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Exhibit 4.3

DESCRIPTION OF THE REGISTRANT’S SECURITIES
REGISTERED PURSUANT TO SECTION 12 OF THE
SECURITIES EXCHANGE ACT OF 1934

Appian Corporation (“we,” “us” and “our”) has one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended: our Class A common stock, par value $0.0001 per share. The following summary description of our Class A common stock is not complete and is qualified in its entirety by reference to our Amended and Restated Certificate of Incorporation, our Amended and Restated Bylaws, each of which are incorporated by reference as an exhibit to the Annual Report on Form 10-K of which this Exhibit 4.3 is a part, and applicable provisions of the Delaware General Corporation Law.

Authorized Capital Stock

Our certificate of incorporation provides for two classes of common stock: Class A common stock and Class B common stock. 
Our authorized capital stock consists of 600,000,000 shares, all with a par value of $0.0001 per share, of which:

•500,000,000 shares are designated as Class A common stock; and
•100,000,000 shares are designated as Class B common stock.

Voting Rights

Holders of our Class A common stock and Class B common stock have identical rights, provided that, except as otherwise expressly provided in our certificate of incorporation or required by applicable law, on any matter that is submitted to a vote of our stockholders, holders of our Class A common stock are entitled to one vote per share of Class A common stock and holders of our Class B common stock are entitled to ten votes per share of Class B common stock. Holders of shares of Class A common stock and Class B common stock will vote together as a single class on all matters (including the election of directors) submitted to a vote of stockholders. In addition, each class of our common stock may have the right to vote separately in certain instances as listed below under “Economic Rights.”

A separate vote of our Class B common stock will also be required in order for us to, directly or indirectly, take action in the following circumstances:

•if we propose to amend, alter or repeal any provision of our certificate of incorporation or our bylaws that modifies the voting, conversion or other powers, preferences or other special rights or privileges or restrictions of the Class B common stock; or
•if we reclassify any outstanding shares of Class A common stock into shares having rights as to dividends or liquidation that are senior to the Class B common stock or the right to more than one vote for each share thereof.

Our certificate of incorporation provides the authorized number of shares of Class A common stock or Class B common stock may be increased or decreased (but not below the number of shares then outstanding) by the affirmative vote of the holders of a majority of the combined voting power of the outstanding shares of Class A common stock and Class B common stock, voting together as a single class. In addition, except as expressly permitted by the certificate of incorporation, we may not issue any shares of Class B common stock, unless that issuance is approved by the affirmative vote of the holders of a majority of the outstanding shares of Class B common stock.

We have not provided for cumulative voting for the election of directors in our certificate of incorporation.

Economic Rights

Except as otherwise expressly provided in our certificate of incorporation or required by applicable law, shares of Class A common stock and Class B common stock have the same rights and privileges and rank equally, share ratably and are identical in all respects as to all matters, including, without limitation, those described below.

Dividends. Any dividend or distribution paid or payable to the holders of shares of Class A common stock and Class B common stock shall be paid pro rata, on an equal priority, pari passu basis, unless different treatment of the shares of any such class is approved by the affirmative vote of the holders of a majority of the outstanding shares of the applicable class of common stock treated adversely, voting separately as a class; provided, however, that if a dividend or distribution is paid in the form of Class A common stock or Class B common stock (or rights to acquire shares of Class A common stock or Class B common stock), then the holders of the Class A common stock may receive Class A common stock (or rights to acquire shares of Class A common stock) and holders of Class B common stock may receive Class B common stock (or rights to acquire shares of Class B common stock).

Liquidation. In the event of our liquidation, dissolution, or winding-up, our remaining assets legally available for distribution to stockholders shall be distributed on an equal priority, pro rata basis to the holders of Class A common stock and Class B common stock unless different treatment is approved by the affirmative vote of the holders of a majority of the outstanding shares of each of the Class A common stock and Class B common stock, voting separately as a class.

Subdivisions and Combinations. If we subdivide or combine in any manner outstanding shares of Class A common stock or Class B common stock, then the outstanding shares of all common stock will be subdivided or combined in the same proportion and manner unless different treatment of the shares of such class is approved by the affirmative vote of the holders of a majority of the outstanding shares of the applicable class of common stock treated adversely, voting separately as a class.

