LTGO

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · derivative · entry 15

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 195,776 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F5 · kind: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F5 · price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F5 · derivative.exercise_date: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F5 · derivative.expiration_date: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI LP ("Fund VI"). Foresite Capital Management VI, LLC ("FCM VI") is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Tananbaum is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · derivative · entry 14

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 296,880 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F4 · ownership.nature: The securities are held of record by Foresite Capital Opportunity Fund V, L.P. ("Opportunity Fund V"). Foresite Capital Opportunity Management V, LLC ("FCOM V") is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. Tananbaum is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · derivative · entry 13

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,117,664 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F4 · ownership.nature: The securities are held of record by Foresite Capital Opportunity Fund V, L.P. ("Opportunity Fund V"). Foresite Capital Opportunity Management V, LLC ("FCOM V") is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. Tananbaum is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · derivative · entry 12

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 742,201 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI LP ("Fund VI"). Foresite Capital Management VI, LLC ("FCM VI") is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Tananbaum is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · derivative · entry 11

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 1,125,823 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI LP ("Fund VI"). Foresite Capital Management VI, LLC ("FCM VI") is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Tananbaum is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · derivative · entry 10

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 445,320 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F2 · ownership.nature: The securities are held of record by Foresite Capital Fund V, L.P. ("Fund V"). Foresite Capital Management V, LLC ("FCM V") is the general partner of Fund V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. James B. Tananbaum (Tananbaum) is the sole managing member of FCM V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · derivative · entry 9

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,117,664 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F2 · ownership.nature: The securities are held of record by Foresite Capital Fund V, L.P. ("Fund V"). Foresite Capital Management V, LLC ("FCM V") is the general partner of Fund V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. James B. Tananbaum (Tananbaum) is the sole managing member of FCM V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · nonDerivative · entry 8

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 3,414,544

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F4 · ownership.nature: The securities are held of record by Foresite Capital Opportunity Fund V, L.P. ("Opportunity Fund V"). Foresite Capital Opportunity Management V, LLC ("FCOM V") is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. Tananbaum is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · nonDerivative · entry 7

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 3,117,664

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F4 · ownership.nature: The securities are held of record by Foresite Capital Opportunity Fund V, L.P. ("Opportunity Fund V"). Foresite Capital Opportunity Management V, LLC ("FCOM V") is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. Tananbaum is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · nonDerivative · entry 6

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 2,203,800

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F5 · price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI LP ("Fund VI"). Foresite Capital Management VI, LLC ("FCM VI") is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Tananbaum is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · nonDerivative · entry 5

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 2,008,024

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI LP ("Fund VI"). Foresite Capital Management VI, LLC ("FCM VI") is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Tananbaum is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · nonDerivative · entry 4

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 1,868,024

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI LP ("Fund VI"). Foresite Capital Management VI, LLC ("FCM VI") is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Tananbaum is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · nonDerivative · entry 3

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 1,125,823

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI LP ("Fund VI"). Foresite Capital Management VI, LLC ("FCM VI") is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Tananbaum is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · nonDerivative · entry 2

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 3,562,984

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F2 · ownership.nature: The securities are held of record by Foresite Capital Fund V, L.P. ("Fund V"). Foresite Capital Management V, LLC ("FCM V") is the general partner of Fund V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. James B. Tananbaum (Tananbaum) is the sole managing member of FCM V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093580 · tm2622773-1_4seq1.xml · nonDerivative · entry 1

Foresite Capital Management V, LLC · CIK 0001792206 · 10% owner

Foresite Capital Fund V, L.P. · CIK 0001792204 · 10% owner

Foresite Capital Opportunity Management V, LLC · CIK 0001792207 · 10% owner

Foresite Capital Opportunity Fund V, L.P. · CIK 0001792205 · 10% owner

Foresite Capital Management VI LLC · CIK 0002013341 · 10% owner

Foresite Capital Fund VI LP · CIK 0001932516 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 3,117,664

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: Each share of the Issuer's preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F2 · ownership.nature: The securities are held of record by Foresite Capital Fund V, L.P. ("Fund V"). Foresite Capital Management V, LLC ("FCM V") is the general partner of Fund V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. James B. Tananbaum (Tananbaum) is the sole managing member of FCM V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. Each of the Reporting Persons disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · derivative · entry 14

