Changes in Beneficial Ownership · 4
Phathom Pharmaceuticals, Inc.
PHATNASDAQEQUITYCurrent
Changes in Beneficial Ownership
Structured filing — 4
ownership.xml
Filing details
- Report period
- 2026-05-19
- Issuer
- Phathom Pharmaceuticals, Inc.
- Issuer CIK
- 0001783183
- Trading symbol
- PHAT
Reporting owner 1
- Name
- Topper James N
- Reporting owner CIK
- 0001341382
- Relationship
- Director · 10% owner
- Address
- C/O PHATHOM PHARMACEUTICALS, INC., 100 CAMPUS DRIVE, SUITE 102, FLORHAM PARK,, NJ, 07932
Non-derivative transactions
| Security | Transaction date | Code | Amount | A / D | Price (USD) | Owned after | Ownership |
|---|---|---|---|---|---|---|---|
| Common Stock | 2026-05-19 | A · Form 4 | 24,122[F1] | A | 0 | 66,718 | D |
Table key
- A · Form 4
- Acquisition by grant, award or otherwise under Rule 16b-3(d)
- A
- Acquired
- D
- Direct
Non-derivative holdings
| Security | Amount owned | Ownership | Nature of ownership |
|---|---|---|---|
| Common Stock | 59,403 | I | By Frazier Life Sciences X, L.P.[F2] |
| Common Stock | 5,827,415 | I | By Frazier Life Sciences IX, L.P.[F3] |
| Common Stock | 1 | I | By FHMLS IX, L.L.C.[F4] |
| Common Stock | 3,912 | I | By Topper Group III LLC[F5] |
Table key
- I
- Indirect
Footnotes
- F1
- The Restricted Stock Units ("RSUs") were granted on May 19, 2026, pursuant to the Issuer's Non-Employee Director Compensation Program. 100% of the total number of RSUs granted shall vest on the first to occur of (A) the first anniversary of the date of grant or (B) the next occurring annual meeting of the Issuer's stockholders, subject to the Reporting Person's continuing service on the Board through such vesting date. Each RSU represents a contingent right to receive one share of common stock of the Issuer.↩ 1
- F2
- The shares reported herein are held of record by Frazier Life Sciences X, L.P. FHMLS X, L.P. is the general partner of Frazier Life Sciences X, L.P. and FHMLS X, L.L.C. is the general partner of FHMLS X, L.P. The Reporting Person is one of two managing members of FHMLS X, L.L.C. The Reporting Person disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.↩ 1
- F3
- The shares reported herein are held of record by Frazier Life Sciences IX, L.P. FHMLS IX, L.P. is the general partner of Frazier Life Sciences IX, L.P. and FHMLS IX, L.L.C. is the general partner of FHMLS IX, L.P. The Reporting Person is one of two managing members of FHMLS IX, L.L.C. The Reporting Person disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.↩ 1
- F4
- The shares reported herein are held of record by FHMLS IX, L.L.C. The Reporting Person is one of two managing members of FHMLS IX, L.L.C. The Reporting Person disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.↩ 1
- F5
- The Reporting Person is a manager of Topper Group III LLC and has voting and investment power of the securities held by Topper Group III LLC.↩ 1
Signature 1
- Signed
- /s/ Anne Marie Cook, Attorney-in-Fact for James Topper
- Date
- 2026-05-21
Company context
Phathom Pharmaceuticals is a biopharmaceutical company focused on the commercialization and development of novel treatments for gastrointestinal diseases. Phathom has in-licensed the exclusive rights to vonoprazan, a first-in-class potassium-competitive acid blocker (PCAB) for the U.S., Europe and Canada. Phathom currently markets vonoprazan in the United States as VOQUEZNA® (vonoprazan) tablets for the relief of heartburn associated with Non-Erosive GERD in adults, the healing and maintenance of healing of Erosive GERD in adults and relief of associated heartburn, and as part of VOQUEZNA® DUAL PAK® (vonoprazan tablets, amoxicillin capsules) and VOQUEZNA® TRIPLE PAK® (vonoprazan tablets, amoxicillin capsules, clarithromycin tablets) for the treatment of H. pylori infection in adults. For more information about Phathom, visit the company’s website at www.phathompharma.com and follow on LinkedIn and X.