Change of Control Transaction. The holders of Class A common stock and Class B common stock will be treated equally and identically with respect to shares of Class A common stock or Class B common stock owned by them unless different treatment is approved by the affirmative vote of the holders of a majority of the outstanding shares of each of the Class A common stock and Class B common stock, voting separately as a class, on (a) the closing of the sale, lease, exclusive license, or other disposition of all or substantially all of our assets, (b) the consummation of a merger, reorganization, consolidation, or share transfer which results in our capital stock outstanding immediately before the transaction representing less than a majority of the combined voting power of the voting securities of the company or the surviving or acquiring entity, or (c) the closing of the transfer (whether by merger, consolidation, or otherwise but excluding a bona fide equity financing), in one transaction or a series of related transactions, to a person or group of affiliated persons of securities of the company if, after closing, the transferee person or group would hold 50% or more of the outstanding voting power of the company (or the surviving or acquiring entity). However, consideration to be paid or received by a holder of common stock in connection with any such asset sale, merger, reorganization, consolidation, or share transfer under any employment, consulting, severance, or other arrangement will be disregarded for the purposes of determining whether holders of common stock are treated equally and identically.

 Anti-Takeover Provisions

Anti-Takeover Statute

We are subject to Section 203 of the Delaware General Corporation Law, which generally prohibits a publicly held Delaware corporation from engaging in any business combination with any interested stockholder for a period of three years after the date that such stockholder became an interested stockholder, with the following exceptions:

•before such date, the board of directors of the corporation approved either the business combination or the transaction that resulted in the stockholder becoming an interested stockholder;
•upon completion of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the voting stock of the corporation outstanding at the time the transaction began, excluding for purposes of determining the voting stock outstanding, but not the 

outstanding voting stock owned by the interested stockholder, those shares owned (1) by persons who are directors and also officers and (2) employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or exchange offer; or
•on or after such date, the business combination is approved by the board of directors and authorized at an annual or special meeting of the stockholders, and not by written consent, by the affirmative vote of at least 66 2⁄3% of the outstanding voting stock that is not owned by the interested stockholder.

In general, Section 203 defines a “business combination” to include the following:

•any merger or consolidation involving the corporation and the interested stockholder;
•any sale, transfer, pledge or other disposition of 10% or more of the assets of the corporation involving the interested stockholder;
•subject to certain exceptions, any transaction that results in the issuance or transfer by the corporation of any stock of the corporation to the interested stockholder;
•any transaction involving the corporation that has the effect of increasing the proportionate share of the stock or any class or series of the corporation beneficially owned by the interested stockholder; or
•the receipt by the interested stockholder of the benefit of any loans, advances, guarantees, pledges, or other financial benefits by or through the corporation.

In general, Section 203 defines an “interested stockholder” as an entity or person who, together with the person’s affiliates and associates, beneficially owns, or within three years prior to the time of determination of interested stockholder status did own, 15% or more of the outstanding voting stock of the corporation.

Anti-Takeover Effects of Certain Provisions of our Certificate of Incorporation and Bylaws

Because our stockholders do not have cumulative voting rights, stockholders holding a majority of the voting power of the Class A common stock and Class B common stock outstanding will be able to elect all of our directors. Our certificate of incorporation provides for a two-class common stock structure, which provides our founders, current stockholders, executives, and employees with significant influence over all matters requiring stockholder approval, including the election of directors and significant corporate transactions, such as a merger or other sale of our company or its assets.

Our certificate of incorporation and bylaws also provide that:

•the authorized number of directors may be changed by resolution of the board of directors or, prior to the date on which all shares of common stock convert into a single class, by resolution of the stockholders;
•vacancies and newly created directorships on the board of directors may be filled (1) by a majority vote of the directors then serving on the board, even though less than a quorum, except as otherwise required by law or determined by the board, or (2) by the stockholders;
•stockholder action may be taken at a duly called meeting of stockholders or, prior to the date on which all shares of common stock convert into a single class, by written consent;
•a special meeting of stockholders may be called by a majority of our whole board of directors, the chair of our board of directors, our chief executive officer or, prior to the date on which all shares of common stock convert into a single class, the holders of at least 10% of the total voting power of our Class B common stock; and
•stockholders seeking to present proposals before any meeting of stockholders or to nominate candidates for election as directors at a meeting of stockholders must provide timely advance notice in writing, and, subject to applicable law, specify requirements as to the form and content of a stockholder’s notice.

