Form: SCHEDULE 13D/A

General Statement of Acquisition of Beneficial Ownership

August 7, 2026






If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




schemaVersion:


SCHEDULE 13D




Comment for Type of Reporting Person:
Consists of (i) 315,415 shares of Class A common stock, par value $0.0001 per share ("Class A Common Stock") and (ii) 37,342,994 shares of Class B common stock, par value $0.0001 per share ("Class B Common Stock") of the Issuer. The rights of the holders of Class A Common Stock and Class B Common Stock are generally identical, except with respect to voting and conversion. Each share of Class A Common Stock is entitled to one vote per share. Each share of Class B Common Stock is entitled to ten votes per share and is convertible at the election of the holder into one share of Class A Common Stock. In addition, each share of Class B Common Stock will be automatically converted into one share of Class A Common Stock upon the occurrence of certain events as set forth in the Issuer's certificate of incorporation. Pursuant to Rule 13d-3 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), the percent of class was calculated based on (i) 1,708,146,085 shares of Class A Common Stock outstanding as of July 22, 2026, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on July 29, 2026, and (ii) the shares of Class B Common Stock of the Issuer beneficially owned by the Reporting Person (with such shares treated as converted into shares of Class A Common Stock only for purposes of computing the percentage ownership of the Reporting Person pursuant to the Exchange Act).


SCHEDULE 13D




Comment for Type of Reporting Person:
Consists of (i) 4,803 shares of Class A Common Stock and (ii) 568,654 shares of Class B Common Stock of the Issuer. The rights of the holders of Class A Common Stock and Class B Common Stock are generally identical, except with respect to voting and conversion. Each share of Class A Common Stock is entitled to one vote per share. Each share of Class B Common Stock is entitled to ten votes per share and is convertible at the election of the holder into one share of Class A Common Stock. In addition, each share of Class B Common Stock will be automatically converted into one share of Class A Common Stock upon the occurrence of certain events as set forth in the Issuer's certificate of incorporation. Pursuant to Rule 13d-3 of the Exchange Act, the percent of class was calculated based on (i) 1,708,146,085 shares of Class A Common Stock outstanding as of July 22, 2026, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on July 29, 2026, and (ii) the shares of Class B Common Stock of the Issuer beneficially owned by the Reporting Person (with such shares treated as converted into shares of Class A Common Stock only for purposes of computing the percentage ownership of the Reporting Person pursuant to the Exchange Act).


SCHEDULE 13D




Comment for Type of Reporting Person:
Consists of (i) 320,218 shares of Class A Common Stock and (ii) 37,911,648 shares of Class B Common Stock of the Issuer. The rights of the holders of Class A Common Stock and Class B Common Stock are generally identical, except with respect to voting and conversion. Each share of Class A Common Stock is entitled to one vote per share. Each share of Class B Common Stock is entitled to ten votes per share and is convertible at the election of the holder into one share of Class A Common Stock. In addition, each share of Class B Common Stock will be automatically converted into one share of Class A Common Stock upon the occurrence of certain events as set forth in the Issuer's certificate of incorporation. Pursuant to Rule 13d-3 of the Exchange Act, the percent of class was calculated based on (i) 1,708,146,085 shares of Class A Common Stock outstanding as of July 22, 2026, as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on July 29, 2026, and (ii) the shares of Class B Common Stock of the Issuer beneficially owned by the Reporting Person (with such shares treated as converted into shares of Class A Common Stock only for purposes of computing the percentage ownership of the Reporting Person pursuant to the Exchange Act).


SCHEDULE 13D


 
Index Ventures Growth III (Jersey), L.P.
 
Signature:/s/ Nigel Greenwood
Name/Title:Director of General Partner
Date:08/07/2026
 
Yucca (Jersey) SLP
 
Signature:/s/ Nigel Greenwood
Name/Title:Authorised Signatory
Date:08/07/2026
 
Index Venture Growth Associates III Limited
 
Signature:/s/ Nigel Greenwood
Name/Title:Director
Date:08/07/2026