LeonaBio, Inc. (LONA) Ownership
LONA ownership summary
as of October 18, 2026- Institutions
- 87.7% of shares outstanding
- Insiders
- 4.07% of shares outstanding
- Shares outstanding
- 9.4M
- Float
- 4.7M shares available to trade
- Short interest
- 0.26% 19K shares short
- Days to cover
- 0.15 short interest down 19.0% vs prior month
- Institutions 87.66%
- Insiders 4.07%
- Other investors 8.27%
LONA top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Perceptive Advisors LLC | 19.73% | 1.9M | $9.7M | — | June 30, 2026 |
| 2 | Kalehua Capital Management LLC | 8.36% | 787K | $4.1M | — | June 30, 2026 |
| 3 | ADAR1 Capital Management LLC | 8.25% | 777K | $4.0M | +49,619 (+6.8%) | June 30, 2026 |
| 4 | COMMODORE CAPITAL LP | 4.93% | 464K | $2.4M | — | June 30, 2026 |
| 5 | TCG Crossover Management, LLC | 4.93% | 464K | $2.4M | — | June 30, 2026 |
| 6 | NEA Management Company, LLC | 4.93% | 464K | $2.4M | — | June 30, 2026 |
| 7 | Spruce Street Capital LP | 4.18% | 394K | $2.0M | — | June 30, 2026 |
| 8 | Blackstone Inc | 3.45% | 325K | $1.7M | +324,638 (0.0%) | June 30, 2026 |
| 9 | Adage Capital Partners Gp LLC | 3.18% | 300K | $1.6M | +300,000 (0.0%) | June 30, 2026 |
| 10 | Vanguard Capital Management, LLC | 2.92% | 275K | $1.4M | +80,473 (+41.3%) | June 30, 2026 |
| 11 | Seven Fleet Capital Management LP | 1.64% | 154K | $801,596 | −10,523 (−6.4%) | June 30, 2026 |
| 12 | Propel Bio Management LLC | 1.58% | 149K | $776,251 | — | June 30, 2026 |
| 13 | Simplify Asset Management Inc. | 1.58% | 149K | $776,251 | — | June 30, 2026 |
| 14 | Geode Capital Management, LLC | 0.85% | 80K | $418,174 | +95 (+0.1%) | June 30, 2026 |
| 15 | BlackRock Inc | 0.84% | 79K | $411,767 | +23,135 (+41.3%) | June 30, 2026 |
| 16 | Renaissance Technologies Corp | 0.82% | 77K | $402,605 | +13,202 (+20.6%) | June 30, 2026 |
| 17 | Vanguard Fiduciary Trust Co | 0.45% | 43K | $222,633 | +2,775 (+6.9%) | June 30, 2026 |
| 18 | Bank of America Corp | 0.35% | 33K | $169,296 | −9 (−0.0%) | June 30, 2026 |
| 19 | Millennium Management LLC | 0.34% | 32K | $168,740 | +772 (+2.4%) | June 30, 2026 |
| 20 | Laird Norton Tyee Trust Co | 0.23% | 22K | $113,454 | — | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 9 holders added 795K shares and 2 cut 11K.
