all such quotations.

 

    	 	2	 

     

    

 

“Independent Investment Banker”
means an independent investment banking institution of national standing appointed by the Company.

 

“Interest Payment Date”
means June 15 and December 15 of each year, commencing on December 15, 2020.

 

“Par Call Date” means
March 15, 2030.

 

“Reference Treasury Dealer”
means each of (i) Credit Suisse Securities (USA) LLC, Citigroup Global Markets Inc. and Wells Fargo Securities, LLC and (ii) two
other Primary Treasury Dealers (as defined below) selected by the Company; provided that if any of the foregoing shall cease
to be a U.S. Government Securities dealer in the United States (a “Primary Treasury Dealer”), the Company will
substitute therefor another Primary Treasury Dealer.

 

“Reference Treasury Dealer Quotations”
means, with respect to the Reference Treasury Dealer and any Redemption Date, the average, as determined by the Company, 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 Company by such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third Business Day preceding
such Redemption Date.

 

“Regular Record Date”
means the June 1 or December 1 of each year (whether or not a Business Day) immediately preceding the related Interest Payment
Date.

 

“Treasury Rate” means
the rate per year equal to the semiannual equivalent yield to maturity of the Comparable Treasury Issue, calculated using a price
for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury Price for
such Redemption Date. The Treasury Rate shall be calculated on the third Business Day preceding the Redemption Date.

 

Section
1.3.           
Payment of Principal, Premium, if any, and Interest.

 

The Senior Notes will mature on June 15,
2030. The Senior Notes shall bear interest at the rate of 2.125% per annum from June 12, 2020 on the basis of a 360-day year consisting
of twelve 30-day months. Interest shall be paid semi-annually on each Interest Payment Date, commencing December 15, 2020 to the
Person in whose name the Senior Notes are registered on the Regular Record Date for such Interest Payment Date. Any such interest
that is not so punctually paid or duly provided for will forthwith cease to be payable to the Holders on such Regular Record Date
and may be paid as provided in Section 307 of the Original Indenture.

 

    	 	3	 

     

    

 

Principal of, and premium, if any, and interest
on the Senior Notes will be payable, and transfers of the Senior Notes will be registrable, at the Company’s office or agency
in the Borough of Manhattan, The City of New York, which initially shall be the Corporate Trust Office of the Trustee. Transfers
of the Senior Notes will also be registrable at any of the Company’s other offices or agencies that it may maintain for that
purpose.

 

Section
1.4.           
Denominations.

 

The Senior Notes may be issued in denominations
of $2,000 or any multiple of $1,000 in excess thereof.

 

Section
1.5.           
No Sinking Fund.

 

The Senior Notes are not entitled to the
benefit of any sinking fund.

 

Section
1.6.           
Global Securities.

 

The Senior Notes will be issued in the form
of one or more Global Securities registered in the name of the Depositary or its nominee. Except under the limited circumstances
described below, Senior Notes represented by Global Securities will not be exchangeable for, and will not otherwise be issuable
as, Senior Notes in definitive form. The Global Securities described above may not be transferred except as a whole by the Depositary
to a nominee of the Depositary, or by a nominee of the Depositary to the Depositary or another nominee of the Depositary, or by
the Depositary or any such nominee to a successor Depositary or its nominee.

 

Owners of beneficial interests in such Global
Securities will not be considered the Holders thereof for any purpose under the Indenture, and no Global Security representing
a Senior Note shall be exchangeable, except for another Global Security of like denomination and tenor to be registered in the
name of the Depositary or its nominee or to a successor Depositary or its nominee. The rights of Holders of such Global Securities
shall be exercised only through the Depositary.

 

A Global Security shall be exchangeable
for Senior Notes registered in the names of Persons other than the Depositary or its nominee only as provided by Section 305
of the Original Indenture. Any Global Security that is exchangeable pursuant to the preceding sentence shall be exchangeable for
Senior Notes registered in such names as the Depositary shall direct.

 

    	 	4	 

     

    

 

Section
1.7.           
Transfer.

 

No service charge will be made for any registration
of transfer or exchange of Senior Notes, but payment will be required of a sum sufficient to cover any tax or other governmental
charge that may be imposed in connection therewith.

 

Section
1.8.           
Defeasance.

 

The provisions of Sections 1202 and 1203
of the Original Indenture will apply to the Senior Notes.

 

Section
1.9.           
Optional Redemption.

 

The Senior Notes will be redeemable, at
the option of the Company, at any time and from time to time (the date of any such redemption, a “Redemption Date”),
in whole or in part, at a redemption price (the “Redemption Price”) equal to:

 

(a)       if
the Senior Notes are redeemed prior to the Par Call Date, the greater of (i) 100% of the principal amount of the Senior
Notes to be redeemed or (ii) an amount equal to the sum of the present values of the remaining scheduled payments of
principal and interest on the Senior Notes to be redeemed that would be due if such Senior Notes being redeemed matured on the
Par Call Date, not including any portion of the payments of interest accrued as of such Redemption Date, discounted to such Redemption
Date on a semiannual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate, plus 20 basis points,
as calculated by an Independent Investment Banker; or

 

(b)       if
the Senior Notes are redeemed on or after the Par Call Date, 100% of the principal amount of the Senior Notes to be redeemed;

 

plus, in each case, accrued and unpaid interest
on the Senior Notes to be redeemed to, but excluding, such Redemption Date.

