STUB

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.00 to $14.01. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.00 to $14.01. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.00 to $13.16. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.00 to $13.06. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Represents an award of restricted stock units ("RSUs"). The RSUs vest in twelve substantially equal monthly installments beginning on July 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2026.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.00 to $13.10. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.00 to $13.14. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2026.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.00 to $12.16. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

The option is fully vested.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations and to pay the exercise price of the option. Not a market sale.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 15, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.20 to $11.59. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.01 to $10.50. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

Represents an award of RSUs. The RSUs vest in four substantially equal quarterly installments beginning on March 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

Represents an award of restricted stock units ("RSUs"). The RSUs vest in six substantially equal quarterly installments beginning on March 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

Represents an award of restricted stock units ("RSUs"). The RSUs will vest in substantially equal quarterly installments over a four year period beginning on March 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

Represents an award of restricted stock units ("RSUs"). The RSUs vest in four substantially equal quarterly installments beginning on March 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

Represents an award of restricted stock units ("RSUs"). The RSUs vest in six substantially equal quarterly installments beginning on March 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.00 to $9.16. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Represents an award of restricted stock units ("RSUs"), which vested in full upon the grant date.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.52 to $7.68. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Represents an award of RSUs, of which 15,353 RSUs vested upon the grant date. Approximately 75% of the remaining RSUs will vest in four substantially equal monthly installments beginning on June 1, 2026 and approximately 25% of the remaining RSUs will vest in three substantially equal monthly installments beginning on October 1, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on December 10, 2025.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.17 to $6.58. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

These shares were withheld by the Company to satisfy the reporting person's tax withholding obligations. Not a market sale.

Represents an award of restricted stock units ("RSUs"), which vests in four substantially equal quarterly installments beginning on March 31, 2026. Each RSU represents a contingent right to receive one share of Issuer Class A common stock.

This transaction represents a pro-rata in-kind distribution by WestCap Stub Holdco 2024, LLC ("WestCap Stub") and WestCap StubHub Opportunity Fund Preferred, LLC ("WestCap StubHub") to their members for no consideration.

The securities are held directly by WestCap Stub and WestCap StubHub.

WestCap Management, LLC is the managing member of WestCap Stub and WestCap StubHub. Laurence A. Tosi may be deemed to hold voting and investment control over the shares held by WestCap Stub and WestCap StubHub. Each Reporting Person expressly disclaims beneficial ownership of the securities reported herein except to the extent of its or his pecuniary interest therein, if any.

Each share of redeemable preferred stock automatically converted into shares of Class A common stock of the Issuer, pursuant to the terms as specified in the Issuer's Certificate of Designation.

Deer VIII & Co. L.P. ("Deer VIII LP") is the general partner of Bessemer Venture Partners VIII L.P. ("BVP VIII") and Bessemer Venture Partners VIII Institutional L.P. ("BVP VIII Inst"). Deer VIII & Co. Ltd. ("Deer VIII Ltd.") is the general partner of Deer VIII LP. Robert P. Goodman, David Cowan, Scott Ring, Sandra Grippo, Jeremy Levine, Byron Deeter and Robert M. Stavis serve as the directors of Deer VIII Ltd. and are the individuals who make investment and voting decisions on behalf of BVP VIII and BVP VIII Inst., collectively. Investment and voting decisions with respect to our shares held by BVP VIII and BVP VIII Inst are made by the directors of Deer VIII Ltd. acting as an investment committee. Deer X & Co. L.P. ("Deer X LP") is the general partner of Bessemer Venture Partners Century Fund L.P. ("BVP CF") and Bessemer Venture Partners Century Fund Institutional L.P. ("BVP CF Inst"). Deer X & Co. Ltd. ("Deer X Ltd.") is the general partner of Deer X LP. Robert P. Goodman,

(Continued from footnote 2) David Cowan, Jeremy Levine, Byron Deeter, Adam Fisher, Brian Feinstein, Alex Ferrara, Stephen Kraus, Scott Ring and Sandra Grippo are the directors of Deer X Ltd. and are the individuals who make investment and voting decisions on behalf of BVP CF and BVP CF Inst., collectively. Investment and voting decisions with respect to our shares held by BVP CF and BVP CF Inst are made by the directors of Deer X Ltd. acting as an investment committee. by Deer Partners Investment Fund LLC ("DPIF") is a member-managed LLC. Voting and investment decisions over our shares held by DPIF are made by members of DPIF holding a majority in interests of DPIF's position in us. Certain affiliates of the Bessemer Entities own a material interest in Cloud All Star Fund GP, LLC, the general partner of Cloud All Star Fund, L.P. ("CASF"), which has voting and dispositive power with respect to the shares held by CASF.

(Continued from footnote 3) The Reporting Person is a Partner at Bessemer Venture Partners may be deemed to have shared voting and investment power over the shares held by BVP VIII, BVP VIII Inst, BVP CF Inst, BVP CF, DPIF and CASF (as defined above). The Reporting Person disclaims beneficial ownership interest of the securities held by BVP VIII, BVP VIII Inst, BVP CF Inst, BVP CF, DPIF and CASF, except to the extent of his pecuniary interest, if any, in such securities by virtue of his indirect and/or direct interest in such entities.

The Series O Preferred Stock automatically converted into Class A Common Stock, par value $0.001 per share ("Class A Common Stock") on March 17, 2026, the date that is 180 days after the closing on September 18, 2025 of the issuer's initial public offering.

The Series O Preferred Stock had no stated maturity.

The securities reported on this line were held directly by WestCap StubHub.

WestCap Management, LLC ("WestCap") is the managing member of WestCap Stub and WestCap StubHub. Laurence A. Tosi may be deemed to hold voting and investment control over the shares held by WestCap Stub and WestCap StubHub. Each Reporting Person expressly disclaims beneficial ownership of the securities reported herein except to the extent of its or his pecuniary interest therein, if any.