Aura Biosciences, Inc.
US ˙ NasdaqGM ˙ US05153U1079

SecurityAURA / Aura Biosciences, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership224,041 shares
Latest Disclosed Value $ 1,498,834
Morgan Stanley reports 2.58% increase in ownership of AURA / Aura Biosciences, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 224,041 shares of Aura Biosciences, Inc. (US:AURA) valued at $1,498,834 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 218,407 shares of Aura Biosciences, Inc.. This represents a change in shares of 2.58% during the quarter. The current value of the position is $1,521,238 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F AURA BIOSCIENCES COM 05153U107 224,041 5,634 2.58 1,499 25.88 0.0001
2026-05-27 2025-12-31 13F/A-1 AURA BIOSCIENCES COM 05153U107 218,407 39,902 22.35 1,190 7.89 0.0001
2026-02-13 2025-12-31 13F AURA BIOSCIENCES COM 05153U107 218,407 39,902 1,190 0.0001
2026-05-27 2025-09-30 13F/A-1 AURA BIOSCIENCES COM 05153U107 178,505 28,217 18.78 1,103 17.34 0.0001
2025-11-14 2025-09-30 13F AURA BIOSCIENCES COM 05153U107 178,505 28,217 1,103 0.0001
2025-08-15 2025-06-30 13F AURA BIOSCIENCES COM 05153U107 150,288 50,841 51.12 941 61.51 0.0001
2025-05-15 2025-03-31 13F AURA BIOSCIENCES COM 05153U107 99,447 -63,582 -39.00 583 -56.57 0.0000
2025-05-15 2024-12-31 13F/A-1 AURA BIOSCIENCES COM 05153U107 163,029 -20,965 -11.39 1,340 -18.24 0.0001
2025-02-14 2024-12-31 13F AURA BIOSCIENCES COM 05153U107 163,029 -20,965 1,340 0.0001
2025-05-14 2024-09-30 13F/A-2 AURA BIOSCIENCES COM 05153U107 183,994 101,154 122.11 1,639 161.82 0.0001
2025-02-14 2024-09-30 13F/A-1 AURA BIOSCIENCES COM 05153U107 183,994 101,154 1,639 0.0001
2024-11-14 2024-09-30 13F AURA BIOSCIENCES COM 05153U107 183,994 101,154 1,639 0.0000
2025-05-14 2024-06-30 13F/A-2 AURA BIOSCIENCES COM 05153U107 82,840 -4,016 -4.62 626 -8.08 0.0000
2024-10-17 2024-06-30 13F/A-1 AURA BIOSCIENCES COM 05153U107 82,840 -4,016 626 0.0000
2024-08-14 2024-06-30 13F AURA BIOSCIENCES COM 05153U107 82,840 -4,016 626 0.0000
2024-10-17 2024-03-31 13F/A-2 AURA BIOSCIENCES COM 05153U107 86,856 4,089 4.94 682 -7.09 0.0001
2024-08-16 2024-03-31 13F/A-1 AURA BIOSCIENCES COM 05153U107 86,856 4,089 682 0.0000
2024-05-15 2024-03-31 13F AURA BIOSCIENCES COM 05153U107 86,856 4,089 682 0.0001
2024-08-16 2023-12-31 13F/A-1 AURA BIOSCIENCES COM 05153U107 82,767 61,683 292.56 733 287.83 0.0001
2024-02-13 2023-12-31 13F AURA BIOSCIENCES COM 05153U107 82,767 61,683 733 0.0001
2023-11-15 2023-09-30 13F AURA BIOSCIENCES COM 05153U107 21,084 -59,581 -73.86 189 -81.02 0.0000
2023-08-14 2023-06-30 13F AURA BIOSCIENCES COM 05153U107 80,665 8,072 11.12 996 47.99 0.0001
2023-05-15 2023-03-31 13F AURA BIOSCIENCES COM 05153U107 72,593 7,990 12.37 674 -0.74 0.0001
2023-02-14 2022-12-31 13F AURA BIOSCIENCES COM 05153U107 64,603 9,451 17.14 678 -32.20 0.0001
2022-11-14 2022-09-30 13F AURA BIOSCIENCES COM 05153U107 55,152 613 1.12 1,000 29.53 0.0001
2022-10-27 2022-06-30 13F/A-1 AURA BIOSCIENCES COM 05153U107 54,539 53,430 4,817.85 772 3,116.67 0.0001
2022-08-15 2022-06-30 13F AURA BIOSCIENCES COM 05153U107 54,539 53,430 772 0.0001
2022-10-27 2022-03-31 13F/A-1 AURA BIOSCIENCES COM 05153U107 1,109 575 107.68 24 166.67 0.0000
2022-05-13 2022-03-31 13F AURA BIOSCIENCES COM 05153U107 1,109 575 24 0.0000
2022-02-14 2021-12-31 13F AURA BIOSCIENCES COM 05153U107 534 534 9 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.