AURA BIOSCIENCES INC AURA
COM · Common Stock · CUSIP 05153U107
- SectorHealth care
- IndustryBiological Products, (No Diagnostic Substances)
- HeadquartersBoston, MA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($81.4k this quarter). Holder counts are more reliable. Shares outstanding: 103.7m as of 2026-08-06, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $7.10. Options: 2 managers hold calls ($175.4k notional), 3 hold puts ($1.1m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 43 |
| Q4 2022 | 50 |
| Q1 2023 | 58 |
| Q2 2023 | 60 |
| Q3 2023 | 65 |
| Q4 2023 | 73 |
| Q1 2024 | 79 |
| Q2 2024 | 76 |
| Q3 2024 | 82 |
| Q4 2024 | 95 |
| Q1 2025 | 95 |
| Q2 2025 | 106 |
| Q3 2025 | 106 |
| Q4 2025 | 117 |
| Q1 2026 | 126 |
| Q2 2026 | 146 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 39 | 28 |
| Q4 2024 | 54 | 25 |
| Q1 2025 | 45 | 41 |
| Q2 2025 | 58 | 44 |
| Q3 2025 | 48 | 39 |
| Q4 2025 | 52 | 46 |
| Q1 2026 | 58 | 53 |
| Q2 2026 | 94 | 42 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $3.7k | $0 | 0.00 |
| Q4 2025 | $8.2k | $0 | 0.00 |
| Q1 2026 | $10.0k | $2.5m | 245.53 |
| Q2 2026 | $175.4k | $1.1m | 6.05 |
Biggest buyers
| TCG Crossover Management, LLC | New | +9.5m |
| Caligan Partners LP | Added | +4.1m |
| FCPM III SERVICES B.V. | New | +4.1m |
| Nantahala Capital Management, LLC | Added | +3.8m |
| ORBIMED ADVISORS LLC | New | +3.3m |
| MONTANOVA CAPITAL, LLC | Added | +2.8m |
| RA CAPITAL MANAGEMENT, L.P. | New | +2.5m |
| Frazier Life Sciences Management, L.P. | Added | +2.0m |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | +1.9m |
| Balyasny Asset Management L.P. | Added | +1.8m |
Biggest sellers
| Matrix Capital Management Company, LP | Sold out | -6.9m |
| MILLENNIUM MANAGEMENT LLC | Reduced | -480.2k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Reduced | -241.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -136.7k |
| LEVIN CAPITAL STRATEGIES, L.P. | Reduced | -103.3k |
| Maven Securities LTD | Sold out | -50.0k |
| UBS Group AG | Reduced | -49.7k |
| MORGAN STANLEY | Reduced | -49.3k |
| AMERICAN CENTURY COMPANIES INC | Sold out | -48.3k |
| BANK OF AMERICA CORP /DE/ | Reduced | -38.2k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | New | $104.4k14.7k shares |
| SIMPLEX TRADING, LLC | New | $71.0k10.0k shares |
Biggest puts
| JANE STREET GROUP, LLC | Reduced | $742.7k104.6k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $315.9k44.5k shares |
| SIMPLEX TRADING, LLC | Reduced | $2.1k300 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| TCG Crossover GP II, LLC 13G · passive investor new · filed 2026-05-12 | 9.9% |
| Adage Capital Management, L.P. 13G · institution filed 2026-08-12 | 8.4% |
| SUVRETTA CAPITAL MANAGEMENT, LLC 13G · passive investor +1.5 pts · filed 2025-08-13 | 7.6% |
| Frazier Life Sciences Public Fund, L.P. 13G · passive investor -0.7 pts · filed 2026-08-14 | 5.6% |
| ForGrowth III PA B.V. 13G · passive investor new · filed 2026-10-01 | 5.1% |
| BlackRock, Inc. 13G · institution +0.6 pts · filed 2026-10-27 | 5.0% |
Fell to 5% or below in the last year: Long Focus Capital Management, LLC (4.9%, 2026-08-14), Matrix Capital Management Company, LP (0.0%, 2026-05-11), Advent Life Sciences LLP (3.3%, 2026-02-17)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 5 | $891.4k | $603.2k |
| Q1 2025 | 0 | — | 4 | $334.0k | — |
| Q2 2025 | 2 | $343.0k | 3 | $52.1k | — |
| Q3 2025 | 0 | — | 1 | $51.7k | — |
| Q4 2025 | 0 | — | 4 | $233.2k | — |
| Q1 2026 | 0 | — | 5 | $618.8k | — |
| Q2 2026 | 0 | — | 2 | $164.7k | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-06-16 | Gibney Anthony S Officer | Sold | $82.3k12.8k shares |
| 2026-05-07 | Matrix Capital Management Company, LP +1 10% owner · See footnotes | Sold | $39.0m6.9m shares |
| 2026-04-16 | Kilroy Conor Officer | Sold | $82.4k11.7k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| TCG Crossover Management, LLC 1.63% of their portfolio | 9.5m $67.7m | New |
| MONTANOVA CAPITAL, LLC 1.08% of their portfolio | 7.2m $51.2m | Added +2.8m |
