LeonaBio, Inc.
Ownership
Ownership Structure
Who owns LeonaBio, Inc. (LONA)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 41.6% of the shares are freely tradable; institutional investors hold 70.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Perceptive Advisors LLC | 19.73 | 1,859,322 | +0.0 | 06/30/2026 |
| Kalehua Capital Management LLC | 8.36 | 787,402 | +0.0 | 06/30/2026 |
| ADAR1 Capital Management LLC | 8.25 | 777,100 | +6.8 | 06/30/2026 |
| COMMODORE CAPITAL LP | 4.93 | 464,398 | +0.0 | 06/30/2026 |
| TCG Crossover Management, LLC | 4.93 | 464,398 | +0.0 | 06/30/2026 |
| NEA Management Company, LLC | 4.93 | 464,398 | +0.0 | 06/30/2026 |
| Spruce Street Capital LP | 4.18 | 393,701 | +0.0 | 06/30/2026 |
| Blackstone Inc | 3.45 | 324,638 | +0.0 | 06/30/2026 |
| Adage Capital Partners Gp LLC | 3.18 | 300,000 | +0.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.92 | 275,233 | +41.3 | 06/30/2026 |
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 |
|---|---|---|---|---|---|
| Portman David J. | 10% Owner | 3,149,470 | 11,653,039 $ | Oct 26, 2026 | indirect |
| Perceptive Advisors Llc | Director | 776,648 | 2,873,598 $ | Oct 26, 2026 | indirect |
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 26, 2026 | Portman David J. | 10% Owner | Buy | 3,149,470 | 3,149.47 | 9,919,161,281 |
| Oct 26, 2026 | Perceptive Advisors Llc | Director | Other | 776,648 | 0.001 | 777 |
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 12, 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.