The combination of these provisions will make it more difficult for another party to obtain control of us by replacing our board of directors. Since our board of directors has the power to retain and discharge our officers, these provisions could also make it more difficult for another party to effect a change in management.

These provisions are intended to enhance the likelihood of continued stability in the composition of our board of directors and its policies and to discourage coercive takeover practices and inadequate takeover bids. These provisions are also designed to reduce our vulnerability to hostile takeovers and to discourage certain tactics that may be used in proxy fights. However, such provisions could have the effect of discouraging others from making tender offers for our shares and may have the effect of delaying changes in our control or management. As a consequence, these provisions may also inhibit fluctuations in the market price of our stock that could result from actual or rumored takeover attempts. We believe the benefits of these provisions, including increased protection of our potential ability to negotiate with the proponent of an unfriendly or unsolicited proposal to acquire or restructure our company, outweigh the disadvantages of discouraging takeover proposals, because negotiation of takeover proposals could result in an improvement of their terms.

Other Rights and Preferences

Our shares of Class A common stock are not redeemable and have no preemptive rights.

Listing

Our outstanding shares of Class A common stock are listed on the Nasdaq Global Market under the trading symbol “APPN.”Document

Exhibit 10.21

THIRD AMENDMENT TO DEED OF LEASE

This THIRD amendment TO DEED OF lease (this “Amendment”) is entered into as of the 30th day of November, 2021 (the “Effective Date”) by and between TAMARES 7950 OWNER LLC, a Delaware limited liability company, having an office c/o Tamares Real Estate Holdings, Inc., 1500 Broadway, 24th Floor, New York, New York 10036 (“Landlord”), and APPIAN CORPORATION, a Delaware corporation, having an office at Valo Park, 7950 Jones Branch Drive, Tysons, Virginia 22102 (“Tenant”).

W I T N E S S E T H:

A.        Landlord and Tenant entered into that certain Deed of Lease dated as of April 17, 2018 (the “Original Lease”), pursuant to which Tenant leased from Landlord certain premises in the Building located at 7950 Jones Branch Drive, McLean, Virginia, as more particularly described in the Lease; 

B.        On and as of December 23rd, 2019, the parties executed that certain First Amendment to Deed of Lease (the “First Amendment”) pursuant to which Tenant surrendered the Storage Space. 

C.        On and as of January 1, 2020, the parties executed that certain Second Amendment to Deed of Lease (the “Second Amendment”) pursuant to which, among other things, the Fourth Floor North Premises was added to the Premises and the Lease was modified to provide for certain terms and conditions in respect thereof as more particularly set forth in the Second Amendment. The Original Lease as amended by the First Amendment and the Second Amendment is referred to herein collectively as the “Lease”.

D.        Landlord and Tenant acknowledged that due to a mutual mistake of fact the Lease set forth an incorrect deadline for the date by which Tenant was required to exercise the Fixed Date Expansion Option for the Seventh Floor Expansion Space. The parties acknowledged that the correct date is December 1, 2021 (the “Exercise Deadline”). 

E.         Tenant desires to exercise the Fixed Date Expansion Options for the Seventh Floor Expansion Space and the Ninth Floor Expansion Space and Landlord and Tenant are entering into this Amendment to memorialize such exercise and provide for the terms applicable thereto as the same have been established by the parties in accordance with the terms of the Lease. 

NOW, THEREFORE, Landlord and Tenant agree as follows:

1.DEFINITIONS. 

a.All capitalized terms used and not defined herein shall have the respective meanings set forth in the Lease.

1.EXERCISE OF OPTIONS. Tenant hereby irrevocably exercises the Fixed Date Expansion Options for the Seventh Floor Expansion Space and for the Ninth Floor Expansion Space. No Expansion Option Exercise Notice has been delivered or is being required for the valid exercise of such Fixed Date Expansion Options notwithstanding anything set forth in the Lease to the contrary. 

