Form of Medium-Term Notes, Series K





 Exhibit 4.2 

[Face of Note] 

Unless this certificate is presented by an authorized representative of The Depository Trust Company, a New York corporation
(“DTC”), to the Company or its agent for registration of transfer, exchange or payment, and any certificate issued is registered in the name of Cede & Co. or in such other name as requested by an authorized representative
of DTC (and any payment is made to Cede & Co. or such other entity as is requested by an authorized representative of DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL inasmuch as the
registered owner hereof, Cede & Co., has an interest herein. 
  

	 CUSIP NO. 95000E5L9 
	
FACE AMOUNT: $                   
  


 REGISTERED NO.      

WELLS FARGO & COMPANY 

MEDIUM-TERM NOTE, SERIES K 

Due Nine Months or More From Date of Issue 

Principal at Risk Securities Linked to the Lowest Performing of the Russell 2000®
Index 
 and the PowerShares QQQ TrustSM, Series 1 due January 28, 2021

 WELLS FARGO & COMPANY, a corporation duly organized and existing under the laws of the State of Delaware
(hereinafter called the “Company,” which term includes any successor corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to CEDE & Co., or registered assigns, an amount equal
to the Redemption Amount (as defined below), in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts, on the Stated Maturity Date (as defined below). The
“Initial Stated Maturity Date” shall be January 28, 2021. If the Calculation Day (as defined below) is not postponed, the Initial Stated Maturity Date will be the “Stated Maturity Date.” If the Calculation Day
is postponed, the “Stated Maturity Date” shall be the later of (i) the Initial Stated Maturity Date and (ii) three Business Days (as defined below) after the last Calculation Day as postponed. This Security shall not bear
any interest. 
 Any payments on this Security at Maturity will be made against presentation of this Security at the office
or agency of the Company maintained for that purpose in the City of Minneapolis, Minnesota and at any other office or agency maintained by the Company for such purpose. 

“Face Amount” shall mean, when used with respect to this Security, the amount set forth on the face of this
Security as its “Face Amount.” 









 Determination of Redemption Amount 

The “Redemption Amount” of this Security will equal: 

 

	 	•	 	 if the Ending Value of the Lowest Performing Market Measure is greater than its Starting Value: the lesser of:



  

	 	(i)	 the Face Amount plus 



 

																																	
		 		 		 		 		 		 		 		 		 		 		 		 		 		 		 		 	
		 		 		 		 	 	 	Face Amount	 	  x    	 	Market Measure Performance of the Lowest Performing Market Measure	 	  x  	 	Participation Rate	 	 	 		 		 		 		 	 ; and	 	
		 		 		 		 	 	 	 	 	 	 	 	 	 		 		 		 		 	 

  

	 	(ii)	 the Capped Value; 


  


	 	•	 	 if the Ending Value of the Lowest Performing Market Measure is less than or equal to its Starting Value, but
greater than or equal to its Threshold Value: the Face Amount; or 


  

	 	•	 	 if the Ending Value of the Lowest Performing Market Measure is less than its Threshold Value: the Face Amount
plus 


  

																											
		 		 		 		 		 		 		 		 		 		 		 		 		 	
		 		 		 		 		 	Face Amount	 	  x        	 	 Market Measure Performance of the

Lowest Performing Market Measure
	 		 		 		 		 		 	
		 		 		 		 		 		 	 	 		 		 		 		 		 	

 All calculations with respect to the Redemption Amount will be rounded to the nearest one hundred-thousandth,
with five one-millionths rounded upward (e.g., 0.000005 would be rounded to 0.00001); and the Redemption Amount will be rounded to the nearest cent, with one-half cent
rounded upward. 
 “Index” shall mean the Russell
2000® Index. 
 “Fund” shall mean the PowerShares
QQQ TrustSM, Series 1. 
 “Market Measure” shall mean
each of the Index and the Fund. 
 The “Pricing Date” shall mean January 24, 2018. 

The “Lowest Performing Market Measure” will be the Market Measure with the lowest Market Measure Performance
as measured from its Starting Value to its Ending Value. 
 The “Market Measure Performance” with respect
to a Market Measure is the percentage change from its Starting Value to its Ending Value, measured as follows: 
 Ending Value –
Starting Value 
 Starting Value 

  
 2 










 The “Closing Value” with respect to the Index on any
Trading Day is its Closing Level on that Trading Day; and with respect to the Fund on any Trading Day is its Fund Closing Price on that Trading Day. 

The “Closing Level” of the Index on any Trading Day means the official closing level of the Index reported by
the Index Sponsor on such Trading Day, as obtained by the Calculation Agent on such Trading Day from the licensed third-party market data vendor contracted by the Calculation Agent at such time; in particular, taking into account the decimal
precision and/or rounding convention employed by such licensed third-party market data vendor on such date, subject to the provisions set forth below under “Discontinuance of the Index; Alteration of Method of Calculation” and “Market
Disruption Events.” 
 The “Fund Closing Price” with respect to the Fund on any Trading Day means the
product of (i) the Closing Price of one share of the Fund (or one unit of any other security for which a Fund Closing Price must be determined) on such Trading Day and (ii) the Adjustment Factor on such Trading Day. 

