Document:

EX-10.26

 Exhibit 10.26 

THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR
THE SECURITIES LAWS OF ANY STATE AND, EXCEPT AS SET FORTH IN SECTIONS 5.3 AND 5.4 BELOW, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND
SUBSTANCE SATISFACTORY TO THE ISSUER, SUCH OFFER, SALE, PLEDGE OR OTHER TRANSFER IS EXEMPT FROM SUCH REGISTRATION. 
 WARRANT TO PURCHASE
STOCK 
 Company: Fastly, Inc., a Delaware corporation 

Number of Shares: As set forth in Paragraph A below 

Type/Series of Stock: Series D Preferred Stock, $0.00002 par value per share 

Warrant Price: $1.18 per Share, subject to adjustment 

Issue Date: August 11, 2016 
 Expiration Date:
August 10, 2026     See also Section 5.1(b). 
  

	Credit Facility:	 This Warrant to Purchase Stock (“Warrant”) is issued in connection
with that certain Mezzanine Loan and Security Agreement of even date herewith between Silicon Valley Bank and the Company (as amended and/or modified and in effect from time to time, the “Mezzanine Loan Agreement”)
and that certain First Amendment, of even date herewith, to that certain Amended and Restated Loan and Security Agreement dated November 21, 2014, between Silicon Valley Bank and the Company (collectively, and as may be further amended
and/or modified and in effect from time to time, the “Senior Loan Agreement”) and the participation therein of WestRiver Mezzanine Loans, LLC pursuant to an arrangement among Silicon Valley Bank, WestRiver
Management, LLC and WestRiver Mezzanine Loans, LLC. 

 THIS WARRANT CERTIFIES THAT, for good and valuable consideration,
WESTRIVER MEZZANINE LOANS, LLC - LOAN POOL IV (together with any successor or permitted assignee or transferee of this Warrant or of any shares issued upon exercise hereof, “Holder”) is entitled to purchase up
to such number of fully paid and non-assessable shares of the above-stated Type/Series of Stock (the “Class”) of the above-named company (the
“Company”) as determined pursuant to Paragraph A below, at the above-stated Warrant Price, all as set forth above and as adjusted pursuant to Section 2 of this Warrant, subject to the provisions and upon
the terms and conditions set forth in this Warrant. 
 A. Number of Shares. This Warrant shall be exercisable for the Initial Shares,
plus the Additional Shares, if any (collectively, the “Shares”). 
 (1) Initial Shares. As used
herein, “Initial Shares” means 47,558 shares of the Class, subject to adjustment from time to time in accordance with the provisions of this Warrant. 

(2) Additional Shares. Upon the making of each Term Loan Advance (as defined in the Mezzanine Loan Agreement) to the Company, this
Warrant automatically shall become exercisable for such number of additional shares of the Class as shall equal (a) the Additional Shares Pool, multiplied by (b) a fraction, the numerator of which shall equal the amount of such Term
Loan Advance and the denominator of which shall equal $12,500,000, rounded to the nearest whole Share and subject to adjustment thereafter from time to time in accordance with the provisions of this Warrant. All shares, if any, for which this
Warrant becomes exercisable pursuant to this Paragraph A(2) are referred to herein cumulatively as the “Additional Shares.” 

  

 (3) Additional Shares Pool. As used herein, “Additional Shares
Pool” means 142,675 shares of the Class, as such number may be adjusted from time to time in accordance with the provisions of this Warrant (as if the Additional Shares Pool constituted “Shares” at all times for such
purpose). For the avoidance of doubt, in no event shall the aggregate number of Shares for which this Warrant shall be exercisable exceed 190,233 (as such number may be adjusted from time to time in accordance with the provisions of this Warrant).

 SECTION 1. EXERCISE. 

1.1 Method of Exercise. Holder may at any time and from time to time exercise this Warrant, in whole or in part, by delivering to the
Company the original of this Warrant together with a duly executed Notice of Exercise in substantially the form attached hereto as Appendix 1 and, unless Holder is exercising this Warrant pursuant to a cashless exercise set forth in Section 1.2, a
check, wire transfer of same-day funds (to an account designated by the Company), or other form of payment acceptable to the Company for the aggregate Warrant Price for the Shares being purchased. 

1.2 Cashless Exercise. On any exercise of this Warrant, in lieu of payment of the aggregate Warrant Price in the manner as specified in
Section 1.1 above, but otherwise in accordance with the requirements of Section 1.1, Holder may elect to receive Shares equal to the value of this Warrant, or portion hereof as to which this Warrant is being exercised. Thereupon, the Company shall
issue to the Holder such number of fully paid and non-assessable Shares as are computed using the following formula: 
  

					
		  	X =	  	Y(A-B)/A
			
	    where:	  		  	
			
		  	X =	  	the number of Shares to be issued to the Holder;
			
		  	Y =	  	the number of Shares with respect to which this Warrant is being exercised (inclusive of the Shares surrendered to the Company in payment of the aggregate Warrant Price);
			
		  	A=	  	the Fair Market Value (as determined pursuant to Section 1.3 below) of one Share; and
			
		  	B =	  	the Warrant Price.

 1.3 Fair Market Value. If the Company’s common stock is then traded or quoted on a
nationally recognized securities exchange, inter-dealer quotation system or over-the-counter market (a “Trading Market”) and the
Class is common stock, the fair market value of a Share shall be the closing price or last sale price of a share of common stock reported for the Business Day immediately before the date on which Holder delivers this Warrant together with its
Notice of Exercise to the Company. If the Company’s common stock is then traded in a Trading Market and the Class is a series of the Company’s convertible preferred stock, the fair market value of a Share shall be the closing price or
last sale price of a share of the Company’s common stock reported for the Business Day immediately before the date on which Holder delivers this Warrant together with its Notice of Exercise to the Company multiplied by the number of shares of
the Company’s common stock into which a Share is then convertible. If the Company’s common stock is not traded in a Trading Market, the Board of Directors of the Company shall determine the fair market value of a Share in its reasonable
good faith judgment. 

  
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 1.4 Delivery of Certificate and New Warrant. Within a reasonable time after Holder
exercises this Warrant in the manner set forth in Section 1.1 or 1.2 above, the Company shall deliver to Holder a certificate representing the Shares issued to Holder upon such exercise and, if this Warrant has not been fully exercised and has
not expired, a new warrant of like tenor representing the Shares not so acquired. 
 1.5 Replacement of Warrant. On receipt of
evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant and, in the case of loss, theft or destruction, on delivery of an indemnity agreement reasonably satisfactory in form, substance and amount
to the Company or, in the case of mutilation, on surrender of this Warrant to the Company for cancellation, the Company shall, within a reasonable time, execute and deliver to Holder, in lieu of this Warrant, a new warrant of like tenor and amount.

