Protagonist Therapeutics, Inc. (PTGX) ownership: Top institutional holder: BlackRock, Inc. ($1.03B). Insider activity: Net Seller (0 buys, 20 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 9779369.00 | $1.03B | 2026-03-31 |
| FARALLON CAPITAL MANAGEMENT LLC | 6348906.00 | $669.17M | 2026-03-31 |
| UBS Group AG | 5177796.00 | $545.74M | 2026-03-31 |
| RTW INVESTMENTS, LP | 5059053.00 | $533.22M | 2026-03-31 |
| VANGUARD GROUP INC | 5413690.00 | $472.83M | 2025-12-31 |
| WELLINGTON MANAGEMENT GROUP LLP | 3599644.00 | $379.40M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3481211.00 | $366.92M | 2026-03-31 |
| STATE STREET CORP | 3116749.00 | $328.51M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-08 | |
| Sell | null | 2026-05-08 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.