Steven L. Basta - 02 Jan 2026 Form 4 Insider Report for Phathom Pharmaceuticals, Inc. (PHAT)

Role: President and CEO, Director
Signature: /s/ Steven L. Basta
Issuer symbol: PHAT
Transactions as of: 02 Jan 2026
Net transactions value: $0
Form type: 4
Filing time: 02 Jan 2026, 17:46:12 UTC
Previous filing: 19 Dec 2025
Next filing: 12 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Basta Steven L	President and CEO, Director	C/O PHATHOM PHARMACEUTICALS, INC., 100 CAMPUS DRIVE, SUITE 102, FLORHAM PARK	/s/ Steven L. Basta	02 Jan 2026	0001417397

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PHAT	Common Stock	Award	$0	+251,034	+221%	$0.000000	364,820	02 Jan 2026	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	PHAT	Stock Option (Right to Buy)	Award	$0	+226,156		$0.000000	221,156	02 Jan 2026	Common Stock	226,156	$15.71	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents restricted stock units ("RSUs") granted on January 2, 2026. 1/3 of the total number of RSUs granted vest on each of the first three anniversaries of January 2, 2026, the vesting commencement date (the "Vesting Commencement Date"), subject to the Reporting Person's continued service through each vesting date. Each RSU represents a contingent right to receive one share of common stock of the Issuer.
F2	1/48th of the total number of shares of common stock subject to the option vest monthly following the Vesting Commencement Date, subject to the Reporting Person's continuous service to the Issuer through each vesting date.

Content

Represents restricted stock units ("RSUs") granted on January 2, 2026. 1/3 of the total number of RSUs granted vest on each of the first three anniversaries of January 2, 2026, the vesting commencement date (the "Vesting Commencement Date"), subject to the Reporting Person's continued service through each vesting date. Each RSU represents a contingent right to receive one share of common stock of the Issuer.

1/48th of the total number of shares of common stock subject to the option vest monthly following the Vesting Commencement Date, subject to the Reporting Person's continuous service to the Issuer through each vesting date.