 1.6 Treatment of Warrant Upon Acquisition of Company. 

(a) Acquisition. For the purpose of this Warrant, “Acquisition” means any transaction or series of
related transactions involving: (i) the sale, lease, exclusive license, or other disposition of all or substantially all of the assets of the Company (ii) any merger or consolidation of the Company into or with another person or entity
(other than a merger or consolidation effected exclusively to change the Company’s domicile), or any other corporate reorganization, in which the stockholders of the Company in their capacity as such immediately prior to such merger,
consolidation or reorganization, own less than a majority of the Company’s (or the surviving or successor entity’s) outstanding voting power immediately after such merger, consolidation or reorganization (or, if such Company stockholders
beneficially own a majority of the outstanding voting power of the surviving or successor entity as of immediately after such merger, consolidation or reorganization, such surviving or successor entity is not the Company); or (iii) any sale or
other transfer by the stockholders of the Company of shares representing at least a majority of the Company’s then-total outstanding combined voting power (other than transfers for no consideration by one or more of such stockholders who are
natural persons to his or their respective family members, or to trusts established for the benefit of such family members, for estate planning purposes). 

(b) Treatment of Warrant at Acquisition. In the event of an Acquisition in which the consideration to be received by the Company’s
stockholders consists solely of cash, solely of Marketable Securities or a combination of cash and Marketable Securities (a “Cash/Public Acquisition”), and the fair market value of one Share as determined in
accordance with Section 1.3 above would be greater than the Warrant Price in effect on such date immediately prior to such Cash/Public Acquisition, and Holder has not exercised this Warrant pursuant to Section 1.1 above as to all Shares,
then this Warrant shall automatically be deemed to be Cashless Exercised pursuant to Section 1.2 above as to all Shares effective immediately prior to and contingent upon the consummation of a Cash/Public Acquisition. In connection with such
Cashless Exercise, Holder shall be deemed to have restated each of the representations and warranties in Section 4 of the Warrant as of the date thereof and the Company shall promptly notify the Holder of the number of Shares (or such other
securities) issued upon exercise. In the event of a Cash/Public Acquisition where the fair market value of one Share as determined in accordance with Section 1.3 above would be less than the Warrant Price in effect immediately prior to such
Cash/Public Acquisition, then this Warrant will expire immediately prior to the consummation of such Cash/Public Acquisition. 

  
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 (c) Upon the closing of any Acquisition other than a Cash/Public Acquisition, the acquiring,
surviving or successor entity shall assume the obligations of this Warrant, and this Warrant shall thereafter be exercisable for the same securities and/or other property as would have been paid for the Shares issuable upon exercise of the
unexercised portion of this Warrant as if such Shares were outstanding on and as of the closing of such Acquisition, subject to further adjustment from time to time in accordance with the provisions of this Warrant. 

(d) As used in this Warrant, “Marketable Securities” means securities meeting all of the following
requirements: (i) the issuer thereof is then subject to the reporting requirements of Section 13 or Section 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and is
then current in its filing of all required reports and other information under the Act and the Exchange Act; (ii) the class and series of shares or other security of the issuer that would be received by Holder in connection with the Acquisition
were Holder to exercise this Warrant on or prior to the closing thereof is then traded in a Trading Market, and (iii) following the closing of such Acquisition, Holder would not be restricted from publicly
re-selling all of the issuer’s shares and/or other securities that would be received by Holder in such Acquisition were Holder to exercise this Warrant in full on or prior to the closing of such
Acquisition, except to the extent that any such restriction (x) arises solely under federal or state securities laws, rules or regulations, and (y) does not extend beyond six (6) months from the closing of such Acquisition. 

SECTION 2. ADJUSTMENTS TO THE SHARES AND WARRANT PRICE. 

2.1 Stock Dividends, Splits, Etc. If the Company declares or pays a dividend or distribution on the outstanding shares of the
Class payable in common stock or other securities or property (other than cash), then upon exercise of this Warrant, for each Share acquired, Holder shall receive, without additional cost to Holder, the total number and kind of securities and
property which Holder would have received had Holder owned the Shares of record as of the date the dividend or distribution occurred. If the Company subdivides the outstanding shares of the Class by reclassification or otherwise into a greater
number of shares, the number of Shares purchasable hereunder shall be proportionately increased and the Warrant Price shall be proportionately decreased. If the outstanding shares of the Class are combined or consolidated, by reclassification
or otherwise, into a lesser number of shares, the Warrant Price shall be proportionately increased and the number of Shares shall be proportionately decreased. 

2.2 Reclassification, Exchange, Combinations or Substitution. Upon any event whereby all of the outstanding shares of the Class are
reclassified, exchanged, combined, substituted, or replaced for, into, with or by Company securities of a different class and/or series, then from and after the consummation of such event, this Warrant will be exercisable for the number, class and
series of Company securities that Holder would have received had the Shares been outstanding on and as of the consummation of such event, and subject to further adjustment thereafter from time to time in accordance with the provisions of this
Warrant. The provisions of this Section 2.2 shall similarly apply to successive reclassifications, exchanges, combinations, substitutions, replacements or other similar events. 

  
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 2.3 Conversion of Preferred Stock. If the Class is a class and series of the
Company’s convertible preferred stock, in the event that all outstanding shares of the Class are converted, automatically or by action of the holders thereof, into common stock pursuant to the provisions of the Company’s Certificate
of Incorporation, including, without limitation, in connection with the Company’s initial, underwritten public offering and sale of its common stock pursuant to an effective registration statement under the Act (the
“IPO”), then from and after the date on which all outstanding shares of the Class have been so converted, this Warrant shall be exercisable for such number of shares of common stock into which the Shares
would have been converted had the Shares been outstanding on the date of such conversion, and the Warrant Price shall equal the Warrant Price in effect as of immediately prior to such conversion divided by the number of shares of common stock into
which one Share would have been converted, all subject to further adjustment thereafter from time to time in accordance with the provisions of this Warrant. 

2.4 Adjustments for Diluting Issuances. It is acknowledged that the Shares for which this Warrant may be exercised have certain rights
under the Company’s Certificate of Incorporation, including conversion price adjustments for diluting issuances under certain circumstances, which rights may be amended from time to time pursuant to the provisions of the Certificate of
Incorporation. 
 2.5 No Fractional Share. No fractional Share shall be issuable upon exercise of this Warrant and the number of
Shares to be issued shall be rounded down to the nearest whole Share. If a fractional Share interest arises upon any exercise of the Warrant, the Company shall eliminate such fractional Share interest by paying Holder in cash the amount computed by
multiplying the fractional interest by (i) the fair market value (as determined in accordance with Section 1.3 above) of a full Share, less (ii) the then-effective Warrant Price. 

2.6 Notice/Certificate as to Adjustments. Upon each adjustment of the Warrant Price, Class and/or number of Shares, the Company, at
the Company’s expense, shall notify Holder in writing within a reasonable time setting forth the adjustments to the Warrant Price, Class and/or number of Shares and facts upon which such adjustment is based. The Company shall, upon written
request from Holder, furnish Holder with a certificate of its Chief Financial Officer, including computations of such adjustment and the Warrant Price, Class and number of Shares in effect upon the date of such adjustment. 

SECTION 3. REPRESENTATIONS AND COVENANTS OF THE COMPANY. 

