Sec Form 3 Filing - Warburg Pincus Capital Corp I-B Sponsor, L.P. @ Warburg Pincus Capital Corp I-B - 2021-03-04

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Warburg Pincus Capital Corp I-B Sponsor, L.P. 2. Issuer Name and Ticker or Trading Symbol Warburg Pincus Capital Corp I-B [ WPCB] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 450 LEXINGTON AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 03/04/2021 (Street) NEW YORK, NY10017 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Class B ordinary shares ( 1 ) ( 1 ) ( 1 ) Class A ordinary shares 14,340,000 ( 2 ) D ( 3 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Warburg Pincus Capital Corp I-B Sponsor, L.P. 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Warburg Pincus Capital Corp GP LLC 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Warburg Pincus Partners II (Cayman), L.P. 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Warburg Pincus (Bermuda) Private Equity GP Ltd. 450 LEXINGTON AVENUE NEW YORK, NY10017 X X Signatures See signatures included in Exhibit 99.1 03/04/2021 Signature of Reporting Person Date

Explanation of Responses:

( 1 )As described in the issuer's registration statement on Form S-1 (File No. 333-253212) under the heading "Description of Securities-Founder Shares", the Class B ordinary shares, par value $0.0001 (the "Class B Shares"), will automatically convert into Class A ordinary shares, par value $0.0001, of the issuer at the time of the issuer's initial business combination transaction on a one-for-one basis, subject to adjustment for share splits, share capitalizations, reorganizations, recapitalizations and the like, and certain anti-dilution rights and have no expiration date. ( 2 )The Class B Shares owned by the reporting person include up to 1,875,000 shares that are subject to forfeiture to the extent the underwriters of the initial public offering of the issuer's securities do not exercise in full their over-allotment option as described in the issuer's registration statement. ( 3 )The reporting person is controlled by Warburg Pincus Capital Corporation GP LLC ("GP"), its general partner. Warburg Pincus Partners II (Cayman), L.P. ("LP") is the managing member of GP and may be deemed to have or share beneficial ownership of the Class B Shares. Warburg Pincus (Bermuda) Private Equity GP Ltd. is the general partner of LP and may be deemed to have or share beneficial ownership of the Class B Shares.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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