The “Closing Price” with respect to a share of the Fund (or one unit of any other security for which a
Closing Price must be determined) on any Trading Day means the price, at the scheduled weekday closing time, without regard to after hours or any other trading outside the regular trading session hours, of the share on the principal United States
securities exchange registered under the Securities Exchange Act of 1934, as amended, on which the share (or any such other security) is listed or admitted to trading. 

The “Adjustment Factor” means, with respect to a share of the Fund (or one unit of any other security for
which a Fund Closing Price must be determined), 1.0, subject to adjustment in the event of certain events affecting the shares of the Fund. See “Anti-dilution Adjustments Relating to the Fund; Alternate Calculation” below. 

The “Starting Value” with respect to the Russell 2000 Index is 1599.611, its Closing Value on the Pricing
Date, and with respect to the PowerShares QQQ Trust, Series 1 is $168.41, its Closing Value on the Pricing Date. 
 The
“Ending Value” of a Market Measure will be its Closing Value on the Calculation Day. 
 The
“Threshold Value” with respect to the Russell 2000 Index is 959.7666, which is equal to 60% of its Starting Value, and with respect to the PowerShares QQQ Trust, Series 1 is $101.046, which is equal to 60% of its Starting
Value. 
 The “Participation Rate” is 350% 

The “Capped Value” is 135% of the Face Amount of this Security. 

“Index Sponsor” shall mean the sponsor or publisher of the Index. 

“Fund Sponsor” shall mean the sponsor of the Fund. 

  
 3 










 “Business Day” shall mean a day, other than a Saturday or
Sunday, that is neither a legal holiday nor a day on which banking institutions are authorized or required by law or regulation to close in New York, New York. 

The “Calculation Day” is January 25, 2021. If the Calculation Day is not a Trading Day with respect to
either Market Measure, the Calculation Day for each Market Measure will be postponed to the next succeeding day that is a Trading Day with respect to each Market Measure. The Calculation Day for a Market Measure is also subject to postponement due
to the occurrence of a Market Disruption Event (as defined below) with respect to such Market Measure. If a Market Disruption Event occurs or is continuing with respect to a Market Measure on the Calculation Day, then the Calculation Day for such
Market Measure will be postponed to the first succeeding Trading Day for such Market Measure on which a Market Disruption Event for such Market Measure has not occurred and is not continuing; however, if such first succeeding Trading Day has not
occurred as of the eighth Trading Day for such Market Measure after the originally scheduled Calculation Day, that eighth Trading Day shall be deemed to be the Calculation Day for such Market Measure. If the Calculation Day has been postponed eight
Trading Days for a Market Measure after the originally scheduled Calculation Day and a Market Disruption Event occurs or is continuing with respect to such Market Measure on such eighth Trading Day, the Calculation Agent will determine the Closing
Value of such Market Measure on such eighth Trading Day (i) in the case of the Index, in accordance with the formula for and method of calculating the Closing Level of the Index last in effect prior to commencement of the Market Disruption
Event, using the closing price (or, with respect to any relevant security, if a Market Disruption Event has occurred with respect to such security, its good faith estimate of the value of such security at the Scheduled Closing Time of the Relevant
Stock Exchange for such security or, if earlier, the actual closing time of the regular trading session of such Relevant Stock Exchange) on such date of each security included in the Index and (ii) in the case of the Fund, based on its good
faith estimate of the value of the shares (or other applicable securities) of the Fund as of the close of trading on such date. As used in clause (i) of the immediately preceding sentence, “closing price” means, with respect to
any security on any date, the Relevant Stock Exchange traded or quoted price of such security as of the Scheduled Closing Time of the Relevant Stock Exchange for such security or, if earlier, the actual closing time of the regular trading session of
such Relevant Stock Exchange. Notwithstanding the postponement of the Calculation Day for one Market Measure due to a Market Disruption Event with respect to such Market Measure on the Calculation Day, the originally scheduled Calculation Day will
remain the Calculation Day for the other Market Measure if such other Market Measure is not affected by a Market Disruption Event on such day. 

“Calculation Agent Agreement” shall mean the Calculation Agent Agreement dated as of March 18, 2015
between the Company and the Calculation Agent, as amended from time to time. 
 “Calculation Agent” shall
mean the Person that has entered into the Calculation Agent Agreement with the Company providing for, among other things, the determination of the Redemption Amount, which term shall, unless the context otherwise requires, include its successors
under such Calculation Agent Agreement. The initial Calculation Agent shall be Wells Fargo Securities, LLC. Pursuant to the Calculation Agent Agreement, the Company may appoint a different Calculation Agent from time to time after the initial
issuance of this Security 

  
 4 










 
without the consent of the Holder of this Security and without notifying the Holder of this Security. 