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 165,519 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · derivative.exercise_date: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · derivative.expiration_date: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. (Fund II). The general partner of Fund II is Westlake BioPartners GP II, LLC (GP II). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. The Reporting Person is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · derivative · entry 13

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 2,066,857 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F5 · ownership.nature: Shares held directly by Westlake BioPartners Opportunity Fund I, L.P. (Opportunity Fund). The general partner of Opportunity Fund is Westlake BioPartners Opportunity GP I, LLC (Opportunity GP). Opportunity GP may be deemed to share voting and dispositive power with regard to the shares held directly by Opportunity Fund. The Reporting Person is the sole managing director of Opportunity GP and has voting and dispositive power over the shares held by Opportunity Fund. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · derivative · entry 12

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 1,484,401 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. (Fund II). The general partner of Fund II is Westlake BioPartners GP II, LLC (GP II). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. The Reporting Person is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · derivative · entry 11

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,464,072 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. (Fund II). The general partner of Fund II is Westlake BioPartners GP II, LLC (GP II). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. The Reporting Person is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · derivative · entry 10

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 1,027,635 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F2 · ownership.nature: Shares held directly by Westlake BioPartners Fund I, L.P. (Fund I). The general partner of Fund I is Westlake BioPartners GP I, LLC (GP I). GP I may be deemed to share voting and dispositive power with regard to the shares held directly by Fund I. The Reporting Person is the sole managing director of GP I and has voting and dispositive power over the shares held by Fund I. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · derivative · entry 9

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,547,842 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F2 · ownership.nature: Shares held directly by Westlake BioPartners Fund I, L.P. (Fund I). The general partner of Fund I is Westlake BioPartners GP I, LLC (GP I). GP I may be deemed to share voting and dispositive power with regard to the shares held directly by Fund I. The Reporting Person is the sole managing director of GP I and has voting and dispositive power over the shares held by Fund I. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · derivative · entry 8

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 938,979 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F2 · ownership.nature: Shares held directly by Westlake BioPartners Fund I, L.P. (Fund I). The general partner of Fund I is Westlake BioPartners GP I, LLC (GP I). GP I may be deemed to share voting and dispositive power with regard to the shares held directly by Fund I. The Reporting Person is the sole managing director of GP I and has voting and dispositive power over the shares held by Fund I. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · nonDerivative · entry 7

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 2,094,813

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F5 · ownership.nature: Shares held directly by Westlake BioPartners Opportunity Fund I, L.P. (Opportunity Fund). The general partner of Opportunity Fund is Westlake BioPartners Opportunity GP I, LLC (Opportunity GP). Opportunity GP may be deemed to share voting and dispositive power with regard to the shares held directly by Opportunity Fund. The Reporting Person is the sole managing director of Opportunity GP and has voting and dispositive power over the shares held by Opportunity Fund. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · nonDerivative · entry 6

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 5,160,847

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. (Fund II). The general partner of Fund II is Westlake BioPartners GP II, LLC (GP II). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. The Reporting Person is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · nonDerivative · entry 5

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 4,995,328

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. (Fund II). The general partner of Fund II is Westlake BioPartners GP II, LLC (GP II). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. The Reporting Person is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · nonDerivative · entry 4

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 3,510,927

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. (Fund II). The general partner of Fund II is Westlake BioPartners GP II, LLC (GP II). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. The Reporting Person is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · nonDerivative · entry 3

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 5,944,009

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F2 · ownership.nature: Shares held directly by Westlake BioPartners Fund I, L.P. (Fund I). The general partner of Fund I is Westlake BioPartners GP I, LLC (GP I). GP I may be deemed to share voting and dispositive power with regard to the shares held directly by Fund I. The Reporting Person is the sole managing director of GP I and has voting and dispositive power over the shares held by Fund I. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · nonDerivative · entry 2

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 4,916,374

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F2 · ownership.nature: Shares held directly by Westlake BioPartners Fund I, L.P. (Fund I). The general partner of Fund I is Westlake BioPartners GP I, LLC (GP I). GP I may be deemed to share voting and dispositive power with regard to the shares held directly by Fund I. The Reporting Person is the sole managing director of GP I and has voting and dispositive power over the shares held by Fund I. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001184592-26-000005 · form4-08102026_080801.xml · nonDerivative · entry 1