3.1 Representations and Warranties. The Company represents and warrants to, and agrees with, the Holder as follows: 

(a) The initial Warrant Price referenced on the first page of this Warrant is not greater than the fair market value of a share of the
Company’s common stock as determined by the most recently completed valuation, approved by the Company’s Board of Directors, of the Company’s common stock for purposes of its compliance with Section 409A of the Internal Revenue
Code of 1986, as amended. 
 (b) $3.225 is not greater than the price per share at which shares of the Class were last sold and issued prior
to the Issue Date hereof in an arms-length transaction in which at least $500,000 of such shares were sold. 

  
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 (c) All Shares which may be issued upon the exercise of this Warrant, and all securities,
if any, issuable upon conversion of the Shares, shall, upon issuance, be duly authorized, validly issued, fully paid and non-assessable, and free of any liens and encumbrances except for restrictions on
transfer provided for herein or under applicable federal and state securities laws. The Company covenants that it shall at all times cause to be reserved and kept available out of its authorized and unissued capital stock such number of shares of
the Class, common stock and other securities as will be sufficient to permit the exercise in full of this Warrant and the conversion of the Shares into common stock or such other securities. 

(d) The Company’s capitalization table attached hereto as Schedule 1 is true and complete, in all material respects, as of the Issue
Date. 
 3.2 Notice of Certain Events. If the Company proposes at any time to: 

(a) declare any dividend or distribution upon the outstanding shares of the Class or common stock, whether in cash, property, stock, or
other securities and whether or not a regular cash dividend; 
 (b) offer for subscription or sale pro rata to the holders of the
outstanding shares of the Class any additional shares of any class or series of the Company’s stock (other than pursuant to contractual pre-emptive rights); 

(c) effect any reclassification, exchange, combination, substitution, reorganization or recapitalization of the outstanding shares of the
Class; 
 (d) effect an Acquisition or to liquidate, dissolve or wind up; or 

(e) effect an IPO; 
 then, in connection with
each such event, the Company shall give Holder: 
 (1) in the case of the matters referred to in (a) and (b) above, at
least seven (7) Business Days prior written notice of the earlier to occur of the effective date thereof or the date on which a record will be taken for such dividend, distribution, or subscription rights (and specifying the date on which the
holders of outstanding shares of the Class will be entitled thereto) or for determining rights to vote, if any; 
 (2)
in the case of the matters referred to in (c) and (d) above at least seven (7) Business Days prior written notice of the date when the same will take place (and specifying the date on which the holders of outstanding shares of the
Class will be entitled to exchange their shares for the securities or other property deliverable upon the occurrence of such event and such reasonable information as Holder may reasonably require regarding the treatment of this Warrant in
connection with such event giving rise to the notice); and 
 (3) with respect to the IPO, at least seven (7) Business
Days prior written notice of the date on which the Company proposes to file its registration statement in connection therewith. 
 The Company will also
provide information requested by Holder that is reasonably necessary to enable Holder to comply with Holder’s accounting or reporting requirements. 

  
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 SECTION 4. REPRESENTATIONS, WARRANTIES OF THE HOLDER. 

The Holder represents and warrants to the Company as follows: 

4.1 Purchase for Own Account. This Warrant and the securities to be acquired upon exercise of this Warrant by Holder are being acquired
for investment for Holder’s account, not as a nominee or agent, and not with a view to the public resale or distribution within the meaning of the Act. Holder also represents that it has not been formed for the specific purpose of acquiring
this Warrant or the Shares. 
 4.2 Disclosure of Information. Holder is aware of the Company’s business affairs and financial
condition and has received or has had full access to all the information it considers necessary or appropriate to make an informed investment decision with respect to the acquisition of this Warrant and its underlying securities. Holder further has
had an opportunity to ask questions and receive answers from the Company regarding the terms and conditions of the offering of this Warrant and its underlying securities and to obtain additional information (to the extent the Company possessed such
information or could acquire it without unreasonable effort or expense) necessary to verify any information furnished to Holder or to which Holder has access. 

4.3 Investment Experience. Holder understands that the purchase of this Warrant and its underlying securities involves substantial risk.
Holder has experience as an investor in securities of companies in the development stage and acknowledges that Holder can bear the economic risk of such Holder’s investment in this Warrant and its underlying securities and has such knowledge
and experience in financial or business matters that Holder is capable of evaluating the merits and risks of its investment in this Warrant and its underlying securities and/or has a preexisting personal or business relationship with the Company and
certain of its officers, directors or controlling persons of a nature and duration that enables Holder to be aware of the character, business acumen and financial circumstances of such persons. 

4.4 Accredited Investor Status. Holder is an “accredited investor” within the meaning of Regulation D promulgated under the
Act. 
 4.5 The Act. Holder understands that this Warrant and the Shares issuable upon exercise hereof have not been registered under
the Act in reliance upon a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of the Holder’s investment intent as expressed herein. Holder understands that this Warrant and the Shares issued
upon any exercise hereof must be held indefinitely unless subsequently registered under the Act and qualified under applicable state securities laws, or unless exemption from such registration and qualification are otherwise available. Holder is
aware of the provisions of Rule 144 promulgated under the Act. 
 4.6 Market Stand-off
Agreement. The Holder agrees that the Shares shall be subject to the Market Standoff provisions in Section 2.11 of the Company’s Investor Rights Agreement, as amended and in effect from time to time, and the Company may place a
restrictive legend on any certificate representing any Shares issued on exercise hereof stating that they are subject to such provisions. 

4.7 No Voting Rights. Holder, as a Holder of this Warrant, will not have any voting rights until the exercise of this Warrant. 

  
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 SECTION 5. MISCELLANEOUS. 

5.1 Term; Automatic Cashless Exercise Upon Expiration. 

(a) Term. Subject to the provisions of Section 1.6 above, this Warrant is exercisable in whole or in part at any time and from time
to time on or before 6:00 PM, Pacific time, on the Expiration Date and shall be void thereafter. 
 (b) Automatic Cashless Exercise upon
Expiration. In the event that, upon the Expiration Date, the fair market value of one Share (or other security issuable upon the exercise hereof) as determined in accordance with Section 1.3 above is greater than the Warrant Price in effect
on such date, then this Warrant shall automatically be deemed on and as of such date to be exercised pursuant to Section 1.2 above as to all Shares (or such other securities) for which it shall not previously have been exercised, and the
Company shall, within a reasonable time, deliver a certificate representing the Shares (or such other securities) issued upon such exercise to Holder. 

5.2 Legends. Each certificate evidencing Shares (and each certificate evidencing securities issued upon conversion of any Shares, if
any) shall be imprinted with a legend in substantially the following form: 
 THE SHARES EVIDENCED BY THIS CERTIFICATE HAVE
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE SECURITIES LAWS OF ANY STATE AND, EXCEPT AS SET FORTH IN THAT CERTAIN WARRANT TO PURCHASE STOCK ISSUED BY THE ISSUER TO WESTRIVER MEZZANINE
LOANS, LLC - LOAN POOL IV DATED AUGUST 11, 2016, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE
ISSUER, SUCH OFFER, SALE, PLEDGE OR OTHER TRANSFER IS EXEMPT FROM SUCH REGISTRATION. 
 5.3 Compliance with Securities Laws on
Transfer. This Warrant and the Shares issued upon exercise of this Warrant (and the securities issuable, directly or indirectly, upon conversion of the Shares, if any) may not be transferred or assigned in whole or in part except in compliance
with applicable federal and state securities laws by the transferor and the transferee (including, without limitation, the delivery of investment representation letters and legal opinions reasonably satisfactory to the Company, as reasonably
requested by the Company). The Company shall not require Holder to provide an opinion of counsel if the transfer is to an affiliate of Holder, provided that such affiliate is an “accredited investor” as defined in Regulation D promulgated
under the Act. Additionally, the Company shall also not require an opinion of counsel if there is no material question as to the availability of Rule 144 promulgated under the Act. 

