Institutional HoldersBeta
Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.
Share classes (cover page of the 10-Q filed 2026-08-10, as of 2026-08-06)
| Class | Listed | Shares outstanding | Held by 13F filers | % of class | Holders | CUSIP |
|---|---|---|---|---|---|---|
| Common stock | OBIO · NASDAQ | 60,105,049 | 27,693,080 | 46.1% | 77 | 68572M106 |
Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.
Top holders (77 of 77 · 68572M106)
change vs 2026-03-31| # | Filer | Shares | % of class | Value | Change |
|---|---|---|---|---|---|
| 1 | RTW INVESTMENTS, LP | 9,556,063 | 15.90% | $41.2M | +1,250,000 (+15.0%) |
| 2 | PERCEPTIVE ADVISORS LLC | 5,037,906 | 8.38% | $21.7M | — |
| 3 | BlackRock, Inc. | 2,510,387 | 4.18% | $10.8M | +1,874,673 (+294.9%) |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 2,022,916 | 3.37% | $8.7M | -181,403 (-8.2%) |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 1,007,908 | 1.68% | $4.4M | +522,416 (+107.6%) |
| 6 | Alyeska Investment Group, L.P. | 1,000,000 | 1.66% | $4.3M | — |
| 7 | Propel Bio Management, LLC | 896,701 | 1.49% | $3.9M | — |
| 8 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 642,154 | 1.07% | $2.8M | NEW |
| 9 | STATE STREET CORP | 516,050 | 0.86% | $2.2M | +346,640 (+204.6%) |
| 10 | RICE HALL JAMES & ASSOCIATES, LLC | 424,000 | 0.71% | $1.8M | +404,999 (+2131.5%) |
| 11 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 349,544 | 0.58% | $1.5M | +84,045 (+31.7%) |
| 12 | NORTHERN TRUST CORP | 343,640 | 0.57% | $1.5M | +225,366 (+190.5%) |
| 13 | UBS Group AG | 325,773 | 0.54% | $1.4M | +275,463 (+547.5%) |
| 14 | VANGUARD FIDUCIARY TRUST CO | 292,253 | 0.49% | $1.3M | +57,039 (+24.2%) |
| 15 | VANGUARD PORTFOLIO MANAGEMENT LLC | 274,973 | 0.46% | $1.2M | NEW |
| 16 | Knott David M Jr | 253,651 | 0.42% | $1.1M | — |
| 17 | Flat Footed LLC | 251,372 | 0.42% | $1.1M | NEW |
| 18 | Simplify Asset Management Inc. | 219,387 | 0.37% | $947K | — |
| 19 | GOLDMAN SACHS GROUP INC | 179,606 | 0.30% | $775K | +24,364 (+15.7%) |
| 20 | DAFNA Capital Management LLC | 126,841 | 0.21% | $547K | — |
| 21 | Daytona Street Capital LLC | 96,398 | 0.16% | $379K | +43,798 (+83.3%) |
| 22 | RENAISSANCE TECHNOLOGIES LLC | 90,000 | 0.15% | $388K | +19,100 (+26.9%) |
| 23 | IFP Advisors, Inc | 89,608 | 0.15% | $387K | -9,279 (-9.4%) |
| 24 | Bank of New York Mellon Corp | 86,103 | 0.14% | $372K | NEW |
| 25 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 80,600 | 0.13% | $348K | +10,000 (+14.2%) |
| 26 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 65,804 | 0.11% | $284K | -31,717 (-32.5%) |
| 27 | CITADEL ADVISORS LLC | 56,191 | 0.09% | $242K | -22,994 (-29.0%) |
| 28 | Nuveen, LLC | 52,118 | 0.09% | $225K | NEW |
| 29 | Holos Integrated Wealth LLC | 51,595 | 0.09% | $204K | — |
| 30 | NewEdge Advisors, LLC | 44,083 | 0.07% | $190K | — |
| 31 | Y-Intercept (Hong Kong) Ltd | 43,486 | 0.07% | $188K | NEW |
| 32 | DEUTSCHE BANK AG\ | 39,672 | 0.07% | $171K | NEW |
| 33 | XTX Topco Ltd | 38,814 | 0.06% | $167K | NEW |
| 34 | WELLS FARGO & COMPANY/MN | 36,356 | 0.06% | $157K | NEW |
| 35 | HighTower Advisors, LLC | 35,375 | 0.06% | $153K | +17,100 (+93.6%) |
| 36 | Affinity Asset Advisors, LLC | 33,400 | 0.06% | $144K | -369,150 (-91.7%) |
| 37 | PRICE T ROWE ASSOCIATES INC /MD/ | 32,689 | 0.05% | $142K | NEW |
| 38 | RHUMBLINE ADVISERS | 31,940 | 0.05% | $138K | NEW |
| 39 | Meramec Financial Planners, LLC | 30,000 | 0.05% | $115K | — |
| 40 | MORGAN STANLEY | 29,160 | 0.05% | $126K | -6,479 (-18.2%) |
| 41 | ALGERT GLOBAL LLC | 28,486 | 0.05% | $123K | +13,830 (+94.4%) |
| 42 | AXQ CAPITAL, LP | 25,448 | 0.04% | $110K | NEW |
| 43 | Invesco Ltd. | 24,689 | 0.04% | $107K | NEW |
| 44 | MetLife Investment Management, LLC | 23,994 | 0.04% | $104K | NEW |
| 45 | BANK OF AMERICA CORP /DE/ | 23,822 | 0.04% | $103K | -28,939 (-54.8%) |
