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Convertible  Notes  Conversion,  Class  F  Stock  Issuance,  Initial  Public  Benefit  Issuance,  and  RSU  Settlement), 
and excludes: 

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           shares of our Class A common stock issuable upon the exercise of options to purchase shares of 
our  Class  A  common  stock  outstanding  as  of  September  30,  2026,  with  a  weighted-average  exercise 
price of $           per share; 

                     shares  of  our  Class  A  common  stock  issuable  upon  the  vesting  and  settlement  of  RSUs 
outstanding as of the date of this prospectus, but for which (i) the service-based vesting condition was 
not  satisfied  as  of  such  date  and  (ii)  the  performance-based  vesting  condition,  if  applicable,  will  be 
satisfied upon the effectiveness of the registration statement of which this prospectus forms a part; 

           shares of our Class A common stock issued after September 30, 2026 in connection with our 
acquisitions of  privately-held companies; and

           shares of our Class A common stock reserved for future issuance under our equity compensation 
plans, consisting of: 

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           shares of our Class A common stock reserved for future issuance upon conversion of Class N 
common stock issuable under our Donation Matching Plan;

           shares of our Class A common stock to be reserved for future issuance under our 2026 Plan, 
which will become effective prior to the completion of this offering; 

           shares of our Class A common stock reserved for future issuance under our 2021 Plan, which 
number of shares will be added to the shares of our Class A common stock to be reserved for future 
issuance under our 2026 Plan upon its effectiveness, at which time we will cease granting awards 
under our 2021 Plan; and

                     shares  of  our  Class  A  common  stock  to  be  reserved  for  future  issuance  under  our  ESPP, 
which will become effective prior to the completion of this offering.

Our 2026 Plan and ESPP each provide for an annual automatic increase in the number of shares of our Class A 
common stock reserved thereunder, and our 2026 Plan provides for increases to the number of shares that may 
be  granted  thereunder  based  on  awards  under  our  2021  Plan  that  expire  or  are  cancelled  or  forfeited,  and 
shares  under  our  2021  Plan  that  are  tendered  to  or  withheld  by  us  for  payment  of  an  exercise  price  or  for 
satisfying tax withholding obligations, or are forfeited or otherwise repurchased by us, as more fully described 
in the section titled “Executive Compensation—Equity Plans.” 

To  the  extent  that  any  outstanding  options  to  purchase  our  Class  A  common  stock  are  exercised,  RSUs  are 
settled  or  new  awards  are  granted  under  our  equity  compensation  plans,  there  will  be  further  dilution  to 
investors participating in this offering. 

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