5.4 Transfer Procedure. Subject to the provisions of Section 5.3 and upon providing the Company with written notice, Holder may
transfer all or part of this Warrant or the Shares issued upon exercise of this Warrant (or the securities issued upon conversion of the Shares, if any) to any transferee, provided, however, in connection with any such transfer, Holder will give the
Company notice of the portion of the Warrant and/or Shares (and/or securities issued upon conversion of the Shares, if any) being transferred with the name, address and taxpayer identification number of the transferee and Holder will surrender this
Warrant to the Company for reissuance to the transferee(s) (and Holder if applicable); 

  
 8 

 and provided further, that any subsequent transferee shall agree in writing with the Company to be bound by
all of the terms and conditions of this Warrant. Notwithstanding any contrary provision herein, at all times prior to the IPO, Holder may not, without the Company’s prior written consent, transfer this Warrant or any portion hereof, or any
Shares issued upon any exercise hereof, or any shares or other securities issued upon any conversion of any Shares issued upon any exercise hereof, to any person or entity who directly competes with the Company, except in connection with an
Acquisition of the Company by such a direct competitor. 
 5.5 Notices. All notices and other communications hereunder from the
Company to the Holder, or vice versa, shall be deemed delivered and effective (i) when given personally, (ii) on the third (3rd) Business Day after being mailed by first-class registered or
certified mail, postage prepaid, (iii) upon actual receipt if given by facsimile or electronic mail and such receipt is confirmed in writing by the recipient, or (iv) on the first Business Day following delivery to a reliable overnight courier
service, courier fee prepaid, in any case at such address as may have been furnished to the Company or Holder, as the case may be, in writing by the Company or such Holder from time to time in accordance with the provisions of this Section 5.5. All
notices to Holder shall be addressed as follows until the Company receives notice of a change of address in connection with a transfer or otherwise: 
  

	
	 WestRiver Mezzanine Loans, LLC - Loan Pool IV

c/o Chief Financial Officer

3720 Carillon Point

Kirkland, Washington 98033-7455

Attention: Trent Dawson

Telephone: (425) 952-3951

Email: tdawson@westrivermgmt.com

  

	
	 With a copy (which shall not constitute notice) to:

 
 Perkins Coie LLP

1201 Third Avenue, Suite 4800

Seattle, Washington 98101-3099

Attention: David C. Clarke

Telephone: (206) 359-8612

Email: dclarke@perkinscoie.com

 Notice to the Company shall be addressed as follows until Holder receives notice of a change in address: 

 

	
	 Fastly, Inc.

Attn: Chief Financial Officer

475 Brannan Street, Suite 250

San Francisco, CA 94107

Telephone:
 Facsimile:

Email:

  

  
 9 

 With a copy (which shall not constitute notice) to: 

Cooley LLP 
 Attn: Mark P.
Tanoury 
 3175 Hanover Street 

Palo Alto, CA 94304-1130 

Telephone: (650) 843-5016 

Facsimile: (650) 849-7400 

Email: tanourymp@cooley.com 
 5.6
Waiver. This Warrant and any term hereof may be changed, waived, discharged or terminated (either generally or in a particular instance and either retroactively or prospectively) only by an instrument in writing signed by the party against
which enforcement of such change, waiver, discharge or termination is sought. 
 5.7 Attorneys’ Fees. In the event of any dispute
between the parties concerning the terms and provisions of this Warrant, the party prevailing in such dispute shall be entitled to collect from the other party all costs incurred in such dispute, including reasonable attorneys’ fees. 

5.8 Counterparts; Facsimile/Electronic Signatures. This Warrant may be executed in counterparts, all of which together shall constitute
one and the same agreement. Any signature page delivered electronically or by facsimile shall be binding to the same extent as an original signature page with regards to any agreement subject to the terms hereof or any amendment thereto. 

5.9 Governing Law. This Warrant shall be governed by and construed in accordance with the laws of the State of California, without
giving effect to its principles regarding conflicts of law. 
 5.10 Headings. The headings in this Warrant are for purposes of
reference only and shall not limit or otherwise affect the meaning of any provision of this Warrant. 
 5.11 Business Days.
“Business Day” is any day that is not a Saturday, Sunday or a day on which banks in Washington are closed. 

[Remainder of page left blank intentionally] 

[Signature page follows] 

  
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 IN WITNESS WHEREOF, the parties have caused this Warrant to Purchase Stock to be executed by
their duly authorized representatives effective as of the Issue Date written above. 
 “COMPANY” 

FASTLY, INC. 
  

			
	By:	 	 /s/ Paul Luongo

	 Name:
	 	Paul Luongo
		 	 (Print)

	 Title:
	 	 General Counsel, Secretary

 “HOLDER” 
 WESTRIVER
MEZZANINE LOANS, LLC – LOAN POOL IV 
  

			
	By:	 	Loan Manager, LLC, its
		 	Managing Member
		
	By:	 	 /s/ Trent Dawson

		 	 Trent Dawson, Chief Financial Officer

  

  

 APPENDIX 1 
  

	
	  
 NOTICE OF EXERCISE

 1. The undersigned Holder hereby exercises its right to purchase
             shares of the Common/Series              Preferred [circle one] Stock of
                     (the “Company”) in accordance with the attached Warrant To Purchase Stock, and tenders payment of the
aggregate Warrant Price for such shares as follows: 
  

	 	[    ]	 check in the amount of $             payable to
order of the Company enclosed herewith 

  

	 	[    ]	 Wire transfer of immediately available funds to the Company’s account 

 

	 	[    ]	 Cashless Exercise pursuant to Section 1.2 of the Warrant 

 

	 	[    ]	 Other [Describe]
                                         
                                         
                                         
      

 2. Please issue a certificate or certificates representing the Shares in the name
specified below: 
  

					
	                        	  	  
	  	                                
		  	 Holder’s Name
	  	
			
		  	  
	  	
			
		  	  
	  	
		  	 (Address)
	  	

 3. By its execution below and for the benefit of the Company, Holder hereby restates each of the
representations and warranties in Section 4 of the Warrant to Purchase Stock as of the date hereof. 
  