 

If the Company has given notice as provided
in the Original Indenture and made funds available for the redemption of any Senior Notes called for redemption on the Redemption
Date referred to in that notice, those Senior Notes will cease to bear interest on that Redemption Date. Any interest accrued to
the Redemption Date will be paid as specified in such notice. The Company will give written notice of any redemption of any Senior
Notes to Holders of the Senior Notes to be redeemed at their addresses, as shown in the Security Register for the Senior Notes,
at least 15 days and not more than 60 days prior to the Redemption Date. The notice of redemption will specify, among other items,
the Redemption Date, the Redemption Price and the aggregate principal amount of the Senior Notes to be redeemed.

 

    	 	5	 

     

    

 

If the Company chooses to redeem less than
all of the Senior Notes, the particular Senior Notes to be redeemed shall be selected by the Trustee not more than 45 days prior
to the Redemption Date. The Senior Notes shall be selected by lot or, in the case of Global Securities, pursuant to the applicable
procedures of the Depositary, for the Senior Notes to be redeemed in part.

 

Section
1.10.          Events
of Default.

 

In addition to the Events of Default set
forth in Section 501 of the Original Indenture, each of the following will also constitute an “Event of Default”
for the Senior Notes:

 

		·	default for 30 days in the payment of any interest on the Senior Notes under the Guarantee (as defined herein) by the Guarantor;

 

		·	default in the payment of principal of the Senior Notes, or premium, if any, when due under the Guarantee by the Guarantor;

 

		·	default in the performance, or breach, of any covenant or warranty of the Guarantor in the Indenture or the Guarantee (other
than a covenant or warranty a default in the performance of which or the breach of which is specifically dealt with elsewhere in
this Section), and continuance of such default or breach for a period of 90 days after there has been given, by registered or certified
mail, to the Guarantor by the Trustee or to the Guarantor and the Trustee by the Holders of at least 25% in aggregate principal
amount of the Outstanding Senior Notes a written notice specifying such default or breach and requiring it to be remedied and stating
that such notice is a “Notice of Default” hereunder;

 

		·	the entry of a decree or order by a court having jurisdiction in the premises adjudging the Guarantor bankrupt or insolvent,
or approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect of the
Guarantor under any applicable U.S. Federal or State bankruptcy, insolvency, reorganization or other similar law, or appointing
a receiver, liquidator, assignee, trustee, sequestrator (or other similar official) of the Guarantor or of any substantial part
of its property or ordering the winding up or liquidation of its affairs, and the continuance of any such decree or order unstayed
and in effect for a period of 90 consecutive days; or

 

		·	the Guarantee ceases to be in full force and effect (other than in accordance with its terms) or the Guarantor denies or disaffirms
its obligations under the Guarantee.

 

    	 	6	 

     

    

 

Article
II

 

Guarantee

 

Section
2.1.           
Guarantee.

 

The Guarantor shall fully, unconditionally
and irrevocably guarantee the Senior Notes pursuant to a guarantee in substantially the form set forth in Exhibit B hereto
(the “Guarantee”).

 

Article
III

Miscellaneous

 

Section
3.1.           
Recitals by the Company.

 

The recitals in this Fourteenth Supplemental
Indenture are made by the Company and the Guarantor only and not by the Trustee, and all of the provisions contained in the Original
Indenture in respect of the rights, privileges, immunities, powers and duties of the Trustee shall be applicable in respect of
the Senior Notes and of this Fourteenth Supplemental Indenture as fully and with like effect as if set forth herein in full.

 

Section
3.2.           
Application of Supplemental Indenture.

 

Each and every term and condition contained
in this Fourteenth Supplemental Indenture that modifies, amends or supplements the terms and conditions of the Original Indenture
shall apply to the Senior Notes created hereby and not to any future series of Securities established under the Original Indenture.

 

    	 	7	 

     

    

 

Section
3.3.           
Executed in Counterparts.

 

This Fourteenth Supplemental Indenture
may be simultaneously executed in several counterparts, each of which shall be deemed to be an original, and such
counterparts shall together constitute one and the same instrument. The words “execution,” “signed,”
“signature,” and words of like import in the Indenture shall include images of manually executed signatures
transmitted by facsimile, email or other electronic format (including, without limitation, “pdf,”
“tif” or “jpg”) and other electronic signatures (including without limitation, DocuSign and AdobeSign
or any other similar platform identified by the Company and reasonably available at no undue burden or expense to the
Trustee). The use of electronic signatures and electronic records (including, without limitation, any contract or other
record created, generated, sent, communicated, received, or stored by electronic means) shall be of the same legal effect,
validity and enforceability as a manually executed signature or use of a paper-based record-keeping system to the fullest
extent permitted by applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the New
York State Electronic Signatures and Records Act and any other applicable law, including, without limitation, any state law
based on the Uniform Electronic Transactions Act or the Uniform Commercial Code. Without limitation to the foregoing, and
anything in the Indenture to the contrary notwithstanding, (a) any Officers’ Certificate, Company Order, Company
Request, Opinion of Counsel, Senior Note, certificate of authentication appearing on or attached to any Senior Note,
Guarantee, supplemental indenture or other certificate, opinion of counsel, instrument, agreement or other document delivered
pursuant to the Indenture may be executed, attested and transmitted by any of the foregoing electronic means and formats and
(b) all references in Sections 201, 203 and 303 of the Original Indenture or elsewhere in the Indenture to the execution,
attestation or authentication of any Security, or any certificate of authentication appearing on or attached to any Security,
by means of a manual or facsimile signature shall be deemed to include signatures that are made or transmitted by any of the
foregoing electronic means or formats. The Trustee shall have no duty to inquire into or investigate the authenticity or
authorization of any such electronic signature and shall be entitled to conclusively rely on any such electronic signature
without any liability with respect thereto.

