X0206 3 2021-08-03 0 0001854863 Blue Whale Acquisition Corp I BWCA 0001215493 PILLAR RUSSELL I PO BOX 1093, BOUNDARY HALL CRICKET SQUARE GRAND CAYMAN E9 KY1-1102 CAYMAN ISLANDS 0 1 0 0 Chief Financial Officer Class F ordinary shares 0.00 Class A ordinary shares 9600 D As described in the issuer's registration statement on Form S-1 (File No. 333-257816) under the heading "Description of Securities--Founder Shares," on the first business day following the closing of the issuer's initial business combination, the Class F ordinary shares will automatically convert into a number of Class A ordinary shares at a ratio such that the number of Class A ordinary shares issuable upon conversion of all Class F ordinary shares will equal, in the aggregate on an as-converted basis, equal to 10% of the sum of (i) the total number of all Class A ordinary shares issued and outstanding upon completion of this the issuer's initial public offering ("IPO") (including any over-allotment shares if the underwriters exercise their over-allotment option and without giving effect to any redemptions of any public shares in connection with the initial business combination), (Continued from Footnote 1) plus (ii) the total number of Class A ordinary shares issued or deemed issued or issuable upon conversion of the Class F founder ordinary shares, plus (iii) unless waived by Blue Whale Sponsor I LLC, the total number of Class A ordinary shares or equity-linked securities exercisable for or convertible into Class A ordinary shares issued, deemed issued, or to be issued, in connection with or in relation to the consummation of the initial business combination, (Continued from Footnote 2) including any forward purchase shares, and excluding (x) any Class A ordinary shares or equity-linked securities exercisable for or convertible into Class A ordinary shares issued, deemed issued, or to be issued, to any seller in the initial business combination and (y) any Class A ordinary shares issuable upon conversion of the Class G founder shares. If calculated based on the public shares outstanding as of immediately after the IPO, the Class F ordinary shares would be convertible (on the first day following the completion of our the issuer's business combination) into an aggregate of 2,222,222 Class A ordinary shares (assuming no exercise of the over-allotment option). /s/ Pillar, Russ 2021-08-03