			
	HOLDER:
	  

			
		
	 By:
	 	  

 
			
		
	 Name:
	 	  

 
			
		
	 Title:
	 	  

 
			
		
	 (Date):
	 	  

  
 Appendix 1 

 SCHEDULE 1  

Company Capitalization Table 

See attached 

  
 Schedule 1EX-10.27

 Exhibit 10.27 

THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR
THE SECURITIES LAWS OF ANY STATE AND, EXCEPT AS SET FORTH IN SECTIONS 5.3 AND 5.4 BELOW, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND
SUBSTANCE SATISFACTORY TO THE ISSUER, SUCH OFFER, SALE, PLEDGE OR OTHER TRANSFER IS EXEMPT FROM SUCH REGISTRATION. 
 WARRANT TO PURCHASE
STOCK 
 Company: Fastly, Inc., a Delaware corporation 

Number of Shares: As set forth in Paragraph A below 

Type/Series of Stock: Series F Preferred Stock, $0.00002 par value per share  

Warrant Price: $5.1123 per Share, subject to adjustment 

Issue Date: December 24, 2018 
 Expiration
Date: December 24, 2028             See also Section 5.1(b).  

	Credit Facility:	 This Warrant to Purchase Stock (“Warrant”) is issued in connection with that certain
Credit Agreement of even date herewith among the Company as Borrower, Silicon Valley Bank as Administrative Agent and Lender, and the other Lenders from time to time parties thereto (as amended and/or modified and in effect from time to time, the
“Loan Agreement”). 

 THIS WARRANT CERTIFIES THAT, for good and valuable consideration, SILICON
VALLEY BANK (together with any successor or permitted assignee or transferee of this Warrant or of any shares issued upon exercise hereof, “Holder”) is entitled to purchase up to such number of fully paid and non-assessable shares of the above-stated Type/Series of Stock (the “Class”) of the above-named company (the “Company”) as determined pursuant to Paragraph A below, at
the above-stated Warrant Price, all as set forth above and as adjusted pursuant to Section 2 of this Warrant, subject to the provisions and upon the terms and conditions set forth in this Warrant. Reference is made to Section 5.4 of this
Warrant whereby Silicon Valley Bank shall transfer this Warrant to its parent company, SVB Financial Group. 
 A. Number of Shares.
This Warrant shall be exercisable for the Initial Shares, plus the Additional Shares, if any (collectively, the “Shares”). 

(1) Initial Shares. As used herein, “Initial Shares” means 50,732 shares of the Class, subject to adjustment
from time to time in accordance with the provisions of this Warrant. 
 (2) Additional Shares. Upon the making of each Term Loan
Advance (as defined in the Loan Agreement) to the Company, this Warrant automatically shall become exercisable for such number of additional shares of the Class as shall equal (a) the Additional Shares Pool, multiplied by (b) a
fraction, the numerator of which shall equal the amount of such Term Loan Advance and the denominator of which shall equal $30,000,000, rounded to the nearest whole Share and subject to adjustment thereafter from time to time in accordance with the
provisions of this Warrant. All shares, if any, for which this Warrant becomes exercisable pursuant to this Paragraph A(2) are referred to herein cumulatively as the “Additional Shares.” 

 (3) Additional Shares Pool. As used herein, “Additional Shares
Pool” means 152,195 shares of the Class, as such number may be adjusted from time to time in accordance with the provisions of this Warrant (as if the Additional Shares Pool constituted “Shares” at all times for such
purpose). For the avoidance of doubt, in no event shall the aggregate number of Shares for which this Warrant shall be exercisable exceed 202,927 (as such number may be adjusted from time to time in accordance with the provisions of this Warrant).

 SECTION 1. EXERCISE. 

1.1 Method of Exercise. Holder may at any time and from time to time exercise this Warrant, in whole or in part, by delivering to the
Company the original of this Warrant together with a duly executed Notice of Exercise in substantially the form attached hereto as Appendix 1 and, unless Holder is exercising this Warrant pursuant to a cashless exercise set forth in
Section 1.2, a check, wire transfer of same-day funds (to an account designated by the Company), or other form of payment acceptable to the Company for the aggregate Warrant Price for the Shares being
purchased. 
 1.2 Cashless Exercise. On any exercise of this Warrant, in lieu of payment of the aggregate Warrant Price in the manner
as specified in Section 1.1 above, but otherwise in accordance with the requirements of Section 1.1, Holder may elect to receive Shares equal to the value of this Warrant, or portion hereof as to which this Warrant is being exercised.
Thereupon, the Company shall issue to the Holder such number of fully paid and non-assessable Shares as are computed using the following formula: 

X = Y(A-B)/A 

where: 
  

					
		  	X =	  	the number of Shares to be issued to the Holder;
			
		  	Y =	  	the number of Shares with respect to which this Warrant is being exercised (inclusive of the Shares surrendered to the Company in payment of the aggregate Warrant Price);
			
		  	A =	  	the Fair Market Value (as determined pursuant to Section 1.3 below) of one Share; and
			
		  	B =	  	the Warrant Price.

 1.3 Fair Market Value. If the Company’s common stock is then traded or quoted on a nationally
recognized securities exchange, inter-dealer quotation system or over-the-counter market (a “Trading Market”) and the Class is common stock,
the fair market value of a Share shall be the closing price or last sale price of a share of common stock reported for the Business Day immediately before the date on which Holder delivers this Warrant together with its Notice of Exercise to the
Company. If the Company’s common stock is then traded in a Trading Market and the Class is a series of the Company’s convertible preferred stock, the fair market value of a Share shall be the closing price or last sale price of a
share of the Company’s common stock reported for the Business Day immediately before the date on which Holder delivers this Warrant together with its Notice of Exercise to the Company multiplied by the number of shares of the Company’s
common stock into which a Share is then convertible. If the Company’s common stock is not traded in a Trading Market, the Board of Directors of the Company shall determine the fair market value of a Share in its reasonable good faith judgment.

  
 2 

 1.4 Delivery of Certificate and New Warrant. Within a reasonable time after Holder
exercises this Warrant in the manner set forth in Section 1.1 or 1.2 above, the Company shall deliver to Holder a certificate representing the Shares issued to Holder upon such exercise and, if this Warrant has not been fully exercised and has
not expired, a new warrant of like tenor representing the Shares not so acquired. 
 1.5 Replacement of Warrant. On receipt of
evidence reasonably satisfactory to the Company of the loss, theft, destruction or mutilation of this Warrant and, in the case of loss, theft or destruction, on delivery of an indemnity agreement reasonably satisfactory in form, substance and amount
to the Company or, in the case of mutilation, on surrender of this Warrant to the Company for cancellation, the Company shall, within a reasonable time, execute and deliver to Holder, in lieu of this Warrant, a new warrant of like tenor and amount.

 1.6 Treatment of Warrant Upon Acquisition of Company. 

(a) Acquisition. For the purpose of this Warrant, “Acquisition” means any transaction or series of related
transactions involving: (i) the sale, lease, exclusive license, or other disposition of all or substantially all of the assets of the Company (ii) any merger or consolidation of the Company into or with another person or entity (other than
a merger or consolidation effected exclusively to change the Company’s domicile), or any other corporate reorganization, in which the stockholders of the Company in their capacity as such immediately prior to such merger, consolidation or
reorganization, own less than a majority of the Company’s (or the surviving or successor entity’s) outstanding voting power immediately after such merger, consolidation or reorganization (or, if such Company stockholders beneficially own a
majority of the outstanding voting power of the surviving or successor entity as of immediately after such merger, consolidation or reorganization, such surviving or successor entity is not the Company); or (iii) any sale or other transfer by
the stockholders of the Company of shares representing at least a majority of the Company’s then-total outstanding combined voting power (other than transfers for no consideration by one or more of such stockholders who are natural persons to
his or their respective family members, or to trusts established for the benefit of such family members, for estate planning purposes). 