 

Section
3.4.           
Governing Law; Waiver of Jury Trial.

 

THIS FOURTEENTH SUPPLEMENTAL INDENTURE AND
THE SENIOR NOTES SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

 

EACH OF THE COMPANY AND THE TRUSTEE HEREBY
IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING
ARISING OUT OF OR RELATING TO THIS FOURTEENTH SUPPLEMENTAL INDENTURE, THE SENIOR NOTES OR THE TRANSACTION CONTEMPLATED HEREBY.

 

    	 	8	 

     

    

 

IN WITNESS WHEREOF, each party hereto has
caused this Fourteenth Supplemental Indenture to be duly executed as of the day and year first above written.

 

	 	PRINCIPAL FINANCIAL GROUP, INC.

	 	 	 
	 	By:	/s/ Christopher J. Littlefield
	 	Name:	Christopher J. Littlefield
	 	Title: 	Executive Vice President, General Counsel and Secretary
	 	 	 
	 	PRINCIPAL FINANCIAL SERVICES, INC., as Guarantor
	 	 	 
	 	By:	/s/ Christopher J. Littlefield
	 	Name:	Christopher J. Littlefield
	 	Title: 	Executive Vice President, General Counsel and Secretary
	 	 	 
	 	THE BANK OF NEW YORK MELLON TRUST COMPANY,
N.A., as Trustee

	 	 	 
	 	By:	/s/ Shannon Matthews
	 	Name:	Shannon Matthews
	 	Title: 	Vice President

 

[Signature Page
to Fourteenth Supplemental Indenture]

 

    	 	 	 

     

    

 

EXHIBIT A

 

[FORM
OF GLOBAL NOTE]

 

(FACE OF SECURITY)

 

UNLESS THIS SECURITY IS PRESENTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), TO THE COMPANY OR
ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE &
CO. OR IN SUCH OTHER NAME AS 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.

 

THIS SECURITY IS A GLOBAL SECURITY WITHIN
THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF DTC OR A NOMINEE THEREOF. THIS SECURITY MAY NOT
BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE
REGISTERED, IN THE NAME OF ANY PERSON OTHER THAN DTC OR SUCH NOMINEE, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE
INDENTURE.

 

PRINCIPAL FINANCIAL GROUP, INC.

2.125% Senior Notes due 2030

 

CUSIP: 74251V AS1

 

	No. [Ÿ]          	$[Ÿ]

 

PRINCIPAL FINANCIAL GROUP, INC., a
corporation organized and existing under the laws of Delaware (hereinafter 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 [Ÿ] Million Dollars on June 15, 2030, and to pay interest thereon from June
12, 2020 or from the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually on June
15 and December 15 in each year, commencing on December 15, 2020, at the rate of 2.125% per annum, on the basis of a 360-day year
consisting of twelve 30-day months, until the principal hereof is paid or duly provided for 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 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 June 1 or December 1 (whether or not a 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 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 interest on
this Security will be made at the office or agency of the Company maintained for that purpose in The City of 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.

 

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 or electronic signature,
this Security shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

 

    	 	A-2	 

     

    

 

IN WITNESS WHEREOF, the Company has caused
this instrument to be duly executed.

 

			
 
 
	 	PRINCIPAL FINANCIAL GROUP, INC.
	 	 	           
	 	By:	 
	 	Name:	 
	 	Title:	 

 

    	 	A-3	 

     

    

 

CERTIFICATE OF AUTHENTICATION

 

This is one of the Securities referred to
in the within-mentioned Indenture.

 

			
 
 
	 	THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., as
Trustee
	 	 	 

	 	By:	 
	 		Authorized Signatory
	 	 	 
	Dated:	 	 

 

    	 	A-4	 

     

    

 

(REVERSE OF SECURITY)

 

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 a Senior Indenture, dated as of May 21, 2009, as supplemented and amended from time to time (herein called the
“Indenture”), between the Company, Principal Financial Services, Inc., as guarantor (herein called the
“Guarantor,” as such term is further defined in the Indenture), and The Bank of New York Mellon Trust Company,
N.A., as Trustee (herein called the “Trustee”, which term includes any successor trustee under the Indenture),
including by the Fourteenth Supplemental Indenture thereto dated as of June 12, 2020, among the Company, the Guarantor and the
Trustee (the “Supplemental 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 Guarantor, 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, initially limited in aggregate principal amount
to $500,000,000.