LONA top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 1.95% | 183K | $952,947 | — | August 31, 2026 |
| 2 | Simplify Propel Opportunities ETF | 1.58% | 149K | $776,251 | — | September 30, 2026 |
| 3 | Fidelity Extended Market Index | 0.38% | 36K | $185,110 | −191 (−0.5%) | August 31, 2026 |
| 4 | iShares Micro-Cap ETF | 0.22% | 21K | $106,865 | −142 (−0.7%) | September 30, 2026 |
| 5 | Fidelity Total Market Index | 0.13% | 12K | $61,599 | — | August 31, 2026 |
| 6 | Fidelity Series Total Market Index | 0.11% | 10K | $52,042 | — | August 31, 2026 |
| 7 | Fidelity Nasdaq Composite Index | 0.08% | 7,723 | $40,160 | — | August 31, 2026 |
| 8 | Vanguard MStar Inst Ttl StkMktIdxInstlPl | 0.06% | 5,988 | $31,138 | — | August 31, 2026 |
| 9 | DFA US Micro Cap I | 0.04% | 3,774 | $19,625 | — | August 31, 2026 |
| 10 | Vanguard Balanced Index Inv | 0.04% | 3,596 | $18,699 | — | August 31, 2026 |
| 11 | Dimensional US Core Equity 1 ETF | 0.03% | 2,614 | $13,593 | — | September 24, 2026 |
| 12 | DFA US Vector Equity I | 0.02% | 1,530 | $7,956 | — | August 31, 2026 |
| 13 | 1290 VT Micro Cap K | 0.02% | 1,482 | $7,706 | — | August 31, 2026 |
| 14 | Dimensional Global Core Equity USD Acc | 0.01% | 1,366 | $7,103 | +1,366 (0.0%) | August 31, 2026 |
| 15 | Vanguard U.S. Eq Idx £ Acc | 0.01% | 1,325 | $6,890 | — | August 31, 2026 |
| 16 | DFA US Social Core Equity 2 Portfolio | 0.01% | 1,253 | $6,516 | — | August 31, 2026 |
| 17 | DFA US Sustainability Core 1 | 0.01% | 1,251 | $6,505 | — | August 31, 2026 |
| 18 | Dimensional Gl Cor Eq LC ESG Sc USD A | 0.01% | 1,130 | $5,876 | — | August 31, 2026 |
| 19 | Dimensional US Core Equity 2 ETF | 0.01% | 1,048 | $5,450 | — | September 30, 2026 |
| 20 | DFA US Core Equity 1 I | 0.01% | 1,021 | $5,309 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
LONA insider transactions
latest 4| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-04 | Mark James Litton | Sell | $5.37 | 5,156 | $27,688 |
| 2026-03-04 | Mark Worthington | Sell | $5.37 | 1,328 | $7,131 |
| 2026-03-04 | Martin Javier San | Sell | $5.37 | 1,720 | $9,236 |
| 2026-03-04 | Robert Renninger | Sell | $5.37 | 906 | $4,865 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
LONA shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns LONA
Institutional investors own 87.7% of LeonaBio's shares and insiders 4.07%. The largest holder is Perceptive Advisors LLC with 19.73% of the shares (1.9M), as of June 30, 2026. Among the top 20 institutions, 9 added shares and 2 reduced their stake in the latest filings. Short interest is 0.26% of the float, or 0.15 days of average trading volume. The share count rose 31.1% since 2019.
Related: LONA analyst forecast, LONA key metrics. See the LONA stock overview for the latest quote and news.
LONA ownership FAQ
Who owns the most LeonaBio stock?
The largest shareholders of LeonaBio are Perceptive Advisors LLC (19.73%), Kalehua Capital Management LLC (8.36%), ADAR1 Capital Management LLC (8.25%), COMMODORE CAPITAL LP (4.93%), TCG Crossover Management, LLC (4.93%).
What percentage of LeonaBio is owned by institutions?
Institutions hold 87.7% of LeonaBio's shares outstanding; insiders hold 4.07%.
Which funds own LeonaBio?
The largest fund holders of LeonaBio are Vanguard MStar Total Stk Mkt Idx Invest (1.95%), Simplify Propel Opportunities ETF (1.58%), Fidelity Extended Market Index (0.38%), iShares Micro-Cap ETF (0.22%), Fidelity Total Market Index (0.13%).
What is LeonaBio's short interest?
19K shares of LeonaBio were sold short, 0.26% of the float; at the average daily volume it would take 0.15 days to cover.
Are insiders buying or selling LeonaBio?
Of the latest 4 reported insider transactions in LeonaBio (since March 4, 2026), 0 were purchases and 4 were sales.
How many shares of LeonaBio are outstanding?
LeonaBio has 9.4M shares outstanding, of which 4.7M are in the public float.