(b) Treatment of Warrant at Acquisition. In the event of an Acquisition in which the consideration to be received by the Company’s
stockholders consists solely of cash, solely of Marketable Securities or a combination of cash and Marketable Securities (a “Cash/Public Acquisition”), and the fair market value of one Share as determined in accordance with
Section 1.3 above would be greater than the Warrant Price in effect on such date immediately prior to such Cash/Public Acquisition, and Holder has not exercised this Warrant pursuant to Section 1.1 above as to all Shares, then this Warrant
shall automatically be deemed to be Cashless Exercised pursuant to Section 1.2 above as to all Shares effective immediately prior to and contingent upon the consummation of a Cash/Public Acquisition. In connection with such Cashless Exercise,
Holder shall be deemed to have restated each of the representations and warranties in Section 4 of the Warrant as of the date thereof and the Company shall promptly notify the Holder of the number of Shares (or such other securities) issued
upon exercise. In the event of a Cash/Public Acquisition where the fair market value of one Share as determined in accordance with Section 1.3 above would be less than the Warrant Price in effect immediately prior to such Cash/Public
Acquisition, then this Warrant will expire immediately prior to the consummation of such Cash/Public Acquisition. 

  
 3 

 (c) Upon the closing of any Acquisition other than a Cash/Public Acquisition, the acquiring,
surviving or successor entity shall assume the obligations of this Warrant, and this Warrant shall thereafter be exercisable for the same securities and/or other property as would have been paid for the Shares issuable upon exercise of the
unexercised portion of this Warrant as if such Shares were outstanding on and as of the closing of such Acquisition, subject to further adjustment from time to time in accordance with the provisions of this Warrant. 

(d) As used in this Warrant, “Marketable Securities” means securities meeting all of the following requirements:
(i) the issuer thereof is then subject to the reporting requirements of Section 13 or Section 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and is then current in its filing of
all required reports and other information under the Act and the Exchange Act; (ii) the class and series of shares or other security of the issuer that would be received by Holder in connection with the Acquisition were Holder to exercise this
Warrant on or prior to the closing thereof is then traded in a Trading Market, and (iii) following the closing of such Acquisition, Holder would not be restricted from publicly re-selling all of the
issuer’s shares and/or other securities that would be received by Holder in such Acquisition were Holder to exercise this Warrant in full on or prior to the closing of such Acquisition, except to the extent that any such restriction
(x) arises solely under federal or state securities laws, rules or regulations, and (y) does not extend beyond six (6) months from the closing of such Acquisition. 

SECTION 2. ADJUSTMENTS TO THE SHARES AND WARRANT PRICE. 

2.1 Stock Dividends, Splits, Etc. If the Company declares or pays a dividend or distribution on the outstanding shares of the
Class payable in common stock or other securities or property (other than cash), then upon exercise of this Warrant, for each Share acquired, Holder shall receive, without additional cost to Holder, the total number and kind of securities and
property which Holder would have received had Holder owned the Shares of record as of the date the dividend or distribution occurred. If the Company subdivides the outstanding shares of the Class by reclassification or otherwise into a greater
number of shares, the number of Shares purchasable hereunder shall be proportionately increased and the Warrant Price shall be proportionately decreased. If the outstanding shares of the Class are combined or consolidated, by reclassification
or otherwise, into a lesser number of shares, the Warrant Price shall be proportionately increased and the number of Shares shall be proportionately decreased. 

2.2 Reclassification, Exchange, Combinations or Substitution. Upon any event whereby all of the outstanding shares of the Class are
reclassified, exchanged, combined, substituted, or replaced for, into, with or by Company securities of a different class and/or series, then from and after the consummation of such event, this Warrant will be exercisable for the number, class and
series of Company securities that Holder would have received had the Shares been outstanding on and as of the consummation of such event, and subject to further adjustment thereafter from time to time in accordance with the provisions of this
Warrant. The provisions of this Section 2.2 shall similarly apply to successive reclassifications, exchanges, combinations, substitutions, replacements or other similar events. 

2.3 Conversion of Preferred Stock. If the Class is a class and series of the Company’s convertible preferred stock, in the
event that all outstanding shares of the Class are converted, automatically or by action of the holders thereof, into common stock pursuant to the provisions of the Company’s Certificate of Incorporation, including, without limitation, in
connection with the 

  
 4 

 Company’s initial, underwritten public offering and sale of its common stock pursuant to an effective
registration statement under the Act (the “IPO”), then from and after the date on which all outstanding shares of the Class have been so converted, this Warrant shall be exercisable for such number of shares of common
stock into which the Shares would have been converted had the Shares been outstanding on the date of such conversion, and the Warrant Price shall equal the Warrant Price in effect as of immediately prior to such conversion divided by the number of
shares of common stock into which one Share would have been converted, all subject to further adjustment thereafter from time to time in accordance with the provisions of this Warrant. 

2.4 Adjustments for Diluting Issuances. It is acknowledged that the Shares for which this Warrant may be exercised have certain rights
under the Company’s Certificate of Incorporation, including conversion price adjustments for diluting issuances under certain circumstances, which rights may be amended from time to time pursuant to the provisions of the Certificate of
Incorporation.     
 2.5 No Fractional Share. No fractional Share shall be issuable upon exercise of this Warrant
and the number of Shares to be issued shall be rounded down to the nearest whole Share. If a fractional Share interest arises upon any exercise of the Warrant, the Company shall eliminate such fractional Share interest by paying Holder in cash the
amount computed by multiplying the fractional interest by (i) the fair market value (as determined in accordance with Section 1.3 above) of a full Share, less (ii) the then-effective Warrant Price. 

2.6 Notice/Certificate as to Adjustments. Upon each adjustment of the Warrant Price, Class and/or number of Shares, the Company, at
the Company’s expense, shall notify Holder in writing within a reasonable time setting forth the adjustments to the Warrant Price, Class and/or number of Shares and facts upon which such adjustment is based. The Company shall, upon written
request from Holder, furnish Holder with a certificate of its Chief Financial Officer, including computations of such adjustment and the Warrant Price, Class and number of Shares in effect upon the date of such adjustment. 

SECTION 3. REPRESENTATIONS AND COVENANTS OF THE COMPANY. 

3.1 Representations and Warranties. The Company represents and warrants to, and agrees with, the Holder as follows: 

(a) The initial Warrant Price referenced on the first page of this Warrant is not greater than the price per share at which shares of the
Class were last sold and issued prior to the Issue Date hereof in an arms-length transaction in which at least $500,000 of such shares were sold.     