1.AMENDMENTS.   
a.As of the Effective Date, the Lease is hereby amended and modified as follows: 

i.Seventh Floor Expansion Space. 
1.The Seventh (7th) Floor of the North Tower containing approximately 32,883 rentable square feet as more particularly described on Exhibit A (the “Seventh Floor Expansion Space”) shall be added to the Premises as of September 1, 2022, such date being the Fixed Date Expansion Space Commencement Date for the Seventh Floor Expansion Space. Possession of the Seventh Floor Expansion Space shall automatically be deemed to have been delivered to Tenant as of September 1, 2022 without any further act being required, it being the intent of the parties that Octagon, Inc., the current tenant occupying the Seventh 

Floor Expansion Space, is and shall remain in possession of the Seventh Floor Expansion Space in accordance with the terms of the Octagon Sublease (defined below). Tenant agrees to accept possession of the Seventh Floor Expansion Space on the Fixed Date Expansion Space Commencement Date as set forth above in its then “AS IS” condition notwithstanding anything to the contrary set forth in the Lease. 
2.The following table is inserted into the Summary as new Section 9.4 thereof: 									
	9.4	Base Rent for the Seventh Floor Expansion Space:	The following table sets forth the annual Base Rent and Monthly Base Rent for the Seventh Floor Expansion Space.

															
	Period Start	Period End	Annualized Base Rent	Monthly Base Rent	$/RSF/
Year
	09/01/22	08/31/23	$1,182,472.68	$98,539.39	$35.96
	09/01/23	08/31/24	$1,217,946.86	$101,495.57	$37.04
	09/01/24	08/31/25	$1,254,485.27	$104,540.44	$38.15
	09/01/25	08/31/26	$1,292,119.82	$107,676.65	$39.29
	09/01/26	08/31/27	$1,330,883.42	$110,906.95	$40.47
	09/01/27	08/31/28	$1,370,809.92	$114,234.16	$41.69
	09/01/28	08/31/29	$1,411,934.22	$117,661.18	$42.94
	09/01/29	08/31/30	$1,454,292.25	$121,191.02	$44.23
	09/01/30	08/31/31	$1,497,921.01	$124,826.75	$45.55
	09/01/31	10/31/31	$1,542,858.64	$128,571.55	$46.92

** Subject to abatement through September 30, 2023
1.Seventh Floor Expansion Space Rent Commencement Date. The Fixed Date Expansion Space Abated Rent Period for the Seventh Floor Expansion Space shall end on September 30, 2023. The Fixed Date Expansion Space Rent Commencement Date for the Seventh Floor Expansion Space is October 1, 2023.   

1.Seventh Floor Expansion Space Tenant Improvement Allowance. Notwithstanding anything set forth in the Lease to the contrary, (x) the Fixed Date Expansion Space Tenant Improvement Allowance for the Seventh Floor Expansion Space is Two Million Eight Hundred Sixty Thousand Eight Hundred Twenty‐One and No/100 Dollars ($2,860,821.00) (the “Seventh Floor TIA”), and (y) Tenant shall have until the Seventh Floor TIA Deadline (defined below) to utilize such Tenant Improvement Allowance in accordance with the terms of the Lease and the Work Letter. Notwithstanding anything herein to the contrary, Tenant shall have the right to utilize up to seventy five percent (75%) of the Seventh Floor TIA on any portion of the Premises provided that fifty percent (50%) of the amount not used on the Seventh Floor Expansion Space shall be used by Tenant to improve the fourth (4th) floor outdoor patio. Any undisbursed portion of the Seventh Floor TIA remaining on September 1, 2026, or if Octagon exercises the Option to Extend (as defined in and pursuant to the terms of the Octagon Sublease), any undisbursed portion thereof remaining on September 1, 2027, (as applicable, the “Seventh Floor TIA Deadline”) shall be retained by Landlord, time being of the essence. Notwithstanding anything in this Section 3(a)(i)(4) to the contrary, if Tenant is unable to utilize the entire Seventh Floor TIA by the Seventh Floor TIA Deadline despite reasonable efforts, Tenant may request by written notice to Landlord to be delivered by Tenant not sooner than sixty (60) days before the Seventh Floor TIA Deadline and not later than the Seventh Floor TIA Deadline that Landlord apply all or a portion of the undisbursed Seventh Floor TIA to reimburse Tenant for so called “hard costs” of construction incurred by Tenant for Alterations to any portion of the Premises not previously reimbursed by Landlord in accordance with the Lease. Any such notice shall be 

