Halozyme Therapeutics Inc (HALO)
Who owns Halozyme Therapeutics Inc (HALO)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 98.9% of the shares are freely tradable; institutional investors hold 107.2%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.18 | 13,265,053 | +0.8 | 03/31/2026 |
| Vanguard Group Inc | 9.75 | 11,566,896 | -0.5 | 12/31/2025 |
| Vanguard Capital Management, LLC | 4.44 | 5,271,218 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 4.43 | 5,249,206 | +0.0 | 03/31/2026 |
| State Street Corp | 4.16 | 4,937,854 | -3.6 | 03/31/2026 |
| Amvescap Plc. | 3.38 | 4,012,494 | +10.0 | 03/31/2026 |
| Bank of America Corp | 2.46 | 2,913,109 | +6.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.36 | 3,989,375 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.17 | 3,758,680 | +0.6 | 04/30/2026 |
| Vanguard Small Cap Index | 2.29 | 2,719,013 | -0.2 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 8. Jul 2026 | Torley Helen | PRESIDENT AND CEO | Sell | 1,035 | 80.19 | 82,994 |
| 8. Jul 2026 | Torley Helen | PRESIDENT AND CEO | Sell | 888 | 79.28 | 70,397 |
| 8. Jul 2026 | Torley Helen | PRESIDENT AND CEO | Other | 1,923 | 12.07 | 23,211 |
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: July 31, 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.