(b) The number of Initial Shares first set forth above together with the number of shares constituting the Additional Shares Pool first set
forth above collectively represent not less than 0.110% of the Company’s total issued shares of capital stock, calculated on and as of the Issue Date hereof on a fully-diluted, common stock-equivalent basis assuming (i) the conversion into
common stock of all outstanding securities and instruments (including, without limitation, securities deemed to be outstanding pursuant to clause (ii) of this Section 3.1(b)) convertible by their terms into shares of common stock
(regardless of whether such securities or instruments are by their terms now so convertible), (ii) the exercise in full of all outstanding options, warrants (including, without limitation, this Warrant) and other rights to purchase or acquire shares
of common stock or securities exercisable for or convertible into shares of common stock (regardless of whether such options, warrants or other rights to purchase or acquire are by their terms now exercisable); and (iii) the inclusion of all
shares of common stock reserved for issuance under all of the Company’s incentive stock and stock option plans and not now subject to outstanding grants or options. 

  
 5 

 (c) All Shares which may be issued upon the exercise of this Warrant, and all securities,
if any, issuable upon conversion of the Shares, shall, upon issuance, be duly authorized, validly issued, fully paid and non-assessable, and free of any liens and encumbrances except for restrictions on
transfer provided for herein or under applicable federal and state securities laws. The Company covenants that it shall at all times cause to be reserved and kept available out of its authorized and unissued capital stock such number of shares of
the Class, common stock and other securities as will be sufficient to permit the exercise in full of this Warrant and the conversion of the Shares into common stock or such other securities. 

(d) The Company’s capitalization table attached hereto as Schedule 1 is true and complete, in all material respects, as of the Issue
Date. 
 3.2 Notice of Certain Events. If the Company proposes at any time to: 

(a) declare any dividend or distribution upon the outstanding shares of the Class or common stock, whether in cash, property, stock, or
other securities and whether or not a regular cash dividend; 
 (b) offer for subscription or sale pro rata to the holders of the
outstanding shares of the Class any additional shares of any class or series of the Company’s stock (other than pursuant to contractual pre-emptive rights); 

(c) effect any reclassification, exchange, combination, substitution, reorganization or recapitalization of the outstanding shares of the
Class; 
 (d) effect an Acquisition or to liquidate, dissolve or wind up; or 

(e) effect an IPO; then, in connection with each such event, the Company shall give Holder: 

(1) in the case of the matters referred to in (a) and (b) above, at least seven (7) Business Days prior written
notice of the earlier to occur of the effective date thereof or the date on which a record will be taken for such dividend, distribution, or subscription rights (and specifying the date on which the holders of outstanding shares of the
Class will be entitled thereto) or for determining rights to vote, if any; 
 (2) in the case of the matters
referred to in (c) and (d) above at least seven (7) Business Days prior written notice of the date when the same will take place (and specifying the date on which the holders of outstanding shares of the Class will be entitled to
exchange their shares for the securities or other property deliverable upon the occurrence of such event and such reasonable information as Holder may reasonably require regarding the treatment of this Warrant in connection with such event giving
rise to the notice); and 

  
 6 

 (3) with respect to the IPO, at least seven (7) Business Days prior
written notice of the date on which the Company proposes to file its registration statement in connection therewith.     
 The Company
will also provide information requested by Holder that is reasonably necessary to enable Holder to comply with Holder’s accounting or reporting requirements. 

SECTION 4. REPRESENTATIONS, WARRANTIES OF THE HOLDER. 

The Holder represents and warrants to the Company as follows: 

4.1 Purchase for Own Account. This Warrant and the securities to be acquired upon exercise of this Warrant by Holder are being acquired
for investment for Holder’s account, not as a nominee or agent, and not with a view to the public resale or distribution within the meaning of the Act. Holder also represents that it has not been formed for the specific purpose of acquiring
this Warrant or the Shares. 
 4.2 Disclosure of Information. Holder is aware of the Company’s business affairs and financial
condition and has received or has had full access to all the information it considers necessary or appropriate to make an informed investment decision with respect to the acquisition of this Warrant and its underlying securities. Holder further has
had an opportunity to ask questions and receive answers from the Company regarding the terms and conditions of the offering of this Warrant and its underlying securities and to obtain additional information (to the extent the Company possessed such
information or could acquire it without unreasonable effort or expense) necessary to verify any information furnished to Holder or to which Holder has access. 

4.3 Investment Experience. Holder understands that the purchase of this Warrant and its underlying securities involves substantial risk.
Holder has experience as an investor in securities of companies in the development stage and acknowledges that Holder can bear the economic risk of such Holder’s investment in this Warrant and its underlying securities and has such knowledge
and experience in financial or business matters that Holder is capable of evaluating the merits and risks of its investment in this Warrant and its underlying securities and/or has a preexisting personal or business relationship with the Company and
certain of its officers, directors or controlling persons of a nature and duration that enables Holder to be aware of the character, business acumen and financial circumstances of such persons. 

4.4 Accredited Investor Status. Holder is an “accredited investor” within the meaning of Regulation D promulgated under the
Act. 
 4.5 The Act. Holder understands that this Warrant and the Shares issuable upon exercise hereof have not been registered under
the Act in reliance upon a specific exemption therefrom, which exemption depends upon, among other things, the bona fide nature of the Holder’s investment intent as expressed herein. Holder understands that this Warrant and the Shares issued
upon any exercise hereof must be held indefinitely unless subsequently registered under the Act and qualified under applicable state securities laws, or unless exemption from such registration and qualification are otherwise available. Holder is
aware of the provisions of Rule 144 promulgated under the Act. 
 4.6 Market Stand-off
Agreement. The Holder agrees that the Shares shall be subject to the Market Standoff provisions in Section 2.11 of the Company’s Investor Rights Agreement, as amended and in effect from time to time, and the Company may place a
restrictive legend on any certificate representing any Shares issued on exercise hereof stating that they are subject to such provisions.     

  
 7 

 4.7 No Voting Rights. Holder, as a Holder of this Warrant, will not have any voting
rights until the exercise of this Warrant. 
 SECTION 5. MISCELLANEOUS. 

5.1 Term; Automatic Cashless Exercise Upon Expiration.     

(a) Term. Subject to the provisions of Section 1.6 above, this Warrant is exercisable in whole or in part at any time and from time
to time on or before 6:00 PM, Pacific time, on the Expiration Date and shall be void thereafter.     
 (b) Automatic
Cashless Exercise upon Expiration. In the event that, upon the Expiration Date, the fair market value of one Share (or other security issuable upon the exercise hereof) as determined in accordance with Section 1.3 above is greater than the
Warrant Price in effect on such date, then this Warrant shall automatically be deemed on and as of such date to be exercised pursuant to Section 1.2 above as to all Shares (or such other securities) for which it shall not previously have been
exercised, and the Company shall, within a reasonable time, deliver a certificate representing the Shares (or such other securities) issued upon such exercise to Holder. 