accompanied by reasonable supporting documentation. Provided that Tenant timely delivers such notice, Landlord shall fund to Tenant in accordance with the Lease from the undisbursed portion of the Seventh Floor TIA, ninety percent (90%) of the “hard costs” requested by Tenant for reimbursement in accordance herewith, not in any case to exceed the then remaining Seventh Floor TIA. 
2.Tenant’s Share. From and after the Fixed Date Expansion Space Rent Commencement Date for the Seventh Floor Expansion Premises, Tenant’s Share shall be thirty eight and fifty nine hundredths percent (38.59%) computed as follows: ((i) 176,222 rentable square feet within the Original Premises plus (ii) 28,805 within the Fifth Floor Must-Take Space plus (iii) 34,158 rentable square feet within the Fourth Floor North Premises, plus (iv) 32,883 rentable square feet within the Seventh Floor Expansion Premises)/705,092 rentable square feet within the Building).  
3.Octagon Sublease. Simultaneously with Landlord and Tenant’s execution and delivery of this Amendment, Landlord, Tenant and Octagon are entering into that certain Landlord’s Consent to Sublease dated of even date herewith pursuant to which, among other things, Landlord is granting Landlord’s consent to a proposed sublease between Tenant and Octagon, Inc. for the Seventh Floor Expansion Space (the “Octagon Sublease”).  Landlord acknowledges and agrees that Sections 18.8 and 18.9 of the Lease shall not apply to the Octagon Sublease.
ii.Ninth Floor Expansion Space. 
1.The Ninth (9th) Floor of the North Tower containing approximately 25,925 rentable square feet and as more particularly described on Exhibit B (the “Ninth Floor Expansion Space”) shall be added to the Premises as of May 1, 2023, such date being the Fixed Date Expansion Space Commencement Date for the Ninth Floor Expansion Space. Landlord shall deliver to Tenant, and Tenant shall accept from Landlord, possession of the Ninth Floor Expansion Space on such date, provided that the Ninth Floor Expansion Space is in the condition required under Section 1.16.8 of the Lease. 
2.The following table is inserted into the Summary as new Section 9.5 thereof:									
	9.5	Base Rent for the Ninth Floor Expansion Space:	The following table sets forth the annual Base Rent and Monthly Base Rent for the Ninth Floor Expansion Space.

															
	Period Start	Period End	Annualized Base Rent	Monthly
Base Rent	$/RSF/Year
	08/15/23	08/31/24	$960,230.89**	$80,019.24**	$37.04
	09/01/24	08/31/25	$989,037.82	$82,419.82	$38.14
	09/01/25	08/31/26	$1,018,708.95	$84,892.41	$39.29
	09/01/26	08/31/27	$1,049,270.22	$87,439.18	$40.47
	09/01/27	08/31/28	$1,080,748.33	$90,062.36	$41.69
	09/01/28	08/31/29	$1,113,170.78	$92,764.23	$42.94
	09/01/29	08/31/30	$1,146,565.90	$95,547.16	$44.23
	09/01/30	08/31/31	$1,180,962.88	$98,413.57	$45.55
	09/1/31	10/31/31	$1,216,391.76	$101,365.98	$46.92

** Subject to abatement through March 31, 2024
1.Ninth Floor Expansion Space Rent Commencement Date. The Fixed Date Expansion Space Abated Rent Period for the Ninth Floor Expansion Space shall end on March 31, 2024. The Fixed Date Expansion Space Rent Commencement Date for the Ninth Floor Expansion Space is April 1, 2024.   
2.Ninth Floor Expansion Space Tenant Improvement Allowance. The Tenant Improvement Allowance for the Ninth Floor Expansion Space is One Million Six Hundred Eighty-Five 