A “Trading Day” with respect to the Index means a day, as determined by the Calculation Agent, on which
(i) the Relevant Stock Exchanges with respect to each security underlying the Index are scheduled to be open for trading for their respective regular trading sessions and (ii) each Related Futures or Options Exchange is scheduled to be
open for trading for its regular trading session. The “Relevant Stock Exchange” for any security underlying the Index means the primary exchange or quotation system on which such security is traded, as determined by the Calculation
Agent. The “Related Futures or Options Exchange” for the Index means an exchange or quotation system where trading has a material effect (as determined by the Calculation Agent) on the overall market for futures or options contracts
relating to the Index. 
 A “Trading Day” with respect to the Fund means a day, as determined by the
Calculation Agent, on which the Relevant Stock Exchange and each Related Futures or Options Exchange with respect to the Fund or any successor thereto are scheduled to be open for trading for their respective regular trading sessions. The
“Relevant Stock Exchange” for the Fund means the primary exchange or quotation system on which shares (or other applicable securities) of the Fund are traded, as determined by the Calculation Agent. The “Related Futures or
Options Exchange” for the Fund means each exchange or quotation system where trading has a material effect (as determined by the Calculation Agent) on the overall market for futures or options contracts relating to the Fund. 

Discontinuance Of The Index; Alteration Of Method Of Calculation 

If the Index Sponsor discontinues publication of the Index, and the Index Sponsor or another entity publishes a successor or
substitute equity index that the Calculation Agent determines, in its sole discretion, to be comparable to the Index (a “Successor Equity Index”), then, upon the Calculation Agent’s notification of that determination to the
Trustee and the Company, the Calculation Agent will substitute the Successor Equity Index as calculated by the relevant Index Sponsor or any other entity for purposes of calculating the Ending Value of the Index. Upon any selection by the
Calculation Agent of a Successor Equity Index, the Company will cause notice to be given to the Holder of this Security. 

In the event that the Index Sponsor discontinues publication of the Index prior to, and the discontinuance is continuing on,
the Calculation Day and the Calculation Agent determines that no Successor Equity Index is available at such time, the Calculation Agent will calculate a substitute Closing Level for the Index in accordance with the formula for and method of
calculating the Index last in effect prior to the discontinuance, but using only those securities that comprised the Index immediately prior to that discontinuance. If a Successor Equity Index is selected or the Calculation Agent calculates a level
as a substitute for the Index, the Successor Equity Index or level will be used as a substitute for the Index for all purposes, including the purpose of determining whether a Market Disruption Event exists. 

If on the Calculation Day the Index Sponsor fails to calculate and announce the level of the Index, the Calculation Agent will
calculate a substitute Closing Level of the Index in accordance with the formula for and method of calculating the Index last in effect prior to the 

  
 5 










 
failure, but using only those securities that comprised the Index immediately prior to that failure; provided that, if a Market Disruption Event occurs or is continuing on such day with
respect to the Index, then the provisions set forth above under the definition of “Calculation Day” shall apply in lieu of the foregoing. 

If at any time the Index Sponsor makes a material change in the formula for or the method of calculating the Index, or in any
other way materially modifies the Index (other than a modification prescribed in that formula or method to maintain the Index in the event of changes in constituent stock and capitalization and other routine events), then, from and after that time,
the Calculation Agent will, at the close of business in New York, New York, on each date that the Closing Level of the Index is to be calculated, calculate a substitute Closing Level of the Index in accordance with the formula for and method of
calculating the Index last in effect prior to the change, but using only those securities that comprised the Index immediately prior to that change. Accordingly, if the method of calculating the Index is modified so that the level of the Index is a
fraction or a multiple of what it would have been if it had not been modified, then the Calculation Agent will adjust the Index in order to arrive at a level of the Index as if it had not been modified. 

Anti-dilution Adjustments Relating To The Fund; Alternate Calculation 

Anti-dilution Adjustments 

The Calculation Agent will adjust the Adjustment Factor with respect to the Fund as specified below if any of the events
specified below occurs with respect to the Fund and the effective date or ex-dividend date, as applicable, for such event is after the Pricing Date and on or prior to the Calculation Day. 

The adjustments specified below do not cover all events that could affect the Fund. The Calculation Agent may, in its sole
discretion, make additional adjustments to any terms of this Security upon the occurrence of other events that affect or could potentially affect the market price of, or shareholder rights in, the Fund, with a view to offsetting, to the extent
practical, any such change, and preserving the relative investment risks of this Security. In addition, the Calculation Agent may, in its sole discretion, make adjustments or a series of adjustments that differ from those described herein if the
Calculation Agent determines that such adjustments do not properly reflect the economic consequences of the events specified herein or would not preserve the relative investment risks of this Security. All determinations made by the Calculation
Agent in making any adjustments to the terms of this Security, including adjustments that are in addition to, or that differ from, those described herein, will be made in good faith and a commercially reasonable manner, with the aim of ensuring an
equitable result. In determining whether to make any adjustment to the terms of this Security, the Calculation Agent may consider any adjustment made by the Options Clearing Corporation or any other equity derivatives clearing organization on
options contracts on the Fund. 
 For any event described below, the Calculation Agent will not be required to adjust the
Adjustment Factor unless the adjustment would result in a change to the Adjustment Factor then in effect of at least 0.10%. The Adjustment Factor resulting from any adjustment will be rounded up or down, as appropriate, to the nearest one-hundred thousandth. 