SEIDENBERG BETH C · CIK 0001184592 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,368,532

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F2 · ownership.nature: Shares held directly by Westlake BioPartners Fund I, L.P. (Fund I). The general partner of Fund I is Westlake BioPartners GP I, LLC (GP I). GP I may be deemed to share voting and dispositive power with regard to the shares held directly by Fund I. The Reporting Person is the sole managing director of GP I and has voting and dispositive power over the shares held by Fund I. The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · derivative · entry 15

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 195,776 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · derivative.exercise_date: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · derivative.expiration_date: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI, LP (Fund VI). Foresite Capital Management VI, LLC (FCM VI) is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. The Reporting Person is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of Fund VI, FCM VI and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · derivative · entry 14

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 296,880 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F5 · ownership.nature: The securities are held of record by Foresite Capital Opportunity Fund V, L.P. (Opportunity Fund V). Foresite Capital Opportunity Management V, LLC (FCOM V) is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. The Reporting Person is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of Opportunity Fund V, FCOM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · derivative · entry 13

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,117,664 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F5 · ownership.nature: The securities are held of record by Foresite Capital Opportunity Fund V, L.P. (Opportunity Fund V). Foresite Capital Opportunity Management V, LLC (FCOM V) is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. The Reporting Person is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of Opportunity Fund V, FCOM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · derivative · entry 12

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 742,201 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI, LP (Fund VI). Foresite Capital Management VI, LLC (FCM VI) is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. The Reporting Person is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of Fund VI, FCM VI and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · derivative · entry 11

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 1,125,823 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI, LP (Fund VI). Foresite Capital Management VI, LLC (FCM VI) is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. The Reporting Person is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of Fund VI, FCM VI and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · derivative · entry 10

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 445,320 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F2 · ownership.nature: The securities are held of record by Foresite Capital Fund V, L.P. (Fund V). Foresite Capital Management V, LLC (FCM V) is the general partner of Fund V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. The Reporting Person is the sole managing member of FCM V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. Each of Fund V, FCM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · derivative · entry 9

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,117,664 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.exercise_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F1 · derivative.expiration_date: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F2 · ownership.nature: The securities are held of record by Foresite Capital Fund V, L.P. (Fund V). Foresite Capital Management V, LLC (FCM V) is the general partner of Fund V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. The Reporting Person is the sole managing member of FCM V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. Each of Fund V, FCM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · nonDerivative · entry 8

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 3,414,544

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F5 · ownership.nature: The securities are held of record by Foresite Capital Opportunity Fund V, L.P. (Opportunity Fund V). Foresite Capital Opportunity Management V, LLC (FCOM V) is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. The Reporting Person is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of Opportunity Fund V, FCOM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · nonDerivative · entry 7

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 3,117,664

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F5 · ownership.nature: The securities are held of record by Foresite Capital Opportunity Fund V, L.P. (Opportunity Fund V). Foresite Capital Opportunity Management V, LLC (FCOM V) is the general partner of Opportunity Fund V and may be deemed to have sole voting and dispositive power over the shares held by Opportunity Fund V. The Reporting Person is the sole managing member of FCOM V and may be deemed to have sole voting and dispositive power over the securities held by Opportunity Fund V. Each of Opportunity Fund V, FCOM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · nonDerivative · entry 6

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 2,203,800

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · price: Reflects a convertible note that is convertible into shares of Common Stock of the Issuer. The convertible note has a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI, LP (Fund VI). Foresite Capital Management VI, LLC (FCM VI) is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. The Reporting Person is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of Fund VI, FCM VI and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · nonDerivative · entry 5

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 2,008,024

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI, LP (Fund VI). Foresite Capital Management VI, LLC (FCM VI) is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. The Reporting Person is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of Fund VI, FCM VI and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · nonDerivative · entry 4

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,868,024

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI, LP (Fund VI). Foresite Capital Management VI, LLC (FCM VI) is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. The Reporting Person is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of Fund VI, FCM VI and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · nonDerivative · entry 3