 

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

 

The Securities of this series will be redeemable,
at the option of the Company, as set forth in Section 1.9 of the Supplemental Indenture.

 

The Indenture contains provisions for satisfaction,
discharge and defeasance of the entire indebtedness on this Security, upon compliance by the Company with certain conditions set
forth therein.

 

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.

 

Upon payment of the amount of principal
so declared due and payable, of any overdue interest and of interest on any overdue principal and overdue interest at the rate
per annum applicable to the Securities of this series set forth on the face hereof (in each case to the extent that the payment
of such interest shall be legally enforceable), all of the Company’s obligations in respect of the payment of the principal
of and interest, if any, on the Securities of this series shall terminate.

 

    	 	A-5	 

     

    

 

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 Holders of the Securities of such series shall be
conclusive and binding upon such Holders and upon all future Holders of Securities of such series 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 such Securities.

 

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 premium, if any) 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 registrable 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 premium,
if any) 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, 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 $2,000 and in 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 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 may require payment of a sum sufficient
to cover any tax or other governmental charge payable in connection therewith. 

 

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.

 

The Guarantor shall fully, unconditionally
and irrevocably guarantee, on an unsecured senior basis, the obligations of the Company under this Security, subject to the terms,
conditions and limitations provided in the Indenture and the Guarantee, dated as of June 12, 2020, from the Guarantor to the Trustee,
relating to this Security.

 

THIS SECURITY SHALL BE GOVERNED BY AND CONSTRUED
IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

 

EACH OF THE COMPANY AND THE TRUSTEE HEREBY
IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING
ARISING OUT OF OR RELATING TO THE INDENTURE, THIS SECURITY OR THE TRANSACTION CONTEMPLATED HEREBY.

 

    	 	A-6	 

     

    

 

EXHIBIT

 

[FORM
OF GUARANTEE]

 

 

 

2.125% Senior Notes due 2030

 

GUARANTEE

 

from

 

PRINCIPAL FINANCIAL SERVICES, INC.,
as Guarantor

 

to

 

THE BANK OF NEW YORK MELLON TRUST COMPANY,
N.A., as Trustee

 

Dated as of June 12, 2020

 

 

 

    	 	B-1	 

     

    

 

GUARANTEE

 

This Guarantee (this “Guarantee”)
is made and entered into as of June 12, 2020 from PRINCIPAL FINANCIAL SERVICES, INC., a corporation duly organized and existing
under the laws of the State of Iowa, as guarantor (herein called the “Guarantor,” which term includes any successor
hereunder), to THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., a national banking association incorporated and existing under
the laws of the United States of America, as trustee (the “Trustee,” as further defined in the Indenture hereinafter
referred to). Defined terms used herein without definition shall have the meanings given to them in the Senior Indenture, dated
as of May 21, 2009, among Principal Financial Group, Inc., a Delaware corporation (the “Company,”
as further defined in the Indenture hereinafter referred to), the Guarantor and the Trustee, as supplemented by the Fourteenth
Supplemental Indenture, dated as of June 12, 2020, among the Company, the Guarantor and the Trustee with respect to the Senior
Notes as defined below (the “Indenture”).

 

RECITALS

 

The Guarantor is a wholly-owned subsidiary
of the Company and has duly authorized the execution and delivery of this Guarantee to provide for the guarantee by the Guarantor
for the benefit of the Holders of the Company’s 2.125% Senior Notes due 2030 (the “Senior Notes”) issued
pursuant to the Indenture.

 

For and in consideration of the premises
and the purchase of the Senior Notes by the Holders thereof, it is mutually agreed, for the equal and proportionate benefit of
all Holders of the Senior Notes, as follows:

 

Article
I

Representations and Warranties of Guarantor

 

Section
1.1.           
Guarantor Representations and Warranties.

 

The Guarantor does hereby represent
and warrant that it is a corporation duly incorporated and in good standing under the laws of the State of Iowa, has the
power to enter into and perform this Guarantee and to own its corporate property and assets, has duly authorized the
execution and delivery of this Guarantee by proper corporate action and neither this Guarantee, the authorization, execution,
delivery and performance hereof, the performance of the agreements herein contained nor the consummation of the transactions
herein contemplated will violate in any material respect any provision of law, any order of any court or agency of government
or any agreement, indenture or other instrument to which the Guarantor is a party or by which it or its property is bound, or
in any material respect be in conflict with or result in a breach of or constitute a default under any indenture, agreement
or other instrument or any provision of its certificate of incorporation, bylaws or any requirement of law. This Guarantee
constitutes the legal, valid and binding obligation of the Guarantor enforceable against the Guarantor in accordance with its
terms, except as the enforceability hereof may be limited by applicable bankruptcy, insolvency, reorganization, moratorium or
similar laws affecting the rights of creditors generally and by general equitable principles.

 

    	 	B-2	 

     

    

 

EXHIBIT

 

[FORM
OF GUARANTEE]

 

Article
II

Guarantee of Obligations

 

Section
2.1.           
Obligations Guaranteed.