  
 6 











	 	(A)	 Stock Splits and Reverse Stock Splits 



If a stock split or reverse stock split has occurred, then once such split has become effective, the Adjustment Factor will
be adjusted to equal the product of the prior Adjustment Factor and the number of securities which a holder of one share (or other applicable security) of the Fund before the effective date of such stock split or reverse stock split would have owned
or been entitled to receive immediately following the applicable effective date. 
  

	 	(B)	 Stock Dividends 



If a dividend or distribution of shares (or other applicable securities) to which this Security is linked has been made by
the Fund ratably to all holders of record of such shares (or other applicable security), then the Adjustment Factor will be adjusted on the ex-dividend date to equal the prior Adjustment Factor plus the
product of the prior Adjustment Factor and the number of shares (or other applicable security) of the Fund which a holder of one share (or other applicable security) of the Fund before the ex-dividend date
would have owned or been entitled to receive immediately following that date; provided, however, that no adjustment will be made for a distribution for which the number of securities of the Fund paid or distributed is based on a fixed cash
equivalent value. 
  

	 	(C)	 Extraordinary Dividends 



If an Extraordinary Dividend (as defined below) has occurred, then the Adjustment Factor will be adjusted on the ex-dividend date to equal the product of the prior Adjustment Factor and a fraction, the numerator of which is the Closing Price per share (or other applicable security) of the Fund on the Trading Day preceding the ex-dividend date, and the denominator of which is the amount by which the Closing Price per share (or other applicable security) of the Fund on the Trading Day preceding the
ex-dividend date exceeds the Extraordinary Dividend Amount (as defined below). 

For purposes of determining whether an Extraordinary Dividend has occurred: 

 

	 	(1)	 “Extraordinary Dividend” means any cash dividend or distribution (or portion thereof) that
the Calculation Agent determines, in its sole discretion, is extraordinary or special; and 


  

	 	(2)	 “Extraordinary Dividend Amount” with respect to an Extraordinary Dividend for the securities
of the Fund will equal the amount per share (or other applicable security) of the Fund of the applicable cash dividend or distribution that is attributable to the Extraordinary Dividend, as determined by the Calculation Agent in its sole discretion.



 A distribution on the securities of the Fund described below under the section entitled
“—Reorganization Events” below that also constitutes an Extraordinary 

  
 7 










 
Dividend will only cause an adjustment pursuant to that “—Reorganization Events” section. 
  

	 	(D)	 Other Distributions 



If the Fund declares or makes a distribution to all holders of the shares (or other applicable security) of the Fund of any non-cash assets, excluding dividends or distributions described under the section entitled “—Stock Dividends” above, then the Calculation Agent may, in its sole discretion, make such adjustment (if
any) to the Adjustment Factor as it deems appropriate in the circumstances. If the Calculation Agent determines to make an adjustment pursuant to this paragraph, it will do so with a view to offsetting, to the extent practical, any change in the
economic position of a holder of this Security that results solely from the applicable event. 
  

	 	(E)	 Reorganization Events 



If the Fund, or any Successor Fund, is subject to a merger, combination, consolidation or statutory exchange of securities
with another exchange traded fund, and the Fund to which this Security is linked is not the surviving entity (a “Reorganization Event”), then, on or after the date of such event, the Calculation Agent shall, in its sole discretion,
make an adjustment to the Adjustment Factor or the method of determining the Redemption Amount or any other terms of this Security as the Calculation Agent determines appropriate to account for the economic effect on this Security of such event, and
determine the effective date of that adjustment. If the Calculation Agent determines that no adjustment that it could make will produce a commercially reasonable result, then the Calculation Agent may deem such event a Liquidation Event (as defined
below). 
 Liquidation Events 

If the Fund is de-listed, liquidated or otherwise terminated (a “Liquidation
Event”), and a successor or substitute exchange traded fund exists that the Calculation Agent determines, in its sole discretion, to be comparable to the Fund, then, upon the Calculation Agent’s notification of that determination to
the Trustee and the Company, any subsequent Fund Closing Price for the Fund will be determined by reference to the Fund Closing Price of such successor or substitute exchange traded fund (such exchange traded fund being referred to herein as a
“Successor Fund”), with such adjustments as the Calculation Agent determines are appropriate to account for the economic effect of such substitution on the holder of this Security. 

If the Fund undergoes a Liquidation Event prior to, and such Liquidation Event is continuing on, the date that any Fund
Closing Price of the Fund is to be determined and the Calculation Agent determines that no Successor Fund is available at such time, then the Calculation Agent will, in its discretion, calculate the Fund Closing Price for the Fund on such date by a
computation methodology that the Calculation Agent determines will as closely as reasonably possible replicate the Fund, provided that if the Calculation Agent determines in its discretion that it is not practicable to replicate the Fund (including
but not limited to the instance 

  
 8 










 
in which the sponsor of the index underlying the Fund discontinues publication of that index), then the Calculation Agent will calculate the Fund Closing Price for the Fund in accordance with the
formula last used to calculate such Fund Closing Price before such Liquidation Event, but using only those securities that were held by the Fund immediately prior to such Liquidation Event without any rebalancing or substitution of such securities
following such Liquidation Event. 
 If a Successor Fund is selected or the Calculation Agent calculates the Fund Closing
Price as a substitute for the Fund, such Successor Fund or Fund Closing Price will be used as a substitute for the Fund for all purposes, including for purposes of determining whether a Market Disruption Event exists. 