| Frazier Life Sciences Management, L.P. 1.10% of their portfolio | 7.1m $50.4m | Added +2.0m |
| Nantahala Capital Management, LLC 1.27% of their portfolio | 5.9m $41.9m | Added +3.8m |
| Long Focus Capital Management, LLC 1.48% of their portfolio | 5.1m $36.3m | Added +500.0k |
| BlackRock, Inc. 0.00% of their portfolio | 4.7m $33.4m | Added +1.1m |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.05% of their portfolio | 4.6m $32.9m | Reduced -241.1k |
| Caligan Partners LP 1.47% of their portfolio | 4.3m $30.5m | Added +4.1m |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 4.1m $29.1m | Added +1.9m |
| FCPM III SERVICES B.V. 3.84% of their portfolio | 4.1m $28.8m | New |
| ORBIMED ADVISORS LLC 0.45% of their portfolio | 3.3m $23.7m | New |
| Medicxi Ventures Management (Jersey) Ltd 12.16% of their portfolio | 3.0m $21.6m | Unchanged |
| RA CAPITAL MANAGEMENT, L.P. 0.15% of their portfolio | 2.5m $17.8m | New |
| Jupiter Topco LLC 0.01% of their portfolio | 2.5m $17.8m | First filing |
| Balyasny Asset Management L.P. 0.03% of their portfolio | 2.4m $16.7m | Added +1.8m |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 2.1m $14.7m | Unchanged |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.8m $12.5m | Added +443.9k |
| Redmile Group, LLC 0.79% of their portfolio | 1.7m $11.8m | New |
| EcoR1 Capital, LLC 0.59% of their portfolio | 1.7m $11.8m | New |
| Trails Edge Capital Partners, LP 1.63% of their portfolio | 1.4m $10.2m | New |
| Foresite Capital Management VI LLC 1.47% of their portfolio | 1.3m $9.5m | New |
| STATE STREET CORP 0.00% of their portfolio | 1.2m $8.7m | Added +258.3k |
| Woodline Partners LP 0.03% of their portfolio | 1.2m $8.6m | New |
| Bellevue Group AG 0.17% of their portfolio | 1.2m $8.3m | New |
| Vivo Capital, LLC 0.76% of their portfolio | 1.2m $8.3m | New |
| ACORN CAPITAL ADVISORS, LLC 1.80% of their portfolio | 929.1k $6.6m | Added +333.3k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.12% of their portfolio | 906.4k $6.4m | Added +886.0k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 871.3k $6.2m | Added +480.0k |
| LEVIN CAPITAL STRATEGIES, L.P. 0.40% of their portfolio | 838.1k $6.0m | Reduced -103.3k |
| B Group, Inc. 3.08% of their portfolio | 764.2k $5.4m | Added +166.7k |
| STEMPOINT CAPITAL LP 0.88% of their portfolio | 714.3k $5.1m | New |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 637.2k $4.5m | Added +240.0k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 618.9k $4.4m | Added +60.7k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 617.5k $4.4m | Reduced -480.2k |
| AWM Investment Company, Inc. 0.36% of their portfolio | 591.3k $4.2m | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 549.5k $3.9m | Added +118.9k |
| Regency Capital Management Inc.\DE 1.53% of their portfolio | 540.4k $3.8m | Added +7.9k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 464.7k $3.3m | Added +285.9k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 278.5k $2.0m | Reduced -136.7k |
| FMR LLC 0.00% of their portfolio | 255.3k $1.8m | Added +252.4k |
| MORGAN STANLEY 0.00% of their portfolio | 174.7k $1.2m | Reduced -49.3k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 174.2k $1.2m | Added +72.1k |
| Integral Health Asset Management, LLC 0.05% of their portfolio | 170.0k $1.2m | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 163.2k $1.2m | Added +66.0k |
| XTX Topco Ltd 0.01% of their portfolio | 149.9k $1.1m | Added +60.4k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 132.1k $938.1k | Added +4.6k |
| Quantinno Capital Management LP 0.00% of their portfolio | 130.7k $927.7k | Added +39.6k |
| ADAR1 Capital Management, LLC 0.04% of their portfolio | 130.2k $924.1k | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 118.6k $842.0k | Added +19.2k |