 

Subject to the provisions of this Article
II, the Guarantor hereby fully, unconditionally and irrevocably guarantees (a) to each Holder of a Senior Note authenticated
and delivered by the Trustee or Authenticating Agent, (i) the full and prompt payment of the principal of, and premium,
if any, and interest on, and any Redemption Price with respect to, such Senior Note, when, where and as the same shall become due
and payable, whether at the stated maturity thereof, by acceleration, call for redemption or otherwise in accordance with the terms
of such Senior Note and the Indenture and (ii) the full and prompt payment of interest on the overdue principal and
interest, if any, on such Senior Note, at the rate specified in such Senior Note and to the extent lawful and (b) to
the Trustee the full and prompt payment upon written demand therefor of all amounts due to it in accordance with the terms of the
Indenture (collectively the “Guaranteed Obligation”). If for any reason the Company shall fail punctually to
pay any such Guaranteed Obligation, the Guarantor hereby agrees to cause any such Guaranteed Obligation to be made punctually when,
where and as the same shall become due and payable, whether at the stated maturity thereof, by acceleration, call for redemption
or otherwise. All payments by the Guarantor hereunder shall be paid in lawful money of the United States of America.
This Guarantee is unsecured and ranks equally in right of payment with all of the Guarantor’s existing and future
senior indebtedness.

 

Section
2.2.           
Obligations Unconditional.

 

The obligations of the Guarantor under this
Guarantee shall be absolute, unconditional and irrevocable and shall constitute a continuing guarantee of payment and not of collectability.
Such obligations shall remain in full force and effect until this Guarantee shall terminate in accordance with the provisions of
Section 5.1 hereof, and, to the maximum extent permitted by applicable law, such obligations shall not be affected, modified, released
or impaired by any state of facts or the happening from time to time of any event, including, without limitation, any of the following,
whether or not with notice to, or the consent of, the Guarantor:

 

(a)              
the waiver, compromise, settlement, release or termination of any or all of the obligations, covenants or agreements of
the Company contained in the Senior Notes or the Indenture, or of the payment, performance or observance thereof;

 

(b)              
the failure to give notice to the Guarantor of the occurrence of any default or an Event of Default under the terms and
provisions of the Senior Notes or the Indenture;

 

    	 	B-3	 

     

    

 

EXHIBIT

 

[FORM
OF GUARANTEE]

 

(c)              
 the assignment or purported assignment of any of the obligations, covenants and agreements contained in this Guarantee;

 

(d)              
the extension of the time for payment of any principal of, premium, if any, or interest on, or any Redemption Price with
respect to, the Senior Notes or of the time for performance of any obligations, covenants or agreements under or arising out of
the Senior Notes or the Indenture or the extension or the renewal of any thereof;

 

(e)              
the modification or amendment (whether material or otherwise) of any obligation, covenant or agreement set forth in the
Senior Notes or the Indenture;

 

(f)               
the taking or the omission to take any of the actions referred to in this Guarantee or in the Indenture;

 

(g)              
any failure, omission or delay on the part of, or the inability of, the Trustee or the Holders of the Senior Notes to enforce,
assert or exercise any right, power or remedy conferred on the Trustee, such Holders or any other person in this Guarantee or in
the Indenture for any reason;

 

(h)              
the voluntary or involuntary liquidation, dissolution, merger, consolidation, sale or other disposition of all or substantially
all the assets, marshaling of assets and liabilities, receivership, insolvency, bankruptcy, assignment for the benefit of creditors,
reorganization, arrangement, composition with creditors or readjustment of, or other similar proceedings affecting the Company
or any or all of its assets, or any allegation or contest of the validity of the Senior Notes or the Indenture or the disaffirmance
of the Senior Notes or the Indenture in any such proceeding; it being specifically understood, consented and agreed to that this
Guarantee shall remain and continue in full force and effect and shall be enforceable against the Guarantor to the same extent
and with the same force and effect as if such proceedings had not been instituted, and it is the intent and purpose of this Guarantee
that the Guarantor shall and does hereby waive, to the maximum extent permitted by applicable law, all rights and benefits which
might accrue to the Guarantor by reason of any such proceedings;

 

(i)               
any event or action that would, in the absence of this clause, result in the release or discharge by operation of law of
the Guarantor from the performance or observance of any obligation, covenant or agreement contained in this Guarantee;

 

(j)               
the default or failure of the Guarantor fully to perform any of its obligations set forth in this Guarantee;

 

(k)              
the release, substitution or replacement of any security pledged for the benefit of the Holders of the Senior Notes under
the Indenture;

 

(l)               
the disposition by the Company of any or all of its interest in any capital stock of the Guarantor, or any change, restructuring
or termination of the corporate structure, ownership, corporate existence or any rights or franchises of the Guarantor;

 

    	 	B-4	 

     

    

 

EXHIBIT

 

[FORM
OF GUARANTEE]

 

(m)             
 any other circumstances which might otherwise constitute a legal or equitable discharge or defense of a surety or a guarantor;
or

 

(n)              
any other occurrence whatsoever, whether similar or dissimilar to the foregoing.