If any event is both a Reorganization Event and a Liquidation Event, such event will be treated as a Reorganization Event for
purposes of this Security unless the Calculation Agent makes the determination referenced in the last sentence of the section entitled “—Anti-dilution Adjustments—Reorganization Events” above. 

Alternate Calculation 

If at any time the method of calculating the Fund or a Successor Fund, or the related index underlying the Fund or Successor
Fund, is changed in a material respect, or if the Fund or a Successor Fund is in any other way modified so that the Fund does not, in the opinion of the Calculation Agent, fairly represent the price of the securities of the Fund or a Successor Fund
had such changes or modifications not been made, then the Calculation Agent may, at the close of business in New York City on the date that any Fund Closing Price is to be determined, make such calculations and adjustments as, in the good faith
judgment of the Calculation Agent, may be necessary in order to arrive at a Closing Price of the Fund comparable to the Fund or such Successor Fund, as the case may be, as if such changes or modifications had not been made, and calculate the Fund
Closing Price and the Redemption Amount with reference to such adjusted Closing Price of the Fund or a Successor Fund, as applicable. 
 Market
Disruption Events 
 A “Market Disruption Event” with respect to the Index means any of the
following events as determined by the Calculation Agent in its sole discretion: 
  

	 	(A)	 The occurrence or existence of a material suspension of or limitation imposed on trading by the Relevant Stock
Exchanges or otherwise relating to securities which then comprise 20% or more of the level of the Index or any Successor Equity Index at any time during the one-hour period that ends at the Close of Trading on
that day, whether by reason of movements in price exceeding limits permitted by those Relevant Stock Exchanges or otherwise. 


  

	 	(B)	 The occurrence or existence of a material suspension of or limitation imposed on trading by any Related
Futures or Options Exchange or otherwise in futures or options contracts relating to the Index or any Successor Equity Index on any Related Futures or Options Exchange at any time during the one-hour period
that 



  
 9 











	 	 
ends at the Close of Trading on that day, whether by reason of movements in price exceeding limits permitted by the Related Futures or Options Exchange or otherwise. 



 

	 	(C)	 The occurrence or existence of any event, other than an early closure, that materially disrupts or impairs the
ability of market participants in general to effect transactions in, or obtain market values for, securities that then comprise 20% or more of the level of the Index or any Successor Equity Index on their Relevant Stock Exchanges at any time during
the one-hour period that ends at the Close of Trading on that day. 


  

	 	(D)	 The occurrence or existence of any event, other than an early closure, that materially disrupts or impairs the
ability of market participants in general to effect transactions in, or obtain market values for, futures or options contracts relating to the Index or any Successor Equity Index on any Related Futures or Options Exchange at any time during the one-hour period that ends at the Close of Trading on that day. 


  

	 	(E)	 The closure on any Exchange Business Day of the Relevant Stock Exchanges on which securities that then
comprise 20% or more of the level of the Index or any Successor Equity Index are traded or any Related Futures or Options Exchange with respect to the Index or any Successor Equity Index prior to its Scheduled Closing Time unless the earlier closing
time is announced by the Relevant Stock Exchange or Related Futures or Options Exchange, as applicable, at least one hour prior to the earlier of (1) the actual closing time for the regular trading session on such Relevant Stock Exchange or
Related Futures or Options Exchange, as applicable, and (2) the submission deadline for orders to be entered into the Relevant Stock Exchange or Related Futures or Options Exchange, as applicable, system for execution at such actual closing
time on that day. 


  

	 	(F)	 The Relevant Stock Exchange for any security underlying the Index or Successor Equity Index or any Related
Futures or Options Exchange with respect to the Index or Successor Equity Index fails to open for trading during its regular trading session. 



For purposes of determining whether a Market Disruption Event has occurred with respect to the Index: 

 

	 	(1)	 the relevant percentage contribution of a security to the level of the Index or any Successor Equity Index
will be based on a comparison of (x) the portion of the level of the Index attributable to that security and (y) the overall level of the Index or Successor Equity Index, in each case immediately before the occurrence of the Market
Disruption Event; 


  

	 	(2)	 the “Close of Trading” on any Trading Day for the Index or any Successor Equity Index means
the Scheduled Closing Time of the Relevant Stock Exchanges with respect to the securities underlying the Index or Successor Equity Index on such 



  
 10 











	 	 
Trading Day; provided that, if the actual closing time of the regular trading session of any such Relevant Stock Exchange is earlier than its Scheduled Closing Time on such Trading Day, then
(x) for purposes of clauses (A) and (C) of the definition of “Market Disruption Event” above, with respect to any security underlying the Index or Successor Equity Index for which such Relevant Stock Exchange is its Relevant
Stock Exchange, the “Close of Trading” means such actual closing time and (y) for purposes of clauses (B) and (D) of the definition of “Market Disruption Event” above, with respect to any futures or options
contract relating to the Index or Successor Equity Index, the “Close of Trading” means the latest actual closing time of the regular trading session of any of the Relevant Stock Exchanges, but in no event later than the Scheduled Closing
Time of the Relevant Stock Exchanges; 