Thousand One Hundred Twenty-Five Dollars ($1,685,125.00). Tenant shall utilize such Tenant Improvement Allowance in accordance with the terms of the Lease and the Work Letter. 
3.Tenant’s Share. From and after the Fixed Date Expansion Space Rent Commencement Date for the Seventh Floor Expansion Premises, Tenant’s Share shall be forty two and twenty six hundredths percent (42.26%) computed as follows: ((i) 176,222 rentable square feet within the Original Premises plus (ii) 28,805 within the Fifth Floor Must-Take Space plus (iii) 34,158 rentable square feet within the Fourth Floor North Premises, plus (iv) 32,883 rentable square feet within the Seventh Floor Expansion Premises, plus (v) 25,925 rentable square feet within the Ninth Floor Expansion Premises)/705,092 rentable square feet within the Building).  
iii.Supplemental Security Deposit for Seventh Floor Expansion Space and Ninth Floor Expansion Space. On or prior to thirty (30) days following the date hereof, Tenant shall deliver to Landlord a supplemental Letter of Credit in the amount of $2,686,349.44 (or a replacement Letter of Credit in the Security Deposit Amount), all in accordance with and as provided for in Article 2 of the Lease. As of the Effective Date, the Security Deposit Amount as defined in Section 2.1 of the Lease shall mean $13,612,320.24.
1.The following definitions in Section 2.2.2 of the Lease shall be amended as follows:
A.The “First Reduced LC Amount” shall mean $10,209,240.18

A.The “Second Reduced LC Amount” shall mean $6,806,160.12.

A.The “Third Reduced LC Amount” shall mean $3,403,080.06.

A.The “Fourth Reduced LC Amount” shall mean $1,134,360.02.
a.Reference to “Two Million Three Hundred Forty-One Thousand Four Hundred Eight and 34/100 Dollars ($2,341,408.34)” in the fourth sentence in Section 2.2.1 of the Original Lease shall be replaced with ”Three Million Four Hundred Three Thousand Eight and 06/100 Dollars ($3,403,080.06)”.
1.Intentionally Omitted.
2.Parking Rights. As of the Effective Date, Sections 11.1 and 11.2 of the Summary are deleted in their entirety. The following is inserted in their place and stead:									
	“11.1	Parking Rights:	Tenant shall receive three (3.0) parking permits (each, a “Parking Permit” per 1,000 square feet of the Premises, yielding (A) as of the Effective Date, parking permits for 718 parking spaces based on the rentable square footage of the Premises (i.e., (176,222 RSF + 28,805 RSF + 34,158 RSF / 1,000) x 3.0), of which: (i) 691 parking spaces shall be unreserved parking spaces and (ii) 27 of which parking spaces shall be exclusive parking spaces as identified by signage or paint; (B) as of the Fixed Date Expansion Space Commencement Date for the Seventh Floor Expansion Space, parking permits for 817 parking spaces based on the rentable square footage of the Premises (i.e., (176,222 RSF + 28,805 RSF + 34,158 RSF + 32,883 RSF/ 1,000) x 3.0), of which: (i) 786 parking spaces shall be unreserved parking spaces and (ii) 31 of which parking spaces shall be exclusive parking spaces as identified by signage or paint; and (C) as of the Fixed Date Expansion Space Commencement Date for the Ninth Floor Expansion Space, parking permits for 895 parking spaces based on the rentable square footage of the Premises (i.e., (176,222 RSF + 28,805 RSF + 34,158 RSF + 32,883 RSF + 25,925 RSF/ 1,000) x 3.0), of which: (i) 861 parking spaces shall be unreserved parking spaces and (ii) 34 of which parking spaces shall be exclusive parking spaces as identified by signage or paint. As the Premises are expanded, Tenant shall continue to receive parking spaces based on the same ratio as provided in this Section 11.1 of the Summary.”
	11.2	Parking Permit Fees
for Original Premises, Fifth Floor Must-Take Space, Fourth Floor North, Seventh Floor Expansion Space and Ninth Floor Expansion Space:
	Commencing on May 1, 2025, Tenant shall pay to Landlord as Additional Rent on the first (1st) day of each month occurring during the Term a fee of $86.98 per Parking Permit per month (“Parking Permit Fees”). On May 1, 2026, and annually thereafter, Parking Permit Fees shall be increased by 2.5%. The following table sets forth the annual Parking Permit Fees and monthly parking permit fees for the Original Premises, the Fifth Floor Must-Take Space, the Fourth Floor North Premises, the Seventh Floor Expansion Space and the Ninth Floor Expansion Space during the Initial Term (calculated on the basis of 895 parking permits).