 

Section
2.3.           
No Waiver or Set-Off.

 

The Guarantor agrees that, to the maximum
extent permitted by law, (a) no act of commission or omission of any kind or at any time on the part of the Trustee
or any Holder of the Senior Notes, or their successors and assigns, in respect of any matter whatsoever shall in any way impair
the rights of the Trustee or such Holders to enforce any right, power or benefit under this Guarantee, and (b) no set-off,
counterclaim, reduction, or diminution of any obligation, or any defense of any kind or nature (other than performance), which
the Guarantor or the Company has or may have against the Trustee or such Holders or any assignee or successor thereof shall be
available hereunder to the Guarantor.

 

Section
2.4.           
Waiver of Notice; Expenses.

 

The Guarantor hereby expressly waives notice
from the Trustee or the Holders of the Senior Notes of their acceptance and reliance on this Guarantee. The Guarantor further waives,
to the maximum extent permitted by law, any right that it may have (a) to require the Trustee or the Holders of the
Senior Notes to take action or otherwise proceed against the Company, (b) to require the Trustee or the Holders of
the Senior Notes to proceed against or exhaust any security pledged for the benefit of the Holders of the Senior Notes under the
Indenture or (c) to require the Trustee or the Holders of the Senior Notes otherwise to enforce, assert or exercise
any other right, power or remedy that may be available to the Trustee or such Holders. The Guarantor agrees to pay all costs, expenses
and fees, including all reasonable attorneys’ fees and expenses, that may be incurred by the Trustee in enforcing or attempting
to enforce this Guarantee or protecting the rights of the Trustee or the Holders of the Senior Notes following any default on the
part of the Guarantor hereunder, whether the same shall be enforced by suit or otherwise.

 

Section
2.5.           
Subrogation of Guarantor; Subordination.

 

Notwithstanding any payment or payments
made by the Guarantor, the Guarantor agrees that it will not enforce, by reason of subrogation, contribution, indemnity or otherwise,
any rights the Trustee or the Holders of the Senior Notes may have against the Company until all of the Guaranteed Obligations
shall have been finally, indefeasibly and unconditionally paid in full. Any claim of the Guarantor against the Company arising
from payments made by the Guarantor by reason of this Guarantee shall be in all respects subordinated to the final, indefeasible,
unconditional, full and complete payment or discharge of all of the Guaranteed Obligations guaranteed hereby.

 

    	 	B-5	 

     

    

 

EXHIBIT

 

[FORM
OF GUARANTEE]

 

Section
2.6.          
Reinstatement.

 

This Guarantee shall continue to be
effective, or be automatically reinstated, as the case may be, if at any time payment, or any part thereof, made by or on
behalf of the Company or the Guarantor in respect of any of the Senior Notes is rescinded or must otherwise be restored or
returned by the Trustee or any Holder of such Senior Notes for any reason whatsoever, whether upon the insolvency,
bankruptcy, dissolution, liquidation or reorganization of the Company, or upon or as a result of the appointment of a
receiver, intervenor or conservator of, or trustee or similar officer for the Company or any substantial part of its
properties, or otherwise, all as though such payment had not been made.

 

Section
2.7.          
Rights of Holders.

 

The Guarantor expressly acknowledges that
the Trustee has the right to enforce this Guarantee on behalf of the Holders of the Senior Notes in accordance with and subject
to the provisions of the Indenture.

 

Article
III

Covenants of the Guarantor

 

Section
3.1.          
Consolidation, Merger Conveyance, Transfer or Lease.

 

(a)         
Subject to Section 3.1(c), the Guarantor shall not consolidate with or merge with or into any other Person or convey, transfer
or lease its assets substantially as an entirety to any Person, and the Guarantor shall not permit any Person to consolidate with
or merge with or into the Guarantor, unless:

 

(1)              
the Guarantor or the Company is the surviving corporation in any merger or consolidation; or

 

(2)              
if the Guarantor conveys, transfers or leases its assets substantially as an entirety to any Person, the Person to which
such conveyance, transfer or lease is made is a corporation, partnership, trust or limited liability company organized and validly
existing under the laws of the United States of America, any State thereof or the District of Columbia and shall expressly assume,
by a supplemental agreement hereto, executed and delivered to the Trustee, all of the obligations of the Guarantor under the Indenture
and this Guarantee; and

 

(3)              
immediately after giving effect to the consolidation, merger, conveyance, transfer or lease, no Event of Default, and no
event which, after notice or lapse of time or both, would become an Event of Default, shall have happened and be continuing; and

 

(4)              
the Guarantor has delivered to the Trustee an Officers’ Certificate and an Opinion of Counsel, each stating that such
consolidation, merger, conveyance, transfer or lease and, if a supplemental agreement is required in connection with such transaction,
such supplemental agreement comply with this Section 3.1 and that all conditions precedent herein provided for relating to such
transaction have been complied with.

 

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EXHIBIT

 

[FORM
OF GUARANTEE]

 

(b)         
 Subject to Section 3.1(c), any indebtedness which becomes an obligation of the Guarantor or any of its Subsidiaries as
a result of any such transaction shall be treated as having been incurred by the Guarantor or such Subsidiary at the time of such
transaction.