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,125,823

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F3 · ownership.nature: The securities are held of record by Foresite Capital Fund VI, LP (Fund VI). Foresite Capital Management VI, LLC (FCM VI) is the general partner of Fund VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. The Reporting Person is the sole managing member of FCM VI and may be deemed to have sole voting and dispositive power over the securities held by Fund VI. Each of Fund VI, FCM VI and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · nonDerivative · entry 2

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 3,562,984

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F2 · ownership.nature: The securities are held of record by Foresite Capital Fund V, L.P. (Fund V). Foresite Capital Management V, LLC (FCM V) is the general partner of Fund V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. The Reporting Person is the sole managing member of FCM V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. Each of Fund V, FCM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001581754-26-000006 · form4-08102026_080804.xml · nonDerivative · entry 1

Tananbaum James B. · CIK 0001581754 · Director · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 3,117,664

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · price: Each share of preferred stock converted automatically into 1 share of common stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The preferred stock had no expiration date.

F2 · ownership.nature: The securities are held of record by Foresite Capital Fund V, L.P. (Fund V). Foresite Capital Management V, LLC (FCM V) is the general partner of Fund V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. The Reporting Person is the sole managing member of FCM V and may be deemed to have sole voting and dispositive power over the securities held by Fund V. Each of Fund V, FCM V and the Reporting Person disclaims the existence of a "group" and disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

SEC source: 0001104659-26-093633 · tm2622668-1_4seq1.xml · derivative · entry 14

Westlake BioPartners Fund I, L.P. · CIK 0001749591 · 10% owner

Westlake BioPartners GP I, LLC · CIK 0002007650 · 10% owner

Westlake BioPartners Fund II, L.P. · CIK 0001811947 · 10% owner

Westlake BioPartners GP II, LLC · CIK 0001811948 · 10% owner

Westlake BioPartners Opportunity Fund I, L.P. · CIK 0001811946 · 10% owner

Westlake BioPartners Opportunity GP I, LLC · CIK 0001811945 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 165,519 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Reflects a convertible note that was convertible into shares of Common Stock of the Issuer. The convertible note had a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · price: Reflects a convertible note that was convertible into shares of Common Stock of the Issuer. The convertible note had a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · derivative.exercise_date: Reflects a convertible note that was convertible into shares of Common Stock of the Issuer. The convertible note had a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F4 · derivative.expiration_date: Reflects a convertible note that was convertible into shares of Common Stock of the Issuer. The convertible note had a maturity date of June 17, 2027. The principal amount of the convertible note together with any accrued but unpaid interest automatically converted into shares of Common Stock of the Issuer upon the closing of the Issuer's initial public offering at a conversion price equal to the initial public offering price of the Issuer's common stock.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. ("Fund II"). The general partner of Fund II is Westlake BioPartners GP II, LLC ("GP II"). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. Seidenberg is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. Seidenberg disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001104659-26-093633 · tm2622668-1_4seq1.xml · derivative · entry 13

Westlake BioPartners Fund I, L.P. · CIK 0001749591 · 10% owner

Westlake BioPartners GP I, LLC · CIK 0002007650 · 10% owner

Westlake BioPartners Fund II, L.P. · CIK 0001811947 · 10% owner

Westlake BioPartners GP II, LLC · CIK 0001811948 · 10% owner

Westlake BioPartners Opportunity Fund I, L.P. · CIK 0001811946 · 10% owner

Westlake BioPartners Opportunity GP I, LLC · CIK 0001811945 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 2,066,857 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F5 · ownership.nature: Shares held directly by Westlake BioPartners Opportunity Fund I, L.P. ("Opportunity Fund"). The general partner of Opportunity Fund is Westlake BioPartners Opportunity GP I, LLC ("Opportunity GP"). Opportunity GP may be deemed to share voting and dispositive power with regard to the shares held directly by Opportunity Fund. Seidenberg is the sole managing director of Opportunity GP and has voting and dispositive power over the shares held by Opportunity Fund. Seidenberg disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001104659-26-093633 · tm2622668-1_4seq1.xml · derivative · entry 12