  

	 	(3)	 the “Scheduled Closing Time” of any Relevant Stock Exchange or Related Futures or Options
Exchange on any Trading Day for the Index or any Successor Equity Index means the scheduled weekday closing time of such Relevant Stock Exchange or Related Futures or Options Exchange on such Trading Day, without regard to after hours or any other
trading outside the regular trading session hours; and 


  

	 	(4)	 an “Exchange Business Day” means any Trading Day for the Index or any Successor Equity Index
on which each Relevant Stock Exchange for the securities underlying the Index or any Successor Equity Index and each Related Futures or Options Exchange with respect to the Index or any Successor Equity Index are open for trading during their
respective regular trading sessions, notwithstanding any such Relevant Stock Exchange or Related Futures or Options Exchange closing prior to its Scheduled Closing Time. 



A “Market Disruption Event” with respect to the Fund means any of the following events as determined by the
Calculation Agent in its sole discretion: 
  

	 	(A)	 The occurrence or existence of a material suspension of or limitation imposed on trading by the Relevant Stock
Exchange or otherwise relating to the shares (or other applicable securities) of the Fund or any Successor Fund on the Relevant Stock Exchange at any time during the one-hour period that ends at the Close of
Trading on such day, whether by reason of movements in price exceeding limits permitted by such Relevant Stock Exchange or otherwise. 


  

	 	(B)	 The occurrence or existence of a material suspension of or limitation imposed on trading by any Related
Futures or Options Exchange or otherwise in futures or options contracts relating to the shares (or other applicable securities) of the Fund or any Successor Fund on any Related Futures or Options Exchange at any time during the one-hour period that ends at the Close of Trading on that day, whether by reason of movements in price exceeding limits permitted by the Related Futures or Options Exchange or otherwise. 



 

	 	(C)	 The occurrence or existence of any event, other than an early closure, that materially disrupts or impairs the
ability of market participants in general to effect 



  
 11 











	 	 
transactions in, or obtain market values for, shares (or other applicable securities) of the Fund or any Successor Fund on the Relevant Stock Exchange at any time during the one-hour period that ends at the Close of Trading on that day. 


  

	 	(D)	 The occurrence or existence of any event, other than an early closure, that materially disrupts or impairs the
ability of market participants in general to effect transactions in, or obtain market values for, futures or options contracts relating to shares (or other applicable securities) of the Fund or any Successor Fund on any Related Futures or Options
Exchange at any time during the one-hour period that ends at the Close of Trading on that day. 


  

	 	(E)	 The closure of the Relevant Stock Exchange or any Related Futures or Options Exchange with respect to the Fund
or any Successor Fund prior to its Scheduled Closing Time unless the earlier closing time is announced by the Relevant Stock Exchange or Related Futures or Options Exchange, as applicable, at least one hour prior to the earlier of (1) the
actual closing time for the regular trading session on such Relevant Stock Exchange or Related Futures or Options Exchange, as applicable, and (2) the submission deadline for orders to be entered into the Relevant Stock Exchange or Related
Futures or Options Exchange, as applicable, system for execution at the Close of Trading on that day. 


  

	 	(F)	 The Relevant Stock Exchange or any Related Futures or Options Exchange with respect to the Fund or any
Successor Fund fails to open for trading during its regular trading session. 


 For purposes of
determining whether a market disruption event has occurred with respect to the Fund: 
  

	 	(1)	 “Close of Trading” means the Scheduled Closing Time of the Relevant Stock Exchange with
respect to the Fund or any Successor Fund; and 


  

	 	(2)	 the “Scheduled Closing Time” of the Relevant Stock Exchange or any Related Futures or Options
Exchange on any Trading Day for the Fund or any Successor Fund means the scheduled weekday closing time of such Relevant Stock Exchange or Related Futures or Options Exchange on such Trading Day, without regard to after hours or any other trading
outside the regular trading session hours. 


 Calculation Agent 

The Calculation Agent will determine the Redemption Amount. In addition, the Calculation Agent will (i) determine if
adjustments are required to the Closing Values of the Market Measures under the circumstances described in this Security, (ii) if publication of the Index is discontinued, select a Successor Equity Index or, if no Successor Equity Index is
available, determine the Closing Value of the Index under the circumstances described in this Security, (iii) if the Fund undergoes a Liquidation Event, select a Successor Fund or, if no Successor Fund is available, determine the Closing Value
of the Fund and (iv) determine whether a Market Disruption Event has occurred. 

  
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 The Company covenants that, so long as this Security is Outstanding, there
shall at all times be a Calculation Agent (which shall be a broker-dealer, bank or other financial institution) with respect to this Security. 

All determinations made by the Calculation Agent with respect to this Security will be at the sole discretion of the
Calculation Agent and, in the absence of manifest error, will be conclusive for all purposes and binding on the Company and the Holder of this Security. 