 

(c)         
The provisions of Section 3.1(a) and (b) shall not be applicable to:

 

(1)              
the direct or indirect conveyance, transfer or lease of all or any portion of the stock, assets or liabilities of any of
the Guarantor’s wholly owned Subsidiaries to the Guarantor or to the Company or to other wholly owned Subsidiaries of the
Guarantor; or

 

(2)              
any recapitalization transaction, highly leveraged transaction or change of control of the Guarantor unless such transaction
or change of control is structured to include a merger or consolidation by the Guarantor or the conveyance, transfer or lease of
the Guarantor’s assets substantially as an entirety.

 

(d)         
Upon any consolidation of the Guarantor with, or merger of the Guarantor into, the Company, this Guarantee shall terminate
on the effective date of such consolidation or merger. Upon any conveyance, transfer or lease of the assets of the Guarantor substantially
as an entirety in accordance with this Section 3.1, the successor Person to which such conveyance, transfer or lease is made shall
succeed to, and may exercise every right and power of, the Guarantor under this Guarantee with the same effect as if such successor
Person had been named as the Guarantor herein; provided that the Guarantor shall not be relieved of its obligations and
covenants under this Guarantee.

 

In case of any such conveyance, transfer
or lease, such changes in phraseology and form may be made in this Guarantee thereafter to be issued as may be appropriate.

 

Section
3.2.          
Reports by the Guarantor.

 

During the term hereof, the Guarantor covenants:

 

(a)          to
file with the Trustee, within 30 days after the Guarantor is required to file the same with the Commission, copies of the
annual reports and of the information, documents and other reports (or copies of such portions of any of the foregoing as the
Commission may from time to time by rules and regulations prescribe) which the Guarantor may be required to file with
the Commission pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934, as amended; or,
if the Guarantor is not required to file information, documents or reports pursuant to either of such sections, then to file
with the Trustee and the Commission, in accordance with rules and regulations prescribed from time to time by the
Commission pursuant to Section 314(a) of the Trust Indenture Act, such of the supplementary and periodic
information, documents and reports which may be required pursuant to Section 13 of the Securities Exchange Act of 1934,
as amended, in respect of a security listed and registered on a national securities exchange as may be prescribed from time
to time in such rules and regulations. All reports, information and documents described in this Section 3.2(a) and
filed with the Commission pursuant to its Electronic Data Gathering, Analysis and Retrieval (EDGAR) system or any successor
system shall be deemed to be filed with the Trustee;

 

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EXHIBIT

 

[FORM
OF GUARANTEE]

 

(b)          
to file with the Trustee and the Commission, in accordance with the rules and regulations prescribed from time to time
by the Commission pursuant to Section 314(a) of the Trust Indenture Act, such additional information, documents and reports
with respect to compliance by the Guarantor with the conditions and covenants provided for in this Guarantee and the Indenture,
as may be required from time to time by such rules and regulations;

 

(c)          
to transmit to all Holders of the Senior Notes within 30 days after the filing thereof with the Trustee, in the manner and
to the extent provided in Section 313(c) of the Trust Indenture Act, such summaries of any information, documents and
reports required to be filed by the Guarantor pursuant to subsections (a) and (b) of this Section 3.2, as may be required
by rules and regulations prescribed from time to time by the Commission pursuant to Section 314(a) of the Trust
Indenture Act; and

 

(d)          
to deliver to the Trustee, within 120 days after the end of each fiscal year of the Guarantor, a brief certificate from
the principal executive officer, principal financial officer, or principal accounting officer as to his or her knowledge of the
Guarantor’s compliance with all conditions and covenants under this Guarantee. For purposes of this Section 3.2, such compliance
shall be determined without regard to any period of grace or requirement of notice provided under this Guarantee.

 

Delivery of such reports, information and
documents to the Trustee is for informational purposes only and the Trustee’s receipt of such shall not constitute constructive
notice of any information contained therein or determinable from information contained therein, including the Company’s compliance
with any of its covenants hereunder (as to which the Trustee is entitled to rely exclusively on Officers’ Certificates).

 

Article
IV

Notices

 

Section
4.1.           
Notices.

 

All notices, certificates or other communications
to the Guarantor hereunder shall be sufficient for every purpose hereunder if in writing and mailed, first-class postage prepaid,
to the Guarantor addressed to it at Principal Financial Services, Inc. 711 High Street, Des Moines, Iowa 50392, Attention:
General Counsel, or at any other address previously furnished in writing to the Trustee by the Guarantor.

 

    	 	B-8	 

     

    

 

EXHIBIT

 

[FORM
OF GUARANTEE]

 

Article
V

 

Miscellaneous

 

Section
5.1.           
Effective Date; Termination.

 

The obligations of the Guarantor hereunder
shall arise absolutely and unconditionally upon the date of the initial delivery of and authentication of the Senior Notes. Subject
to Section 2.6, this Guarantee shall terminate on such date as the Indenture is discharged and satisfied.

 

Section
5.2.           
Evidence of Compliance with Conditions Precedent.