| 46 | TWO SIGMA INVESTMENTS, LP | 22,563 | 0.04% | $97K | -37,544 (-62.5%) |
| 47 | CANADA PENSION PLAN INVESTMENT BOARD | 21,100 | 0.04% | $91K | +9,800 (+86.7%) |
| 48 | JPMORGAN CHASE & CO | 20,880 | 0.03% | $99K | +16,622 (+390.4%) |
| 49 | NEW YORK STATE COMMON RETIREMENT FUND | 20,400 | 0.03% | $88K | NEW |
| 50 | CITIGROUP INC | 20,165 | 0.03% | $87K | -5,364 (-21.0%) |
| 51 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 18,352 | 0.03% | $79K | NEW |
| 52 | JANE STREET GROUP, LLC | 15,360 | 0.03% | $66K | -40,320 (-72.4%) |
| 53 | Vanguard Global Advisers, LLC | 13,948 | 0.02% | $60K | — |
| 54 | BARCLAYS PLC | 13,518 | 0.02% | $58K | -45,824 (-77.2%) |
| 55 | ABLE Financial Group, LLC | 13,402 | 0.02% | $58K | — |
| 56 | Sargent Investment Group, LLC | 13,120 | 0.02% | $57K | NEW |
| 57 | Frec Markets, Inc. | 13,048 | 0.02% | $56K | — |
| 58 | Police & Firemen's Retirement System of New Jersey | 11,755 | 0.02% | $51K | NEW |
| 59 | Garden State Investment Advisory Services LLC | 10,562 | 0.02% | $46K | — |
| 60 | China Universal Asset Management Co., Ltd. | 9,530 | 0.02% | $41K | -490 (-4.9%) |
| 61 | BNP PARIBAS FINANCIAL MARKETS | 8,214 | 0.01% | $35K | +6,758 (+464.1%) |
| 62 | Legal & General Group Plc | 3,924 | 0.01% | $17K | NEW |
| 63 | Ameritas Investment Partners, Inc. | 3,617 | 0.01% | $16K | NEW |
| 64 | Tower Research Capital LLC (TRC) | 3,601 | 0.01% | $16K | +3,054 (+558.3%) |
| 65 | Russell Investments Group, Ltd. | 3,187 | 0.01% | $14K | NEW |
| 66 | Mirae Asset Global Investments Co., Ltd. | 2,678 | 0.00% | $12K | -267 (-9.1%) |
| 67 | SIMPLEX TRADING, LLC | 2,564 | 0.00% | $11K | +183 (+7.7%) |
| 68 | ROYAL BANK OF CANADA | 1,864 | 0.00% | $8K | +928 (+99.1%) |
| 69 | AdvisorNet Financial, Inc | 1,696 | 0.00% | $7K | — |
| 70 | GF FUND MANAGEMENT CO. LTD. | 1,173 | 0.00% | $5K | -87 (-6.9%) |
| 71 | JONES FINANCIAL COMPANIES LLLP | 888 | 0.00% | $4K | +500 (+128.9%) |
| 72 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 549 | 0.00% | $2K | NEW |
| 73 | FMR LLC | 265 | 0.00% | $1K | -17,811 (-98.5%) |
| 74 | Sterling Capital Management LLC | 140 | 0.00% | $604 | NEW |
| 75 | Optiver Holding B.V. | 40 | 0.00% | $173 | NEW |
| 76 | Caitong International Asset Management Co., Ltd | 15 | 0.00% | $65 | NEW |
| 77 | SBI Securities Co., Ltd. | 6 | 0.00% | $26 | — |
Exited since 2026-03-31 (13 filers; largest 13 shown)
Large holders from 13D/13G (latest per reporting person, last 2 years)
Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.
| Reporting person | Form | Filed | Event | Shares | % of class |
|---|---|---|---|---|---|
| RTW Innovation Master Fund, Ltd. | SCHEDULE 13D/A | 2026-04-29 | 2026-04-27 | 4,931,714 | 8.1% |
| RTW Master Fund, Ltd. | SCHEDULE 13D/A | 2026-04-29 | 2026-04-27 | 5,820,915 | 9.6% |
| RTW Investments, LP | SCHEDULE 13D/A | 2026-04-29 | 2026-04-27 | 11,942,394 | 19.2% |
| Roderick Wong | SCHEDULE 13D/A | 2026-04-29 | 2026-04-27 | 11,942,394 | 19.2% |
| Covidien Group S.a.r.l. | SCHEDULE 13G/A | 2026-02-27 | 2025-12-31 | 10,078,625 | 17.8% |
| Medtronic plc | SCHEDULE 13G/A | 2026-02-27 | 2025-12-31 | 10,078,625 | 17.8% |
| Dana Lorenzo | SCHEDULE 13G | 2025-11-19 | 2025-11-15 | 3,098,592 | 5.5% |
| Tasso Partners, LLC | SCHEDULE 13G | 2025-11-19 | 2025-11-15 | 2,849,592 | 5% |
| Joseph Edelman | SCHEDULE 13G/A | 2025-11-14 | 2025-09-30 | 5,679,480 | 9.99% |
| Perceptive Life Sciences Master Fund, Ltd. | SCHEDULE 13G/A | 2025-11-14 | 2025-09-30 | 5,679,480 | 9.99% |
| Perceptive Advisors LLC | SCHEDULE 13G/A | 2025-11-14 | 2025-09-30 | 5,679,480 | 9.99% |
| Roderick Wong, M.D. | SCHEDULE 13D/A | 2025-05-01 | 2025-04-29 | 8,306,063 | 21.7% |
| BlackRock, Inc. | SCHEDULE 13G/A | 2025-04-29 | 2025-03-31 | 1,430,701 | 3.7% |
Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.