5.2 Legends. Each certificate evidencing Shares (and each certificate evidencing securities issued upon conversion of any Shares, if
any) shall be imprinted with a legend in substantially the following form: 
 THE SHARES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE SECURITIES LAWS OF ANY STATE AND, EXCEPT AS SET FORTH IN THAT CERTAIN WARRANT TO PURCHASE STOCK ISSUED BY THE ISSUER TO SILICON VALLEY BANK DATED
DECEMBER 24, 2018, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR, IN THE OPINION OF LEGAL COUNSEL IN FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER, SUCH OFFER, SALE, PLEDGE OR
OTHER TRANSFER IS EXEMPT FROM SUCH REGISTRATION. 
 5.3 Compliance with Securities Laws on Transfer. This Warrant and the Shares
issued upon exercise of this Warrant (and the securities issuable, directly or indirectly, upon conversion of the Shares, if any) may not be transferred or assigned in whole or in part except in compliance with applicable federal and state
securities laws by the transferor and the transferee (including, without limitation, the delivery of investment representation letters and legal opinions reasonably satisfactory to the Company, as reasonably requested by the Company). The Company
shall not require Holder to provide an opinion of counsel if the transfer is to SVB Financial Group (Silicon Valley Bank’s parent company) or any other affiliate of Holder, provided that any such transferee is an “accredited investor”
as defined in Regulation D promulgated under the Act. Additionally, the Company shall also not require an opinion of counsel if there is no material question as to the availability of Rule 144 promulgated under the Act. 

  
 8 

 5.4 Transfer Procedure. After receipt by Silicon Valley Bank of the executed Warrant,
Silicon Valley Bank will transfer all of this Warrant to its parent company, SVB Financial Group. By its acceptance of this Warrant, SVB Financial Group hereby makes to the Company each of the representations and warranties set forth in
Section 4 hereof and agrees to be bound by all of the terms and conditions of this Warrant as if the original Holder hereof. Subject to the provisions of Section 5.3 and upon providing the Company with written notice, SVB Financial Group
and any subsequent Holder may transfer all or part of this Warrant or the Shares issued upon exercise of this Warrant (or the securities issued upon conversion of the Shares, if any) to any transferee, provided, however, in connection with any such
transfer, SVB Financial Group or any subsequent Holder will give the Company notice of the portion of the Warrant and/or Shares (and/or securities issued upon conversion of the Shares, if any) being transferred with the name, address and taxpayer
identification number of the transferee and Holder will surrender this Warrant to the Company for reissuance to the transferee(s) (and Holder if applicable); and provided further, that any subsequent transferee other than SVB Financial Group shall
agree in writing with the Company to be bound by all of the terms and conditions of this Warrant. Notwithstanding any contrary provision herein, at all times prior to the IPO, Holder may not, without the Company’s prior written consent,
transfer this Warrant or any portion hereof, or any Shares issued upon any exercise hereof, or any shares or other securities issued upon any conversion of any Shares issued upon any exercise hereof, to any person or entity who directly competes
with the Company, except in connection with an Acquisition of the Company by such a direct competitor. 
 5.5 Notices. All notices and
other communications hereunder from the Company to the Holder, or vice versa, shall be deemed delivered and effective (i) when given personally, (ii) on the third (3rd) Business Day after being mailed by first-class registered or certified
mail, postage prepaid, (iii) upon actual receipt if given by facsimile or electronic mail and such receipt is confirmed in writing by the recipient, or (iv) on the first Business Day following delivery to a reliable overnight courier
service, courier fee prepaid, in any case at such address as may have been furnished to the Company or Holder, as the case may be, in writing by the Company or such Holder from time to time in accordance with the provisions of this Section 5.5.
All notices to Holder shall be addressed as follows until the Company receives notice of a change of address in connection with a transfer or otherwise: 

SVB Financial Group 
 Attn:
Treasury Department 
 3003 Tasman Drive, HC 215 

Santa Clara, CA 95054 

Telephone: (408) 654-7400 

Facsimile: (408) 988-8317 

Email address: svbfgwarrants@svb.com 

Notice to the Company shall be addressed as follows until Holder receives notice of a change in address: 

Fastly, Inc. 
 Attn: Chief
Financial Officer     
 475 Brannan Street, Suite 320     

San Francisco, CA 94107     

Telephone: 
 Facsimile: 

Email: 

  
 9 

 With a copy (which shall not constitute notice) to: 

Cooley LLP 
 Attn: Mark P.
Tanoury     
 3175 Hanover Street     

Palo Alto, CA 94304-1130     

Telephone: (650) 843-5016 

Facsimile: (650) 849-7400 

Email: tanourymp@cooley.com 
 5.6
Waiver. This Warrant and any term hereof may be changed, waived, discharged or terminated (either generally or in a particular instance and either retroactively or prospectively) only by an instrument in writing signed by the party against
which enforcement of such change, waiver, discharge or termination is sought. 
 5.7 Attorneys’ Fees. In the event of any dispute
between the parties concerning the terms and provisions of this Warrant, the party prevailing in such dispute shall be entitled to collect from the other party all costs incurred in such dispute, including reasonable attorneys’ fees. 

5.8 Counterparts; Facsimile/Electronic Signatures. This Warrant may be executed in counterparts, all of which together shall constitute
one and the same agreement. Any signature page delivered electronically or by facsimile shall be binding to the same extent as an original signature page with regards to any agreement subject to the terms hereof or any amendment thereto. 

5.9 Governing Law. This Warrant shall be governed by and construed in accordance with the laws of the State of California, without
giving effect to its principles regarding conflicts of law. 
 5.10 Headings. The headings in this Warrant are for purposes of
reference only and shall not limit or otherwise affect the meaning of any provision of this Warrant. 
 5.11 Business Days.
“Business Day” is any day that is not a Saturday, Sunday or a day on which Silicon Valley Bank is closed. 

[Remainder of page left blank intentionally] 

[Signature page follows] 

  
 10 

 IN WITNESS WHEREOF, the parties have caused this Warrant to Purchase Stock to be executed by
their duly authorized representatives effective as of the Issue Date written above. 
  

			
	“COMPANY”
	
	FASTLY, INC.
		
	By:	 	 /s/ Adriel Lares

		
	Name:	 	 Adriel Lares

		 	(Print)
	Title:	 	CFO
	
	“HOLDER”
	
	SILICON VALLEY BANK
		
	By:	 	 /s/ Lane Bruno

		
	Name:	 	 Lane Bruno

		 	(Print)
	Title:	 	Director

 Signature Page to Warrant to Purchase Stock 

 APPENDIX 1 

NOTICE OF EXERCISE 
 1.
The undersigned Holder hereby exercises its right to purchase                          shares of the Common/Series
                     Preferred [circle one] Stock
of                                         (the
“Company”) in accordance with the attached Warrant To Purchase Stock, and tenders payment of the aggregate Warrant Price for such shares as follows: 

[    ] check in the amount of
$                         payable to order of the Company enclosed herewith 

[    ] Wire transfer of immediately available funds to the Company’s account 

[    ] Cashless Exercise pursuant to Section 1.2 of the Warrant 

[    ] Other [Describe]
                                         
                            

2. Please issue a certificate or certificates representing the Shares in the name specified below: 

 

					
		 	  
	 	
	
                   
 
	 	 Holder’s Name
	 	
			
		 	  
	 	
			
		 	  
	 	
		 	 (Address)
	 	

 3. By its execution below and for the benefit of the Company, Holder hereby restates each of the
representations and warranties in Section 4 of the Warrant to Purchase Stock as of the date hereof. 
  

			
	 HOLDER:
  

		
	By:	 	
                     
            

		
	Name:	 	  

		
	Title:	 	  

		
	(Date):	 	  

  
 Appendix 1 

 SCHEDULE 1 

Company Capitalization Table 

See attached 

  
 Schedule 1

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