															
	Period Start	

Period End	Annual Installment of Parking Permit Fees	Monthly Installment of Parking Permit Fees	$/Parking Permit/
Month
	5/1/19	4/30/25	$0	$0	$0
	5/1/25	4/30/26	$934,165.20	$77,847.10	$86.98
	5/1/26	4/30/27	$957,519.33	$79,793.28	$89.15
	5/1/27	4/30/28	$981,457.31	$81,788.11	$91.38
	5/1/28	4/30/29	$1,005,993.75	$83,832.81	$93.67
	5/1/29	4/30/30	$1,031,143.59	$85,928.63	$96.01
	5/1/30	4/30/31	$1,056,922.18	$88,076.85	$98.41
	5/1/31	10/31/31	$1,083,345.23	$90,278.77	$100.87

*All Parking shall be free of charge through April 30, 2025.  **In addition, the Parking Permit Fees for the two hundred eighty parking spaces allocated to the Fourth Floor North Premises, the Seventh Floor Expansion Space and the Ninth Floor Expansion Space shall be 

abated until October 31, 2025.  The numbers in the chart do not reflect the abated Parking Permit Fees described in the foregoing sentence.

Landlord and Tenant shall enter into an amendment to this Lease upon Tenant’s exercise of any of Tenant’s Expansion Rights to restate the above table based upon the number of Parking Permits allocated to Tenant based upon the rentable square feet of the Premises then demised to Tenant under this Lease based on three (3.0) Parking Permits per 1,000 square feet of the Premises (provided that the failure of Landlord and Tenant to enter into such amendment shall have no effect on the Parking Permit Fees payable by Tenant in accordance with the terms of this Lease).”

1.Most Favored Nations. If Landlord enters into a lease with another party (a “Favored Tenant”) for comparable premises within the Building (a “Favored Lease”) as reasonably determined by Landlord on economic terms that are materially more favorable to such party than the terms set forth herein (the “Favored Terms”), Landlord shall notify Tenant thereof whereupon Landlord and Tenant shall promptly enter into an amendment to the Lease in order to provide Tenant the Favored Terms with respect to the Seventh Floor Expansion Space and/or Ninth Floor Expansion Space, as applicable, provided, however, that Landlord shall have no obligation to provide Favored Terms to Tenant if the Favored Lease is not executed or delivered within six (6) months following the Effective Date with respect to the Seventh Floor Expansion Space, and with respect to the Ninth Floor Expansion Space within one (1) year following the Effective Date, provided, however, that if Landlord and a Favored Tenant have executed and delivered a letter of intent for a Favored Lease and are negotiating a Favored Lease at the end of the applicable period, such periods shall be extended for an additional period not to exceed sixty (60) days or sooner if such negotiations are terminated by Landlord for any reason. Time is of the essence with respect to all dates herein.  
2.Conforming Change to ROFR Rights Provision. Subclause (i) of the first sentence of Section 1.18.1 is deleted in its entirety. The following is inserted in its place and stead: 
“     (i) from and after Tenant’s delivery of a Second Delay Notice and prior to Tenant thereafter delivering to Landlord an Expansion Option Exercise Notice on any Fixed Date Expansion Space that Landlord intends to accept a written proposal to lease all or a portion of such Fixed Date Expansion Space to a third party, and (ii)...”  

a.REFERENCE TO AND EFFECT ON THE LEASE.

i.Construction. On and after the Effective Date, each reference in the Lease to “this Lease,” “hereunder,” “hereof,” “herein,” and words of like import shall mean and be a reference to the Lease as amended hereby.

i.No Waiver. The execution, delivery and effectiveness of this Amendment shall not operate as a waiver of any right, power or remedy of the Landlord or Tenant under the Lease or constitute a waiver of any provision of the Lease.

a.MISCELLANEOUS. 

i.Ratification and Confirmation of the Lease. Except as specifically modified and amended by this Amendment, all of the terms, covenants and conditions of the Lease are hereby ratified and confirmed and shall continue to be and remain in full force and effect throughout the remainder of the term thereof, and the Lease as amended hereby shall, from and after the Effective Date, be read as a single, integrated document incorporating the changes effected by this Amendment.