Westlake BioPartners Fund I, L.P. · CIK 0001749591 · 10% owner

Westlake BioPartners GP I, LLC · CIK 0002007650 · 10% owner

Westlake BioPartners Fund II, L.P. · CIK 0001811947 · 10% owner

Westlake BioPartners GP II, LLC · CIK 0001811948 · 10% owner

Westlake BioPartners Opportunity Fund I, L.P. · CIK 0001811946 · 10% owner

Westlake BioPartners Opportunity GP I, LLC · CIK 0001811945 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 1,484,401 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. ("Fund II"). The general partner of Fund II is Westlake BioPartners GP II, LLC ("GP II"). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. Seidenberg is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. Seidenberg disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001104659-26-093633 · tm2622668-1_4seq1.xml · derivative · entry 11

Westlake BioPartners Fund I, L.P. · CIK 0001749591 · 10% owner

Westlake BioPartners GP I, LLC · CIK 0002007650 · 10% owner

Westlake BioPartners Fund II, L.P. · CIK 0001811947 · 10% owner

Westlake BioPartners GP II, LLC · CIK 0001811948 · 10% owner

Westlake BioPartners Opportunity Fund I, L.P. · CIK 0001811946 · 10% owner

Westlake BioPartners Opportunity GP I, LLC · CIK 0001811945 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,464,072 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F3 · ownership.nature: Shares held directly by Westlake BioPartners Fund II, L.P. ("Fund II"). The general partner of Fund II is Westlake BioPartners GP II, LLC ("GP II"). GP II may be deemed to share voting and dispositive power with regard to the shares held directly by Fund II. Seidenberg is the sole managing director of GP II and has voting and dispositive power over the shares held by Fund II. Seidenberg disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001104659-26-093633 · tm2622668-1_4seq1.xml · derivative · entry 10

Westlake BioPartners Fund I, L.P. · CIK 0001749591 · 10% owner

Westlake BioPartners GP I, LLC · CIK 0002007650 · 10% owner

Westlake BioPartners Fund II, L.P. · CIK 0001811947 · 10% owner

Westlake BioPartners GP II, LLC · CIK 0001811948 · 10% owner

Westlake BioPartners Opportunity Fund I, L.P. · CIK 0001811946 · 10% owner

Westlake BioPartners Opportunity GP I, LLC · CIK 0001811945 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 1,027,635 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F2 · ownership.nature: Shares held directly by Westlake BioPartners Fund I, L.P. ("Fund I"). The general partner of Fund I is Westlake BioPartners GP I, LLC ("GP I"). GP I may be deemed to share voting and dispositive power with regard to the shares held directly by Fund I. Beth Seidenberg ("Seidenberg") is the sole managing director of GP I and has voting and dispositive power over the shares held by Fund I. Seidenberg disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.

SEC source: 0001104659-26-093633 · tm2622668-1_4seq1.xml · derivative · entry 9

Westlake BioPartners Fund I, L.P. · CIK 0001749591 · 10% owner

Westlake BioPartners GP I, LLC · CIK 0002007650 · 10% owner

Westlake BioPartners Fund II, L.P. · CIK 0001811947 · 10% owner

Westlake BioPartners GP II, LLC · CIK 0001811948 · 10% owner

Westlake BioPartners Opportunity Fund I, L.P. · CIK 0001811946 · 10% owner

Westlake BioPartners Opportunity GP I, LLC · CIK 0001811945 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 3,547,842 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · price: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.exercise_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F1 · derivative.expiration_date: Each share of Series Seed Convertible Preferred Stock, Series A Convertible Preferred Stock, Series A-2 Convertible Preferred Stock and Series B Convertible Preferred Stock (collectively, the "Preferred Stock") converted automatically into 1 share of Common Stock upon the closing of the Issuer's initial public offering without payment of further consideration. Share numbers give effect to such conversion. The Preferred Stock had no expiration date.

F2 · ownership.nature: Shares held directly by Westlake BioPartners Fund I, L.P. ("Fund I"). The general partner of Fund I is Westlake BioPartners GP I, LLC ("GP I"). GP I may be deemed to share voting and dispositive power with regard to the shares held directly by Fund I. Beth Seidenberg ("Seidenberg") is the sole managing director of GP I and has voting and dispositive power over the shares held by Fund I. Seidenberg disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of her pecuniary interest therein, if any, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of any of the reported shares for purposes of Section 16 or any other purpose.