Lyell Immunopharma Inc
Ownership
Ownership Structure
Who owns Lyell Immunopharma Inc (LYEL)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 49.5% of the shares are freely tradable; institutional investors hold 57.0%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| ARCH VENTURE CORP | 13.25 | 3,247,162 | +0.0 | 06/30/2026 |
| GSK PLC | 6.17 | 1,512,659 | +0.0 | 03/31/2026 |
| Orland Properties Ltd | 3.08 | 754,698 | +0.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.93 | 718,155 | +0.0 | 03/31/2026 |
| Almitas Capital LLC | 2.36 | 577,807 | +0.0 | 03/31/2026 |
| Foresite Capital Management V, LLC | 1.94 | 476,386 | -0.1 | 06/30/2026 |
| Millennium Management LLC | 1.50 | 367,473 | -19.9 | 06/30/2026 |
| Opaleye Management Inc | 1.40 | 344,025 | +334.9 | 06/30/2026 |
| venBio Partners LLC | 1.38 | 337,697 | +0.0 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.47 | 604,461 | +0.0 | 08/31/2026 |
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 |
|---|---|---|---|---|---|
| Seely Lynn | President and CEO | 63,899 | 619,820 $ | Aug 21, 2026 | direct |
| Shook David | Chief Medical Officer | 20,423 | 198,103 $ | Sep 10, 2026 | direct |
| Hill Stephen J. | Chief Operating Officer | 16,816 | 163,115 $ | Aug 21, 2026 | direct |
| Lee Gary K. | Chief Scientific Officer | 16,220 | 157,334 $ | Aug 21, 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 10, 2026 | Shook David | Chief Medical Officer | Sell | 500 | 12.70 | 6,350 |
| Aug 21, 2026 | Lee Gary K. | Chief Scientific Officer | Sell | 1,457 | 15.54 | 22,642 |
| Aug 21, 2026 | Hill Stephen J. | Chief Operating Officer | Sell | 989 | 15.54 | 15,369 |
| Aug 21, 2026 | Seely Lynn | President and CEO | Sell | 9,589 | 15.54 | 149,013 |
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: September 28, 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.