Tax Considerations 

The Company agrees, and by acceptance of a beneficial ownership interest in this Security each Holder of this Security will be
deemed to have agreed (in the absence of a statutory, regulatory, administrative or judicial ruling to the contrary), for United States federal income tax purposes to treat this Security as a prepaid derivative contract that is an “open
transaction.” 
 Redemption and Repayment 

This Security is not subject to redemption at the option of the Company or repayment at the option of the Holder hereof prior
to January 28, 2021. This Security is not entitled to any sinking fund. 
 Acceleration 

If an Event of Default, as defined in the Indenture, with respect to this Security shall occur and be continuing, the
Redemption Amount (calculated as set forth in the next two sentences) of this Security may be declared due and payable in the manner and with the effect provided in the Indenture. The amount payable to the Holder hereof upon any acceleration
permitted under the Indenture will be equal to the Redemption Amount hereof, calculated as provided herein. The Redemption Amount will be calculated as though the date of acceleration was the Calculation Day. 

 
  

Reference is hereby made to the further provisions of this Security set forth on the reverse hereof, which further provisions
shall for all purposes have the same effect as if set forth at this place. 
 Unless the certificate of authentication
hereon has been executed by the Trustee referred to on the reverse hereof by manual signature or its duly authorized agent under the Indenture referred to on the reverse hereof by manual signature, this Security shall not be entitled to any benefit
under the Indenture or be valid or obligatory for any purpose. 

  
 13 










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

					
	WELLS FARGO & COMPANY
		
	By:	 	 
			
		 	Its:	 	 


 [SEAL] 
  

					
	Attest:	 	 
			
		 	Its:	 	 


  

			
	 TRUSTEE’S CERTIFICATE OF

AUTHENTICATION
 This is one of the Securities of the

series designated therein described
 in the within-mentioned Indenture.

	
	 CITIBANK, N.A.,

      as Trustee

		
	By:	 	 
		 	Authorized Signature
	
	OR
	
	 WELLS FARGO BANK, N.A.,

  as Authenticating Agent for the Trustee

		
	By:	 	 
		 	Authorized Signature


  
 14 










 [Reverse of Note] 

WELLS FARGO & COMPANY 

MEDIUM-TERM NOTE, SERIES K 

Due Nine Months or More From Date of Issue 

Principal at Risk Securities Linked to the Lowest Performing of the Russell 2000®
Index 
 and the PowerShares QQQ TrustSM, Series 1 due January 28, 2021

 This Security is one of a duly authorized issue of securities of the Company (herein called the
“Securities”), issued and to be issued in one or more series under an indenture dated as of July 21, 1999, as amended or supplemented from time to time (herein called the “Indenture”), between the Company and
Citibank, N.A., as Trustee (herein called the “Trustee,” which term includes any successor trustee under the Indenture), to which Indenture and all indentures supplemental thereto reference is hereby made for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Holders of the Securities, and of the terms upon which the Securities are, and are to be, authenticated and delivered. This Security is
one of the series of the Securities designated as Medium-Term Notes, Series K, of the Company, which series is limited to an aggregate principal amount or face amount, as applicable, of $25,000,000,000 or the equivalent thereof in one or more
foreign or composite currencies. The amount payable on the Securities of this series may be determined by reference to the performance of one or more equity-, commodity- or currency-based indices, exchange traded funds, securities, commodities,
currencies, statistical measures of economic or financial performance, or a basket comprised of two or more of the foregoing, or any other market measure or may bear interest at a fixed rate or a floating rate. The Securities of this series may
mature at different times, be redeemable at different times or not at all, be repayable at the option of the Holder at different times or not at all and be denominated in different currencies. 

Article Sixteen of the Indenture shall not apply to this Security. 

The Securities are issuable only in registered form without coupons and will be either
(a) book-entry securities represented by one or more Global Securities recorded in the book-entry system maintained by the Depositary or (b) certificated
securities issued to and registered in the names of, the beneficial owners or their nominees. 
 The Company agrees, to the
extent permitted by law, not to voluntarily claim the benefits of any laws concerning usurious rates of interest against a Holder of this Security. 

Modification and Waivers 

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modification of the rights
and obligations of the Company and the rights of the Holders of the Securities of each series to be affected under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in principal amount of the
Securities at the 

  
 15 










 
time Outstanding of all series to be affected, acting together as a class. The Indenture also contains provisions permitting the Holders of a majority in principal amount of the Securities of all
series at the time Outstanding affected by certain provisions of the Indenture, acting together as a class, on behalf of the Holders of all Securities of such series, to waive compliance by the Company with those provisions of the Indenture. Certain
past defaults under the Indenture and their consequences may be waived under the Indenture by the Holders of a majority in principal amount of the Securities of each series at the time Outstanding, on behalf of the Holders of all Securities of such
series. Solely for the purpose of determining whether any consent, waiver, notice or other action or Act to be taken or given by the Holders of Securities pursuant to the Indenture has been given or taken by the Holders of Outstanding Securities in
the requisite aggregate principal amount, the principal amount of this Security will be deemed to be equal to the amount set forth on the face hereof as the “Face Amount” hereof. Any such consent or waiver by the Holder of this Security
shall be conclusive and binding upon such Holder and upon all future Holders of this Security and of any Security issued upon the registration of transfer hereof or in exchange herefor or in lieu hereof, whether or not notation of such consent or
waiver is made upon this Security. 
 Defeasance 