i.Not a Binding Offer. This Amendment shall not be binding upon or enforceable against Landlord or Tenant unless and until both parties shall have executed and unconditionally delivered a fully executed copy of this Amendment to the other party.

i.Modifications Must Be in Writing. This Amendment may not be modified, amended or terminated nor may any of its provisions be waived except by an agreement in writing signed by the parties hereto.

i.Successors and Assigns. The covenants, agreements, terms, provisions and conditions contained in this Amendment shall be binding upon and inure to the benefit of the parties hereto and their respective successors and assigns.

i.No Prior Agreements. This Amendment constitutes the entire agreement between the parties with respect to the subject matter hereof and supersedes all other prior agreements and understandings, both written and oral, between the parties with respect to the subject matter of this Amendment.

i.Counterparts and Electronic Signatures.  This Amendment may be executed in any number of counterparts, each of which shall be an original, but such counterparts together shall constitute one and the same instrument.  The parties may deliver executed counterparts of this Amendment by attachment to e-mail or by other electronic means (e.g., via DocuSign), with the same effect as having delivered original executed counterparts hereof.

i.Brokers. 

1.Tenant represents and warrants to Landlord that neither it nor its officers or agents nor anyone acting on its behalf has dealt with any real estate broker other than CBRE, Inc. (on behalf of Landlord) or Cushman & Wakefield, U.S., Inc. (on behalf of Tenant) in the negotiating or making of this Amendment.  Tenant agrees to indemnify and hold Landlord, its agents, employees, partners, directors, shareholders and independent contractors harmless from all liabilities, costs, demands, judgments, settlements, claims and losses, including reasonable attorney’s fees and costs, incurred by Landlord in conjunction with any such claim or claims of any other broker or brokers claiming to have interested Tenant in the Fourth Floor North Premises or claiming to have caused Tenant to enter into this Amendment.  

1.Landlord represents and warrants to Tenant that neither it nor its officers or agents nor anyone acting on its behalf has dealt with any real estate broker other than CBRE, Inc. (on behalf of Landlord) or Cushman & Wakefield, U.S., Inc. (on behalf of Tenant) in the negotiating or making of this Amendment.  Landlord agrees to indemnify and hold Tenant, its agents, employees, partners, directors, shareholders and independent contractors harmless from all liabilities, costs, demands, judgments, settlements, claims and losses, including reasonable attorney’s fees and costs, incurred by Tenant in conjunction with any such claim or claims of any other broker or brokers claiming to have interested Landlord in leasing the Fourth Floor North Premises to Tenant or to have caused Landlord to enter into this Amendment.  Landlord further agrees to pay the commissions accruing to each identified broker above pursuant to certain outside agreement(s).

i.Due Authorization. Each of Landlord and Tenant represents and warrants that (i) its execution and delivery of this Amendment, and its performance of its obligations hereunder, have been duly authorized, (ii) the person(s) executing this Amendment on its behalf have full authority to enter into this Amendment, and (iii) no further action is necessary for it to be obligated to fulfill its obligations under the Lease, as amended hereby.
ii.Lender Approval Contingency. The effectiveness of this Amendment is expressly made subject to Landlord obtaining Landlord’s lender’s approval. If Landlord has not obtained Landlord’s lender’s approval within ten (10) business days following the date hereof, this Amendment shall automatically terminate and shall be of no further force or effect unless the foregoing ten (10) business day period is extended by written agreement of Landlord and Tenant. The Exercise Deadline (defined in Recital D) shall automatically be extended through and including the date that is five (5) business days following the termination of this Amendment in accordance with this 5(i).  

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IN WITNESS WHEREOF, Landlord and Tenant have executed this Third Amendment as of the day and year first above written.

LANDLORD:
TAMARES 7950 OWNER LLC  
By:   /s/ Itrat Sayeed                                                            
        Name:  Itrat Sayeed         Title:    Vice President

TENANT:
APPIAN CORPORATION 

By:      /s/ Matt Calkins                                                                                             
Name:   Matt Calkins         Title:     CEO

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