KARD · Kardigan, Inc.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Mr. Berns serves on the board of directors of the Issuer. Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG. Each of HRTG, Mr. Johnson and Mr. Kelly disclaims beneficial ownership of the securities held directly by HRTG PV, L.P. and HRTG CIF 2024, L.P., except to the extent of such person's pecuniary interest therein, if any.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 1.5928-to-1 basis with no expiration date. All shares of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock automatically converted on a 1.5928-to-1 basis into shares of Common Stock without the payment of additional consideration at the time the Issuer's registration statement on Form S-1 was declared effective by the Securities and Exchange Commission.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG.

Each share of Series A Preferred Stock and Series B Preferred Stock (together the "Preferred Stock") was convertible into Common Stock on a 1.5928 for 1 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any. This report shall not be deemed an admission that he is a beneficial owner of such shares for the purpose of Section 16 of the Exchange Act, or for any other purpose.

Each share of Series A Preferred Stock and Series B Preferred Stock (together the "Preferred Stock") was convertible into Common Stock on a 1.5928 for 1 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any. This report shall not be deemed an admission that he is a beneficial owner of such shares for the purpose of Section 16 of the Exchange Act, or for any other purpose.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

Each share of Series A Preferred Stock and Series B Preferred Stock (together the "Preferred Stock") was convertible into Common Stock on a 1.5928 for 1 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

Represents shares held by AEG 2021 Trust. The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of his pecuniary interest therein, if any. This report shall not be deemed an admission that he is a beneficial owner of such shares for the purpose of Section 16 of the Exchange Act, or for any other purpose.

Each share of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 1.5928-to-1 basis with no expiration date. All shares of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock automatically converted on a 1.5928-to-1 basis into shares of Common Stock without the payment of additional consideration at the time the Issuer's registration statement on Form S-1 was declared effective by the Securities and Exchange Commission.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG.

Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 1.5928-to-1 basis with no expiration date. All shares of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock automatically converted on a 1.5928-to-1 basis into shares of Common Stock without the payment of additional consideration at the time the Issuer's registration statement on Form S-1 was declared effective by the Securities and Exchange Commission.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG.

Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Mr. Berns serves on the board of directors of the Issuer. Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Mr. Berns serves on the board of directors of the Issuer. Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share of Series B Preferred Stock (the "Preferred Stock") was convertible into Common Stock on a 1.5928 for 1 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

Each share of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 1.5928-to-1 basis with no expiration date. All shares of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock automatically converted on a 1.5928-to-1 basis into shares of Common Stock without the payment of additional consideration at the time the Issuer's registration statement on Form S-1 was declared effective by the Securities and Exchange Commission.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

Each share of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 1.5928-to-1 basis with no expiration date. All shares of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock automatically converted on a 1.5928-to-1 basis into shares of Common Stock without the payment of additional consideration at the time the Issuer's registration statement on Form S-1 was declared effective by the Securities and Exchange Commission.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG.

Each share of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 1.5928-to-1 basis with no expiration date. All shares of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock automatically converted on a 1.5928-to-1 basis into shares of Common Stock without the payment of additional consideration at the time the Issuer's registration statement on Form S-1 was declared effective by the Securities and Exchange Commission.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG.

Each share of Series A Preferred Stock and Series B Preferred Stock (together the "Preferred Stock") was convertible into Common Stock on a 1.5928 for 1 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

Represents shares held by KCM 2023 Trust. The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any. This report shall not be deemed an admission that he is a beneficial owner of such shares for the purpose of Section 16 of the Exchange Act, or for any other purpose.

Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

Each share of Series A Preferred Stock and Series B Preferred Stock (together the "Preferred Stock") was convertible into Common Stock on a 1.5928 for 1 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

Represents shares held by KCM 2023 Trust. The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any. This report shall not be deemed an admission that he is a beneficial owner of such shares for the purpose of Section 16 of the Exchange Act, or for any other purpose.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

Each share of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 1.5928-to-1 basis with no expiration date. All shares of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock automatically converted on a 1.5928-to-1 basis into shares of Common Stock without the payment of additional consideration at the time the Issuer's registration statement on Form S-1 was declared effective by the Securities and Exchange Commission.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG.

Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

Each share of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock was convertible into shares of the Issuer's Common Stock on a 1.5928-to-1 basis with no expiration date. All shares of Series A Redeemable Convertible Preferred Stock, Series B Redeemable Convertible Preferred Stock and Series B-1 Redeemable Convertible Preferred Stock automatically converted on a 1.5928-to-1 basis into shares of Common Stock without the payment of additional consideration at the time the Issuer's registration statement on Form S-1 was declared effective by the Securities and Exchange Commission.

HRTG GPE, LLC ("HRTG") is the general partner of each of HRTG PV, L.P. and HRTG CIF 2024, L.P. Keith Johnson and Kevin Kelly each serve as a Managing Member of HRTG.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

The shares subject to this option shall vest and become exercisable in thirty-six (36) equal monthly installments commencing from June 17, 2026, subject to the Reporting Person's continued service on each such vesting date.

Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share of Series A Preferred Stock and Series B Preferred Stock (together the "Preferred Stock") was convertible into Common Stock on a 1.5928 for 1 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

Represents shares held by AEG 2021 Trust. The Reporting Person disclaims beneficial ownership of such shares for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of his pecuniary interest therein, if any. This report shall not be deemed an admission that he is a beneficial owner of such shares for the purpose of Section 16 of the Exchange Act, or for any other purpose.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to the Reporting Person's continuous service as of the applicable vesting date.

Each share is represented by a restricted stock unit ("RSU"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock upon settlement. The RSUs vest in full on June 17, 2028, subject to Douglas E. Giordano's ("Mr. Giordano") continuous service as of the applicable vesting date.

Mr. Giordano is a Managing Director and Co-Head of Capital Solutions at Perceptive Advisors LLC (the "Advisor"). The Advisor serves as the investment manager of Perceptive Life Sciences Master Fund Ltd. (the "Master Fund"). Perceptive Capital Solutions Advisors LP ("PCS Advisors", together with the Advisor, the "Advisors"), a relying adviser of the Advisor, serves as the investment manager to Perceptive Capital Solutions Holdings LP ("PCS Holdings"), and Perceptive Capital Solutions GP LLC ("PCS GP") serves as the general partner of PCS Holdings. Mr. Edelman is the managing member of PCS GP and the Advisor.

The Advisors may be deemed to have an indirect pecuniary interest in the options reported herein because the Advisors have the right to receive the director compensation attributable to Mr. Giordano's board service through a partial management fee offset. Each of Mr. Edelman, the Master Fund, PCS Holdings, and the Advisors disclaims, for purposes of Section 16 of the Securities Exchange Act of 1934, beneficial ownership of such securities, except to the extent of his or its indirect pecuniary interest therein, and this report shall not be deemed an admission that any of Mr. Edelman, the Master Fund, PCS Holdings, or the Advisors is the beneficial owner of such securities for purposes of Section 16 or for any other purpose.

Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Mr. Berns serves on the board of directors of the Issuer. Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.

These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Mr. Berns serves on the board of directors of the Issuer. Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.

Each share of Series B Preferred Stock (the "Preferred Stock") was convertible into Common Stock on a 1.5928 for 1 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.