Section 403 and Article Fifteen of the Indenture and the provisions of clause (ii) of Section 401(1)(B) of the
Indenture, relating to defeasance at any time of (a) the entire indebtedness on this Security and (b) certain restrictive covenants and certain Events of Default, upon compliance by the Company with certain conditions set forth therein,
shall not apply to this Security. The remaining provisions of Section 401 of the Indenture shall apply to this Security. 
 Authorized
Denominations 
 This Security is issuable only in registered form without coupons in denominations of $1,000 or any
amount in excess thereof which is an integral multiple of $1,000. 
 Registration of Transfer 

Upon due presentment for registration of transfer of this Security at the office or agency of the Company in the City of
Minneapolis, Minnesota, a new Security or Securities of this series, with the same terms as this Security, in authorized denominations for an equal aggregate Face Amount will be issued to the transferee in exchange herefor, as provided in the
Indenture and subject to the limitations provided therein and to the limitations described below, without charge except for any tax or other governmental charge imposed in connection therewith. 

This Security is exchangeable for definitive Securities in registered form only if (x) the Depositary notifies the
Company that it is unwilling or unable to continue as Depositary for this Security or if at any time the Depositary ceases to be a clearing agency registered under the Securities Exchange Act of 1934, as amended, and a successor depositary is not
appointed within 90 days after the Company receives such notice or becomes aware of such ineligibility, (y) the Company in its sole discretion determines that this Security shall be exchangeable for definitive Securities in registered form
and notifies the Trustee thereof or (z) an Event of Default with respect to the Securities represented hereby has occurred and is continuing. If this Security is exchangeable pursuant to the preceding sentence, it shall be exchangeable for
definitive Securities in registered 

  
 16 










 
form, having the same date of issuance, Stated Maturity Date and other terms and of authorized denominations aggregating a like amount. 

This Security may not be transferred except as a whole by the Depositary to a nominee of the Depositary or by a nominee of the
Depositary to the Depositary or another nominee of the Depositary or by the Depositary or any such nominee to a successor of the Depositary or a nominee of such successor. Except as provided above, owners of beneficial interests in this Global
Security will not be entitled to receive physical delivery of Securities in definitive form and will not be considered the Holders hereof for any purpose under the Indenture. 

Prior to due presentment of this Security for registration of transfer, the Company, the Trustee and any agent of the Company
or the Trustee may treat the Person in whose name this Security is registered as the owner hereof for all purposes, whether or not this Security be overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the
contrary. 
 Obligation of the Company Absolute 

No reference herein to the Indenture and no provision of this Security or the Indenture shall alter or impair the obligation
of the Company, which is absolute and unconditional, to pay the Redemption Amount at the times, place and rate, and in the coin or currency, herein prescribed, except as otherwise provided in this Security. 

No Personal Recourse 

No recourse shall be had for the payment of the Redemption Amount, or for any claim based hereon, or otherwise in respect
hereof, or based on or in respect of the Indenture or any indenture supplemental thereto, against any incorporator, stockholder, officer or director, as such, past, present or future, of the Company or any successor corporation, whether by virtue of
any constitution, statute or rule of law, or by the enforcement of any assessment or penalty or otherwise, all such liability being, by the acceptance hereof and as part of the consideration for the issuance hereof, expressly waived and released.

 Defined Terms 

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

This Security shall be governed by and construed in accordance with the law of the State of New York, without regard to
principles of conflicts of laws. 

  
 17 










 ABBREVIATIONS 

The following abbreviations, when used in the inscription on the face of this instrument, shall be construed as though they
were written out in full according to applicable laws or regulations: 
  

					
	 TEN COM
	 	  -- 
	 	 as tenants in common

			
	 TEN ENT
	 	  -- 
	 	 as tenants by the entireties

			
	 JT TEN
	 	  -- 
	 	 as joint tenants with right

of survivorship and not
 as
tenants in common


  

									
	 UNIF GIFT MIN ACT
	 	  -- 
	 	 	 	 Custodian
	 	 
		 		 	(Cust)	 		 	(Minor)

  

	
	Under Uniform Gifts to Minors Act
	
	   

	(State)

 Additional abbreviations may also be used though not in the above list. 

FOR VALUE RECEIVED, the undersigned hereby sell(s) and transfer(s) unto 

 

	
	 Please Insert Social Security or
 Other
Identifying Number of Assignee

	
	   


  
  

 
  
  

 
 (PLEASE
PRINT OR TYPE NAME AND ADDRESS INCLUDING POSTAL ZIP CODE OF ASSIGNEE)


  
 18 










 the within Security of WELLS FARGO & COMPANY and does hereby irrevocably constitute
and appoint
                                        
attorney to transfer the said Security on the books of the Company, with full power of substitution in the premises. 
 Dated:
                                         
        
  

	
	   



  

	
	   



 NOTICE: The signature to this assignment must correspond with the name as written upon the face of the
within instrument in every particular, without alteration or enlargement or any change whatever. 

  
 19