Phathom Pharmaceuticals Inc
Ownership
Ownership Structure
Who owns Phathom Pharmaceuticals Inc (PHAT)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 80.4% of the shares are freely tradable; institutional investors hold 89.2%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Frazier Life Sciences Management, L.P. | 15.41 | 12,466,489 | +0.0 | 06/30/2026 |
| Medicxi Ventures Management (Jersey) Ltd | 9.23 | 7,464,572 | +0.0 | 06/30/2026 |
| BlackRock Inc | 5.59 | 4,525,129 | +11.4 | 06/30/2026 |
| Amvescap Plc. | 4.98 | 4,029,731 | -6.8 | 06/30/2026 |
| The Carlyle Group Inc | 4.32 | 3,496,808 | +0.0 | 06/30/2026 |
| Millennium Management LLC | 4.17 | 3,375,834 | -16.1 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.28 | 2,656,944 | +2.8 | 06/30/2026 |
| GW&K Investment Management, LLC | 2.68 | 2,166,838 | +52.5 | 06/30/2026 |
| Franklin Templeton Inc | 2.44 | 1,970,828 | +98.2 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.48 | 2,007,668 | +0.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Narula Sanjeev | Chief Financial & Bus. Officer | 214,718 | 1,223,893 $ | Oct 6, 2026 | direct |
| Breedlove Robert Charles | Principal Accounting Officer | 59,465 | 338,951 $ | Sep 3, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 6, 2026 | Narula Sanjeev | Chief Financial & Bus. Officer | Other | 13,485 | 6.78 | 91,428 |
| Sep 3, 2026 | Breedlove Robert Charles | Principal Accounting Officer | Other | 460 | 9.05 | 4,163 |
| Jul 14, 2026 | Breedlove Robert Charles | Principal Accounting Officer | Other | 1,555 | 11.04 | 17,159 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.