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Amended & Restated 2021 Stock Plan

General. Our board of directors adopted our 2021 Plan on January 28, 2021 and last amended our 2021 Plan 
effective as of May 28, 2026. Our 2021 Plan will be terminated effective as of the day immediately prior to the 
day the registration statement of which this prospectus forms a part becomes effective, and no new awards will 
be  granted  under  our  2021  Plan  following  this  offering,  but  previously  granted  awards  will  continue  to  be 
subject to the terms and conditions of our 2021 Plan and the award agreements evidencing such awards.

Share Reserve. We have reserved for issuance pursuant to our 2021 Plan an aggregate of 3,864,826,090 shares 
of our Class A common stock. In general, if an award granted under our 2021 Plan (i) expires or is terminated, 
cancelled, or otherwise forfeited by a participant, (ii) a share subject to an award is withheld in satisfaction of 
the exercise price and/or tax withholding due in connection with such award, or (iii) a share previously issued 
pursuant  to  an  award  is  forfeited  or  repurchased  at  the  original  purchase  price  paid  for  the  share,  then  the 
number of unissued shares subject to any such award, and any such withheld, forfeited, or repurchased shares, 
will again become available for awards under our 2021 Plan. Following the effectiveness of our 2026 Plan, such 
shares will again become available for awards under our 2026 Plan.

Plan Administration. Our board of directors has administered our 2021 Plan before this offering. Our board of 
directors has delegated its authority to administer our 2021 Plan to our compensation committee following this 
offering.

Types of Awards. Our 2021 Plan provides for incentive and non-statutory stock options to purchase shares of 
our Class A common stock, RSAs, and RSUs. As of the date of this prospectus, we have issued stock options, 
restricted stock, and RSUs pursuant to our 2021 Plan.

Non-transferability of Awards. Unless the administrator provides otherwise, our 2021 Plan generally does not 
allow for the transfer of awards other than by will or the laws of descent and distribution and only the recipient 
of an option right may exercise such an award during their lifetime.

Certain  Adjustments.  In  the  event  of  certain  corporate  events  or  changes  in  our  capitalization,  to  prevent 
diminution  or  enlargement  of  the  benefits  or  potential  benefits  available  under  our  2021  Plan,  the 
administrator will make adjustments to one or more of the number, kind, and class of securities that may be 
delivered  under  our  2021  Plan  and/or  the  number,  kind,  class,  and  price  of  securities  covered  by  each 
outstanding award.

Corporate Transaction. Our 2021 Plan provides that in the event of (i) a transfer of all or substantially all of our 
assets,  (ii)  a  merger,  consolidation,  or  other  capital  reorganization  or  business  combination  transaction  of  us 
with  or  into  another  corporation,  entity,  or  person,  or  (iii)  the  consummation  of  a  transaction,  or  series  of 
related transactions, in which any “person” becomes the “beneficial owner,” directly or indirectly, of more than 
50% of our then outstanding capital stock (each, a “Corporate Transaction”), the administrator may, in its sole 
and  absolute  discretion  and  without  the  need  for  the  consent  of  any  participant,  take  one  or  more  of  the 
following  actions  contingent  upon  the  occurrence  of  that  Corporate  Transaction  with  respect  to  outstanding 
awards granted under our 2021 Plan which provide for: (A) the continuation of such awards by us (if we are the 
surviving  corporation);  (B)  the  assumption  of  such  awards  by  the  surviving  corporation  or  its  parent;  (C)  the 
substitution by the surviving corporation or its parent of new options or equity awards for such awards; (D) the 
cancellation  of  such  awards  in  exchange  for  a  payment  to  the  participants  equal  to  the  excess  of  (1)  the  fair 
market value of the shares or units subject to such awards as of the closing date of such Corporate Transaction 
over  (2)  the  exercise  price  or  purchase  price  paid  or  to  be  paid  for  the  shares  or  units  representing  shares 
subject to the awards, as applicable; or (E) the cancellation of any outstanding awards or an outstanding right 
to purchase restricted stock, in either case, for no consideration. 

Amendment or Termination. Our board of directors may amend or terminate our 2021 Plan at any time. If our 
board  of  directors  amends  our  2021  Plan,  we  will  ask  our  stockholders  to  approve  the  amendment  if  such 
approval  is  necessary  or  desirable  to  comply  with  applicable  law.  No  further  awards  will  be  made  under  our 
2021 Plan after this offering.

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