Protagonist Therapeutics Inc
Ownership
Ownership Structure
Who owns Protagonist Therapeutics Inc (PTGX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 81.7% of the shares are freely tradable; institutional investors hold 125.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 15.93 | 10,307,837 | +5.4 | 06/30/2026 |
| Farallon Capital Management, L.L.C. | 9.81 | 6,348,906 | +0.0 | 06/30/2026 |
| RTW INVESTMENTS, LLC | 7.82 | 5,061,175 | +0.0 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.61 | 3,629,298 | +4.3 | 06/30/2026 |
| Wellington Management Company LLP | 5.28 | 3,416,781 | -5.1 | 06/30/2026 |
| UBS Group AG | 5.25 | 3,399,221 | -34.4 | 06/30/2026 |
| State Street Corp | 5.13 | 3,321,554 | +6.6 | 06/30/2026 |
| HHG PLC | 4.47 | 2,891,527 | +9.1 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.41 | 2,853,394 | +1.7 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.96 | 3,854,840 | +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 |
|---|---|---|---|---|---|
| Patel Dinesh V Ph D | President and CEO | 522,968 | 75,778,063 $ | Sep 10, 2026 | direct |
| Ali Asif | Chief Financial Officer | 59,003 | 8,549,535 $ | Sep 30, 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 |
|---|---|---|---|---|---|---|
| Sep 30, 2026 | Ali Asif | Chief Financial Officer | Sell | 46,034 | 141.78 | 6,526,701 |
| Sep 30, 2026 | Ali Asif | Chief Financial Officer | Sell | 12,595 | 141.77 | 1,785,593 |
| Sep 30, 2026 | Ali Asif | Chief Financial Officer | Other | 5,312 | 12.17 | 64,647 |
| Sep 30, 2026 | Ali Asif | Chief Financial Officer | Other | 15,650 | 19.19 | 300,324 |
| Sep 30, 2026 | Ali Asif | Chief Financial Officer | Other | 28,438 | 23.42 | 666,018 |
| Sep 30, 2026 | Ali Asif | Chief Financial Officer | Other | 9,229 | 38.98 | 359,746 |
| Sep 10, 2026 | Patel Dinesh V Ph D | President and CEO | Sell | 7,278 | 144.10 | 1,048,760 |
| Sep 10, 2026 | Patel Dinesh V Ph D | President and CEO | Other | 7,278 | 21.58 | 157,059 |
| Sep 9, 2026 | Patel Dinesh V Ph D | President and CEO | Sell | 63,548 | 146.18 | 9,289,447 |
| Sep 9, 2026 | Patel Dinesh V Ph D | President and CEO | Other | 63,548 | 21.58 | 1,371,366 |
| Sep 8, 2026 | Patel Dinesh V Ph D | President and CEO | Sell | 54,174 | 145.87 | 7,902,361 |
| Sep 8, 2026 | Patel Dinesh V Ph D | President and CEO | Other | 54,174 | 21.58 | 1,169,075 |
| Sep 3, 2026 | Patel Dinesh V Ph D | President and CEO | Other | 510 | 0.00 | – |
| Aug 11, 2026 | Patel Dinesh V Ph D | President and CEO | Sell | 34,239 | 148.52 | 5,085,176 |
| Aug 11, 2026 | Patel Dinesh V Ph D | President and CEO | Other | 34,239 | 21.58 | 738,878 |
| Aug 10, 2026 | Patel Dinesh V Ph D | President and CEO | Sell | 65,761 | 149.11 | 9,805,623 |
| Aug 10, 2026 | Patel Dinesh V Ph D | President and CEO | Other | 65,761 | 21.58 | 1,419,122 |
| Apr 20, 2026 | Asif Ali | CFO | Sell | 1,750 | 105.47 | 184,573 |
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: October 30, 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.