| PLATINUM INVESTMENT MANAGEMENT LTD 0.20% of their portfolio | 111.9k $794.2k | Unchanged |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 109.9k $780.2k | Added +63.7k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 109.6k $777.9k | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 106.4k $755.1k | Added +16.3k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 87.2k $618.9k | Reduced -38.2k |
| Nuveen, LLC 0.00% of their portfolio | 83.8k $595.0k | Added +11.1k |
| Fisher Asset Management, LLC 0.00% of their portfolio | 83.5k $592.9k | Unchanged |
| Jump Financial, LLC 0.00% of their portfolio | 73.0k $518.3k | New |
| MARTINGALE ASSET MANAGEMENT L P 0.01% of their portfolio | 71.3k $505.9k | New |
| UBS Group AG 0.00% of their portfolio | 69.2k $491.5k | Reduced -49.7k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 67.4k $478.6k | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 63.7k $452.0k | Reduced -1.1k |
| Permanent Capital Management, LP 0.06% of their portfolio | 62.4k $442.8k | Unchanged |
| TBH Global Asset Management, LLC 0.08% of their portfolio | 60.3k $428.3k | Unchanged |
| WATER ISLAND CAPITAL LLC 0.05% of their portfolio | 60.0k $426.0k | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 52.8k $353.0k | Added +11.1k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 51.9k $368.5k | Added +39.4k |
| Virtus Investment Advisers, LLC 0.08% of their portfolio | 51.0k $362.4k | New |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 49.0k $348.3k | New |
| Invesco Ltd. 0.00% of their portfolio | 44.9k $318.4k | Added +10.6k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 42.7k $303.0k | Added +413 |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 41.8k $297.1k | Added +3.9k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 40.9k $290.5k | Added +23.9k |
| BANK OF NOVA SCOTIA 0.00% of their portfolio | 40.8k $289.5k | New |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 37.7k $267.5k | Reduced -2.1k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 36.0k $255.9k | Reduced -21.4k |
| Jain Global LLC 0.00% of their portfolio | 30.6k $217.3k | New |
| COMMONWEALTH EQUITY SERVICES, LLC 0.00% of their portfolio | 30.3k $215.2k | Added +32 |
| Quadrature Capital Ltd 0.00% of their portfolio | 29.9k $212.1k | Added +19.2k |
| LETKO, BROSSEAU & ASSOCIATES INC 0.00% of their portfolio | 28.3k $200.9k | Unchanged |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 27.4k $188.4k | Added +3.8k |
| CANADA PENSION PLAN INVESTMENT BOARD 0.00% of their portfolio | 27.0k $191.7k | Unchanged |
| MetLife Investment Management, LLC 0.00% of their portfolio | 25.2k $179.1k | Added +258 |
| China Universal Asset Management Co., Ltd. 0.01% of their portfolio | 24.6k $174.3k | Added +13.3k |
| CITIGROUP INC 0.00% of their portfolio | 23.4k $166.4k | Added +10.9k |
| Engineers Gate Manager LP 0.00% of their portfolio | 22.2k $157.9k | New |
| nVerses Capital, LLC 0.23% of their portfolio | 20.8k $147.7k | New |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 20.7k $146.7k | Reduced -206 |
| TD Asset Management Inc 0.00% of their portfolio | 20.0k $142.0k | Reduced -20.5k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 18.0k $127.7k | Added +14.3k |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.00% of their portfolio | 17.9k $122.7k | Added +5.0k |
| Point72 Asset Management, L.P. 0.00% of their portfolio | 17.9k $126.8k | Reduced -3.8k |
| Inscription Capital, LLC 0.01% of their portfolio | 17.8k $126.4k | Unchanged |
| Creative Planning 0.00% of their portfolio | 15.5k $109.9k | Added +1.4k |
| BARCLAYS PLC 0.00% of their portfolio | 14.5k $102.7k | Added +2.9k |
| BROWN ADVISORY INC 0.00% of their portfolio | 13.4k $95.1k | Unchanged |
| ExodusPoint Capital Management, LP 0.00% of their portfolio | 13.3k $94.3k | Reduced -4.7k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 13.1k $93.0k | Unchanged |
| PRELUDE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 13.0k $92.3k | Unchanged |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 11.5k $81.8k | Reduced -4.3k |
| MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio | 11.4k $81.2k | New |