Phathom Pharmaceuticals, Inc. — Director's Dealing 2026

Feb 12, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Phathom Pharmaceuticals, Inc. (PHAT)
CIK: 0001783183
Period of Report: 2026-02-10

Reporting Person: Basta Steven L (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-10	Common Stock	A	12362	—	Acquired	379592	Direct
2026-02-10	Common Stock	F	6277	$12.82	Disposed	373315	Direct

Footnotes

F1: Represents shares issued upon vesting of performance stock units granted to the reporting person on April 3, 2025 based on the achievement of performance criteria determined to be satisfied on February 10, 2026.

F2: Includes 2,410 shares acquired under the Phathom Pharmaceuticals, Inc. employee stock purchase plan in January 2026.

F3: Represents shares underlying the performance stock units that were surrendered by the reporting person to the Issuer in satisfaction of the Issuer's tax withholding obligation.