 

The Guarantor shall provide the Trustee
with such evidence of compliance with such conditions precedent, if any, provided for in this Guarantee that relate to the matters
set forth in Section 314(c) of the Trust Indenture Act. Any certificate or opinion required to be given by an officer
pursuant to Section 314(c)(1) may be given in the form of an Officers’ Certificate.

 

Section
5.3.           
Remedies Not Exclusive.

 

No remedy herein conferred upon or reserved
to the Trustee or Holders of the Senior Notes is intended to be exclusive of any other available remedy or remedies, but, to the
maximum extent permitted by law, each and every such remedy shall be cumulative and shall be in addition to every other remedy
given under this Guarantee or now or hereafter existing at law or in equity. No delay or omission to exercise any right or power
accruing upon any default, omission or failure of performance hereunder shall impair any such right or power or shall be construed
to be a waiver thereof, but any such right or power may be exercised from time to time and as often as may be deemed expedient.
In order to entitle the Trustee and Holders of the Senior Notes to exercise any remedy reserved to any of them in this Guarantee,
to the maximum extent permitted by applicable law, it shall not be necessary to give any notice. In the event any provision contained
in this Guarantee should be breached, and thereafter duly waived, such waiver shall be limited to the particular breach so waived
and shall not be deemed to waive any other breach hereunder. To the maximum extent permitted by applicable law, no waiver, amendment,
release or modification of this Guarantee shall be established by conduct, custom or course of dealing, but solely by an instrument
in writing duly executed by the parties to this Guarantee and consistent with the terms of the Indenture.

 

Section
5.4.           
Limitation of Guarantor’s Liability.

 

Any term or provision of this Guarantee
notwithstanding, the Guarantee shall not exceed the maximum amount that can be guaranteed by the Guarantor without rendering the
Guarantee voidable under applicable law relating to fraudulent conveyance or fraudulent transfer or similar laws affecting the
rights of creditors generally.

 

    	 	B-9	 

     

    

 

EXHIBIT

 

[FORM
OF GUARANTEE]

 

Section
5.5.           
Entire Agreement; Counterparts.

 

This Guarantee constitutes the entire agreement,
and supersedes all prior agreements and understandings, both written and oral, between the parties with respect to the subject
matter hereof and may be executed simultaneously in several counterparts, each of which shall be deemed an original, and all of
which together shall constitute one and the same instrument. The words “execution,” “signed,” “signature,”
and words of like import in this Guarantee shall include images of manually executed signatures transmitted by facsimile, email
or other electronic format (including, without limitation, “pdf,” “tif” or “jpg”) and other
electronic signatures (including without limitation, DocuSign and AdobeSign or any other similar platform identified by the Guarantor
and reasonably available at no undue burden or expense to the Trustee). The use of electronic signatures and electronic records
(including, without limitation, any contract or other record created, generated, sent, communicated, received, or stored by electronic
means) shall be of the same legal effect, validity and enforceability as a manually executed signature or use of a paper-based
record-keeping system to the fullest extent permitted by applicable law, including the Federal Electronic Signatures in Global
and National Commerce Act, the New York State Electronic Signatures and Records Act and any other applicable law, including, without
limitation, any state law based on the Uniform Electronic Transactions Act or the Uniform Commercial Code. The Trustee shall have
no duty to inquire into or investigate the authenticity or authorization of any such electronic signature and shall be entitled
to conclusively rely on any such electronic signature without any liability with respect thereto.

 

Section
5.6.           
Severability.

 

To the maximum extent permitted by applicable
law, the invalidity or unenforceability of any one or more phrases, sentences, clauses or sections contained in this Guarantee
shall not affect the validity or enforceability of the remaining portions of this Guarantee, or any part thereof.

 

Section
5.7.           
Governing Law.

 

THIS GUARANTEE SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK. This Guarantee is subject to the Trust Indenture Act and if any
provision hereof limits, qualifies or conflicts with a provision of the Trust Indenture Act that is required by the Trust Indenture
Act to be a part of and govern this Guarantee, the latter provision shall control. If any provision of this Guarantee modifies
or excludes any provision of the Trust Indenture Act that may be so modified or excluded, the latter provision shall be deemed
to apply to this Guarantee as so modified, or to be excluded, as the case may be, whether or not such provision of this Guarantee
refers expressly to such provision of the Trust Indenture Act.

 

The Guarantor shall be an “obligor”
with respect to the Senior Notes as such term is defined in and solely for the purposes of the Trust Indenture Act and shall comply
with those provisions of the Indenture compliance with which is required by an “obligor” under the Trust Indenture
Act.

 

Section
5.8.           
Amendment; Modification.

 

This Guarantee may be amended or modified
pursuant to the terms of the Indenture.

 

    	 	B-10	 

     

    

 

IN WITNESS WHEREOF, the Guarantor has caused
this instrument to be duly executed.

 

			
 
 
	 	PRINCIPAL FINANCIAL SERVICES, INC.
	 	 	 

	 	By:	 
	 	Name:	 Christopher J. Littlefield
	 	Title: 	Executive Vice President, General Counsel and Secretary

 

    	 	B-11

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